Senior Go Engineer, Payment Gateway Solutions

COLIBRIX ONE

Go Engineer developing secure payment gateway solutions at COLIBRIX ONE. Join a fast-growing team focusing on fintech product development and innovation.

Posted 7/20/2026full-timeWarsaw • 🇵🇱 PolandSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in Go-based service development for fintech applications, with a strong focus on microservices architecture, security compliance, and performance optimization. Proficient in translating business requirements into technical specifications and collaborating effectively with cross-functional teams.

Highest-signal resume keywords

Go DevelopmentMicroservices ArchitectureAPI DesignFintech ExperiencePerformance Optimization

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Hard Skills

Backend DevelopmentDistributed SystemsSQL DatabasesNoSQL DatabasesMessage BrokersCaching SystemsSecurity CompliancePerformance OptimizationUnit TestingIntegration Testing

Soft Skills

Strong Communication SkillsCollaborative Teamwork

Tools & Technologies

AWS Cloud PlatformGitLabPrometheusGrafanaOpenTelemetry

Industry Keywords

FintechPCI DSSGDPRPayment GatewaySensitive Data Handling

Tech Stack

Tools & technologies

AWSCloudDistributed SystemsGoGrafanaKafkaMicroservicesNoSQLPrometheusSQL

About the role

Key responsibilities & impact

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

Requirements

What you’ll need

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

Comp & perks

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