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Senior Full Stack Engineer with 10+ years of experience building and scaling production web platforms across e-commerce, global healthcare, and AI-driven products. Experienced in owning systems end-to-end—from frontend architecture and backend services to cloud deployment and production operations. Proven ability to deliver reliable, high-performance systems in fully remote, distributed teams, and to translate complex requirements and emerging technologies into maintainable, user-focused solutions. Based in Finland, open to global remote opportunities.…Senior Full Stack Engineer with 10+ years of experience building and scaling production web platforms across e-commerce, global healthcare, and AI-driven products. Experienced in owning systems end-to-end—from frontend architecture and backend services to cloud deployment and production operations. Proven ability to deliver reliable, high-performance systems in fully remote, distributed teams, and to translate complex requirements and emerging technologies into maintainable, user-focused solutions. Based in Finland, open to global remote opportunities.

Ken Chen

Full Stack Developer, Front-End Developer, Web Developer

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Senior Full Stack Engineer with 10+ years of experience building and scaling production web platforms across e-commerce, global healthcare, and AI-driven products. Experienced in owning systems end-to-end—from frontend architecture and backend services to cloud deployment and production operations. Proven ability to deliver reliable, high-performance systems in fully remote, distributed teams, and to translate complex requirements and emerging technologies into maintainable, user-focused solutions. Based in Finland, open to global remote opportunities.…Senior Full Stack Engineer with 10+ years of experience building and scaling production web platforms across e-commerce, global healthcare, and AI-driven products. Experienced in owning systems end-to-end—from frontend architecture and backend services to cloud deployment and production operations. Proven ability to deliver reliable, high-performance systems in fully remote, distributed teams, and to translate complex requirements and emerging technologies into maintainable, user-focused solutions. Based in Finland, open to global remote opportunities.

Available to hire

Senior Full Stack Engineer with 10+ years of experience building and scaling production web platforms across e-commerce, global healthcare, and AI-driven products. Experienced in owning systems end-to-end—from frontend architecture and backend services to cloud deployment and production operations. Proven ability to deliver reliable, high-performance systems in fully remote, distributed teams, and to translate complex requirements and emerging technologies into maintainable, user-focused solutions.
Based in Finland, open to global remote opportunities.

Skills

Experience Level

Expert

Expert

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Intermediate

Intermediate

Intermediate

Intermediate

Work Experience

Senior Software Engineer at Anthropic

January 1, 2021 - Present

Designed and delivered production-grade AI-powered features by integrating large language model APIs into React/TypeScript frontend and Node.js backend services. Led end-to-end delivery of AI-driven features used by internal and external teams, improving workflow efficiency and decision-making speed by 40%. Built scalable REST and real-time APIs supporting low-latency AI inference and collaborative workflows. Worked closely with ML researchers and product teams to operationalize experimental AI capabilities into stable, user-facing applications. Improved system performance and robustness through asynchronous processing, caching, and performance tuning. Mentored junior engineers and promoted clean code and best practices.

Frontend Engineer at Wolt

January 1, 2015 - January 1, 2018

Built and scaled customer-facing web applications for a high-growth e-commerce platform, serving thousands of daily users. Implemented responsive, high-performance UI components using modern JavaScript frameworks, collaborating with designers and backend engineers to deliver pixel-perfect, production-ready interfaces under tight release cycles. Optimized frontend performance through code splitting, asset optimization, and performance tuning, reducing page load times by 25%+.

Full Stack Engineer at Philips HealthCare

January 1, 2018 - January 1, 2021

Developed and maintained secure, cloud-based health care applications used by global clinical and operational teams. Built full-stack features using React, Node.js, and PostgreSQL, supporting secure, real-time data access across distributed health care systems. Designed and maintained RESTful APIs and backend services handling sensitive data in compliance with security and privacy requirements. Improved system performance and reliability via query optimization, caching strategies, and frontend performance tuning, reducing load times by 30%+. Collaborated with cross-functional teams across multiple time zones to deliver production features in a fully remote, global environment. Contributed to modernization by refactoring legacy components into scalable, maintainable services.