Open to opportunities

Jeffrey Ji

@jeffreyji

I am a senior full-stack engineer specializing in distributed systems, AI platforms, and scalable backend architectures.

China

Message

What I'm looking for

I seek senior roles building cloud-native, AI-enabled platforms with ownership of architecture, scalability and observability; I value collaborative teams, technical leadership, and high-impact projects.

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

Current

Lead Consultant Specialist

Current

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.

Next.js TypeScript Prisma tRPC Consul Prometheus Grafana

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.

Recommendation Systems Kubernetes C#)TensorFlow PyTorch Faiss Redis C#

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.

Backend MySQL HBase Elasticsearch Kubernetes Python CI CD Data Engineering

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.

Node React TypeScript REST APIs SQL