Hey, I'm

Yannis

Full-stack developer

I build production web apps across frontend, backend, and mobile, mostly with TypeScript, React, Node.js, and agentic workflows.

5+ years shipping product Medtech, e-commerce, Web3 ETH Denver 2023 winner Antibes-born, Stockholm-based

Core stack

Production tools I reach for

A focused stack for modern product work: typed interfaces, pragmatic APIs, cloud delivery, and Web3 when it adds real leverage.

Product interfaces

01
TypeScript React Next.js React Native Tailwind Material UI Gatsby

Backend and data

02
Node.js Express REST APIs GraphQL MySQL Supabase

Platforms and delivery

03
Azure Functions Vercel Git Adyen

Web3 and experiments

04
Solidity ethers.js Ethereum

How I ship with AI

Agentic workflow stack

I use AI agents as a development loop: plan with context, split work into focused agents, review the diffs, and automate the repeatable parts without losing engineering judgement.

  • AI for acceleration, not abdication.
  • Small agents, clear context, reviewed output.
  • Automate the repeatable parts; keep taste and responsibility human.
Codex logo

Codex

Implementation agent

Codebase-aware changes, bug fixes, tests, and PR-ready iterations inside real repositories.

Claude Code logo

Claude Code

Deep reasoning pair

Architecture passes, refactors, code reviews, and long-context problem solving when the shape is still forming.

Hermes logo

Hermes

Workflow coordination

Project memory, handoffs, and lightweight orchestration so agent work stays connected to intent.

Cursor Cloud Automations logo

Cursor Cloud Automations

Background execution

Async chores, queued fixes, and automation runs that keep momentum while I review the important decisions.

Path so far

Developer journey

A compressed path from self-taught Web3 experiments to production product work in medtech, e-commerce, and AI-assisted engineering.

  1. BabyBjörn — Full-stack developer

    2024 - present

    Building across the e-commerce platform: backend APIs, serverless functions, frontend features, payments, and internal developer workflows.

    React TypeScript Node.js Azure Adyen

  2. Anotherblock

    Music NFT marketplace

    Built frontend experiences that connected Ethereum smart contracts, ethers.js, and GraphQL-backed marketplace data.

    React GraphQL ethers.js Web3

    ETH Denver winner

    DAO & Community track

    Won among 600+ teams with a knowledge management tool using Notion-like commands for on-chain data.

    Hackathon Product On-chain data

    Bonsai pivot

    Portfolio tracking

    Reframed Bonsai from a Web3 dashboard into a broader portfolio tracker for crypto, stocks, real estate, and collectibles.

    Founder Product strategy Finance

  3. Bonsai Finance pre-alpha

    Web3 dashboard

    Launched an early Ethereum asset and NFT dashboard that later evolved into a broader portfolio product.

    Ethereum NFTs Dashboard

  4. Mindler

    First full-time developer role

    Joined early at a medtech startup, worked across web and mobile, and led the psychologist dashboard used by 200+ professionals.

    React Node.js React Native Medtech

    Podme and Redmind internships

    First production teams

    Built podcast analytics tooling, React Native features, and got hands-on experience shipping with real product teams.

    React Redux React Native

    SALT full-stack bootcamp

    Stockholm

    Completed an intensive full-stack JavaScript program focused on mob programming, agile delivery, and modern web development.

    JavaScript Full-stack Agile

  5. OnChain Jobs

    Co-founder

    Co-founded a hiring product for blockchain companies and used it as a real-world path into JavaScript and product building.

    Founder Blockchain JavaScript

  6. Smart contracts and first code

    Self-taught start

    Started programming after discovering Ethereum and built HashDrop, a site for tracking token launches.

    Ethereum Solidity Self-taught

Contact Me

Get in touch via this form or contact me directly at hello@yannis.dev