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I am a seasoned Software Engineer with over 15 years of experience building high-performance systems in fintech, gaming, and broadcasting. I combine deep technical mastery with the ability to drive architectural change and to lead distributed, cross-functional teams.…

Konstantin Mamalakis

Developer, Full Stack Developer, Game Developer, +5

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I am a seasoned Software Engineer with over 15 years of experience building high-performance systems in fintech, gaming, and broadcasting. I combine deep technical mastery with the ability to drive architectural change and to lead distributed, cross-functional teams.…

Available to hire

I am a seasoned Software Engineer with over 15 years of experience building high-performance systems in fintech, gaming, and broadcasting. I combine deep technical mastery with the ability to drive architectural change and to lead distributed, cross-functional teams.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Language

Amharic

Advanced

Aragonese

Advanced

Javanese

Advanced

Work Experience

Senior Fullstack Engineer at Stripe

October 1, 2023 - Present

Discovered and fixed business logic flaws affecting over $10M in cash flows and initiated architectural changes to prevent recurring discrepancies. Refactored internal and external APIs to unify feature sets, reducing duplicate code paths by 35% and improving maintainability. Reduced support tickets by 80% through UX improvements, comprehensive documentation, and enhanced internal tooling.

Senior Software Engineer at Boffins

October 1, 2023 - August 31, 2025

Overhauled message-broker and distributed file systems to improve latency and throughput. Built a video editor from scratch using WebGL shaders enabling real-time editing. Deployed AI-powered solutions including video captioning, image labeling, and translation. Contributed upstream patches to Chromium, FFmpeg, and key npm libraries. Automated team workflows, saving over 15 hours per week in manual processes.

Embedded Software Engineer at EKT

March 1, 2018 - August 31, 2025

Led the design and implementation of version 2 public API achieving 100% adoption by existing customers. Contributed upstream patches to Chromium, WebKit, and Qt. Assisted in recruiting, training, and leading a globally distributed 50-person team.

Software Engineer at QBS

July 31, 2013 - August 31, 2025

Delivered MVP on time and on budget, securing company acquisition. Recruited, mentored, and led a 7-person cross-functional team. Identified and fixed critical security vulnerabilities through penetration testing.