Senior Go Engineer

COLIBRIX ONE

. Design and develop Go-based services for the Colibrix Partners card-issuing platform, covering card lifecycle, wallets and balances, fees and commissions, authorization and clearing flows .

Posted 10/10/2026full-timeRemote • Poland, Spain, Serbia, Cyprus, GeorgiaSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in Go Development for backend systems, with a strong focus on building secure, high-performance fintech applications. Proficient in microservices architecture, API design, and compliance with regulatory standards such as PCI DSS and GDPR.

Highest-signal resume keywords

Go DevelopmentFintech ApplicationsMicroservices ArchitectureAPI DesignPerformance Optimization

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Go DevelopmentBackend SystemsSQL DatabasesNoSQL DatabasesAPI DesignPerformance OptimizationSecurity DesignDistributed SystemsMicroservicesObservability Tools

Soft Skills

Strong Communication SkillsCollaboration

Tools & Technologies

AWS Cloud PlatformGitLabKafkaNATSPrometheusGrafanaOpenTelemetry

Industry Keywords

FintechPCI DSSGDPR

Tech Stack

Tools & technologies

AWSCloudDistributed SystemsGrafanaKafkaMicroservicesNoSQLPrometheusSQLGo

About the role

Key responsibilities & impact

Design and develop Go-based services for the Colibrix Partners card-issuing platform, covering card lifecycle, wallets and balances, fees and commissions, authorization and clearing flows
Translate business requirements into technical specifications and propose solutions for APIs, data models, modules, and external-provider integrations
Build solutions compliant with PCI DSS and sensitive-data handling and secure inter-service communication requirements
Analyze and optimize service performance through code profiling, concurrency handling, and efficient data storage and network interactions
Participate in microservices architecture covering service boundaries, communication patterns, load balancing, error handling, queues/streaming, and data storage
Produce maintainable, testable code with unit and integration test coverage
Participate in code reviews, evaluate implementations, identify issues, and provide constructive feedback
Contribute practical solutions to technical discussions within the current architecture and development processes

Requirements

What you’ll need

3–5 years of Go development experience focused on backend systems
Around 3 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 ability to explain complex technical ideas to colleagues with varying technical backgrounds
Fluency in written and spoken English and Russian
Experience in the fintech domain
Ability to design solutions with security considerations built in at every stage
Understanding of fintech regulatory requirements, including PCI DSS and GDPR
Experience in performance optimization and building high-availability systems
Experience with observability tools including logging, metrics, and tracing (Prometheus, Grafana, OpenTelemetry)

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