Chi Pham

Backend Engineer

• Architected and optimized Ronin V2 core infrastructure, reducing database CPU usage by 50% (4000 to 2000 CU) and decreasing block insertion latency by 33% (600ms to 400ms) through efficient query optimization and deadlock elimination.
• Refactored legacy RPC system to handle 20,000 RPS peak traffic, successfully stabilizing P99 response time at <200ms for 10,000 RPS (p95), ensuring seamless user experience for millions of blockchain interactions.
• Built high-performance microservices processing terabytes of on-chain and off-chain data, achieving 99.99% uptime and meeting strict SLAs for replication lag (<300ms P99 latency).

Software Engineer

• Engineered a distributed event processing engine using Apache Flink, capable of processing 1M+ events daily and terabytes of data weekly, ensuring real-time visibility for millions of parcel tracking events.
• Optimized API Gateway (AWS Lambda, Python) to handle high-concurrency client requests, significantly improving throughput and fault tolerance by implementing asynchronous processing with Kafka.
• Enhanced system scalability by decoupling services, allowing the platform to handle traffic spikes during peak logistics seasons without degradation.

Senior Software Engineer

• Developed a centralized API Gateway in Golang with OAuth authentication, streamlining microservice communication and improving security posture.
• Optimized data indexing for WordPress content in MongoDB, achieving an 8x reduction in API latency (seconds to microseconds) and significantly cutting Redis caching costs by removing redundant cache layers.

Software Engineer

• Built and maintained the Liquid Wallet Service, managing critical crypto inflows/outflows for Liquid.com with zero security incidents.
• Designed a secure, keyless crypto wallet system utilizing multifactor recovery, allowing users to manage assets without exposing private keys or seed phrases.
• Integrated multiple blockchain networks (Bitcoin, Ethereum, Solana, Avalanche, Terra, Stacks 2.0), expanding asset support and enabling cross-chain compatibility for the platform.

Software Engineer

• Developed cross-border (4PL/XB) logistics services, enabling seamless shipment tracking across six South-East Asian markets (Singapore, Malaysia, Indonesia, Thailand, Vietnam, Philippines).
• Scaled logistics operations platform to handle 250M+ API requests daily, implementing webhooks and event-driven notifications to support 2M+ daily parcel deliveries.

Associate Software Engineer

• Built P2P money transfer microservices for Zalo Chat, enabling millions of users to send/receive money seamlessly.
• Developed the "Split Bill" feature, handling complex transaction logic and settlement flows within group chats.
• Optimized transaction processing using Kafka and gRPC, ensuring high throughput and low latency for real-time financial transactions.

• Refactored legacy AWS Cognito service using Clean Architecture principles, significantly improving code maintainability and enabling robust unit testing coverage.
• Resolved critical authentication and authorization bottlenecks, streamlining user access flows and unblocking dependent development teams.
• Tech Stack: Python, Flask, AWS Lambda, AWS API Gateway, MySQL.