Career
How to become a freelance data scientist
A practical guide for data scientists who want to freelance, find first clients, package services, price projects, and turn analytical skills into paid client work.
Blog
Field notes
Practical essays and guides for developers, on AI engineering, agentic coding, and freelance work.
Career
How to become a freelance data engineer
Learn how data engineers can start freelancing by packaging pipeline, warehouse, automation, data quality, and analytics infrastructure work into paid client projects.
Data
How to build hybrid search for RAG
Hybrid search for RAG combines BM25, dense embeddings, reciprocal rank fusion, reranking, and retrieval evaluation so your system retrieves better evidence.
Career
How to become a freelance data analyst
Learn how data analysts can start freelancing with dashboards, reporting automation, KPI cleanup, business analysis, and practical client acquisition strategies.
Data
How to build agentic RAG in pure Python
Build agentic RAG from scratch with three file tools that list, grep, and read. The same loop coding agents run, applied to your own knowledge, plus the production hardening that makes it hold up.
Career
How to become a freelance tech professional in 2026
A practical roadmap for developers, data professionals, and AI engineers who want to land freelance projects, set rates, write proposals, and build a client pipeline.
Coding
Programming has changed: what I focus on now
How AI is changing software development, why companies are moving from AI-enabled to AI-first to AI-native, and the two skills I focus on as writing code gets faster and cheaper.
Coding
The 5 skills that matter when AI writes the code
AI wrote every line of my two-week Rust rebuild. The five skills that kept me in control are systems thinking, full stack range, clear communication, ruthless simplification, and testing.
Engineering
How to build webhooks for your AI platform
Webhook architecture for production AI systems. Verify signatures, store events, enforce idempotency, dispatch async workers, and recover failures.
Engineering
How to build your own AI platform
A practical architecture for a personal AI platform with webhooks, scheduled workflows, agents, durable events, and a tiered context hub.
Engineering
How I think about a personal AI operating system
Why I'm building my personal AI operating system from first principles instead of cloning agent harnesses like OpenClaw, with three layers, a boring backend, and a context hub.
Career
How to deliver custom AI solutions for clients
The client AI delivery process behind 50+ custom B2B projects, covering discovery calls, proof of concept vs MVP scoping, two-week sprints priced at 10 to 20k euros, one standardized Python stack, and deployment on a Hetzner VM.