Sergey Kovalov
Senior Software Engineer @Sophos
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WORK HISTORY
Senior Software Engineer @Sophos
Vancouver, BC, CA
Senior Software Engineer working on Sophos’s Managed Detection and Response (MDR) platform - a large-scale, microservices-based cybersecurity system operating across 11 AWS regions and integrated with multiple Sophos products.Backend & Platform Development- Designed and maintained core backend services and REST APIs supporting high-volume security detections and threat case management- Migrated legacy Sinatra services to modern Rails microservices, improving performance and maintainability- Optimized data access patterns and service-layer interactions across multiple systems.Infrastructure & Developer Productivity- Implemented AWS SES–based email workflows for Ops and customer communications- Extended and maintained shared Ruby gems used across MDR services- Contributed to platform scalability, stability, and security.AI Development & Tech Stack Transition- Transitioned to TypeScript (NestJS) and React to build a new Ops platform around a redesigned security core- Adopted AI-assisted development (Cursor) to quickly ramp up on a new stack and deliver production-ready features, while reviewing and refining AI-generated code to maintain high quality.Technical Leadership & Collaboration- Took ownership of features end-to-end, from breaking down epics into technical stories to implementation and delivery- Worked closely with PMs, frontend engineers, and QA, contributing to design discussions and code reviews- Increasingly involved in cross-team coordination and delivery, moving toward staff-level responsibilities.
EDUCATION
Donetsk National University
Master's degree, Applied Mathematics
Online-school "Thinknetica"
Computer Programming
ABOUT SERGEY KOVALOV
I’m a Senior Software Engineer with over 12 years of experience in software development, specializing in Ruby on Rails for the past 8+ years. My expertise includes system architecture, domain analysis, API design, and long-term support of complex applications.Backend-focused engineer evolving into AI-enabled full-stack development with faster end-to-end feature delivery, leveraging my problem-solving mindset and deep technical knowledge to build scalable, high-performance applications.Key Skills & Expertise Backend Development – Ruby on Rails, RDBMS, API Design, Microservices Performance & Scalability – System Performance and Optimization, Troubleshooting DevOps & Infrastructure – Docker, CI/CD, Cloud Environments, Git Collaboration & Leadership – Strong communication, productivity-driven, team-orientedI thrive in fast-paced, collaborative environments and am always open to challenging projects that push me to grow. If you\'re looking for a seasoned RoR engineer who can drive technical excellence and system scalability, let’s connect!
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