Joze Kosmerl

I turn ideas into products people actually use.

8 years building in Beijing and Shanghai. I've taken crypto platforms to $200M in assets, shipped a Solana L2 from scratch, and built enterprise systems across APAC — mostly by showing up before there was anything to show up to.

Photo of Joze Kosmerl
01

What I Bring

0-to-1 Builder

I've done this three times: Iconomi went from nothing to $200M in managed crypto assets. Select grew from zero to 10k active users. Sonic went from a whiteboard to a stable Solana L2 in under a year. I don't just join early — I make early work.

China + West Bridge

Eight years in Beijing and Shanghai gave me something most engineers don't have: real fluency in how China's tech ecosystem operates. Working Mandarin, dual-cluster Kubernetes across the Great Firewall, and the cultural context to make cross-border products actually work.

Full-Stack Depth

I've written Solidity smart contracts and managed Kubernetes service meshes. Built real-time systems in Elixir and shipped React Native apps. When I say full-stack, I mean from the infrastructure up to the pixel.

Crypto / Web3 Native

I've been in crypto since 2016 — before most people knew what a smart contract was. Built on EVM and Solana, shipped exchanges and L2s, handled NFTs and wallets. This isn't a pivot for me. It's where I've been.

02

The Short Version

I built products in a tech ecosystem most Western engineers only read about.

I'm from Slovenia, a small EU country. I studied Electronics and Telecommunications at the University of Ljubljana, published a paper at IEEE, and I spent the last eight years working in China.

Beijing and Shanghai became home. I picked up working Mandarin (HSK6), navigated the Great Firewall, and built products in a tech ecosystem most Western engineers only read about — crypto platforms, social apps, Solana L2 infrastructure, enterprise order management, and custom AI agents.

I'll reach for whatever technology the problem demands. I'm interested in AI-centered workflows, building my own products, and working with teams that need someone who's done the 'we have nothing, make it real' thing a few times.

EN English (Native) ZH 中文 (Working) SL Slovenščina (Native)
03

Where I've Built

  1. Estee Lauder · Senior Software Engineer

    2024 – 2026 · Remote

    Leading the Order Management backend for APAC — the system that gets orders from cart to doorstep across the region. Built a product recommendation AI agent, designed gRPC APIs, and manage multi-region Kubernetes infrastructure.

    • Elixir
    • gRPC
    • Kubernetes
    • RabbitMQ
    • AI Agents
  2. Sonic SVM · Lead Engineer

    2022 – 2024 · Beijing

    Joined when Sonic was basically a pitch deck and a Slack channel. Built the entire backend and infrastructure — EKS clusters, Istio mesh, CI/CD, monitoring, node infrastructure. Shipped a stable Solana L2 in about a year.

    • Solana
    • Elixir
    • Go
    • Kubernetes
    • Istio
    • Python
  3. Select · Lead Engineer (Part-time)

    2018 – Present · Beijing

    A social platform I've been building since 2018. Real-time messaging, recommendation engine, mobile apps, and the fun challenge of serving users on both sides of the Great Firewall with dual Kubernetes clusters.

    • Elixir
    • Go
    • React Native
    • Kubernetes
    • Python
  4. Energolabs · Senior Engineer

    2017 – 2018 · Shanghai

    Blockchain energy trading in Shanghai. Built a decentralized order book exchange on Ethereum, deployed a private PoA network, and managed the validator cluster.

    • Ethereum
    • Solidity
    • Kubernetes
    • Node.js
    • React Native
  5. Iconomi · Senior Engineer

    2016 – 2017 · Slovenia

    Got in at the very beginning. Helped run the ICO that raised $10M in three months, then built the trading engine that powered the platform's growth to $200M in managed assets.

    • Java
    • Node.js
    • PostgreSQL
    • React
  6. Cloudmondo · Backend Engineer

    2014 – 2016 · Slovenia

    My first engineering job. Backend services for a mesh WiFi management platform — event-driven architecture, real-time data collection, and the distributed systems work that shaped how I think about infrastructure.

    • Node.js
    • Cassandra
    • RabbitMQ
    • AngularJS
04

Projects

01

A study app for Mandarin learners preparing for HSK exams. Built it for myself while grinding through vocabulary in Beijing — turns out other people needed it too.

02

China Tech Intel

In Development

An AI-powered newsletter that translates and contextualizes China's tech landscape for Western developers and investors. Pulling from Chinese-language sources most people can't access.

03

A social platform bridging communities across the Great Firewall. Built with Elixir, React Native, and strong opinions about what social media should actually be.

05

Got something to build?

I'm open to technical leadership, co-founder roles, and consulting — especially if you're bridging China and the West or need someone who's done the zero-to-one thing before. Even if it's just a conversation, I'm always happy to talk.