BLCKSNext.js
Flinkit
AI-powered outdoor team-building platform.
Built features across the stack and took it from concept to public launch.
Reached #2 in Product Hunt's daily ranking.
- Next.js
- TypeScript
- NestJS
- AI
Open to mid-level full-stack and forward deployed engineer rolesBudapest · remote / hybrid (EU)
Tamás Krisztián Kálmán
I build AI-powered products end to end.
Full-stack engineer in Budapest. For the past two years I've built production software for enterprise clients — voice AI in healthcare, a travel app with 100,000+ downloads, and a product that reached #2 on Product Hunt.
Clients and products I've shipped for
- SYNLAB
- RMC
- Xmed360
- Wingman
- Flinkit
- Propertizer
- downloads on apps I shipped
- 100k+
- Product Hunt daily ranking
- #2
- client projects, different stacks
- 5
- junior → mid-level
- 2 yrs
Stack
The tools I ship production software with.
Claude
Cursor
Budapest, HU
01About Me
Full-stack engineer in Budapest, focused on AI products.
I'm a full-stack engineer based in Budapest. For the past two years I worked at BLCKS, a Clutch Top 100 software agency, moving between five client projects with completely different stacks and business domains — voice AI in healthcare, a proptech platform, a travel app with a large live user base.
That variety is the part I'm good at: landing in an unfamiliar codebase or domain, getting to a working solution quickly, and talking to the people who actually need the thing built. I joined as a junior and was promoted within two years.
Reference
Based on his experience so far, his fast learning and his independence, I consider Tamás suited to both mid-level software engineer and forward deployed engineer roles. He performs particularly well in AI-related development environments where high-quality technical delivery has to be combined with quickly understanding business and client needs, adapting to changing requirements, and shipping working solutions fast. I recommend him without reservation as a reliable, committed and fast-developing professional.
Péter Ercsey-OrbánManaging Director, BLCKS Software Kft.
Full reference letter (PDF)02Experience
Two years of client work, five projects, three stacks.
Oct 2024 — Jul 2026
BLCKS Software Kft.
Full-Stack Software Engineer (junior → mid-level)
- Built AI voice and speech-technology systems for enterprise healthcare and service clients (SYNLAB, RMC, Xmed360) — backend integration and the client-facing interfaces on top. Angular, NestJS, Azure.
- Developed Flinkit, an AI-based outdoor team-building product, from concept to public launch. Reached #2 in Product Hunt's daily ranking.
- Shipped production features for Wingman, a travel app with 100,000+ downloads, inside an existing large-scale codebase with a live user base.
- Delivered full-stack features for Propertizer, an award-winning proptech platform, under frequently changing business requirements.
- Moved between five client projects with different stacks and domains, picking up new frameworks in days — recognised with an early promotion to mid-level.
Feb 2024 — Present
Freelance
Full-Stack Software Engineer
- Deliver complete web applications as sole developer — API design, data modelling, frontend and production deployment. React, TypeScript, Next.js, MongoDB, Firebase, Stripe, Vercel.
- Build admin dashboards with full CRUD, payment flows and content management for revenue-generating products.
- Implement frontends for AI platforms: REST integrations and AI chat interfaces built from Figma designs.
- Run a live bilingual (HU/EN) Shopify storefront end to end, and shipped React Native mobile features after self-teaching the framework in weeks.
03Projects
Selected work — what I built, who for, and what came of it.
BLCKSFlutter
Wingman
Travel companion app with a large live user base.
Shipped production features inside an established codebase alongside a full team.
100,000+ downloads.
- Flutter
- REST APIs
BLCKSAngular
Voice AI — SYNLAB, RMC, Xmed360
Voice and speech-technology systems for healthcare and service providers.
Built the backend integrations and the client-facing interfaces on top of them.
Delivered for three enterprise clients.
- Angular
- NestJS
- Azure
- Speech AI
BLCKSAngular
Propertizer
Proptech platform for property management workflows.
Delivered full-stack features under frequently changing requirements.
Award-winning platform.
- Angular
- NestJS
2024React
MedinetAI
Medical platform generating diagnosis suggestions from patient symptoms.
Built the full frontend from Figma designs — every REST integration and the AI chat interface.
- React
- TailwindCSS
- REST APIs
- AI chat
2024Next.js
KalandJáték
Story-driven city-exploration web game, built solo.
Everything: game logic, admin dashboard, purchases, gift codes, city CRUD, reviews, deployment.
- Next.js
- TypeScript
- MongoDB
- Firebase
- Stripe
- Vercel
Shopify
ColorSport
Live bilingual swimwear e-commerce store.
Own the storefront end to end — custom sections, HU/EN theme logic, localized checkout UX.
Running in production at colorsport.hu.
- Shopify
- Liquid
2024React Native
PawControl
Pet-tracking app for iOS and Android.
Owned the mobile frontend: live map, location alerts, battery status. Learned React Native and shipped features within weeks.
- React Native
- Tamagui
- OpenStreetMap
2024React
Shadow Solutions
Multi-theme page-builder platform for marketing sites.
Built the responsive frontend that lets admins compose pages from reusable sections and switch site-wide themes.
- React
- Strapi CMS
2024React
David Teleki tattoo art
Landing page for a tattoo artist.
Designed and built the portfolio, booking contact flow and social links.
- React
- Next.js
2024React
HowIsYourBrand
Marketing site for a web and design agency serving SMBs.
Built the services, portfolio and contact pages.
- React
- TailwindCSS
04Contact
Looking for a mid-level full-stack or forward deployed engineer?
I'm open to roles in Budapest or remote within the EU, and to selected freelance work. Tell me what you're building and I'll tell you honestly whether I'm a fit.