Rostislav Rumenov
Quantitative Technology Director
Zurich, Zurich, Switzerland
Summary
🤩
Rockstar🎓
Top SchoolRostislav Rumenov is a quantitative technology leader with a decade of experience building secure, high-performance distributed systems, now directing Quantitative Technology at Qube Research & Technologies in Zurich. His background spans senior engineering and networking leadership at DFINITY—where he contributed to the Internet Computer blockchain’s replica and transport layers—and multi-year tenure at Google, grounding him in large-scale systems and security-first design. He pairs a strong theoretical foundation from MIT in mathematics and computer science with hands-on expertise in back-end engineering, reliability, and operational metrics. Notably, his open-source work on the widely known dfinity/ic repo reflects a focus on preventing unsafe dependencies, hardening error handling, and improving observability—practical details that often distinguish robust production services.
11 years of coding experience
13 years of employment as a software developer
Bachelor's Degree Mathematics with Computer Science, Bachelor's Degree Mathematics with Computer Science at Massachusetts Institute of Technology"Nancho Popovich" High School, Shumen
Bulgarian, English
Github Skills (21)
testing10
it-security10
network-programming10
security10
blockchain10
rust10
http9
tcp9
prometheus9
error-handling9
gossip8
refactor7
performance-optimization7
concurrency7
automated-tests7
Programming languages (4)
Github contributions (5)
dfinity/ic
Nov 2021 - Jan 2023
Internet Computer blockchain source: the client/replica software run by nodes
Role in this project:
Back-end Developer & Security Engineer
Back-end Developer & Security EngineerContributions:287 reviews, 667 commits, 324 PRs in 1 year 2 months
Contributions summary:Rostislav's contributions focus on enhancing the security and stability of the Internet Computer blockchain, specifically by implementing negative dependency checks to prevent the replica software from depending on the `ic-canister-client` library. They also addressed potential issues by introducing panics in the case of unrecoverable errors, and refactoring components of the transport layer. Furthermore, they have been involved in optimizing the HTTP handler and introducing new metrics.
blockchain
rumenov/rumenov.github.io
Sep 2023 - Sep 2025
Contributions:8 pushes in 2 years
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