Jeffrey Ji
@jeffreyji
I am a senior full-stack engineer specializing in distributed systems, AI platforms, and scalable backend architectures.
What I'm looking for
I am a senior full-stack engineer and AI architect who builds large-scale, cloud-native systems and ML model platforms. I combine hands-on experience in JavaScript, Python and Go with distributed systems, microservices, DevOps and observability to deliver reliable production services.
As a technical lead I have delivered end-to-end platforms: a distributed automated API testing and model deployment system built with Next.js/TypeScript/Prisma/tRPC/Tailwind, an agentic finance system using RAG and LLM fine-tuning, and gateway and observability stacks managing 30+ services with Prometheus and Grafana. I redesigned a recommendation platform as Model-as-a-Service, improving performance ~30%, availability ~20% and reducing model deployment time ~70% for a 10M DAU product, and I have led teams building large-scale crawling, ETL and PB-scale storage systems.
Experience
Work history, roles, and key accomplishments
Lead Consultant Specialist
HSBC
Aug 2023 - Present (2 years 2 months)
Built a distributed automated API testing platform and observability for 30+ services and developed an FXO finance agentic system using RAG and fine-tuned LLMs; maintained MongoDB, Redis, Kafka and ActiveMQ clusters while performing capacity planning and middleware upgrades.
AI Architect Expert
Vivo
Aug 2019 - Jan 2023 (3 years 5 months)
Led redesign of the iMusic recommendation platform using Model-as-Service, improving performance by 30%, availability by 20% and reducing model deployment time by 70% for a 10M DAU product.
Senior Architect
PingPong
Jul 2017 - Jul 2019 (2 years)
Built a 20-person backend team, defined backend architecture (MySQL, HBase, Elasticsearch) and refactored CI/CD with Kubernetes; led development of crawlers and PB-scale data systems deployed on ~200 servers.
Full Stack Engineer
Baidu
Jan 2015 - Jun 2017 (2 years 5 months)
Developed Baidu CRM customer and sales management modules and designed the order subsystem using Node.js, React and TypeScript to deliver internal platform features.
Education
Degrees, certifications, and relevant coursework
Hubei University of Technology
Bachelor's Degree
Completed a Bachelor's degree at Hubei University of Technology in Wuhan.
Tech stack
Software and tools used professionally
Availability
Location
Authorized to work in
Job categories
Skills
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