go developer for payment gateways

COLIBRIX ONE is a licensed Electronic Money Institution and financial technology company providing payment solutions for Payment Service Providers, Electronic Money Institutions, and neobanks across the EU and the UK. Its services include global card processing, digital wallet infrastructure, cross-border merchant accounts, alternative payment methods, and corporate accounts.

• Design and develop Go-based services for the payment gateway and related fintech systems, focusing on stability, fault tolerance, and correct handling of financial operations;
• Translate business requirements into technical specifications and propose solutions at the service and module level, including API design, data models, and integrations with external providers;
• Build solutions compliant with security requirements, including PCI DSS, sensitive data protection, and secure inter-service communication;
• Analyze and optimize service performance through code profiling, concurrency handling, and efficient data storage and network interactions;
• Participate in microservices architecture, including service boundaries, communication patterns, load balancing, error handling, queues, streaming, and data storage approaches;
• Produce maintainable and testable code with appropriate unit and integration test coverage according to team development standards;
• Participate in code reviews, evaluate implementations, identify issues, and provide constructive feedback aligned with technical requirements;
• Contribute concrete and practical solutions to technical discussions within the current architecture and development processes.

• 3–5 Years of Go development experience focused on backend systems;
• Around 5 years of experience working with fintech applications;
• Understanding of distributed systems, microservices architecture, and API design, including REST/RPC transports;
• Experience with SQL and NoSQL databases, message brokers such as Kafka and NATS, and caching systems;
• Familiarity with CI/CD practices and tools, preferably GitLab;
• Experience working with the AWS cloud platform;
• Ability to contribute expertise and collaborate on technical solutions;
• Strong communication skills and the ability to explain complex technical ideas to colleagues with varying levels of technical background;
• Fluency in written and spoken English and Russian;
• Security-by-design mindset with the ability to build security considerations into every stage of solution design;
• Understanding of fintech regulatory requirements, including PCI DSS and GDPR;
• Experience in performance optimization and building high-availability systems;
• Experience with observability tools for logging, metrics, and tracing, including Prometheus, Grafana, and OpenTelemetry;
• Experience integrating with external payment providers, processors, or anti-fraud systems.

• Competitive salary and benefits package;
• Continuous learning and development opportunities;
• Flexible work arrangements to support work-life balance;
• Employment will be under the appropriate legal entity based on the role and location.