Bob Belderbos - Co-Founder at PyBites

Bob Belderbos

Co-Founder at PyBites

Alicante, Valencian Community, Spain

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Summary

🤩

Rockstar

🎓

Top School

Bob Belderbos is an engineering coach and co-founder with two decades of software experience who helps developers move beyond "working code" to build durable architecture and engineering judgment AI can’t replace. After a decade building and automating services at Sun/Oracle, he co-created PyBites—coding platforms used by 50k+ developers—and has coached 150+ engineers into senior roles or SaaS launches. He specializes in professional-grade Python, Rust, and Agentic AI, running hands-on 1:1 engagements and six-week team cohorts that ship real, production-ready projects rather than certificates. Bob’s background in backend development and testing (notably contributions to PyBites challenge repos and tooling for 100DaysOfCode) means his coaching is grounded in concrete PR reviews, high test coverage, and maintainability. Based in Alicante, he pairs pragmatic product focus with deep tooling experience, often rescuing or hardening AI-generated codebases into systems designed to last.

9 years of coding experience

11 years of employment as a software developer

O’Reilly

Bachelor of Business Administration (BBA), Bachelor of Business Administration (BBA) at Hogeschool van Amsterdam

English, Spanish, Dutch, French, Italian

Github Skills (12)

unit-testing10

api10

project-structure10

test-driven-design10

python10

apidoc10

scripting10

webscraping9

coding9

sqlite9

code-review8

data-analysis7

Programming languages (5)

RustJavaScriptHTMLJupyter NotebookPython

Github contributions (5)

pybites/challenges

Jan 2017 - Nov 2019

PyBites Code Challenges

Role in this project:

Back-end Developer & Tester

Contributions:428 commits, 369 PRs, 538 pushes in 2 years 10 months

Contributions summary:Bob wrote several commits with the intention of creating and testing code challenges. They focused on the creation of new challenges, including adding data and test cases. The code changes included writing test files and providing code stubs for challenge creation in Python.

codechallengespythonpybites

pybites/100DaysOfCode

Mar 2017 - Oct 2019

PyBites #100DaysOfCode

Role in this project:

Back-end Developer

Contributions:33 commits, 9 PRs, 139 pushes in 2 years 7 months

Contributions summary:Bob primarily contributed to the creation and setup of the project's initial structure, including the README and directory organization. They developed a Python script to generate a progress log (LOG.md) and create individual directories for each day of a 100-day coding challenge. The user also implemented a script to scrape data from a World of Warcraft API and query an OMDB API, incorporating modules such as requests_cache for efficiency.

pythonpython3python-scriptpybites

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