Developer coaching that meets you where you are.

Hi, I'm Bob Belderbos, a software developer and coach. 20 years building software, 6 years coaching 150+ engineers, mostly in Python, now branching into AI and Rust. AI makes syntax easy; shipping maintainable software is still hard. We'll build real apps together and you'll come out a stronger engineer.

Pick where you are.

Every engagement starts with a free 30-min call where we scope a custom plan together. Or pick one of the structured programs below.

Python · 6 weeks

Python Build

Full-stack Python app with industry-standard patterns. Current build: Snipster. Repository pattern, TDD, 100+ tests, three interfaces (CLI, API, web), Docker, CI/CD.

Pick this if you want a layered, tested Python app and a clear path to shipping it.

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AI · 6 weeks

Agentic AI

Full-stack AI agent app: function calling, Telegram bot, Streamlit dashboard. 100+ tests, Docker deployment. Led by Juanjo Expósito.

Pick this if you work with LLMs and want production-shaped agent code, not POC glue.

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Rust · 6 weeks

Python to Rust

Build a JSON parser in Rust with PyO3 Python bindings. Tokenizer, recursive descent parser, benchmarks vs Python's json module. Led by Jim Hodapp.

Pick this if you write Python and want real Rust depth, not just syntax.

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What developers say

150+ developers coached since 2020.

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About me

Bob Belderbos

Bob Belderbos

I've been programming since 2006: VBA macros, PHP, Perl, and since 2012 Python. 10+ years building software at Sun/Oracle, then co-founded Pybites end of 2016, hosting 500+ coding exercises across two platforms I built.

Since 2020 I've coached 150+ engineers, from beginners to seniors, helping them ship real apps and grow their confidence. I keep my training current with AI because productivity without system knowledge creates a mess. Also fascinated by Rust since 2024, which is making me a better Python developer. I coach 1:1 and co-run two cohorts: Agentic AI with Juanjo Expósito, and Scripter to Rust with Jim Hodapp. More about me →

Sun/Oracle · 10+ years 150+ developers coached Co-founder Pybites 500+ exercises built ยท 50K+ accounts Python, Rust, AI Django SaaS products built Git, Unix & Vim SIG certified · clean code Support Engineer → Software Engineer Coaching in English, Dutch & Spanish

Featured articles

April 28, 2026

Vibe Coding is Easy, Owning the Architecture Isn't

Generating code with AI is easy. Owning the architecture isn't. Why vibe coding creates the same trap as tutorial paralysis, and what to do instead.

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April 20, 2026

From Hobby Code to SaaS to Orchestrating AI Agents

Ryan Austin ships payroll software in the Bahamas. In 2021, he couldn't tell if his architecture was sound. In 2025, he's directing AI agents with confidence. The foundation made the difference.

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April 1, 2026

From 1,069 to 156 LOC: Design Over Code

I built a 1,069-line Rust web app with AI in two sessions. Then I deleted it. The real productivity wasn't in the code, it was in the question I almost skipped.

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“Three months ago I was literally writing ‘Hello World’. I just landed my first real business client who ran their entire payroll using my app.” — Ryan A., built thepayroll.app

Your code works.
Let's make sure it keeps working in production.

Tell me where you are and what you're working on. I'll tell you how I can help.

Book your free call

Or email me what you're working on →