Filip Sobczak
Frontend Developer at Equal Experts
Warsaw, Masovian Voivodeship, Poland
Summary
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SeniorFilip Sobczak is a Senior Frontend Developer with 15+ years building scalable, user-focused web applications across startups and large enterprises from Warsaw. He blends deep frontend expertise (AngularJS, React) with full-stack experience in Node.js and AWS, having led architecture and delivery at companies like Trainline, Wayfair, and PPRO. Filip has a track record of shipping production-ready systems, from founding a social apps startup to developing Trainline’s open-source Environment Manager for CD automation. He contributes to open-source tooling as a lead front-end engineer and has improved REST API testing in projects like chakram by strengthening cookie handling and multipart uploads. Known for mentoring teams and evangelising best practices, he pairs hands-on coding with pragmatic architecture choices. His background combines formal CS training (MSc with distinction) with a practical, delivery-focused approach to complex web platforms.
15 years of coding experience
Github Skills (8)
mochajs10
nodejs10
javascript10
rest10
api-testing10
test-automation10
bdd9
chai9
Programming languages (3)
Github contributions (5)
dareid/chakram
Oct 2015 - Jan 2016
REST API test framework. BDD and exploits promises
Role in this project:
Back-end Developer
Back-end DeveloperContributions:6 commits, 1 PR, 4 comments in 3 months
Contributions summary:Filip primarily focused on enhancing the `chakram` testing framework to improve its functionality related to cookies and request defaults. Their work involved modifying the `methods.js` file to handle request jars and cookie persistence more effectively, particularly when using the `jar: true` option. They also introduced and refined unit tests to validate the behavior of cookie handling within the framework, ensuring accurate testing of cookie-related functionalities. Finally, the user added features such as file posting through multipart/form-data.
bddrestrest-apitest-frameworkapi-test
filso/PHP-LastFm-Minimal-API
Jun 2011 - Sep 2014
Contributions:11 commits in 3 years 3 months
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