ERPLY
Built the full invoice module within a micro-frontend architecture.
React.jsTypeScriptMicro-frontends
Available for work
Dennis Kumar
Senior Full-Stack Developer · React · Flutter · TypeScript
I build production-grade web and mobile products from scratch. 8+ years across fintech, iGaming, and e-commerce. Based in Tallinn, Estonia.
About
I'm a Senior Full-Stack Developer with 8+ years of experience building consumer-facing web and mobile products. My core stack is React/TypeScript and Flutter— I've shipped real-money casino game clients at Yolo Group and built fintech apps from scratch, including SlickBills, a live invoicing and payment app for the Baltic market.
I care about clean architecture and design patterns — not just getting things to work, but building systems that stay maintainable as they scale. I actively use AI tooling (Cursor, Copilot, Claude) to move fast without cutting corners on quality.
Commercial Experience
Ampwise AI
Created the first working MVP using OpenAI's API and email monitoring/parsing.
React.jsTypeScriptExpressOpenAI
Morek.eu
Built the products page for customers to inquire for electrical components straight from Morek.
Next.jsTypeScriptAzure Cloud
Yolo Live88
Created the Timers service being used in live casino games.
TypeScriptReact.jsRedux
Yolo Original Games
Built the original mobile casino game experience, including Blackjack.
FlutterDart
Based in Tallinn, Estonia. Open to senior roles locally or remote.
Projects
Things I've built outside of work.
SlickBills
activeFintech app for sending and receiving day-to-day invoices via username or QR. Features Gmail integration with automatic invoice parsing. Integrating EU stablecoin infrastructure (EURC) for in-app payments.
FlutterSupabaseEdge FunctionsNode.jsReact.js
Visit site →
Klubiq
activeCommunity and membership platform for managing clubs, events, and member engagement in one place.
Next.jsTypeScriptSupabase
Visit site →
CourtSync
activeTournament management app for racquet sports with real-time match tracking, bracket management and live score updates.
FlutterSupabaseBLoC
Visit site →
SnapStake
activeSocial challenge and peer-to-peer betting app with a moment-reveal mechanic. Users stake on personal challenges proven via in-app camera.
FlutterSupabase
Visit site →Viblix
archivedHandcraft marketplace connecting indie artists with buyers. Supports artist storefronts and curated product discovery — no dropshipping, no POD.
Next.jsSupabaseTypeScript
Radiun
archivedMusic discovery app using a swipe-based format for underground artists, with 15 - 30 second samples linked to artist monetization platforms.
FlutterFirebase
Skills
Technologies and tools I work with.
Frontend
ReactTypeScriptNext.jsReduxZustandCSS/SASSMicro-frontends
Mobile
FlutterDartReact NativeBLoCRiverpodGetX
Backend & Infra
Node.jsSupabaseFirebasePostgreSQLREST APIsEdge Functions
Tools & Practices
GitCI/CDDesign PatternsCode ReviewAgile/Scrum
AI Tooling
CursorCopilotClaudeChatGPTPrompt Engineering
Let's talk
Open to senior React, Flutter, or Full-Stack roles in Tallinn or remote. If you're building something serious, reach out.