Jan Milde
DE | EN Contact me

AI Engineer • Full-Stack • Ex-Founder

I build reliable AI products that ship.

Fullstack engineer specialized in AI/NLP with 8+ years building and shipping AI applications in production. Ex‑founder. First employee at YC‑backed startup where I helped grow from single product to 4‑product suite.

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Meetings handled by my bot
LLM requests shipped
Years in production AI
8+
Products led end‑to‑end
2 initial builds

Recent work & highlights

Open for projects →
LLM platform

LLM at scale

Architected and implemented LLM integrations used across all products of a YC startup. Reliably needs to serve, store and monitor all LLM requests. Built and validated prompts for all core workflows using human-in-the-loop and LLM-as-a-judge techniques.

  • • Over 3,000,000+ total LLM requests processed
  • • Currently 10,000+/day
  • • 20+ complex prompts created and validated
Healthcare AI

German healthcare AI

After delivering several AI tools to a healthcare company, I was hired to rapidly build a MVP that integrated those and assisted users in a complex medical coding workflow. This system ended up being marketed and sold and was used in production for years.

  • • Outlier detection and predictions on medical data
  • • Working with domain experts to understand and automate their workflows
  • • Handover of the system to the in-house dev team
Product leadership

Zero → one → many

Led initial development of two product offerings for a YC start-up and one long‑term. From discovery calls and scoping, over coding to onboardings and ongoing support. Demos of the product during development lead to 60k+$ in sales, already before it went live.

  • • Proposal generation tool
  • • AI Email management + Outlook integration
  • • Gathering customer feedback before and during development

CEO/CTO references available upon request .

How I can help

Bring me in to quickly scope, build, and scale. I can plug into your team or run a self‑contained workstream.

LLM/RAG architecture design

Design and implement LLM systems from concept to production scale.

Agentic systems design and implementation

Build intelligent agents that can reason and act on complex data.

End‑to‑end full‑stack product build

Complete product development and integration from frontend to backend.

Scaling and optimization

Scale existing AI systems for better performance and cost control.

Rapid prototyping

Quick proof-of-concept development to validate AI solutions.

AI productivity guidance

Help companies and dev teams integrate AI to boost productivity.

About me

Freelance AI/NLP engineer with 8+ years building and shipping AI applications in production (including pre‑LLM era). Ex‑founder.

  • • Ex Founder: Lead a team developing AI solutions for other companies. Switched to an own product, building an healthcare process managment tool.
  • • First Employee at YC‑Backed Startup (3+ years): Helped grow from single product to a 4‑product suite
  • • Leadership Role: As an ex-founder and senior developer I have managed product development and teams in different scenarios.
  • • B.Sc. in Psychology: Understanding of user behavior and applying AI with user‑centered design
  • • M.Sc. in AI: Deep understanding of AI models, their strengths and limitations.

Tell me about your project

I work with founders and product teams to ship AI features users love. I'm available for short sprints or longer engagements. What are you building? What's the timeline? What's your success metrics?

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