Denis Yermakov
Lead Rust Clojure Engineer at harmonizeHR
Krakow, Lesser Poland Voivodeship
Summary
🤩
Rockstar🎓
Top SchoolDenis Yermakov is a Lead Rust/Clojure Engineer based in Krakow with over a decade building high-load backends and mobile apps across startups and enterprise teams. A long-time functional programming enthusiast, he blends deep experience in Clojure, Rust, Scala, Haskell and C to design performant systems, compilers, interpreters and type-aware tooling. Currently driving Rust+Clojure work at harmonizeHR, his day-to-day spans async Rust (Tokio, Axum), DataFusion/Arrow, Flow-Based Programming and reactive front-ends. He has led teams at Agiliway and contributed senior engineering across firms like ShiftLeft and Apptopia, often bringing property testing and parser design to production problems. Denis explicitly avoids crypto/NFT roles and prefers work that leverages formal methods and language-level thinking to solve practical performance and correctness challenges. An experienced speaker, he’s presented on functional parsers, property testing and bringing Scala/Haskell ideas into mobile development.
10 years of coding experience
17 years of employment as a software developer
Bachelor of Arts, Arts, Bachelor of Arts, Arts at Rivne Institute of Slovenian LanguagesComputer Academy "STEP"Cisco iExec Enterprise Essentials, Cisco iExec Enterprise Essentials at Cisco InstituteCisco Entrepreneur Institute
English, Ukrainian
Github Skills (23)
tla10
property-graph10
graph10
validation10
query-language10
specification10
dataflow9
java9
scala9
kotlin9
ghidra9
code-analysis9
cpp9
graphql8
data-structures8
Programming languages (1)
Github contributions (5)
ShiftLeftSecurity/codepropertygraph
Aug 2019 - Apr 2020
Code Property Graph: specification, query language, and utilities
Contributions:29 commits, 32 PRs, 50 pushes in 8 months
queryvalidationcode-property-graphspecificationtla
ShiftLeftSecurity/overflowdb
Sep 2019 - Mar 2020
Contributions:13 commits, 14 PRs, 14 pushes in 6 months
bigtableoverflowdbdatabaseshiftleftheap
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.