grok 4.6 // operator console

prod · stockholm

00:00:00Z

Hey, I'm

Yannis

Full-stack developer

I'm a full-stack developer in Stockholm. I build web and mobile products with TypeScript, React, and Node.js.

At BabyBjörn, I work on commerce, payments, and internal tools. Earlier work spans medtech, Web3, and an ETH Denver win among 600+ teams.

5+ years in product teams Commerce, medtech, Web3 ETH Denver 2023 winner Born in Antibes. Based in Stockholm.

GPT-5.6 Sol High

Synthesis complete

Subject / full-stack developer

Yannis

Full-stack developer

Best answer

A product-minded engineer who turns ambiguous ideas into durable software, then keeps the final decisions human.

01 Product range

Web, backend, mobile, payments

02 Builder instinct

Founder work to production teams

03 AI posture

Fast execution, human final call

Working set

CurrentBabyBjörn commerce

SignalETH Denver winner

OriginEthereum, 2017

Inspect the capability map below

Claude Opus 5

Abstract

The path is clear: Ethereum experiments, early medtech work, a music NFT marketplace, an ETH Denver win, and full-stack commerce at BabyBjörn.

Premise Products over demos
Method Reason first, then build
Range Medtech, commerce, onchain

Eight years, six teams, three industries.

Kimi K3

ctx 2,000,000 / 2,000,000

Context window 2M tokens
Time in orbit 7+ years
Guidance Agents, human taste

Full-stack developer human in the loop live

live-build pkt 00412
  1. whoami Yannis. Full-stack. Stockholm. Not a brand deck.
  2. uptime 2017 → now. Ethereum first, then product teams.
  3. job --current BabyBjörn · commerce, payments, internal tools
  4. grep receipts ETH Denver 2023 · DAO track · 600+ teams
  5. agents --policy Scoped diffs. Human taste. No autopilot.
signal 0.92
noise 0.11
agency MAX
latency 12ms
CH-01 5+ years in product teams
CH-02 Commerce, medtech, Web3
CH-03 ETH Denver 2023 winner
CH-04 Born in Antibes. Based in Stockholm.

Stack

Tools I use

TypeScript, React, Node.js, APIs, cloud delivery, and Web3 when it fits.

Interfaces

01
TypeScript React Next.js React Native Tailwind TanStack Gatsby

Backend and data

02
Node.js Express REST APIs GraphQL MySQL Supabase

Platforms

03
Azure Functions Vercel Git Adyen Stripe

Web3

04
Solidity ethers.js Ethereum

AI workflow

How I work with agents

I use coding agents for scoped implementation, review, and repeatable tasks. I keep the architecture, taste, and final call human.

  • Use AI to move faster, not to check out.
  • Keep scopes small and context clear.
  • Automate chores, own the decisions.
Codex logo

Codex

Implementation agent

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

Claude Code logo

Claude Code

Architecture pair

Architecture passes, refactors, reviews, and long-context debugging.

Hermes logo

Hermes

Workflow coordination

Project memory and handoffs so agent work stays tied to the brief.

Cursor Cloud Automations logo

Cursor Cloud Automations

Background execution

Queued fixes and background tasks while I review the decisions that matter.

Timeline

Work so far

From self-taught Ethereum projects to product work in medtech, commerce, and Web3.

  1. BabyBjörn, full-stack developer

    2024 - present

    Building across the commerce platform: APIs, serverless functions, frontend work, payments, and internal tools.

    React TypeScript Node.js Azure Adyen

  2. Anotherblock

    Music NFT marketplace

    Built React surfaces for a music NFT marketplace connected to Ethereum contracts, ethers.js, and GraphQL data.

    React GraphQL ethers.js Web3

    ETH Denver winner

    DAO & Community track

    Won the DAO and Community track among 600+ teams with an on-chain knowledge tool.

    Hackathon Product On-chain data

    Bonsai pivot

    Portfolio tracking

    Moved Bonsai from a Web3 dashboard toward portfolio tracking across 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, the first version of Bonsai.

    Ethereum NFTs Dashboard

  4. Mindler

    First full-time developer role

    Joined early at Mindler, 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 and React Native features with production teams.

    React Redux React Native

    SALT full-stack bootcamp

    Stockholm

    Completed a full-stack JavaScript program focused on mob programming and web development.

    JavaScript Full-stack Agile

  5. OnChain Jobs

    Co-founder

    Co-founded a hiring product for blockchain companies while learning JavaScript through real product work.

    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

open channel — skip the pitch, send the signal

Contact

hello@yannis.dev