COLIBRIX ONE
COLIBRIX ONE
51 – 200 Employees
APIBankingFintech
COLIBRIX ONE develops payment infrastructure for businesses and agencies through an all-in-one platform and electronic money institution. Its services include card acquiring, virtual card issuance, business accounts with IBAN and SEPA capabilities, mass payouts, open banking, and developer-facing payment APIs. As a principal member of Visa and Mastercard and an FCA- and MFSA-authorised provider, COLIBRIX ONE combines payment processing with compliance-focused infrastructure for organisations seeking scalable financial operations.

Senior Go Engineer

Build Go microservices for COLIBRIX ONE’s card-issuing platform, spanning payment operations from card lifecycle to clearing. Help deliver secure, highly available infrastructure for fintech clients across Europe.

Description

  • Build Go services for the Colibrix Partners card-issuing platform, including card lifecycle, wallets, balances, fees, commissions, authorization and clearing.
  • Turn business needs into technical specifications and propose designs for APIs, data models, modules and external integrations.
  • Develop solutions that meet PCI DSS, sensitive-data handling and secure service communication requirements.
  • Profile and improve service performance, concurrency, data storage and network interactions.
  • Contribute to microservices architecture, including service boundaries, communication, load balancing, error handling, queues, streaming and storage.
  • Write maintainable, testable code with unit and integration test coverage.
  • Review code, assess implementations, identify issues and offer constructive feedback.
  • Bring practical solutions to technical discussions within the existing architecture and development processes.

Requirements

  • Bring 3–5 years of Go backend development experience.
  • Have around three years of experience with fintech applications.
  • Understand distributed systems, microservices architecture and API design, including REST and RPC transports.
  • Have worked with SQL and NoSQL databases, message brokers such as Kafka or NATS, and caching systems.
  • Know CI/CD practices and tools, preferably GitLab.
  • Have experience with AWS.
  • Contribute technical expertise and collaborate with teammates on solutions.
  • Communicate clearly and explain complex technical ideas to colleagues with different levels of technical background.
  • Be fluent in written and spoken English and Russian.
  • Bring experience in fintech.
  • Design solutions with security built in throughout the development process.
  • Understand fintech regulatory requirements, including PCI DSS and GDPR.
  • Have experience optimizing performance and building highly available systems.
  • Have used observability tools for logging, metrics and tracing, such as Prometheus, Grafana and OpenTelemetry.

Benefits

  • Help shape fintech solutions at a growing company.
  • Join a collaborative, non-hierarchical team that values your expertise and ideas.
  • Access ongoing learning and development to build your skills and career.
  • Receive a competitive salary and benefits package.
  • Work flexibly to support work-life balance.

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