Kiryl Dumanski Email & Phone Number

Poland

Poland

Responsibilities:- Led a team of 8 developers to deliver high-quality, scalable features on schedule.- Collaborated with stakeholders to align technical solutions with business needs.- Built and maintained async pipelines using Kafka for reliable and efficient message processing.- Developed and optimized gRPC-based microservices to enable fast and secure communication.- Managed complex Kubernetes deployments, including operators and stateful applications.- Enhanced PostgreSQL performance utilizing views, triggers, and real-time updates.- Established CI/CD pipelines using GitLab CI/CD to ensure consistent and reliable deployments.Achievements:- Improved team productivity by introducing coding standards and streamlined workflows.- Delivered critical project milestones ahead of schedule, enabling faster integration of features into the overall business ecosystem.- Designed and implemented a robust messaging system using Kafka, enabling real-time communication and seamless integration between microservices.

Responsibilities:- Refactored legacy codebases to improve maintainability and performance.- Optimized PostgreSQL queries, indexes, and schema design for better performance.- Implemented caching strategies with Redis to reduce latency and improve system performance.- Mentored junior developers, sharing best practices and providing technical guidance.- Integrated third-party APIs and SDKs to extend application functionality.- Deployed and managed Kubernetes workloads using Helm.- Wrote comprehensive unit and integration tests to ensure software reliability and code quality.Achievements:- Successfully onboarded and mentored two new team members, reducing their ramp-up time by 50% through hands-on training and well-documented processes.- Boosted platform scalability, ensuring the system could handle a significant increase in concurrent users without performance degradation.- Played a crucial role in migrating from a monolithic to a microservices architecture, improving system maintainability, agility, and enabling faster development cycles.

Responsibilities:- Worked on database design and optimization.- Designed and implemented background task processing with Celery and Redis.- Collaborated with team members to implement microservices-based architecture.- Participated in code reviews to ensure adherence to coding standards and improve code quality.- Worked with cloud technologies (AWS), deploying Python applications on EC2 instances.- Integrated third-party libraries and services to extend application capabilities.- Enhanced application performance by profiling and optimizing code execution and memory usage.- Helped design and implement caching mechanisms using Redis to reduce response time.- Migrated Python version from 3.8 to 3.11, improving compatibility and performance.- Wrote unit and integration tests to ensure system reliability, accuracy, and performance.Achievements:- Successfully contributed to the design and launch of key features, including payroll automation and personnel management functionalities, improving the efficiency of HR teams.- Reduced the processing time for payroll calculations by 20% through optimization of database queries and backend logic.- Played a significant role in bug fixes and system improvements, ensuring high availability and reliability, leading to a 95% customer satisfaction rate.

I began my IT career as a freelancer on Upwork, where I worked on a wide variety of projects, gaining hands-on experience in developing custom software solutions tailored to clients' unique needs. As a self-motivated and results-driven professional, I managed projects end-to-end, from gathering requirements to delivering high-quality solutions on time.Responsibilities:- Developed and delivered custom backend solutions, including API development, for small to medium-sized projects.- Worked closely with clients to gather requirements, ensuring that their needs were met with tailored solutions.- Implemented basic best practices for clean code, version control, and testing, learning and adapting as the project progressed.Achievements:- Successfully completed 3 projects, delivering quality solutions that exceeded client expectations.- Consistently met project deadlines, improving client retention rates and expanding my professional network.- Gained strong expertise in different Python related technologies including Databases, DevOps e.t.c, allowing me to tackle diverse technical challenges with confidence.Freelancing on Upwork was a formative phase of my career, allowing me to develop strong technical skills, effective communication, and a proactive approach to problem-solving. This experience laid the foundation for my growth as a software developer, equipping me with the ability to quickly adapt to dynamic challenges and consistently deliver high-quality results.