Open to opportunities

Ken Lu

@kenlu

Software engineer building scalable web, mobile, and AI products—designing backend services and RAG features that ship fast.

United States

Message

What I'm looking for

I’m looking for a fast-paced team where I can own backend architecture, CI/CD, and AI-powered features (LLMs/RAG), collaborate cross-functionally, and ship performant, user-centric products with measurable reliability.

I’m a versatile software engineer with a strong track record in fast-paced environments, building scalable products across web, mobile, and AI domains. I lead architecture decisions and deliver high-impact features, partnering cross-functionally to build performant, user-centric solutions.

At Appstem, I engineered a B2B AI-powered content moderation platform and designed backend services and APIs handling 500K+ daily requests with 99.9% uptime. I implemented CI/CD and automated testing pipelines, cutting deployment time by 60% and increasing release frequency by 2x, while integrating LLMs with vector databases to build retrieval-augmented (RAG) systems that improve accuracy and reduce hallucinations.

Experience

Work history, roles, and key accomplishments

Current

Software Engineer

Current

Appstem

Sep 2020 - Present (5 years 7 months)

Led development of scalable web and mobile solutions for multiple clients, making architecture decisions and shipping high-impact features. Built a B2B AI content moderation platform handling 500K+ daily requests with 99.9% uptime, and cut deployment time 60% while increasing release frequency 2x by implementing CI/CD, automated testing, and LLM-based RAG pipelines.

TypeScript Python Kafka CI CD Pipelines Vector Databases

Software Developer

Yeti LLC

Sep 2018 - Oct 2019 (1 year 1 month)

Developed client-facing web and mobile applications and built/integrated backend APIs to ensure reliable data flow across platforms. Translated business requirements into scalable solutions, delivered rapid prototypes, and improved performance and maintainability through refactoring and debugging.

Web Application Development Mobile App Development Rapid Prototyping Refactoring Performance Optimization Debugging

Web Developer

The Difference Engine

Jun 2017 - Dec 2017 (6 months)

Developed and maintained responsive, accessible websites and internal tools for nonprofit and charity organizations in a pro bono, mission-driven environment. Built front-end components and integrated backend services, improving code quality through testing, debugging, and iterative enhancements across multiple concurrent projects.

Backend Services Debugging Testing Iterative Development Cross Functional Collaboration