Open to opportunities

Qiwei Jin

@qiweijin

Message

Full-stack software engineer delivering scalable ad-tech and finance systems with low-latency SLAs.

United States

Message

What I'm looking for

I seek hands-on engineering roles building scalable, low-latency systems at product-focused teams that value reliability, mentorship, and measurable user impact.

I am a full-stack software engineer with 7+ years building high-performance platforms for ad tech and financial services, delivering mission-critical services with millisecond-level SLAs. I design and implement distributed backend systems in Java and Kotlin, build React/Next.js frontends, and operate services on AWS with Docker and Kubernetes.

I have led backend engineering for interactive workflow tools and ad platforms, implemented gRPC/Protobuf and REST APIs, optimized storage with Redis and Cassandra, and mentored junior engineers to improve reliability and observability. My work focuses on scalable architecture, real-time data processing, and measurable product impact for millions of users.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

DoorDash

Jun 2022 - Present (3 years 4 months)

Engineered full‑stack Ads Platform features delivering high‑performance search, ad ranking and real‑time bidding serving millions daily; built React/Next.js dashboards and designed distributed Java/Kotlin backend services to meet millisecond SLAs.

React Next.js TypeScript Java Kotlin gRPC Redis Cassandra Docker Kubernetes

Senior Software Engineer

Bloomberg LP

Jan 2021 - Jun 2022 (1 year 5 months)

Built full‑stack Bloomberg Terminal features combining React UIs and Java Spring Boot services for real‑time financial workflows, delivering sub‑second latency and collaborative data modeling capabilities.

React Java Spring Boot gRPC Redis Cassandra PostgreSQL Docker Kubernetes

Software Engineer

Bloomberg LP

Dec 2018 - Jan 2021 (2 years 1 month)

Built full‑stack solutions for the Bloomberg Terminal including data visualization tools that processed large market datasets and automated CI/CD pipelines to accelerate releases.

React Java Spring Boot Docker Kubernetes CI CD Data Visualization AWS Kafka

Education

Degrees, certifications, and relevant coursework

Duke University

Master of Science, Computer Science and Machine Learning

2015 - 2018

Master of Science in Computer Science and Machine Learning completed from 2015 to 2018, focusing on data visualization and scalable systems for large financial datasets.