# Tvornica Digitalnih Ideja (TDI) — Full content > TDI (Tvornica Digitalnih Ideja) is a software development and fractional CTO agency founded by Ivan Turkovic. 20+ years building software across fintech, blockchain, and AI. Based in Rijeka, Croatia — working globally. Canonical: https://tdi.hr Source: https://tdi.hr/llms.txt # English ## Your Startup's Technical Co-Founder — Without the Equity > We bring 20+ years of building software across fintech, blockchain, and AI to help startups build, ship, and scale their products. Twenty years of shipped software across fintech, blockchain, and AI. We architect, we build, we ship — and we stay until it runs in production. ## Key numbers - **20+** — Years shipping - **25+** — AWS services migrated - **1** — US Patent pending - **120M** — Rows, sub-500ms ## Three practices. One operator. ### 01. Product Development Full-stack apps, MVPs, SaaS platforms. AI integration, blockchain, payment systems — built to ship and to last. *Shipped across AI, fintech, blockchain, and SaaS — pre-MVP to scale.* - **Full-Stack Applications** — Rails, TypeScript, React, Node, Next. Database design through production deploy. - **AI & LLM Integration** — RAG pipelines, vector stores, agentic features. AI shipped inside real products — not demos. - **Blockchain & DeFi** — Smart contracts, multi-chain wallets, tokenomics. Ethereum, Solidity, production-grade. ### 02. Technical Strategy & Scaling Architecture reviews, cloud migrations, performance. Heroku to AWS, 25+ services, zero downtime. 120M-row tables brought to sub-500ms. *Led infrastructure at scale — from query plans to full cloud migrations.* - **Architecture & Design** — System assessment, scalability planning, technical-debt reduction. Systems meant to last. - **Cloud & Infrastructure** — AWS / GCP. Container orchestration, CI/CD, zero-downtime migrations. - **Performance** — Database tuning, query optimization, caching, load testing. Real numbers, measured. ### 03. Fractional CTO Technical leadership without a full-time hire. Team building, dev process, mentorship, hands-on code when it matters. *Served as CTO, Chief Architect, Staff Engineer — seed to scale.* - **Team Building & Hiring** — Engineering structure, hiring pipelines, culture. Find and retain the right people. - **Development Process** — CI/CD, agile, code review, quality gates. Process that helps teams ship, not perform. - **Technical Mentorship** — Coaching, architecture workshops, best-practice training for your team. ## Five phases. No surprises. ### i. Discovery Understand the business, the users, the constraints. Ask the hard questions early so they don't become expensive later. ### ii. Planning & Architecture Technical architecture, the right stack, milestones you can hold us to. Realistic timelines, not theatrical ones. ### iii. Building Short iterations, demos every week or two. Working software, not mockups. Clean, tested, production-ready code. ### iv. Launch Infrastructure, deployment, monitoring, and the actual launch. Working in production — not just on localhost. ### v. Support & Iteration We stick around. Bug fixes, performance, new features. We also help you hire and onboard the team that takes it from here. ## Studio **Founder · Ivan Turkovic** Published author (PhoneGap Essentials, Packt). US patent pending for blockchain payments. CS from the University of Ljubljana. Has served as CTO, Chief Architect, Staff Engineer across fintech, blockchain, and AI. - **Based**: Rijeka, HR - **Working**: Globally - **Modes**: Remote · Embedded · Contract ### House rules - **Craftsmanship over velocity** — Clean, durable systems. Moving fast is knowing what to build — and what to skip. - **Honest estimates** — What it'll actually take, in time and money. No scope creep theatre, no hidden line items. - **Software that lasts** — Meant to run in production for years. Not throwaway prototypes. Not over-engineered monuments. ### Focus areas Generative AI · LLM Systems · Fintech · Blockchain · DeFi · Payment Architecture · Cloud-Native · Distributed Systems ### Stack Ruby on Rails · TypeScript · React · Next.js · Node.js · Python · Rust · Solidity · AWS · GCP · PostgreSQL · Redis · Elasticsearch · MongoDB · Docker ## Track record - Pre-MVP AI investment platform → public beta in 4 months - Multi-chain DeFi wallet, iOS + Android - Heroku → AWS, 25+ services, zero downtime - Blockchain payment platform — US patent pending - Chief Architect at AI-driven dev platform - 120M+ currency pairs, sub-500ms queries - Webcasting platform for a UN agency - Co-founded cloud printing · coupons · hours apps ## Contact Have a thing you want to build? - Email: contact@tdi.hr - Phone: +385 (0)91 9411 859 - Business hours: Mon–Fri · 09:00–18:00 CET --- ## Related pages - [Services](/en/services) - [How We Work](/en/how-we-work) - [What We Build](/en/what-we-build) - [About](/en/about) - [Contact](/en/contact) - [Calculator](/en/calculator) - [PMF](/en/pmf-calculator) --- ## What We Can Do For You > Hands-on technical expertise for startups that need to build fast and scale smart ## Categories ### Product Development Full-stack apps, MVPs, SaaS platforms. We build with Rails, TypeScript, React, Node.js, Next.js, and Python. AI integration (LLMs, RAG, vector DBs), blockchain/DeFi platforms, and payment systems. *We've shipped products across AI, fintech, blockchain, and SaaS — from pre-MVP to scale.* **Services:** - **Full-Stack Applications** — Complete web and mobile applications built with Rails, TypeScript, React, Node.js, and Next.js. From database design to production deployment. - **AI & LLM Integration** — Applied AI, generative AI features, RAG pipelines, vector databases, and LLM-powered products. We build AI into real products, not demos. - **Blockchain & DeFi Platforms** — Smart contracts, multi-chain wallets, DeFi protocols, tokenomics design, and payment systems built on Ethereum and Solidity. ### Technical Strategy & Scaling Architecture reviews, cloud migrations, and performance optimization. We've migrated platforms from Heroku to AWS using 25+ services with zero downtime, and optimized queries across 120M+ rows. *We've led infrastructure at scale — from database tuning to full cloud migrations.* **Services:** - **Architecture Reviews & Design** — System architecture assessment, scalability planning, and technical debt reduction. We design systems meant to last. - **Cloud Migrations & Infrastructure** — AWS, GCP infrastructure design. Container orchestration, CI/CD pipelines, and zero-downtime migration strategies. - **Performance Optimization** — Database tuning, query optimization, caching strategies, and load testing. We've tuned systems handling 120M+ currency pairs to sub-500ms query times. ### Fractional CTO / Technical Leadership Our founder has built and led engineering teams as CTO and Chief Architect. Team hiring, dev process setup (CI/CD, Agile), and mentorship. Available as fractional CTO, staff engineer, or solutions architect. *Our founder has served as CTO, Chief Architect, and Staff Engineer at companies from seed to scale.* **Services:** - **Team Building & Hiring** — Engineering team structure design, hiring processes, and culture building. We help you find and retain the right people. - **Development Process Setup** — CI/CD pipelines, Agile workflows, code review practices, and quality gates. We set up processes that actually help teams ship. - **Technical Mentorship** — Developer coaching, architecture workshops, and best practices training. We help your team level up. ## FAQ ### What types of software does TDI build? TDI builds full-stack web applications, AI/LLM-powered products, blockchain and DeFi platforms, SaaS infrastructure, and startup MVPs. We work with Ruby on Rails, TypeScript, React, Node.js, Python, and Solidity. ### What does a fractional CTO do? A fractional CTO provides technical leadership, team building, and development process setup on a part-time or contract basis. TDI's founder brings 20+ years of CTO and Chief Architect experience without the cost of a full-time hire. ### How long does it take to build an MVP? Most MVPs take 2-4 months depending on complexity. TDI has taken AI products from pre-MVP to public beta in 4 months, including team building and architecture design. --- ## Related pages - [Home](/en) - [How We Work](/en/how-we-work) - [What We Build](/en/what-we-build) - [About](/en/about) - [Contact](/en/contact) - [Calculator](/en/calculator) - [PMF](/en/pmf-calculator) --- ## How We Work > We keep it simple: understand the problem, plan the solution, build it right, ship it fast. Here's what that looks like in practice. ## Our Process Every project is different, but the fundamentals stay the same. We work in clear phases so you always know what's happening. ### Phase 1 · Discovery We start by understanding your business, your users, and your constraints. What are you building? Who is it for? What does success look like? We ask the hard questions early so we don't waste time later. ### Phase 2 · Planning & Architecture We design the technical architecture, pick the right stack, and break the work into clear milestones. You get a realistic timeline and a plan you can hold us to. ### Phase 3 · Building We build in short iterations with regular demos. You see working software every week or two — not just mockups or status reports. We write clean, tested, production-ready code. ### Phase 4 · Launch Infrastructure setup, deployment pipelines, monitoring, and the actual launch. We make sure everything works in production, not just on localhost. ### Phase 5 · Support & Iteration After launch, we stick around. Bug fixes, performance tuning, feature additions — we support what we build. We also help you hire and onboard a team when you're ready. ## What you get - **Production Codebase** — Clean, tested, well-documented code. Version-controlled, with a full test suite and build scripts. It's yours — no vendor lock-in. - **Technical Documentation** — Architecture diagrams, API docs, database schemas, and deployment guides. Everything your future team needs to take over. - **Production Infrastructure** — Cloud infrastructure, CI/CD pipelines, monitoring, and alerting. Set up right from day one. - **Development Process** — Agile workflows, code review practices, and quality gates. A process that actually helps you ship faster. --- ## Related pages - [Home](/en) - [Services](/en/services) - [What We Build](/en/what-we-build) - [About](/en/about) - [Contact](/en/contact) - [Calculator](/en/calculator) - [PMF](/en/pmf-calculator) --- ## What We Build > We specialize in technically demanding products across AI, fintech, blockchain, and SaaS. Here are the kinds of projects we take on. ## Categories ### AI & LLM Products Applied AI, generative AI integration, RAG pipelines, vector databases, and LLM-powered features. We build AI into real products — not proof-of-concepts that never ship. *Built an AI investment platform from pre-MVP to public beta in 4 months. Built the team, defined the architecture, and shipped.* **Stack:** Python, TypeScript, LangChain, OpenAI, Vector DBs, RAG, MLOps, AWS ### Fintech & Payment Systems Payment gateways, multi-currency platforms, billing systems, and financial infrastructure. We build systems that handle real money reliably. *Architected a blockchain payment platform (US patent pending). Optimized MySQL for 120M+ currency pairs with sub-500ms query times.* **Stack:** Ruby on Rails, Node.js, PostgreSQL, Redis, Stripe, Blockchain, AWS ### Blockchain & DeFi Smart contracts, multi-chain wallets, DeFi protocols, and tokenomics design. We've built production blockchain infrastructure, not just toy contracts. *Architected a multi-chain DeFi wallet for iOS and Android serving crypto users globally.* **Stack:** Solidity, Ethereum, TypeScript, React Native, Web3.js, Hardhat, IPFS ### SaaS Platforms Multi-tenant architecture, subscription billing, scalable cloud infrastructure, and the full platform engineering stack. From zero to production-ready SaaS. *Led full cloud migration from Heroku to AWS using 25+ services with zero downtime. Built custom performance testing frameworks.* **Stack:** Ruby on Rails, TypeScript, React, AWS, PostgreSQL, Redis, Docker, Terraform ### MVPs & Startup Products Rapid prototyping, full-stack builds, and go-to-market technical execution. Our founder has co-founded multiple startups and we know what it takes to ship fast without cutting corners. *Co-founded multiple startups across cloud printing, coupon platforms, and opening hours apps. Shipped MVPs across mobile, web, and IoT.* **Stack:** React, Next.js, Node.js, Ruby on Rails, React Native, PostgreSQL, Firebase --- ## Related pages - [Home](/en) - [Services](/en/services) - [How We Work](/en/how-we-work) - [About](/en/about) - [Contact](/en/contact) - [Calculator](/en/calculator) - [PMF](/en/pmf-calculator) --- ## About TDI TDI (Tvornica Digitalnih Ideja) is a software development and technical leadership agency. We help startups and growing companies build products, scale infrastructure, and set up engineering teams that deliver. Founded by Ivan Turkovic, TDI brings 20+ years of hands-on experience across fintech, blockchain, AI, and SaaS. Based in Rijeka, Croatia — working with clients globally. ## Meet the Founder Ivan Turkovic is a published author (PhoneGap Essentials, Packt Publishing), holds a US patent pending for blockchain payment solutions, and has a CS degree from the University of Ljubljana. He has served as CTO, Chief Architect, Solutions Architect, and Staff/Principal Engineer across startups and established companies in fintech, blockchain, and AI. Based in Rijeka, Croatia. Available globally as a fractional CTO, staff engineer, or solutions architect — remote, contract, or embedded with your team. ## Our Track Record Highlights from 20+ years of building and shipping software across industries. - Took over a pre-MVP AI investment platform as Interim CTO — built the team, defined the architecture, shipped public beta in 4 months - Architected a multi-chain DeFi wallet (iOS/Android) serving crypto users globally - Led infrastructure migration from Heroku to AWS using 25+ services with zero downtime - Architected a blockchain payment platform that resulted in a US patent pending - Chief Architect at an AI-driven development platform spanning offices globally - Built a webcasting platform for a specialized United Nations agency - Co-founded multiple startups: cloud printing, coupon platforms, opening hours apps - Optimized MySQL for 120M+ currency pairs, achieving sub-500ms query times ## How We Think About Technology - **Craftsmanship Over Velocity** — We build clean, durable systems. Moving fast doesn't mean cutting corners — it means knowing what to build and what to skip. - **Honest Estimates** — We tell you what it'll actually take — in time, money, and complexity. No scope creep surprises, no hidden costs. - **Software That Lasts** — We build things meant to run in production for years. Not throwaway prototypes, not over-engineered monuments — just solid software. ## Core Focus Areas Generative AI · LLM Systems · Fintech · Blockchain · DeFi · Payment Architecture · Cloud-Native Systems · Distributed Systems ## Our Location - **Address**: Antuna Barca 7, 51000 Rijeka, Croatia - **Email**: contact@tdi.hr - **Phone**: +385 (0)91 9411 859 --- ## Related pages - [Home](/en) - [Services](/en/services) - [How We Work](/en/how-we-work) - [What We Build](/en/what-we-build) - [Contact](/en/contact) - [Calculator](/en/calculator) - [PMF](/en/pmf-calculator) --- ## Let's Talk > Have a project in mind? We'd love to hear about it. Book a call or send us a message. ## Book a Free Call The fastest way to get started. Tell us about your project and we'll give you an honest assessment of what it'll take. ## Contact Information - **Address**: Antuna Barca 7, 51000 Rijeka, Croatia - **Email**: contact@tdi.hr - **Phone**: +385 (0)91 9411 859 ## Business Hours - Monday - Friday — 9:00 AM - 6:00 PM - Saturday - Sunday — Closed --- ## Related pages - [Home](/en) - [Services](/en/services) - [How We Work](/en/how-we-work) - [What We Build](/en/what-we-build) - [About](/en/about) - [Calculator](/en/calculator) - [PMF](/en/pmf-calculator) --- ## Transparent pricing for two ways to work with us. > Transparent pricing for two ways to work with TDI: Fractional CTO retainer and Hands-on hourly engagements. Instant estimate with full breakdown. ## Services ### Fractional CTO Monthly retainer · strategic + technical leadership **From $2,500 / mo** ### Hands-on Hourly billing · code, architecture, infra, AI, web3 **From $150 / hr** ## Fractional CTO engagement scopes - **Strategic Advisory** (5h / wk) — High-level technology strategy, architecture reviews, and executive guidance. - **Fractional Leadership** (10h / wk) — Complete technical leadership with team management and strategic execution. - **Full CTO Partnership** (20h / wk) — Comprehensive CTO responsibilities with board-level reporting and crisis management. ## Hands-on work types - **Full-stack development** — Rails · TypeScript · React · Node · Next - **Infra & performance** — AWS / GCP migration · DB tuning · CI/CD - **Architecture & strategy** — System design · tech selection · reviews - **AI / LLM integration** — RAG · vector DBs · agents · LLM features - **Blockchain & DeFi** — Smart contracts · multi-chain · Solidity *Estimates indicative. Final proposal depends on scope, cadence, and on-call expectations.* --- ## Related pages - [Home](/en) - [Services](/en/services) - [How We Work](/en/how-we-work) - [What We Build](/en/what-we-build) - [About](/en/about) - [Contact](/en/contact) - [PMF](/en/pmf-calculator) --- ## Find out if you have product-market fit in 60 seconds. > Measure product-market fit with a dual 0–7 metrics score and the classic Sean Ellis 40% survey. Devtools benchmarks, Wilson confidence intervals, segmentation. Free, bilingual, fully client-side. ## Services ### Compass 7 metrics · dual 0–7 score · devtools benchmarks ### Survey Paste responses · Sean Ellis 40% · Wilson CI ## Two complementary methods, one tool. Survey mode uses the Sean Ellis test: if ≥40% of your users would be "very disappointed" if they could no longer use your product, you likely have PMF. The best-known teams have used this test to lift their score from the twenties into the fifties in a single year. Compass mode scores 5 behavioral metrics (TTFV, retention, NRR, conversion, organic) against devtools-industry benchmarks plus an ARR-based revenue stage. Signal ahead of revenue = distribution problem; revenue ahead of signal = foundation risk. ## PMF levels (0–7) - **0** — Building - **1** — Alpha - **2** — Beta - **3** — Traction - **4** — Early PMF - **5** — Growth - **6** — Category leader - **7** — Category definer ## Questions we get. ### How many survey responses do I need? You get directionally useful signal around 40 responses, reliable data above 100. Below 40 our tool flags "low confidence" and shows a wider Wilson 95% CI so you can see the noise. ### Why 40% and not 50%? Sean Ellis derived 40% empirically from ~100 startups: companies that beat 40% almost always found growth; those below almost always struggled. It's calibrated from data, not a round number. ### Why "disappointed" instead of "satisfied"? Loss framing surfaces dependency. Positive framing invites politeness bias — users say they'd miss a product they rarely use. Disappointment reveals who actually relies on you. ### Does this work for B2C? Survey mode works for any product. Compass mode benchmarks are devtools-specific (based on 37 companies) — so the buckets will skew for consumer apps. Use Compass as a framework, not a scorecard. ### Is NPS enough? No. NPS measures referral intent; PMF measures dependency. Promoters who are also "very disappointed" are your most valuable cohort — use both and cross-reference. ### Does my data leave my browser? No. Everything is computed client-side. Share links encode only aggregate numbers — never raw survey answers or CSV rows. ### What if I only have 35 responses? You'll see a "low confidence" badge and a wide confidence interval. Interpret cautiously; re-run when you hit 100. Do NOT nag users for responses — non-response is baked into the 40% benchmark. *Benchmarks are devtools-industry aggregates. Directional, not precise — your mileage will vary.* --- ## Related pages - [Home](/en) - [Services](/en/services) - [How We Work](/en/how-we-work) - [What We Build](/en/what-we-build) - [About](/en/about) - [Contact](/en/contact) - [Calculator](/en/calculator) --- # Hrvatski ## Tehnički suosnivač vašeg startupa — bez udjela > Donosimo 20+ godina iskustva u razvoju softvera u fintechu, blockchainu i AI-ju kako bismo pomogli startupima graditi, isporučiti i skalirati njihove proizvode. Dvadeset godina isporučenog softvera u fintechu, blockchainu i AI-ju. Arhitektiramo, gradimo, isporučujemo — i ostajemo dok ne radi u produkciji. ## Brojke - **20+** — Godina isporuke - **25+** — AWS servisa migrirano - **1** — US patent u tijeku - **120M** — Redaka, ispod 500ms ## Tri prakse. Jedan operator. ### 01. Razvoj proizvoda Full-stack aplikacije, MVP-ovi, SaaS platforme. AI integracija, blockchain, sustavi plaćanja — građeni za isporuku i dugoročno trajanje. *Isporučivali u AI-ju, fintechu, blockchainu i SaaS-u — od pre-MVP-a do skaliranja.* - **Full-stack aplikacije** — Rails, TypeScript, React, Node, Next. Od dizajna baze do produkcijskog deploymenta. - **AI i LLM integracija** — RAG pipeline-ovi, vektorske baze, agentske značajke. AI unutar stvarnih proizvoda — ne demo. - **Blockchain i DeFi** — Smart ugovori, multi-chain novčanici, tokenomika. Ethereum, Solidity, produkcijska razina. ### 02. Tehnička strategija i skaliranje Pregledi arhitekture, cloud migracije, performanse. Heroku → AWS, 25+ servisa, bez downtime-a. 120M redaka na ispod 500ms. *Vodili infrastrukturu u velikom mjerilu — od planova upita do potpunih cloud migracija.* - **Arhitektura i dizajn** — Procjena sustava, planiranje skalabilnosti, smanjenje tehničkog duga. Sustavi koji traju. - **Cloud i infrastruktura** — AWS / GCP. Orkestracija kontejnera, CI/CD, migracije bez downtime-a. - **Performanse** — Tuniranje baze, optimizacija upita, cachiranje, load testing. Izmjereni brojevi. ### 03. Fractional CTO Tehničko vodstvo bez zaposlenja na puno radno vrijeme. Izgradnja tima, procesi, mentorstvo, kod kad je važan. *Bili CTO, glavni arhitekt, Staff Engineer — od seed-a do skaliranja.* - **Izgradnja tima i zapošljavanje** — Inženjerska struktura, procesi zapošljavanja, kultura. Pronaći i zadržati prave ljude. - **Razvojni proces** — CI/CD, agile, code review, kvaliteta. Proces koji pomaže timovima, ne glumi. - **Tehničko mentorstvo** — Coaching, radionice arhitekture, trening najboljih praksi za vaš tim. ## Pet faza. Bez iznenađenja. ### i. Otkrivanje Razumjeti poslovanje, korisnike, ograničenja. Postaviti teška pitanja rano kako kasnije ne bi postala skupa. ### ii. Planiranje i arhitektura Tehnička arhitektura, pravi stack, milestoneovi koje možete držati. Realistični rokovi, ne teatralni. ### iii. Izgradnja Kratke iteracije, demonstracije svaki tjedan ili dva. Radni softver, ne mockupi. Čist, testiran, produkcijski kod. ### iv. Lansiranje Infrastruktura, deployment, monitoring i samo lansiranje. Radi u produkciji — ne samo na localhostu. ### v. Podrška i iteracija Ostajemo. Popravci bugova, performanse, nove značajke. Pomažemo zaposliti i onboardati tim koji preuzima dalje. ## Studio **Osnivač · Ivan Turković** Objavljeni autor (PhoneGap Essentials, Packt). US patent u tijeku za blockchain plaćanja. Informatika na Sveučilištu u Ljubljani. Bio CTO, glavni arhitekt, Staff Engineer u fintechu, blockchainu i AI-ju. - **Sjedište**: Rijeka, HR - **Rad**: Globalno - **Načini**: Remote · Ugrađeni · Ugovor ### Kućna pravila - **Majstorstvo iznad brzine** — Čisti, izdržljivi sustavi. Brzo znači znati što graditi — i što preskočiti. - **Poštene procjene** — Što će stvarno trebati, u vremenu i novcu. Bez teatra s opsegom, bez skrivenih stavki. - **Softver koji traje** — Namijenjen radu u produkciji godinama. Ne jednokratni prototipovi. Ne preinženjerski spomenici. ### Područja fokusa Generativni AI · LLM sustavi · Fintech · Blockchain · DeFi · Arhitektura plaćanja · Cloud-Native · Distribuirani sustavi ### Tehnologije Ruby on Rails · TypeScript · React · Next.js · Node.js · Python · Rust · Solidity · AWS · GCP · PostgreSQL · Redis · Elasticsearch · MongoDB · Docker ## Iskustvo - Pre-MVP AI investicijska platforma → javna beta za 4 mjeseca - Multi-chain DeFi novčanik, iOS + Android - Heroku → AWS, 25+ servisa, bez downtime-a - Blockchain platna platforma — US patent u tijeku - Glavni arhitekt na AI-driven dev platformi - 120M+ valutnih parova, upiti ispod 500ms - Webcasting platforma za agenciju UN-a - Suosnovani cloud printing · kuponi · radno vrijeme ## Kontakt Imate nešto što želite izgraditi? - Email: contact@tdi.hr - Telefon: +385 (0)91 9411 859 - Radno vrijeme: Pon–Pet · 09:00–18:00 CET --- ## Povezane stranice - [Usluge](/hr/usluge) - [Kako radimo](/hr/kako-radimo) - [Što gradimo](/hr/sto-gradimo) - [O nama](/hr/o-nama) - [Kontakt](/hr/kontakt) - [Kalkulator](/hr/kalkulator) - [PMF](/hr/pmf-kalkulator) --- ## Što možemo učiniti za vas > Hands-on tehnička stručnost za startupe koji trebaju brzo graditi i pametno skalirati ## Kategorije ### Razvoj proizvoda Full-stack aplikacije, MVP-ovi, SaaS platforme. Gradimo s Railsom, TypeScriptom, Reactom, Node.js-om, Next.js-om i Pythonom. AI integracija (LLM-ovi, RAG, vektorske baze), blockchain/DeFi platforme i sustavi plaćanja. *Isporučivali smo proizvode u AI-ju, fintechu, blockchainu i SaaS-u — od pre-MVP-a do skaliranja.* **Usluge:** - **Full-Stack aplikacije** — Kompletne web i mobilne aplikacije izgrađene s Railsom, TypeScriptom, Reactom, Node.js-om i Next.js-om. Od dizajna baze podataka do produkcijskog deploymenta. - **AI i LLM integracija** — Primijenjeni AI, generativne AI značajke, RAG pipeline-ovi, vektorske baze podataka i proizvodi pokretani LLM-ovima. Gradimo AI u stvarne proizvode, ne u demo verzije. - **Blockchain i DeFi platforme** — Pametni ugovori, multi-chain novčanici, DeFi protokoli, dizajn tokenomike i sustavi plaćanja izgrađeni na Ethereumu i Solidityju. ### Tehnička strategija i skaliranje Pregledi arhitekture, migracije u oblak i optimizacija performansi. Migrirali smo platforme s Herokua na AWS koristeći 25+ servisa bez downtime-a, i optimizirali upite preko 120M+ redova. *Vodili smo infrastrukturu u velikom mjerilu — od tuniranja baza podataka do potpunih migracija u oblak.* **Usluge:** - **Pregledi i dizajn arhitekture** — Procjena arhitekture sustava, planiranje skalabilnosti i smanjenje tehničkog duga. Dizajniramo sustave koji traju. - **Cloud migracije i infrastruktura** — AWS, GCP dizajn infrastrukture. Orkestracija kontejnera, CI/CD pipeline-ovi i strategije migracije bez downtime-a. - **Optimizacija performansi** — Tuniranje baza podataka, optimizacija upita, strategije cachiranja i testiranje opterećenja. Tunirali smo sustave koji obrađuju 120M+ valutnih parova na upite ispod 500ms. ### Fractional CTO / Tehničko vodstvo Naš osnivač je gradio i vodio inženjerske timove kao CTO i glavni arhitekt. Zapošljavanje timova, postavljanje razvojnih procesa (CI/CD, Agile) i mentorstvo. Dostupni kao fractional CTO, staff engineer ili solutions architect. *Naš osnivač je bio CTO, glavni arhitekt i Staff Engineer u tvrtkama od seed faze do skaliranja.* **Usluge:** - **Izgradnja tima i zapošljavanje** — Dizajn strukture inženjerskog tima, procesi zapošljavanja i izgradnja kulture. Pomažemo vam pronaći i zadržati prave ljude. - **Postavljanje razvojnog procesa** — CI/CD pipeline-ovi, Agile radni tokovi, prakse pregleda koda i provjere kvalitete. Postavljamo procese koji stvarno pomažu timovima isporučivati. - **Tehničko mentorstvo** — Coaching developera, radionice arhitekture i trening najboljih praksi. Pomažemo vašem timu da napreduje. ## Česta pitanja ### Kakve vrste softvera TDI gradi? TDI gradi full-stack web aplikacije, AI/LLM proizvode, blockchain i DeFi platforme, SaaS infrastrukturu i startup MVP-ove. Radimo s Ruby on Railsom, TypeScriptom, Reactom, Node.js-om, Pythonom i Solidityjem. ### Što radi fractional CTO? Fractional CTO pruža tehničko vodstvo, izgradnju tima i postavljanje razvojnih procesa na part-time ili ugovornoj bazi. Osnivač TDI-ja donosi 20+ godina CTO i Chief Architect iskustva bez troškova zaposlenja na puno radno vrijeme. ### Koliko traje izgradnja MVP-a? Većina MVP-ova traje 2-4 mjeseca ovisno o složenosti. TDI je vodio AI proizvode od pre-MVP-a do javne bete u 4 mjeseca, uključujući izgradnju tima i dizajn arhitekture. --- ## Povezane stranice - [Početna](/hr) - [Kako radimo](/hr/kako-radimo) - [Što gradimo](/hr/sto-gradimo) - [O nama](/hr/o-nama) - [Kontakt](/hr/kontakt) - [Kalkulator](/hr/kalkulator) - [PMF](/hr/pmf-kalkulator) --- ## Kako radimo > Držimo stvari jednostavnima: razumijemo problem, planiramo rješenje, izgradimo ga kako treba, isporučimo brzo. Evo kako to izgleda u praksi. ## Naš proces Svaki projekt je drugačiji, ali temelji ostaju isti. Radimo u jasnim fazama tako da uvijek znate što se događa. ### Faza 1 · Otkrivanje Počinjemo razumijevanjem vašeg poslovanja, vaših korisnika i vaših ograničenja. Što gradite? Za koga je? Kako izgleda uspjeh? Postavljamo teška pitanja rano da ne gubimo vrijeme kasnije. ### Faza 2 · Planiranje i arhitektura Dizajniramo tehničku arhitekturu, biramo pravi stack i razbijamo posao na jasne prekretnice. Dobivate realistični vremenski okvir i plan za koji nas možete držati odgovornima. ### Faza 3 · Izgradnja Gradimo u kratkim iteracijama s redovitim demonstracijama. Vidite funkcionalni softver svaki tjedan ili dva — ne samo mockupe ili izvještaje o statusu. Pišemo čist, testiran, produkcijski spreman kod. ### Faza 4 · Lansiranje Postavljanje infrastrukture, deployment pipeline-ovi, monitoring i samo lansiranje. Osiguravamo da sve funkcionira u produkciji, ne samo na localhostu. ### Faza 5 · Podrška i iteracija Nakon lansiranja, tu smo. Popravci bugova, tuniranje performansi, dodavanje značajki — podržavamo ono što izgradimo. Također pomažemo pri zapošljavanju i onboardingu tima kad budete spremni. ## Što dobivate - **Produkcijska baza koda** — Čist, testiran, dobro dokumentiran kod. Pod kontrolom verzija, s kompletnim paketom testova i build skriptama. Vaš je — bez vendor lock-ina. - **Tehnička dokumentacija** — Dijagrami arhitekture, API dokumentacija, sheme baza podataka i vodiči za deployment. Sve što vaš budući tim treba za preuzimanje. - **Produkcijska infrastruktura** — Cloud infrastruktura, CI/CD pipeline-ovi, monitoring i alerting. Postavljeno ispravno od prvog dana. - **Razvojni proces** — Agile radni tokovi, prakse pregleda koda i provjere kvalitete. Proces koji vam stvarno pomaže brže isporučivati. --- ## Povezane stranice - [Početna](/hr) - [Usluge](/hr/usluge) - [Što gradimo](/hr/sto-gradimo) - [O nama](/hr/o-nama) - [Kontakt](/hr/kontakt) - [Kalkulator](/hr/kalkulator) - [PMF](/hr/pmf-kalkulator) --- ## Što gradimo > Specijaliziramo se za tehnički zahtjevne proizvode u AI-ju, fintechu, blockchainu i SaaS-u. Evo kakve projekte preuzimamo. ## Kategorije ### AI i LLM proizvodi Primijenjeni AI, integracija generativnog AI-ja, RAG pipeline-ovi, vektorske baze podataka i značajke pokretane LLM-ovima. Gradimo AI u stvarne proizvode — ne proof-of-concepte koji nikad ne ugledaju svjetlo dana. *Izgradili AI investicijsku platformu od pre-MVP-a do javne bete u 4 mjeseca. Izgradili tim, definirali arhitekturu i isporučili.* **Tehnologije:** Python, TypeScript, LangChain, OpenAI, Vector DBs, RAG, MLOps, AWS ### Fintech i sustavi plaćanja Platni sustavi, multi-valutne platforme, sustavi naplate i financijska infrastruktura. Gradimo sustave koji pouzdano obrađuju pravi novac. *Arhitektirali blockchain platnu platformu (US patent u tijeku). Optimizirali MySQL za 120M+ valutnih parova s upitima ispod 500ms.* **Tehnologije:** Ruby on Rails, Node.js, PostgreSQL, Redis, Stripe, Blockchain, AWS ### Blockchain i DeFi Pametni ugovori, multi-chain novčanici, DeFi protokoli i dizajn tokenomike. Gradili smo produkcijsku blockchain infrastrukturu, ne samo igračke ugovore. *Arhitektirali multi-chain DeFi novčanik za iOS i Android koji služi kripto korisnicima globalno.* **Tehnologije:** Solidity, Ethereum, TypeScript, React Native, Web3.js, Hardhat, IPFS ### SaaS platforme Multi-tenant arhitektura, pretplatnička naplata, skalabilna cloud infrastruktura i cijeli stack platformskog inženjeringa. Od nule do produkcijski spremnog SaaS-a. *Vodili potpunu migraciju u oblak s Herokua na AWS koristeći 25+ servisa bez downtime-a. Izgradili prilagođene okvire za testiranje performansi.* **Tehnologije:** Ruby on Rails, TypeScript, React, AWS, PostgreSQL, Redis, Docker, Terraform ### MVP-ovi i startup proizvodi Brza izrada prototipova, full-stack izgradnja i tehnička provedba za izlazak na tržište. Naš osnivač je suosnovao više startupa i znamo što je potrebno za brzu isporuku bez rezanja uglova. *Suosnovali više startupa u područjima cloud printinga, kuponskih platformi i aplikacija za radno vrijeme. Isporučivali MVP-ove na mobilnim, web i IoT platformama.* **Tehnologije:** React, Next.js, Node.js, Ruby on Rails, React Native, PostgreSQL, Firebase --- ## Povezane stranice - [Početna](/hr) - [Usluge](/hr/usluge) - [Kako radimo](/hr/kako-radimo) - [O nama](/hr/o-nama) - [Kontakt](/hr/kontakt) - [Kalkulator](/hr/kalkulator) - [PMF](/hr/pmf-kalkulator) --- ## O TDI-ju TDI (Tvornica Digitalnih Ideja) je agencija za razvoj softvera i tehničko vodstvo. Pomažemo startupima i rastućim tvrtkama graditi proizvode, skalirati infrastrukturu i postaviti inženjerske timove koji isporučuju. Osnivač Ivan Turković donosi 20+ godina hands-on iskustva u fintechu, blockchainu, AI-ju i SaaS-u. Sjedište u Rijeci, Hrvatska — radimo s klijentima globalno. ## Upoznajte osnivača Ivan Turković je objavljeni autor (PhoneGap Essentials, Packt Publishing), nositelj US patenta u tijeku za blockchain platna rješenja, i ima diplomu informatike sa Sveučilišta u Ljubljani. Bio je CTO, glavni arhitekt, Solutions Architect i Staff/Principal Engineer u startupima i etabliranim tvrtkama u fintechu, blockchainu i AI-ju. Sjedište u Rijeci, Hrvatska. Dostupan globalno kao fractional CTO, staff engineer ili solutions architect — remote, ugovorno ili ugrađen u vaš tim. ## Naš track record Najvažniji trenuci iz 20+ godina izgradnje i isporuke softvera u raznim industrijama. - Preuzeli pre-MVP AI investicijsku platformu kao privremeni CTO — izgradili tim, definirali arhitekturu, isporučili javnu betu u 4 mjeseca - Arhitektirali multi-chain DeFi novčanik (iOS/Android) koji služi kripto korisnicima globalno - Vodili migraciju infrastrukture s Herokua na AWS koristeći 25+ servisa bez downtime-a - Arhitektirali blockchain platnu platformu koja je rezultirala US patentom u tijeku - Glavni arhitekt na AI-driven razvojnoj platformi s uredima globalno - Izgradili webcasting platformu za specijaliziranu agenciju Ujedinjenih naroda - Suosnovali više startupa: cloud printing, kuponske platforme, aplikacije za radno vrijeme - Optimizirali MySQL za 120M+ valutnih parova, postižući upite ispod 500ms ## Kako razmišljamo o tehnologiji - **Majstorstvo iznad brzine** — Gradimo čiste, izdržljive sustave. Brzo kretanje ne znači rezanje uglova — znači znati što graditi, a što preskočiti. - **Poštene procjene** — Kažemo vam što će stvarno trebati — u vremenu, novcu i složenosti. Bez iznenađenja u opsegu, bez skrivenih troškova. - **Softver koji traje** — Gradimo stvari namijenjene za rad u produkciji godinama. Ne jednokratne prototipove, ne preinženjerske spomenike — samo solidan softver. ## Ključna područja fokusa Generativni AI · LLM sustavi · Fintech · Blockchain · DeFi · Arhitektura plaćanja · Cloud-native sustavi · Distribuirani sustavi ## Naša lokacija - **Adresa**: Antuna Barca 7, 51000 Rijeka, Hrvatska - **Email**: contact@tdi.hr - **Telefon**: +385 (0)91 9411 859 --- ## Povezane stranice - [Početna](/hr) - [Usluge](/hr/usluge) - [Kako radimo](/hr/kako-radimo) - [Što gradimo](/hr/sto-gradimo) - [Kontakt](/hr/kontakt) - [Kalkulator](/hr/kalkulator) - [PMF](/hr/pmf-kalkulator) --- ## Razgovarajmo > Imate projekt na umu? Rado bismo čuli o njemu. Zakažite poziv ili nam pošaljite poruku. ## Zakažite besplatni poziv Najbrži način za početak. Recite nam o svom projektu i dat ćemo vam poštenu procjenu što je potrebno. ## Kontakt informacije - **Adresa**: Antuna Barca 7, 51000 Rijeka, Hrvatska - **Email**: contact@tdi.hr - **Telefon**: +385 (0)91 9411 859 ## Radno vrijeme - Ponedjeljak - Petak — 9:00 - 18:00 - Subota - Nedjelja — Zatvoreno --- ## Povezane stranice - [Početna](/hr) - [Usluge](/hr/usluge) - [Kako radimo](/hr/kako-radimo) - [Što gradimo](/hr/sto-gradimo) - [O nama](/hr/o-nama) - [Kalkulator](/hr/kalkulator) - [PMF](/hr/pmf-kalkulator) --- ## Transparentne cijene za dva načina suradnje s nama. > Transparentno cijenjenje za dva načina suradnje s TDI-jem: Fractional CTO retainer i hands-on sati. Trenutna procjena s detaljnom razradom. ## Usluge ### Fractional CTO Mjesečni retainer · strateško + tehničko vodstvo **Od $2,500 / mj** ### Hands-on Naplata po satu · kod, arhitektura, infra, AI, web3 **Od $150 / sat** ## Fractional CTO opsezi - **Strateško savjetovanje** (5h / tj) — Tehnološka strategija, pregledi arhitekture i izvršno vodstvo. - **Fractional vodstvo** (10h / tj) — Potpuno tehničko vodstvo uz upravljanje timom i strateško izvršavanje. - **Full CTO partnerstvo** (20h / tj) — Sveobuhvatne CTO odgovornosti uz izvještavanje na razini odbora. ## Hands-on vrste posla - **Full-stack razvoj** — Rails · TypeScript · React · Node · Next - **Infra i performanse** — AWS / GCP migracija · tuniranje DB · CI/CD - **Arhitektura i strategija** — Dizajn sustava · izbor tehnologije · pregledi - **AI / LLM integracija** — RAG · vektorske DB · agenti · LLM značajke - **Blockchain i DeFi** — Smart ugovori · multi-chain · Solidity *Procjene su indikativne. Konačna ponuda ovisi o opsegu, kadenci i očekivanjima on-calla.* --- ## Povezane stranice - [Početna](/hr) - [Usluge](/hr/usluge) - [Kako radimo](/hr/kako-radimo) - [Što gradimo](/hr/sto-gradimo) - [O nama](/hr/o-nama) - [Kontakt](/hr/kontakt) - [PMF](/hr/pmf-kalkulator) --- ## Saznajte imate li product-market fit u 60 sekundi. > Izmjerite product-market fit kroz dvostruki 0–7 metrički score i klasičnu Sean Ellis 40% anketu. Devtools benchmarks, Wilsonovi intervali pouzdanosti, segmentacija. Besplatno, dvojezično, sve u pregledniku. ## Usluge ### Compass 7 metrika · dvostruki 0–7 rezultat · devtools benchmarks ### Anketa Uvezi odgovore · Sean Ellis 40% · Wilson CI ## Dvije komplementarne metode, jedan alat. Survey mode koristi Sean Ellis test: ako ≥40% korisnika bi bilo "vrlo razočarano" da više ne mogu koristiti vaš proizvod, vjerojatno imate PMF. Najpoznatiji timovi koriste ovaj test da podignu rezultat iz dvadesetih u pedesete postotke u jednoj godini. Compass mode ocjenjuje 5 metrika ponašanja (TTFV, retencija, NRR, konverzija, organsko) protiv devtools-industrijskih benchmarka plus ARR-baziranog revenue stagea. Signal ispred prihoda = distribucijski problem; prihod ispred signala = rizik temelja. ## PMF razine (0–7) - **0** — Gradnja - **1** — Alpha - **2** — Beta - **3** — Trakcija - **4** — Rani PMF - **5** — Rast - **6** — Lider kategorije - **7** — Definer kategorije ## Česta pitanja. ### Koliko odgovora trebam? Okvirno koristan signal počinje oko 40 odgovora, pouzdani podaci iznad 100. Ispod 40 alat označava "nisku pouzdanost" i prikazuje širi Wilsonov 95% CI kako biste vidjeli buku u podacima. ### Zašto 40%, a ne 50%? Sean Ellis je empirijski izveo 40% iz ~100 startupa: firme koje prelaze 40% gotovo uvijek nalaze rast; one ispod gotovo uvijek muče se. Kalibrirano iz podataka, ne okrugli broj. ### Zašto "razočaran", ne "zadovoljan"? Framing gubitka otkriva ovisnost. Pozitivan framing poziva pristojnosnu pristranost — korisnici kažu da bi im nedostajao proizvod koji rijetko koriste. Razočaranje otkriva tko se zaista oslanja na vas. ### Radi li ovo za B2C? Survey mode radi za bilo koji proizvod. Compass mode benchmarks su devtools-specifični (bazirani na 37 firmi) — pa će buckets biti pomaknuti za consumer aplikacije. Koristite Compass kao okvir, ne kao bodovnu karticu. ### Je li NPS dovoljan? Ne. NPS mjeri namjeru preporuke; PMF mjeri ovisnost. Promoteri koji su također "vrlo razočarani" vaša su najvrednija kohorta — koristite oba i ukrstite ih. ### Napuštaju li moji podaci preglednik? Ne. Sve se računa u pregledniku. Linkovi za dijeljenje sadrže samo agregatne brojke — nikad sirove odgovore ankete ili CSV retke. ### Što ako imam samo 35 odgovora? Vidjet ćete značku "niska pouzdanost" i širi interval pouzdanosti. Tumačite oprezno; ponovno pokrenite kad dosegnete 100. NE gnjavite korisnike za odgovore — neodgovor je ugrađen u 40% benchmark. *Benchmarks su agregati iz devtools industrije. Okvirno, ne precizno — vaši rezultati će varirati.* --- ## Povezane stranice - [Početna](/hr) - [Usluge](/hr/usluge) - [Kako radimo](/hr/kako-radimo) - [Što gradimo](/hr/sto-gradimo) - [O nama](/hr/o-nama) - [Kontakt](/hr/kontakt) - [Kalkulator](/hr/kalkulator) ---