CLChenglin Liu
@chenglinliu
Senior software engineer specializing in scalable backend systems, cloud architecture, and API design.
United StatesWhat I'm looking for
I am a senior software engineer with over 10 years of experience designing and implementing high-performance backend systems across cloud platforms. I build scalable microservices, design robust APIs (REST/GraphQL), and optimize databases to support large-scale workloads.
My work emphasizes reliability and observability: I have delivered FastAPI and Django services supporting millions of daily API calls, optimized PostgreSQL and MySQL schemas to dramatically reduce query latency, and established Prometheus/Grafana observability stacks to cut mean-time-to-recovery.
I automate CI/CD with GitHub Actions/GitLab CI, deploy containerized workloads to Kubernetes (EKS/AKS), and secure services with OAuth2, JWT, and cloud IAM—driving cloud migrations, performance improvements, and production stability.
Experience
Work history, roles, and key accomplishments
Senior Software Engineer
Meta
May 2020 - Sep 2025 (5 years 4 months)
Built React+TypeScript dashboards and high-performance FastAPI microservices supporting millions of daily API calls; optimized PostgreSQL to reduce 95th-percentile query latency from 200ms to 90ms and reduced MTTR by 45% through improved observability.
Senior Software Engineer
Tripadvisor
Jun 2016 - May 2020 (3 years 11 months)
Built high-throughput recommendation and review services (Django/FastAPI) powering millions of interactions, improved MySQL and Redis performance to cut query latency by 50%, and reduced fraudulent content by 30% via ML integration.
Senior Software Engineer
American Express
Dec 2014 - Jun 2016 (1 year 6 months)
Developed Java/Spring Boot services and React dashboards for payment processing, designed PostgreSQL schemas for ACID-compliant financial workflows, and partnered with fraud teams to deliver real-time detection APIs reducing chargebacks.
Education
Degrees, certifications, and relevant coursework
UBUniversity of California, Berkeley
Master's degree, Information and Data Science
2012 - 2014
Completed a Master's degree focused on Information and Data Science, covering applied machine learning, data engineering, and analytics.
STStevens Institute of Technology
Master's degree, Computer Science
2006 - 2012
Completed a Master's-level program in Computer Science covering algorithms, software engineering, and systems (listed as Master's degree in source).
Tech stack
Software and tools used professionally
Availability
Location
United StatesAuthorized to work in
Salary expectations
Social media
Skills
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