Sergei Kozub Email & Phone Number

Amsterdam, Nh, Nl

Ирландия

- Managed a multidisciplinary team of up to 6 people, including frontend, backend, DevOps, and mobile development, ensuring the successful delivery of key projects.- Implemented end-to-end analytics, optimizing manager workflows, reducing analysis time by 25%, and improving client interactions.- Automated tasks, reducing manual work by 40%, allowing the team to focus more on strategically important tasks.- Participated in strategic planning, contributing to the company's efficiency growth through process optimization and more accurate data analysis.- Set up remote team operations, reducing downtime and improving coordination despite time zone differences.- Developed the team through regular one-on-one meetings, increasing productivity and reducing employee burnout.- Organized the hiring and onboarding process, ensuring smooth integration of new specialists into the team.- Optimized development processes using neural networks, accelerating project delivery by 20%.- Collaborated with other departments to develop cross-functional solutions, leading to reduced operational costs and strengthened the company's competitive position in the market.

Ирландия

- Developed and maintained microservice applications in Go, increasing system resilience and reducing request processing time by 30%. - Implemented CI/CD and containerization, reducing release times by 40% and improving quality control at all stages of development. - Transitioned architecture from monolithic to microservices and event-driven, enhancing system scalability and flexibility. - Integrated payment systems via API, expanding platform functionality and growing the client base. - Set up monitoring and logging, improving system oversight and accelerating issue resolution. - Created and deployed a custom Telegram client in Go along with several bots, streamlining internal communications and automating processes.Achievements: - Developed and implemented automatic and semi-automatic testing, including unit, regression, integration, and system testing. - Built a universal API request constructor, simplifying integration with external services. Authored full documentation and provided training for new hires. - Developed a custom Telegram client in Go and multiple Telegram bots, improving user interaction.

Хайфа, Хайфский Округ, Израиль

Established and led the QA department. Trained junior engineers in Web fundamentals, Golang, PHP, JavaScript, and the basics of manual testing and end-to-end test automation using TestCafe.

Remote With Germany, Israel, Cyprus

Worked within a team on multiple projects.Key responsibilities: - Refactored a monolithic application from PHP (Laravel) to Golang. - Developed a proxy for a CRM system. - Created Golang microservices for multithreaded data transmission to external services. - Built a Golang microservice for creating data container queues. - Developed a Golang microservice for sending SMS through various providers from the CRM. - Integrated multiple payment providers into the CRM using Golang microservices. - Migrated data from various databases to a customer’s PostgreSQL database using Golang microservices. - Made minor updates to an existing project on PHP/Laravel 4.2.Technologies used: - Golang: GoModules (vgo)/Dep, gRPC, Protobuf, Echo server, Gorm, RabbitMQ - PHP: Laravel - Databases: PostgreSQL - VCS: Git (Bitbucket, GitHub) - Other: Docker, Ubuntu

Moscow

I progressed from an intern to a Junior+ developer during my time at Web2Age. While working there, I developed an interest in Golang. Throughout my time, I learned the fundamentals of developing and maintaining e-commerce websites.