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Weilun Yuan

@weilunyuan1

Message

I build scalable, low-latency software for commerce and trading platforms.

United States

Message

At Amazon, I build distributed backend services and customer-facing experiences for grocery subscriptions and consumer commerce. I take systems from architecture and API design through rollout, observability, and reliable production operation.

Previously at Bank of America Merrill Lynch and an equity algorithmic trading startup, I built low-latency Java and C++ systems for order processing, market data, smart routing, replay, backtesting, and execution workflows.

My work also includes performance-sensitive networking and telemetry software at Cisco. I bring 10+ years of systems engineering across cloud-native platforms, real-time processing, reliability, and applied AI/ML.

Experience

Work history, roles, and key accomplishments

Current

Software Engineer

Current

Amazon

Nov 2021 - Present (4 years 10 months)

Architected and delivered distributed backend services and APIs for a large-scale consumer commerce and subscription platform. Drove end-to-end full-stack product delivery, improved scalability and reliability, and provided technical leadership and mentoring.

Java Python Spring Boot REST GraphQL AWS Docker Kubernetes Terraform PostgreSQL DynamoDB Redis Kafka OpenTelemetry Prometheus Grafana CI CD Microservices Distributed Systems

Software Engineer

Bank of America Merrill Lynch

Jul 2018 - Oct 2021 (3 years 3 months)

Designed and developed core components of a low-latency electronic trading platform using Java and C++. Improved latency, throughput, and resiliency, and built robust testing and observability capabilities.

Java C++Low Latency Systems Algorithmic Trading Concurrency Performance Optimization Testing Observability Performance Profiling

Software Engineer

Equity Algorithmic Trading Startup

Jan 2017 - Jun 2018 (1 year 5 months)

Built core low-latency trading and market-data infrastructure using C++ and Java. Developed market replay, backtesting, and quantitative research infrastructure, and optimized critical execution paths.

C++Java Low Latency Systems Market Data Algorithmic Trading Backtesting Performance Optimization Concurrency

Software Engineer

Cisco

Jul 2016 - Dec 2016 (5 months)

Developed high-performance C/C++ networking and infrastructure software, contributing to real-time data processing and system-state management. Improved performance, reliability, and maintainability through debugging, profiling, and automated testing.