Senior Go Engineer — Fintech Payments Gateway Platform

Colibrix One; Warsaw (IN); On-site; USD 120,000 - 150,000; Full time

Benefits offered by this job

Collaborative culture

Learning & development

Growth opportunities

Job summary

COLIBRIX ONE is seeking an experienced Go Engineer to join our payments-focused engineering team. You will design and develop Go-based services for our payment gateway, ensuring high availability, security, and scalable performance.

You’ll translate business needs into robust technical specifications, collaborate across teams, and contribute to architecture decisions while mentored by senior engineers.

Qualifications

• 3–5 years of Go development experience focused on backend systems and around 5 years in fintech applications.
• Understanding of distributed systems, microservices architecture, and API design, including REST/RPC transports.
• Experience with SQL and NoSQL databases, message brokers (Kafka, NATS), and caching systems.
• Familiarity with CI/CD practices and tools, preferably GitLab.
• Experience with the AWS cloud platform.
• Security‑by‑design mindset and knowledge of PCI DSS, GDPR as applicable.
• Strong communication and ability to explain complex technical ideas.
• Fluency in written and spoken English and Russian.

Responsibilities

• Design and develop Go-based services for the payment gateway and related fintech systems, focusing on stability and correct handling of financial operations.
• Translate business requirements into technical specifications and propose concrete solutions at service/module level, including API design and data models.
• Build solutions in compliance with security requirements and secure inter-service communication.
• Analyze and optimize service performance, including profiling and efficiency considerations.
• Participate in microservices architecture discussions: boundaries, communication, load balancing, queues/streaming, data storage approaches.
• Produce maintainable, testable code with unit and integration tests.
• Participate in code reviews and provide constructive feedback.
• Contribute to technical discussions with practical solutions within current architecture.

Skills

Go development

Backend systems

Distributed systems

API design

REST/RPC

Security-by-design

Performance optimization

Observability

Team collaboration

Tools

Kafka

NATS

GitLab CI/CD

AWS

Prometheus

Grafana

OpenTelemetry

Job description

COLIBRIX ONE is seeking an experienced Go Engineer to join our payments-focused engineering team. You will design and develop Go-based services for our payment gateway, ensuring high availability, security, and scalable performance.

You’ll translate business needs into robust technical specifications, collaborate across teams, and contribute to architecture decisions while mentored by senior engineers.