Serguei Kushnir

• • High-Performance Web Services: Developing and optimizing critical backend web services using C++ to support high-traffic travel payment technologies.

• • System Stability & Debugging: Diagnosing and resolving bugs, including complex race condition issues, within distributed environments to improve overall system reliability.

• • Legacy Refactoring legacy C++ codebase and actively reducing technical debt to improve maintainability.

• • Agile Collaboration: Delivering business-critical features within a fast-paced, international cross functional team.

Development of the endpoint service for analyzing device activity (EDR) Environment: gRPC, protobuf Achievements:

• • Revived an Abandoned Project: Analyzed a neglected and unstable project, identified and resolved critical issues, successfully delivering a stable release and restoring user confidence.

• • Cross-Platform Expansion: Implemented ARM64 cross-compilation support, enabling broader deployment and positioning the product for multi-platform compatibility.

• • Performance Optimization: Utilized Windows Performance Analyzer to identify and resolve key bottlenecks.

• • Memory Leak Resolution: Diagnosed and eliminated persistent memory leaks, significantly enhancing

application stability and preventing system crashes.

• • Codebase Modernization: Refactored outdated code, replacing a custom internal scripting language with C++ for core business logic while retaining the language for configuration only, streamlining development and reducing technical debt.

• • Security and Compliance: Designed and implemented a process-blocking mechanism to restrict unauthorized processes, enforcing security policies and mitigating potential threats.

• • Blue Screen of Death Fix: Diagnosed and resolved a critical issue in driver-level code that caused system crashes, effectively eliminating BSOD occurrences and stabilizing application performance.

• • Feature Implementation: Delivered key features, including windows system logs tracking.

• • Build Process Optimization: Removed all precompiled libraries from the repository and restructured the build process to compile dependencies from source.

• • Rust PoC: Initiated and developed a Proof of Concept (PoC) to migrate performance-critical components of the EDR endpoint service from C++ to Rust, focusing on memory safety, thread isolation, and reducing legacy technical debt.

Description: Development of the desktop application to work with photos. Environment: c++, git, qt, qml, cmake, visual javascript, python, agile, gRPC Application Suite Development: Designed of a Investigated and successfully modernized a legacy project that was previously considered by the