Ray Wang

Senior Software Engineer

Chime

May 2022 - Current (4 years 1 month)

• Led development of Chime's Trust & Safety Risk Platform using Java, Python, Spring Boot, and AWS, building real-time fraud detection and transaction decision systems supporting millions of members, with integrations across services using Redis, DynamoDB, and Ruby on Rails. • Engineered the Real-Time Transaction Risk Engine with event-driven microservices and asynchronous enrichment pipelines; reduced fraud decision latency by 35% and increased peak transaction throughput by 30%. • Implemented policy orchestration services with validation logic, regional compliance filtering, idempotent request handling, and rule-based eligibility checks; decreased false-positive transaction blocks by 22%. • Built internal fraud tooling APIs and GraphQL ag

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Senior Software Engineer

Affinity.co

Feb 2020 - May 2022 (2 years 4 months)

• Built backend services for the Affinity Relationship Intelligence Platform (AI-powered CRM + deal analytics) using Python, Node.js, PostgreSQL, Redis, and AWS; optimized automated relationship data capture and enrichment workflows. • Designed RESTful and GraphQL APIs exposing relationship insights, engagement metrics, and deal pipeline analytics; reduced API latency by 26% through indexing and query optimization. • Implemented high-throughput asynchronous data ingestion pipelines integrating email and calendar signals into the relationship graph store; increased processing throughput by 30%. • Optimized PostgreSQL schemas and indexing strategies for analytics-heavy workloads; improved complex query performance by 42%. • Collaborated cross

Senior Software Engineer

Google

Nov 2018 - Jan 2020 (1 year 3 months)

• Developed distributed backend services supporting Google's automated abuse detection and policy enforcement infrastructure across large-scale consumer platforms. • Built asynchronous rule evaluation pipelines to process abuse signals and enforce moderation logic under high global traffic. • Improved reliability and scalability of abuse detection services through architectural enhancements and performance optimization. • Strengthened fault tolerance and monitoring for real-time content policy workflows.

Software Engineer

Belvedere Trading, LLC

Aug 2015 - Nov 2018 (3 years 4 months)

• Developed backend components for Belvedere's proprietary electronic market-making and trading platform using C++, Python, Linux systems programming, and distributed architecture, supporting low-latency order execution and real-time pricing across derivatives markets. • Engineered high-performance order processing pipelines with multi-threaded concurrency control, optimized memory management, and network I/O tuning; improved execution throughput and reduced latency during peak market volatility. • Built real-time risk validation and market data ingestion services using event-driven processing and internal messaging systems; strengthened trade correctness, exposure monitoring, and overall production reliability.

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