Illia Barkov

I built and refined robust, scalable systems that power the platform's comprehensive suite of talent solutions, covering everything from candidate screening and selection to leadership development and organizational transformation.

As a senior back-end Ruby on Rails developer, I prioritized keeping the platform secure, high-performing, and prepared for future growth. I engineered and optimized back-end solutions to handle large volumes of data and user traffic, directly supporting the platform's capacity to serve thousands of organizations and process millions of assessments annually.

I led key maintenance and upgrade initiatives, advancing Ruby on Rails and Ruby versions to proactively maintain the platform's security and performance. Additionally, I developed critical components within our complex, multi-language microservice infrastructure, ensuring high availability for a platform supporting talent lifecycles across a diverse international client base.

My contributions supported the platform's proven ability to improve clients' quality of hires and cultivate stronger leaders.

I contributed to a bug bounty and vulnerability coordination platform dedicated to the Web3 and blockchain space. The platform connects a global community of over 45,000 ethical hackers with blockchain protocols and smart contract projects. The platform has facilitated over 25,000 reports and paid over $15.7 million to hackers, helping proactively identify and resolve critical security vulnerabilities.

In my role, I built and maintained secure, high-performance systems that are essential to the cybersecurity ecosystem in the crypto industry. Through back-end development and DevSecOps initiatives, I significantly enhanced the platform's technical maturity, security, and operational efficiency.

I ensured high availability and robust security for a leading bug bounty platform supporting critical Web3 projects, effectively managing risk in a rapidly evolving industry. My efforts directly contributed to the company achieving ISO 27001 certification, demonstrating its commitment to information security excellence.

Additionally, I spearheaded mentorship programs for developers, sharing best practices in containerization, efficient local development, and essential security principles.

I architected and developed a high-performance distributed streaming platform for IPTV services, serving real-time video content delivery and streaming operations. I built a custom Nginx load balancing module using Lua scripting, improving traffic distribution efficiency by 70% and enabling seamless handling of concurrent video streams across multiple content delivery nodes.

I re-designed the entire monolithic architecture into containerized microservices using Docker and Kubernetes, achieving 40%+ performance gains and 99% uptime reliability. I also implemented robust authentication systems, integrated Stripe payment processing for subscription management, and deployed comprehensive monitoring for real-time observability of streaming performance.

The platform utilized Ruby on Rails and Sinatra for back-end services, PostgreSQL and Redis for data persistence and caching, with RESTful JSON APIs enabling service communication. I deployed it on Google Cloud Platform with CI/CD pipelines through Jenkins, ensuring scalable infrastructure that could handle high-volume video streaming loads and real-time content delivery across distributed nodes.