Open to opportunities

William Wong

@williamwong2

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Senior Full-Stack Engineer delivering scalable, high-performance web and cloud-native solutions.

Sweden

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What I'm looking for

I seek technical leadership roles where I can build scalable full-stack systems, drive cloud-native adoption, and mentor teams in agile, collaborative environments.

I am a Senior Full-Stack Engineer with nine years of experience building high-performance, scalable, and maintainable software across startups and enterprise clients. I focus on bridging product vision with technical execution to deliver measurable business value.

I design and implement RESTful and GraphQL APIs, microservices, and real-time applications using React.js, TypeScript, and Node.js, prioritizing developer experience and system evolvability.

I champion cloud-native architectures and DevOps practices—CI/CD, infrastructure-as-code, automated testing—and have implemented solutions using AWS, Firebase, Docker, and Kubernetes to drive digital transformation.

My work emphasizes accessibility, performance optimization, and secure authentication flows; I consistently raise code quality through testing frameworks and collaborative, agile delivery across distributed teams.

Experience

Work history, roles, and key accomplishments

Senior Full Stack Engineer

BRYTER GmbH

Aug 2023 - Jul 2025 (1 year 11 months)

Embedded as a strategic technical consultant and architected high-performance React/TypeScript and Node.js applications, improving developer experience with REST/GraphQL APIs and boosting UI performance through front-end optimizations.

React TypeScript Node GraphQL WebSockets AWS Firebase Jest Cypress

Senior Full Stack Developer

Valtech

Nov 2021 - Jul 2023 (1 year 8 months)

Engineered end-to-end React and Node.js solutions and designed microservices aligned with MACH principles, optimizing database performance and implementing secure OAuth/JWT authentication flows.

React Node Microservices PostgreSQL MongoDB Redis OAuth JWT CI CD

Full Stack Developer

TRIARE, LLC

Mar 2018 - Oct 2021 (3 years 7 months)

Architected and deployed scalable full-stack applications using React, Node.js, and MongoDB, integrated payment and social login services, and managed CI workflows with Docker and AWS.

React Node MongoDB Docker AWS CI CD Performance Optimization

Frontend Developer

Dwellir AB

Jul 2015 - Feb 2018 (2 years 7 months)

Developed blockchain-integrated front-end applications using React and Web3.js, integrated Ethereum smart contracts, and built real-time dashboards for blockchain analytics.