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About Experience Projects Skills Contact
Available for new opportunities

Kuilin HE

Senior Software Engineer

Building scalable systems and elegant user experiences. Passionate about clean code, performance optimization, and creating products that make a difference.

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About Me

I'm a Senior Software Engineer with 8+ years of experience building high-performance web applications and distributed systems. Currently, I lead backend development at a Series B startup, where I've helped scale our platform to handle millions of daily requests.

Previously, I spent 4 years at Stripe working on payment infrastructure, and earlier in my career, I was a frontend engineer at Google. I love solving complex problems and mentoring junior developers.

When I'm not coding, you'll find me contributing to open source, writing technical articles, or exploring new technologies.

Full-Stack Development

End-to-end development from architecture to deployment. Strong expertise in React, Node.js, and cloud infrastructure.

System Design

Building scalable, fault-tolerant systems. Experience with microservices, caching strategies, and database optimization.

Technical Leadership

Mentoring teams, establishing coding standards, and driving architectural decisions across multiple products.

Experience

Work Experience

A timeline of my professional journey building products at scale

Senior Software Engineer, Backend
Streamline Technologies
2022 — Present
  • Led the design and implementation of a real-time data processing pipeline handling 10M+ events daily
  • Reduced API response times by 60% through database query optimization and caching layer implementation
  • Mentored 4 junior engineers, establishing code review standards and conducting technical interviews
  • Architected a microservices migration that improved system reliability from 95% to 99.9%
Software Engineer
Stripe
2018 — 2022
  • Built and maintained core payment APIs processing $2B+ in annual transaction volume
  • Implemented fraud detection features that reduced fraudulent transactions by 40%
  • Contributed to Stripe's open-source libraries with 500+ GitHub stars
  • Led the migration from monolithic architecture to microservices, improving deployment velocity by 3x
Software Engineer, Frontend
Google
2016 — 2018
  • Developed user-facing features for Google Cloud Console used by 2M+ developers
  • Improved page load times by 45% through code splitting and lazy loading implementations
  • Created component libraries adopted by 15+ teams across the organization
Projects

Featured Projects

A selection of projects I've worked on, from concept to production

🚀

DevMetrics

Real-time developer productivity analytics dashboard with team performance tracking and automated reporting. Integrates with GitHub, Jira, and Slack.

React TypeScript PostgreSQL GraphQL
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⚡

CacheFlow

Distributed caching library for Node.js applications with automatic cache invalidation and built-in rate limiting. 10M+ weekly npm downloads.

Node.js Redis TypeScript Docker
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🎨

DesignTokens

Type-safe design token management system for maintaining consistency across design and engineering. Supports Figma, CSS, and React Native.

React Figma API CSS CI/CD
View Project →
📊

APIWatch

Comprehensive API monitoring and alerting platform with anomaly detection and custom health checks. Deployed to 200+ companies.

Go React Kubernetes Prometheus
View Project →
Skills

Skills & Technologies

Tools and technologies I work with regularly

Frontend

React TypeScript Next.js Vue.js CSS/SCSS Tailwind

Backend

Node.js Python Go PostgreSQL MongoDB GraphQL

Tools & DevOps

Git Docker Kubernetes Terraform CI/CD Linux

Cloud & Platform

AWS GCP Redis Kafka Firebase Vercel
Contact

Get in Touch

I'm always open to discussing new opportunities and interesting projects

he@kuilin.dev