grok 4.6 // operator console

prod · stockholm

00:00:00Z

Hey, I'm

Yannis

Full-stack developer

I work on commerce and payments at BabyBjörn in Stockholm.

I occasionally write about agents and building software.

hello@yannis.dev
Yannis Stockholm, SE

Full-stack developer · Stockholm

Yannis.

Built with care.
From end to end.

I build interfaces, the systems behind them, and the connections in between. Currently working on commerce and payments at BabyBjörn.

Let’s talk Explore my work
Currently
BabyBjörnCommerce & payments
Building since
2017From Ethereum to everyday products
A highlight
ETH Denver ’23DAO & Community track winner

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 BabyBjörn · commerce
CH-02 ETH Denver 2023 winner
CH-03 Stockholm

01 / The toolkit

Stack

From the first interaction to the last API call. Tools I use to bring the whole product together.

Interfaces

TypeScript React Next.js React Native Tailwind TanStack Gatsby

Backend and data

Node.js Express REST APIs GraphQL MySQL Supabase

Platforms

Azure Functions Vercel Git Adyen Stripe

Web3

Solidity ethers.js Ethereum

02 / The process

Agents

I use agents for scoped work. I keep the final call.

Codex logo

Codex

Implementation

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

Claude Code logo

Claude Code

Architecture

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

Hermes logo

Hermes

Coordination

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

Cursor Cloud Automations logo

Cursor Cloud Automations

Background work

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

03 / The journey

Work

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

  1. BabyBjörn

    Full-stack

    Commerce, payments, and internal tools.

  2. Anotherblock

    Frontend

    Music-rights marketplace on Ethereum.

    ETH Denver

    Winner

    DAO & Community track among 600+ teams.

  3. Bonsai

    Founder

    Ethereum dashboard, then a wider portfolio tracker.

  4. Mindler

    Product engineering

    Early hire. Led the psychologist dashboard used by 200+ professionals.

  5. OnChain Jobs

    Co-founder

    Hiring product for blockchain companies.

  6. HashDrop

    First code

    Started with Ethereum. Built a site for tracking token launches.