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 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.
View program →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.
View program →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.
View program →What developers say
150+ developers coached since 2020.
“I was building a full-stack application mostly through AI-assisted coding and needed guidance to take it from proof of concept to production. Bob coached me through the parts I couldn’t validate on my own: Django settings architecture, payment security, error handling patterns, query optimization. He reviewed my codebase thoroughly, explained why things mattered, and helped me build a concrete testing strategy. More than anything, his coaching gave me the confidence to actually ship.”— Luca S. · Founder · Took a proof of concept to production SaaS
“Bob encourages you not to wait for 100% — push iterative improvements. Two of my three apps are now in production and got good recognition among my peers.”— Manoj K. · USA · 10+ years IT, apps now in production
“Six years later, I can see that doing the coaching was a great decision. I learned to write clean, well-tested, production-ready code and to think critically about my work. In January I was promoted to Senior AI Engineer and became a team coordinator — both were in my plan, though I wasn’t sure I could do it.”— Piotr R., Senior AI Engineer at Lingaro · Coached in 2020
“I grew more in a few weeks than I would have in 2+ years by myself. After years of dreaming of personal projects, I finally built an API, a Django app, and an AI-powered CLI tool.”— Kishan P., Data Engineer · Built 3 apps
“I’d maxed out every book and online course — Coursera, Udacity, Udemy — and hit a wall I couldn’t break through on my own. I expected to build one app. I shipped three.”— Joshua E. · Product manager to senior software engineer, now leading AI development
“I didn't just learn how to code — I learned how to think like a developer. I now feel comfortable working across the full stack. More importantly, I feel like a real developer.”— Christina L. · From scripter to full-stack developer
“Three months ago I was literally writing ‘Hello World’. I went from basic scripts to launching a full-scale SaaS payroll application in three months. I just landed my first real business client who ran their entire payroll using my app. Seeing someone have that trust and confidence in something I built is surreal.”— Ryan A. · Built and launched thepayroll.app
About me
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 →
Featured articles
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.
Read →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.
Read →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.
Read →“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