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Choco Dev

@chocodev

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Senior full-stack software engineer with 7+ years building production web and mobile apps with AI-powered RAG features.

China

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What I'm looking for

I’m looking for a team where I can own architecture and release quality, build production web/mobile features, and ship AI systems using LLMs and RAG—while mentoring others and improving delivery velocity.

I’m a Senior full-stack software engineer with 7+ years shipping production web and mobile applications for international clients. I take ownership of architecture and release quality, building reliable experiences with Next.js, React, TypeScript, Node.js, and Nest.js.

At RemoteX Tech, I led full-stack delivery for international clients and architected a shared component and design-system library that cut feature-development time by 30% while standardizing UI consistency. I also mentored junior engineers across React, REST API design, and testing, raising code-review pass rate and shortening onboarding. I shipped AI-powered features—prompt engineering, streaming responses, and tool calling—integrating OpenAI and Claude, and delivered cross-platform mobile apps with React Native and Expo from a single codebase.

My work also focuses on practical AI systems in production. I engineered a Retrieval-Augmented Generation system in Python and Ollama (embeddings, vector store, tuned retrieval), lifting document-grounded answer accuracy by 25%, and integrated external knowledge with chunking and re-ranking to cut query resolution time by 25%. I tuned the real-time query pipeline using caching, batching, and async I/O to improve latency and throughput under production load.

Experience

Work history, roles, and key accomplishments

Senior Software Engineer

RemoteX Tech

Jul 2022 - Dec 2025 (3 years 5 months)

Led full-stack delivery of production web applications, owning architecture and release quality using Next.js, React, TypeScript, and Nest.js. Architected a shared component library and an AI/RAG system that improved feature delivery speed by 30% and answer accuracy by 25%.

Software Engineer

RemoteX Tech

Jan 2021 - Jun 2022 (1 year 5 months)

Built responsive React interfaces and a reusable component library, improving accessibility and page interactivity. Designed and shipped server-side REST APIs with Node.js and Express backed by PostgreSQL and MongoDB, and improved CI release reliability with additional quality gates.

React Component Libraries Accessibility Node REST APIs PostgreSQL MongoDB CI CD Indexing Pagination Validation

Software Developer

Freelance Developer

Aug 2020 - Dec 2020 (4 months)

Architected, built, and deployed end-to-end web applications for small-business clients using Next.js and Node.js, partnering directly through requirements, build, and launch. Set up cloud hosting, CI/CD, and automated test workflows to shorten deploy cycles and reduce regressions per release.

Next.js Node CI CD Automation Testing

Education

Degrees, certifications, and relevant coursework

Shenyang City University

Bachelor of Science, Computer Science

Activities and societies: Relevant coursework: Data Structures & Algorithms, Operating Systems, Databases, Computer Networks, Software Engineering, Machine Learning.

Earned a B.S. in Computer Science from Shenyang City University, graduating in 2020, with coursework in areas including Data Structures & Algorithms, Operating Systems, and Machine Learning.