Markus Bertheau
Senior Software Engineer at Aiven
Würzburg, Bavaria, Germany
Summary
🤩
Rockstar🎓
Top SchoolMarkus Bertheau is a senior software engineer with 13 years of experience building and leading engineering teams from Würzburg, Germany. He blends hands-on full‑stack development (notably ClojureScript/re-frame and Django) with product-focused technical leadership, having driven major rewrites, integrations, and developer experience improvements. Markus has a track record of shipping reliable backend systems, e-commerce features, and secure integrations while also championing code review, test automation and smoother onboarding. He contributes to well-known open-source projects like re-frame, django-oscar and Spacemacs, improving readability, UX and maintainability rather than chasing novelty. Honest, direct feedback and pragmatic solutions define his working style, and he often surfaces small but impactful improvements — from typo fixes and clearer debug messages to consistent interceptor refactors. Currently at Aiven, he continues to combine engineering craftsmanship with mentoring and operational rigor.
13 years of coding experience
20 years of employment as a software developer
Humboldt-Universität zu Berlin
German, English, Russian, Polish, French, Korean
Github Skills (26)
interceptor10
python10
back-end-development10
clojure-cli10
django10
configuration-management10
re-frame10
migration10
clojure10
emacs10
configuration-file10
configurations10
keybindings10
react10
clojurescript10
Programming languages (15)
Github contributions (5)
django-oscar/django-oscar
Nov 2013 - Apr 2015
Domain-driven e-commerce for Django
Role in this project:
Back-end Developer
Back-end DeveloperContributions:163 commits, 10 PRs, 33 pushes in 1 year 5 months
Contributions summary:Markus primarily contributed to the back-end development of the Django-based e-commerce platform. Their work involved fixing migrations, enhancing the partner dashboard, and improving template customization for partners. They also addressed various bug fixes related to image handling and implemented a fix for password reset functionality.
pythondjango-oscarecommercecommercedjango
day8/re-frame
Jan 2016 - Sep 2019
A ClojureScript framework for building user interfaces, leveraging React
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:6 commits, 7 PRs, 13 comments in 3 years 8 months
Contributions summary:Markus primarily contributes to improving the re-frame framework, a ClojureScript framework for building user interfaces with React. Their contributions involve correcting documentation references, fixing spelling errors, correcting a version typo, and clarifying debug messages. They also refactored code to consistently use (co)effect helpers and extract event information in a more uniform way across different interceptors, leading to improvements in code readability and maintainability.
reactleveragingspauser-interfacesclojurescript
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