Alex Chen
Senior Software Engineer
// Summary
Senior Software Engineer with 8+ years of experience building scalable web applications and distributed systems. Proven track record of leading cross-functional teams, improving system performance by up to 60%, and delivering products used by millions. Passionate about clean architecture, developer experience, and open-source contributions.
// Experience
Senior Software Engineer
Mar 2021 — PresentStratos Technologies @ San Francisco, CA
Lead a team of 6 engineers in building a real-time data processing platform serving 2M+ daily active users. Architected and implemented a microservices migration from a monolithic Rails application, reducing deployment times by 75% and improving system reliability to 99.95% uptime. Designed a GraphQL API layer that unified 12 internal services, reducing frontend data-fetching complexity by 40%. Mentored 4 junior engineers through structured code reviews, pair programming sessions, and technical workshops.
Software Engineer II
Jun 2018 — Feb 2021NovaPay @ San Francisco, CA
Built and maintained payment processing microservices handling $50M+ in monthly transactions using Node.js, TypeScript, and PostgreSQL. Implemented a fraud detection pipeline using event-driven architecture with Kafka, reducing fraudulent transactions by 35%. Developed a comprehensive CI/CD pipeline with GitHub Actions, achieving 95% test coverage and cutting release cycles from 2 weeks to 2 days. Collaborated with product and design teams to launch a merchant dashboard that increased self-service onboarding by 60%.
Junior Software Engineer
Jul 2016 — May 2018BrightLoop Inc. @ Mountain View, CA
Developed responsive web applications using React, Redux, and TypeScript for an ed-tech platform serving 500K+ students. Built RESTful APIs with Express.js and integrated third-party services including Stripe, Twilio, and SendGrid. Optimized database queries and implemented caching strategies with Redis, reducing page load times by 45%. Participated in agile ceremonies and contributed to sprint planning, retrospectives, and architecture decision records.
// Skills
// Languages
English: Native
Mandarin Chinese: Fluent
Japanese: Intermediate
// Certifications
AWS Certified Solutions Architect – Professional — Amazon Web Services (Apr 2023)
Google Cloud Professional Cloud Developer — Google Cloud (Sep 2022)
// Education
Master of Science in Computer Science
Sep 2014 — Jun 2016Stanford University, Stanford, CA
Specialization in Distributed Systems and Machine Learning. Thesis on optimizing container orchestration in cloud-native environments. GPA: 3.9/4.0.
Bachelor of Science in Computer Science
Sep 2010 — May 2014University of California, Berkeley, Berkeley, CA
Dean's List all semesters. Teaching Assistant for Data Structures and Algorithms. Active member of the ACM student chapter. GPA: 3.7/4.0.
// Projects
QueryForge
https://github.com/alexchendev/queryforge · Jun 2021 · Aug 2022
A type-safe SQL query builder for TypeScript with compile-time validation and auto-generated migrations. Featured on Hacker News with 1.2K+ GitHub stars.
TypeScript, PostgreSQL, SQL, Developer Tools
OpenTracer
https://github.com/alexchendev/opentracer · Jan 2022
An open-source distributed tracing library for Node.js microservices with automatic instrumentation and minimal performance overhead. Used by 200+ companies in production.
TypeScript, Node.js, OpenTelemetry, Distributed Systems
Software Engineer
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