Michał Sipa
Senior Backend Developer at Samozatrudnienie
Wrocław, Lower Silesian Voivodeship, Poland
Summary
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Rockstar🎓
Top SchoolMichał Sipa is a Senior Backend Developer with 10 years of experience building and leading Python-based web applications, currently contracting for lulu.com from Wrocław, Poland. He combines deep backend expertise in Django, FastAPI and Starlette with practical API design (REST, GraphQL, gRPC) and hands-on work on high-performance e-commerce platforms like Saleor. As a former team lead at Mirumee, he balanced architecture, testing strategy and small-team management while tackling tech debt across monoliths and microservices. Michał is an active open-source contributor who has improved both backend models and frontend storefront quality on Saleor projects, showing attention to maintainability and SEO details. Early roles in telecom and radio operations give him a rare mix of disciplined engineering practices and real-world systems/ops experience.
10 years of coding experience
11 years of employment as a software developer
Master of Science / Magister Inżynier, Electronics and telecommunication, Master of Science / Magister Inżynier, Electronics and telecommunication at AGH University of Krakow
Polish, English
Stackoverflow
1reputation
0reached
0answers
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Github Skills (19)
seo10
python10
django10
nextjs10
wpgraphql10
wordpress-graphql10
graphql10
backend10
react10
testing9
javascript9
typescript9
permission9
typescript-types9
rights-management9
Programming languages (4)
Github contributions (5)
saleor/saleor
Sep 2017 - Jun 2020
Saleor Core: the high performance, composable, headless commerce API.
Role in this project:
Backend Developer
Backend DeveloperContributions:454 commits, 45 PRs, 425 pushes in 2 years 10 months
Contributions summary:Michał primarily focused on backend development, contributing to the `saleor/saleor` repository. The commits demonstrate a focus on improving the product attribute model and tests, and implementing features related to permissions management, including the addition of a staff section in the dashboard. The user's work involved working with Python, Django, and potentially related e-commerce specific code.
pythonecommercedjangoheadless-ecommerceshopping-cart
saleor/saleor-storefront
May 2019 - May 2019
A GraphQL-powered, NextJs-based, PWA storefront for Saleor. IMPORTANT: This project is [DEPRECATED] in favor of saleor/react-storefront soon to become our default demo and storefront starter pack.
Role in this project:Front-end Developer
Front-end DeveloperContributions:9 commits, 1 PR, 6 pushes in 1 day
Contributions summary:Michał primarily focused on improving the storefront's front-end code. Their contributions included fixing type-related issues, reordering imports, and adding structured data for SEO on the homepage and product pages. They also addressed tslint issues and removed unused code, indicating a focus on code quality and maintainability. The changes involved modifying React components, SEO-related files, and data structures related to product information.
saleorreactcommercesaleor-pwasaleor-storefront
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