Denis Kayumov
Senior Software Engineer at Blacklane
Berlin, Germany
Summary
👤
Senior🎓
Top SchoolDenis Kayumov is a Senior Software Engineer based in Berlin with 8 years of experience building backend systems and shipping mission-critical services across e‑commerce and finance. He has repeatedly led efforts to replace legacy platforms with single points of truth—most recently shaping pricing, product management, and AI-first procurement tools at HelloFresh—and now contributes at Blacklane. Denis specializes in backend architecture, distributed caching, code generation, and introducing Go and productivity tooling to teams, consistently improving performance and developer velocity. He balances hands-on implementation with process and team improvements, has acted as interim team lead and interviewer, and brings a practical background in secure data integrations and compliance from fintech and government-connected projects. An adaptable collaborator, he’s known for turning messy legacy problems into maintainable, testable systems while staying curious about new technologies.
8 years of coding experience
5 years of employment as a software developer
Master's degree Computer Science, Master's degree Computer Science at Moscow State University of Economics, Statistics and Informatics (MESI) 
Russian, English, German
Github Skills (58)
expressjs10
middleware9
golang9
nodejs9
auction9
rest-api9
fiber9
go8
checker8
world-of-warcraft8
wsdl7
soap7
soap-client6
api6
validation6
Programming languages (5)
Github contributions (5)
sotanodroid/wezario
Apr 2020 - Jan 2021
Simple command-line tool to get current weather
Contributions:23 commits, 6 PRs, 19 pushes in 9 months
command-line-toolcommand-linecurrent-weathercli
dog-sky/auctioneer
Dec 2020 - Dec 2021
World of Warcraft auction house API to search Items
Contributions:17 releases, 2 reviews, 220 commits in 11 months
apihousewow-auction-houseblizzard-apiwarcraft
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