Senior Go Engineer (Core Banking)

Colibrix One

2d

About The Position

At COLIBRIX ONE, we're building advanced, AI-powered payment technologies that support Payment Service Providers (PSPs), Electronic Money Institutions (EMIs), and neobanks across the EU and the UK. As a fully licensed Electronic Money Institution (FCA Reference No. 927920) and holder of a Financial Institution Licence issued by the MFSA, as well as a principal member of both VISA and Mastercard, we provide comprehensive, real-world financial solutions that include: Global card processing, Digital wallet infrastructure, Cross-border merchant accounts, Alternative payment methods (APMs), and Corporate accounts for legal entities. We're a fast-growing team with a passion for innovation, security, and scalability. Our culture values curiosity, collaboration, and impact - and we're looking for talented professionals who are ready to shape the future of fintech. At COLIBRIX ONE, your work directly powers the digital economy. If you're eager to solve meaningful challenges and build with purpose, we'd love to hear from you. 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.

Requirements

• 5+ years of professional Go development experience, including 3+ years in fintech, banking, payments, or other transaction-critical systems
• Strong knowledge of distributed systems, microservices, and API design (REST and gRPC)
• Advanced PostgreSQL skills, including transactions, isolation levels, locking, indexing, migrations, and concurrency
• Experience designing reliable transactional systems using idempotency, retries, event deduplication, transactional outbox, sagas, and reconciliation
• Hands-on experience with event-driven architectures and message brokers such as NATS, Kafka, or RabbitMQ
• Practical knowledge of AWS, Kubernetes, and CI/CD
• Understanding of security requirements for financial and personal data
• Strong communication skills
• Working proficiency in Russian and English

Nice To Haves

• Experience with Temporal or a similar workflow engine
• Experience with NATS/JetStream, GitLab CI/CD, OpenTelemetry, Prometheus, Grafana, Loki, or Tempo
• Knowledge of event sourcing or append-only financial data models
• Familiarity with PCI DSS and GDPR
• Experience using AI coding tools for analysis, implementation, testing, or code review
• Hands-on experience in several of the following areas: Ledgers, accounting flows, accounts, and balance management; Holds, reversals, adjustments, reconciliation, and settlement; SEPA, SWIFT, and ISO 20022; Card transaction lifecycles and card scheme integrations

Responsibilities

• Contribute significantly to our payment gateway product.
• Influence and mentor team members through knowledge and experience.
• Translate business requirements into technical solutions and independently drive implementation.
• Integrate with banks, payment providers, processors, AML/KYC, or anti-fraud platforms.
• Build and operate production services, including incident investigation, safe deployments, database migrations, and observability.

Benefits

• Competitive salary and benefits package
• Flexible work arrangements to support work-life balance
• Continuous learning and development opportunities to enhance your skills and career growth

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed