Mert Tümer
Senior Back End Engineer at Foodji
Munich, Bavaria, Germany
Summary
🤩
Rockstar🎓
Top SchoolMert Tümer is a Senior Back End Engineer based in Munich with a decade of software experience and 8+ years delivering production-ready backend and frontend services across startups and product teams. He specializes in Go, C#, and distributed systems patterns (CQRS, gRPC, WebSocket) and has deep practical knowledge of scaling, monitoring (New Relic, Sentry), CI/CD and high-availability architectures. Mert blends full-stack fluency (React/Next/Nest) with strong fundamentals in data structures, SOLID, and design patterns to ship resilient services using Docker and Kubernetes. He has hands-on database experience across PostgreSQL, MongoDB and K/V stores, and a track record of fixing hard bugs and improving performance in well-known open-source projects such as LibreOffice and Collabora Online. Comfortable working in cross-functional Agile teams, he pairs product-focused feature delivery with observability-driven maintenance. Colleagues rely on him to translate complex system requirements into pragmatic, testable implementations.
10 years of coding experience
7 years of employment as a software developer
Lisans Derecesi Bilgisayar Mühendisliği, Lisans Derecesi Bilgisayar Mühendisliği at Çanakkale Onsekiz Mart University
Github Skills (19)
javascript10
c-language10
user-interface10
android-developer10
front-end-development10
android10
html10
android-developers10
cprogramming-language10
libreoffice9
performance-optimization9
optmization9
optimisation9
optimization9
mobile-development8
Programming languages (10)
Github contributions (5)
CollaboraOnline/online
May 2020 - Sep 2022
Issue tracker only. Active development is on Gerrit at https://gerrit.collaboraoffice.com/.
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:94 reviews, 446 commits, 495 PRs in 2 years 4 months
Contributions summary:Mert contributed to both the front-end and back-end components of the Collabora Online office suite. They implemented features related to handling read-only files, including the "save as" functionality for plain text files, and ensuring correct behavior when switching between edit and view modes, which involved modifications to the front-end (JavaScript and HTML) and the Android application layer. Furthermore, the user addressed issues with the user interface, such as fixing display problems with the menu bar and adjusting element positioning for mobile and desktop use. They also contributed to the core functionality.
gerritlibreofficeproductivityjavascriptcpp
LibreOffice/core
Apr 2016 - Sep 2022
Read-only LibreOffice core repo - no pull request (use gerrit instead https://gerrit.libreoffice.org/) - don't download zip, use https://dev-www.libreoffice.org/bundles/ instead
Role in this project:Back-end Developer
Back-end DeveloperContributions:344 commits in 6 years 5 months
Contributions summary:Mert primarily contributed to the LibreOffice core codebase by fixing bugs and implementing features related to the LibreOfficeKit (LOK) integration. Their commits addressed issues like incorrect text selection handling, comment display problems, and the handling of CSV sheet names on Android. They also worked on optimizing performance by removing redundant calls and adjusting text insertion behavior. Moreover, they implemented LanguageTool grammar checking integration, further enhancing the software's capabilities.
gerritlibreofficetdf
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