Summary
Samuli Lehtonen is a Senior Full Stack Developer with 11 years of experience building production web applications, currently focused on frontend design systems, performance and accessibility at Agoda. He specializes in JavaScript ecosystems—React, TypeScript and Node.js—and has driven A/B testing integrations and cross-consumer component work at scale. His background includes full stack roles at Hoxhunt and Sanoma, and earlier PHP/JS work, giving him a pragmatic end-to-end perspective from backend microservices to polished UIs. He holds an MSc in Computer Science from the University of Helsinki, has studied in Hong Kong and China, and is legally able to work across the EU and Hong Kong via a top-talent pass. Colleagues describe him as a curious engineer who started with game server emulators as a teen, a detail that helps explain his long-term interest in systems that blend performance with user-facing polish.
11 years of coding experience
5 years of employment as a software developer
Chinese Language and Literature, Chinese Language and Literature at Renmin University of China
Master of Science - MS Computer Science, Master of Science - MS Computer Science at University of Helsinki
The University of Hong Kong (HKU)
Finnish, English, Chinese, Swedish, Thai