Oleg Balunenko

Tech Stack: Go, REST, gRPC, Buf, Payment Systems (Primer, Stripe), PostgreSQL, Kafka, AWS, Retool

• Refactored segment management and cohort configuration, introducing intelligent fallback mechanisms.
• Interviewed candidates for open positions.
• Implemented a package for driver-agnostic integration tests for the database storage layer with multiple databases and migration sources
• Standardised gRPC and REST API approach and documentation across multiple Go microservices, ensuring consistent design patterns and better developer ergonomics.
• Upgraded development standards by improving CI/CD pipelines and code quality through standardised tools.

Tech Stack: Go, Docker, K8S, gRPC, REST, NATS, PostgreSQL, MongoDB, Redis

• Developed and maintained scalable applications using Golang, ensuring high performance and reliability.
• Enhanced the CI process in the development team by implementing integration test support and running linters, resulting in a 56% improvement in code quality
• Performed risk and impact assessments on the existing system
• Involved in strategic tasks for expanding business in new regions.

https://www.mentoring-club.com/the-mentors/oleg-balunenko

Mentoring Software Engineers.

Tech Stack: Go, Docker, K8S, Kafka, RPC (TWIRP), PostgreSQL, ScyllaDB, ClickHouse, Redis, GCP

• Integrated best practices for code review to ensure continuous process improvement, resulting in a 30% improvement in code quality
• Improved database consistency by implementing migrations processes for ClickHouse, reducing inconsistency bugs by 40%.
• Improved observability of services by integrating telegram notifications sent in case of critical errors, resulting in reducing time reaction on production incidents by 45%
• Established a test environment for ARM64 architecture laptops across all teams and made it possible to run tests locally.
• Improved retro and daily meetings by proposing best practices to the manager.

Tech Stack: Go, C, Docker, K8S, REST, Kafka, PostgreSQL, Elasticsearch, Redis, AWS

• Increased the sales team's performance by 30% by implementing automation instruments and proposing new features to the product.
• Improved service performance by 40%, implementing asynchronous job execution with distributed lock.
• Improved the performance by 26% of the service responsible for site SEO by improving building and rendering algorithms.

Tech Stack: Go, Docker, K8S, gRPC, REST, BigQuery, Kafka, PostgreSQL, MySQL, Redis, GCP

• Managed one cross-functional team.
• Designed and delivered a micro-service-based system for A/B ASO tests from scratch.
• Improved database integration tests across all teams by implementing a library that makes them easier to set up with all migrations and safe to execute, increasing test coverage to 85% and reducing bugs by 40%.
• Integrated third-party APIs and systems into services.

Tech Stack: Go, Docker, K8S, gRPC, REST, Kafka, NATS, RabbitMQ, MySQL, PostgreSQL, Redis, AWS, GCP

• Leaded two cross-functional teams.
• Participated in presale project estimations.
• Interviewed candidates for open positions.
• Trained interns and mentored juniors.
• Participated as a speaker in internal meetups and training.
• Integrated third-party payment services and banks.

Tech Stack: Go, Docker, K8S, REST, Kafka, Redis, GCP

• Developed new microservices in Golang, which use Kafka for communication with each other and store data in Cassandra and Redis
• Developed scripts and cross-platform tools that improved the QA process (Bash + Golang)
• Implemented a Golang tool for map validation, which is running live on customer’s environments
• Refactored existing code base to follow DRY and SOLID principles and improved testing process and coverage.
• Improved CI process and provided set-up for new projects.

• Developed scripts in Bash that helped the QA team decrease time spent preparing test environments and creating bug reports.
• Investigated new tools for testing that can improve the testing process and provided training for the team on how to use them.
• Integrated best practices to ensure continuous testing process improvement.
• Interviewed QA candidates for open positions.
• Trained and mentored junior QA.

• Proposed solution on how using Xray with Jira can improve the company’s QA process.

Responsibilities:- Feature Development & Ownership: Design, develop, and maintain high-load backend services using Go, taking responsibility for the product quality and technical decisions.- System Architecture: Create detailed technical design documentation, architect scalable solutions, and maintain high-performance APIs (specifically gRPC).- Testing & Quality: Ensure code reliability by writing unit tests in Go and integration tests using Python.- Infrastructure & Deployment: Manage your own services in Kubernetes using Helm, and leverage Google Cloud Platform (GCP) services.- Collaboration: Actively interact with cross-functional teams including Game Design, Data Analytics, Client Developers, QA/Load Testing, and DevOps to align technical solutions with product goals.- Processes: Participate in team rituals (dailies, grooming, planning, retrospectives) and contribute to continuous improvement of our development culture.

Provide feed and water to animals in 3 districts of Tbilisi.