Open to opportunities

Yannis Chen

@yannischen

Message

Senior full-stack engineer building scalable AI-enabled fintech platforms across frontend to backend.

Ireland

Message

What I'm looking for

I’m looking for a senior full-stack role in fintech or AI platforms where I can own end-to-end delivery, build scalable services, and ship AI-enabled workflows—preferably in a collaborative remote Europe team.

I’m a Senior Full Stack Engineer with 10 years of experience building scalable web applications, AI-enabled products, and fintech systems across startup and scale-up environments. I’m known for greenfield development, cross-functional execution, and owning end-to-end delivery across frontend, backend, APIs, data, and platform infrastructure.

Most recently at Stability AI, I re-architected core platform services to scale concurrent users from ~10K to 100K+, cut API latency by ~30–40%, and improved uptime to 99.9%+. I also delivered AI-assisted classification and decision-support workflows using Python and LLM-based services, reducing manual review effort by ~30%. Earlier at Fast, I designed and shipped greenfield product modules that improved successful user completion by 19% and reduced recurring integration issues by 27%, and at Inflazome I helped build the first generation of the product as a founding engineer in React/Node.js.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Stability AI

May 2022 - Present (4 years)

Re-architected core platform services to scale concurrent users from ~10K to 100K+, reducing API latency by ~30–40% and improving uptime to 99.9%+. Delivered AI-assisted classification and decision-support workflows, cutting manual review effort by ~30%, and built fintech workflow services supporting SEPA/PSD2/Open Banking and KYC/AML with ~30% higher processing throughput.

React TypeScript Python PostgreSQL Redis Docker AWS Microservices

Senior Software Engineer

Fast

Jan 2020 - Apr 2022 (2 years 3 months)

Built core checkout and transaction workflows, shipping greenfield React/Node.js modules that increased successful user completion by 19%. Developed C#/.NET backend services for transaction and partner integrations, reducing recurring integration issues by 27%, while expanding architecture ownership and improving engineering delivery speed by 24%.

React TypeScript Node PostgreSQL AWS C# .NET REST APIs System Design API Architecture Performance Optimization

Founding Engineer

Inflazome

Jul 2016 - Dec 2019 (3 years 5 months)

Joined as an early engineer and helped build the first generation of the product using React/JavaScript and Node.js, delivering user-facing product flows and backend services. Built REST integrations with Node.js and PostgreSQL to support core application workflows, improve data consistency, and establish the company’s technical foundation.