Hi, I'm Chengjia Feng
Software Engineer & Full-Stack LLM Application Developer
Passionate about building scalable web applications, machine learning solutions, and data-driven systems. Currently pursuing MS in Software Engineering systems at Northeastern University.
About Me
I'm a passionate software engineer currently pursuing my Master's in Software Engineering systems at Northeastern University. With a strong foundation in full-stack development, AI Agent development and machine learning, I enjoy creating innovative solutions that solve real-world problems.
My experience spans across various technologies including Python, Java, React, Node.js, Langchain/Langgraph and cloud platforms. I've worked on projects ranging from e-commerce platforms to AI agent applications, always focusing on writing clean, efficient, and scalable code.
When I'm not coding, I enjoy exploring new technologies, contributing to open-source projects, and staying up-to-date with the latest industry trends. I'm particularly interested in the intersection of AI and web development.
1+
Years (Internships included)Experience
5+
Projects Completed
8+
Technologies Mastered
Experience
AI Engineering Intern
Phicil-itate Change
Jan 2025 - Aug 2025- Engineered a full-stack web application using React.js and FastAPI, implementing a GitOps pipeline via Argo CD and GitHub Actions for CI/CD, deployed on CloudFlare.
- Developed five AI agents processing 1,000+ daily queries:
- Voice Agent - Phone system integration (+1 9786376169)
- LangGraph-based CoT Deep Research Agent
- CrewAI Multi-agent Report Generator
- Natural Language SQL Query Agent
- Automated Data Visualization Pipeline
- Designed and maintained a HIPAA-compliant PostgreSQL database managing 3,000+ patient records, incorporating TLS encryption, audit logging, and achieving 99.9% uptime.
Graduate Student
Northeastern University
Sep 2023 - Present- Pursuing Master of Science in Software Engineering systems
- Relevant Coursework: Algorithms, Database Systems, Machine Learning, Software Engineering
- Maintaining strong academic performance while working on practical projects
- Active participant in coding competitions and hackathons
Software Engineering Co-op
Zhongshan Super Delight Software
Aug 2021 - Oct 2021- Contributed to the development and overall testing of all modules, including solving high concurrency using Spring Cloud and async processing in a domestic hardware retail system in China using the F2B2C business model.
- Designed and developed RESTful APIs for Warehouse and Sales modules using springMVC, MyBatis, and SQL,
- implementing a micro-service architecture with RabbitMQ message queuing and Redis caching
Undergraduate Student
University of Electronic Science and Technology of China
Sep 2018 - Jul 2022- Pursuing Bachelor in Computer Science
- Relevant Coursework: Data structure and Algorithms, Database Systems, Linux management
- Maintaining strong academic performance while working on practical projects
Featured Projects
Agentic rag Assistant for Techdocs
- Agentic RAG – Enables querying of any uplaoded documents (PDFs, Markdown, Notebooks) usingagentic RAG to provide grounded answers. Includes official LangChain docs by default.
- GitHub Resource Finder (in development) – An agent-based tool for retrieving relevant GitHub resources
Opt-imize
AI-powered platform supporting OPT/H1B immigration queries using RAG, GPT-4o, and LangChain agents. Features real-time USCIS data, a CrewAI multi-agent system, MERN-based web app, and AWS/Kubernetes deployment
School Sports Management System
Built and deployed modules for field, equipment, and athlete management using Spring Boot, MyBatis, and Docker. Led backend/API development and CI/CD automation with Jenkins and GitHub Actions, cutting release cycles by 60%.
Skills & Technologies
Frontend Development
Backend Development
Database & Cloud
Tools & Others
Get In Touch
Let's work together
I'm always interested in new opportunities and exciting projects. Whether you have a question or just want to say hi, feel free to reach out!