Олег

Oleh Rodionov
Riga, Latvia
Golang developer
Email: [open contact info](look above in the "contact info" section)
mob, whatsupp: [open contact info](look above in the "contact info" section)
telegram, viber: +308957039600

Experienced Golang Developer and DevOps Engineer with over 14 years in IT, including large-scale
system deployment, backend development, and infrastructure automation for public transportation
systems.

Experience
LLC Symbol Transport — Golang Developer
https://www.symboltransport.com
March 2022 – September 2025 | Kyiv, Ukraine
September 2025 – Present | Riga, Latvia
A company specializing in the development, implementation, and maintenance of automated fare
collection systems for urban public transportation.
• Developed a system for configuring equipment for validating transport and bank cards.
• RAG-service for searching information on company documentation.
• Designed and implemented a preprocessing system for bank card payment operations using
OpenWay, Tieto protocols.
• Implemented RabbitMQ for deferred authorizations of banking transactions, which increased
system performance by 50%.
• Developed an authorization server using JWT.
• Created a service for automated Jira task handling, reducing support workload by 20%.
• Integrated Prometheus and Grafana for observability, increasing system uptime to 80%.
Key Technologies:
Go, Fiber, Gin, gRPC, JWT, PostgreSQL, Redis, PocketBase, Prometheus, Grafana, RabbitMQ, Git

LLC Symbol Transport — DevOps Engineer | Head of Technical Support Department
February 2017 – March 2022 | Kyiv, Ukraine
Progressed from Technical Support Engineer to Head of Department. Led backend development and
system integration efforts in a large-scale AFC platform used by multiple cities.
• Managed the implementation, deployment and technical support of ~20 urban transit systems.
• Managed and provisioned fare equipment configuration software using Ansible, which reduced
the project implementation schedule by more than 3 times.
• Implemented the practice of using Docker Containers for system deployment and application
development.
• Designed system architecture and implemented CI/CD pipelines.
• Implemented the use of Jira Service Desk for quick response to user issues.
• Implemented a system for monitoring service performance and alerting about critical failures,
which increased the system's fault tolerance to 99%
Key Technologies:
PostgreSQL, Oracle, MySQL, Jenkins, Docker, Ansible, GitLab CI/CD, Bash, YAML, Nginx, Linux,
Jira, Zabbix

LLC RKTK — Software Engineer
http://www.rktk.com.ua
July 2009 – January 2017 | Rubizhne, Ukraine
Cardboard and packaging production company.
• Introduced electronic journals for tracking production metrics, reducing complaints by 30%.
• Automated packaging line processes, eliminating manual input errors.
• Developed vehicle license plate recognition at raw material intake.
• Created a production planning system, decreasing downtime by 25%.
• Designed warehouse product mapping system to speed up retrieval.
• The combination of the developed services made it possible to automate the production process
by reducing the number of service personnel by 50%
Key Technologies:
C, Delphi, Microsoft Access (VBA), SQL Server

Education
Volodymyr Dahl East Ukrainian National University
B.Sc. in Computer Technologies
September 2004 – July 2009 | Rubizhne, Ukraine

Languages
• Ukrainian — Native
• English — Upper-Intermediate (B2)