[Hiring] Senior Go Engineer @Colibrix One

Role Description

We're seeking an experienced Go Engineer to join our team and contribute significantly to our payment gateway product. The ideal candidate will bring deep technical expertise, a collaborative mindset, and the ability to influence and mentor team members through knowledge and experience rather than formal authority.

About the project:

• Payment gateway solutions - fintech product that securely connects merchants and financial institutions to process online payments in real time.
• Handles transaction routing, encryption and tokenization, fraud and risk checks, and integration with acquirers, payment aggregators, and alternative payment methods.
• Supports high availability, scalability, and compliance with PCI DSS and PSD2.

Tech stack:

• Go
• PostgreSQL/MySQL
• MongoDB/Redis
• Kafka
• NATS
• REST/gRPC
• AWS
• GitLab CI/CD
• Prometheus
• Grafana

Key responsibilities:

• 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 clear technical specifications and propose concrete solutions at the service and module level, including API design, data models, and integrations with external providers.
• Build solutions in compliance with security requirements, including PCI DSS, proper handling of sensitive data, and secure inter-service communication.
• Analyze and optimize service performance, including code profiling, concurrency handling, and efficiency of data storage and network interactions.
• Participate in the architecture of microservices: service boundaries, communication patterns, load balancing, error handling, queues/streaming, and data storage approaches.
• Produce maintainable, testable code with appropriate unit and integration test coverage, following team development standards.
• Participate in code review as part of the development process: evaluate implementations, identify issues, and provide constructive feedback aligned with technical requirements.
• Contribute to technical discussions by offering concrete, practical solutions within the current architecture and development processes.

Qualifications

• 3–5 years of Go development experience focused on backend systems, and around 5 years of experience working with fintech applications.
• Understanding of distributed systems, microservices architecture, and API design, including REST/RPC transports.
• Experience working with SQL and NoSQL databases, message brokers (Kafka, 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 with the team 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.
• Experience in the fintech domain.
• Security-by-design mindset: ability to design solutions with security considerations built in at every stage.
• Understanding of regulatory requirements in the fintech space (e.g., PCI DSS, GDPR).
• Experience in performance optimization and building high-availability systems.
• Experience with observability tools: logging, metrics, tracing (Prometheus, Grafana, OpenTelemetry).
• Experience integrating with external payment providers, processors, or anti-fraud systems.

Benefits

• Opportunity to shape the future of fintech solutions within a growing company.
• Collaborative, horizontal team structure that values your expertise and ideas.
• Continuous learning and development opportunities to enhance your skills and career growth.
• Competitive salary and benefits package.
• Flexible work arrangements to support work-life balance.