ssiegera
Available for select work in 2026

Hi, I'm Siegfreidan engineer who buildsAI & software.

Machine learning and software engineer. I love tech, innovation, and design, building AI systems and products from the ground up where great engineering meets thoughtful craft.

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Design SystemsWeb AppsBrand IdentityMotionProduct StrategyTypeScriptReactNext.jsTailwindNode.jsAI IntegrationsDX ToolingDesign SystemsWeb AppsBrand IdentityMotionProduct StrategyTypeScriptReactNext.jsTailwindNode.jsAI IntegrationsDX Tooling
01 / About

A machine learning engineer who loves to ship.

I'm Siegfreid, a machine learning and software engineer with a dual degree from Duke and Duke Kunshan University in Applied Mathematics and Computer Science. I spent most of my time in university researching AI and machine learning systems, including model evaluation and building reliable ML pipelines. Today I help startups ship products and AI systems. I love tech, innovation, and design, and I'm happiest when research, engineering, and product thinking come together to build something real.

What I build

ML & AI systems

I build agentic RAG pipelines, integrate LLMs into products, and optimize retrieval so AI systems are accurate, reliable, and ready to deploy.

  • RAG
  • LangChain
  • PyTorch
  • Hugging Face

Model evaluation & research

I design evaluation pipelines, benchmark models, and fine-tune embeddings so teams can make rigorous decisions about what actually works.

  • RAGAs
  • OpenAI Evals
  • Benchmarking
  • Fine-tuning

Full-stack engineering

I ship product features across the stack, from React frontends and APIs to databases and deployment workflows.

  • React
  • Next.js
  • Python
  • MySQL
  • Docker

Startup product work

I help startups move from idea to shipped product, translating design into clean interfaces and building features end to end.

  • UI/UX
  • Figma
  • Product shipping
  • Frontend tooling
02 / Selected work

A handful of things I'm proud of.

Projects where I've built AI systems, evaluated models, and shipped products that matter.

03 / Experience

Where I've been building.

A snapshot of my professional and research experience.

Resume

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Hinton Innovations

Software Engineer

Oct 2025 - Present

Hong Kong SAR

Building frontend applications at an AI startup, leading UI/UX improvements, and translating Figma designs into responsive product interfaces.

ChatDKU

AI Engineer

Aug 2024 - Dec 2025

Edge Intelligence Lab, Jiangsu, China

Deployed Qwen3-8B in an agentic RAG pipeline, optimized retrieval with ChromaDB and prompt engineering, and built automated evaluation pipelines with OpenAI Evals.

ChangLab

Data Scientist

Apr 2025 - Aug 2025

Duke Compute Cluster

Curated 2M+ GPS trajectories, engineered mobility features for transformer-based LLM training, and maintained a scalable MySQL database for GraphSAGE model work.

Kunshan Supercomputing Center

Student Researcher

Jun 2024 - Aug 2024

Jiangsu, China

Researched fine-tuning and evaluation of retrieval models, integrated Llama3 8B with RAG, and improved RAGAs metrics including Hit Rate, Faithfulness, and Context Precision.

05 / Get in touch

Have something in mind?
Let's talk.

I'm always open to interesting projects, collaborations, and a good conversation. Drop a line and I'll get back within a day or two.