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Alex Chen

Senior Backend Engineer

Backend engineer with 7 years building scalable APIs and distributed systems. Shipping Node.js services on PostgreSQL and AWS, focused on reliability and measurable business impact.

Education

2013 - 2017

B.Sc.

University of California, Berkeley

Experience

Mar 2023 - Present

Staff Backend Engineer

Lumen Labs

  • Cut median API latency 38% by rewriting hot paths in Node.js + Postgres logical replication.
  • Designed multi-tenant billing service handling $14M/mo on AWS (SQS, Lambda, RDS).
  • Led on-call hygiene improvements, paged events down 4× across two quarters.

Jun 2020 - Feb 2023

Senior Software Engineer

Aperture Systems

  • Built real-time data pipeline processing 50M events/day with Kafka and Flink.
  • Reduced infrastructure costs 28% through query optimization and caching layers.

Projects

Ledger

Open-source double-entry billing engine used by four startups in production.

TypeScript, PostgreSQL, Redis

Certifications

AWS Solutions Architect – Professional

Amazon Web Services · 2023

Alex Chen

Alex Chen

alex.chen@email.com+1 (415) 555-0138San Francisco, CAalexchen.devlinkedin.com/in/alexchen

Professional Summary

Backend engineer with 7 years building scalable APIs and distributed systems. Shipping Node.js services on PostgreSQL and AWS, focused on reliability and measurable business impact.

Experience

Staff Backend Engineer

Mar 2023 - Present

Lumen Labs

  • Cut median API latency 38% by rewriting hot paths in Node.js + Postgres logical replication.
  • Designed multi-tenant billing service handling $14M/mo on AWS (SQS, Lambda, RDS).
  • Led on-call hygiene improvements, paged events down 4× across two quarters.

Senior Software Engineer

Jun 2020 - Feb 2023

Aperture Systems

  • Built real-time data pipeline processing 50M events/day with Kafka and Flink.
  • Reduced infrastructure costs 28% through query optimization and caching layers.

Projects

Ledger

2022

Open-source double-entry billing engine used by four startups in production.

TypeScriptPostgreSQLRedis
Alex Chen

Alex Chen

alex.chen@email.com| +1 (415) 555-0138| San Francisco, CA| linkedin.com/in/alexchen

Skills

  • • Node.js
  • • PostgreSQL
  • • AWS / Cloud
  • • System Design
  • • TypeScript

Education

University of California, Berkeley

B.Sc., Computer Science

2017

Certifications

AWS Solutions Architect – Professional

Amazon Web Services

Languages

  • English (Native)
  • Mandarin (Fluent)
  • Spanish (Intermediate)

Interests

Distributed systems, Typography, Trail running

Objective

Backend engineer with 7 years building scalable APIs and distributed systems. Shipping Node.js services on PostgreSQL and AWS, focused on reliability and measurable business impact.

Professional Experience

Staff Backend Engineer

Mar 2023 – Present

Lumen Labs, San Francisco, CA

  • Cut median API latency 38% by rewriting hot paths in Node.js + Postgres logical replication.
  • Designed multi-tenant billing service handling $14M/mo on AWS (SQS, Lambda, RDS).
  • Led on-call hygiene improvements, paged events down 4× across two quarters.

Senior Software Engineer

Jun 2020 – Feb 2023

Aperture Systems, Remote

  • Built real-time data pipeline processing 50M events/day with Kafka and Flink.
  • Reduced infrastructure costs 28% through query optimization and caching layers.

Projects

Ledger

2022

Open-source double-entry billing engine used by four startups in production.

Curriculum Vitae · 2026Vol. 01 / Issue 01

Alex Chen

Senior Backend Engineer

A

Profile

Backend engineer with 7 years building scalable APIs and distributed systems. Shipping Node.js services on PostgreSQL and AWS, focused on reliability and measurable business impact.

B

Experience

Mar 2023
·
Present

Staff Backend Engineer

Lumen Labs · San Francisco, CA
  • ▸Cut median API latency 38% by rewriting hot paths in Node.js + Postgres logical replication.
  • ▸Designed multi-tenant billing service handling $14M/mo on AWS (SQS, Lambda, RDS).
  • ▸Led on-call hygiene improvements, paged events down 4× across two quarters.
Jun 2020
·
Feb 2023

Senior Software Engineer

Aperture Systems · Remote
  • ▸Built real-time data pipeline processing 50M events/day with Kafka and Flink.
  • ▸Reduced infrastructure costs 28% through query optimization and caching layers.
C

Selected Work

Ledger

Open-source double-entry billing engine used by four startups in production.

TypeScript · PostgreSQL · Redis

D

Certifications

AWS Solutions Architect – Professional
Amazon Web Services · 2023
· ALEX CHEN ·PAGE 01

Alex Chen

Senior Backend Engineer

Backend engineer with 7 years building scalable APIs and distributed systems. Shipping Node.js services on PostgreSQL and AWS, focused on reliability and measurable business impact.

Education

2013 - 2017

B.Sc.

University of California, Berkeley

Experience

Mar 2023 - Present

Staff Backend Engineer

Lumen Labs

  • Cut median API latency 38% by rewriting hot paths in Node.js + Postgres logical replication.
  • Designed multi-tenant billing service handling $14M/mo on AWS (SQS, Lambda, RDS).
  • Led on-call hygiene improvements, paged events down 4× across two quarters.

Jun 2020 - Feb 2023

Senior Software Engineer

Aperture Systems

  • Built real-time data pipeline processing 50M events/day with Kafka and Flink.
  • Reduced infrastructure costs 28% through query optimization and caching layers.

Projects

Ledger

Open-source double-entry billing engine used by four startups in production.

TypeScript, PostgreSQL, Redis

Certifications

AWS Solutions Architect – Professional

Amazon Web Services · 2023

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