Senior Go Engineer — Fintech Payments, Flexible Work

Colibrix One

Kraków

On-site

PLN 240,000 - 320,000

Full time

14 days+
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Benefits offered by this job

Competitive salary
Flexible work arrangements
Learning opportunities

Job summary

COLIBRIX ONE is 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 mentor teammates through knowledge and experience rather than formal authority.

You will work on distributed, transaction-critical fintech systems with a strong focus on reliability, security, and scalable microservices, shaping the future of digital payments.

Qualifications

  • 5+ years of professional Go development experience, including fintech/payments or transaction-critical systems.
  • Strong knowledge of distributed systems, microservices, and API design (REST and gRPC).
  • Advanced PostgreSQL skills, including transactions, isolation levels, 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 like NATS, Kafka, or RabbitMQ.
  • Experience building and operating production services, including incident investigation, safe deployments, database migrations, and observability.
  • Practical knowledge of AWS, Kubernetes, and CI/CD.
  • Experience integrating with banks, payment providers, AML/KYC, or anti-fraud platforms.
  • Understanding of security requirements for financial data and translating business requirements into technical solutions.

Skills

Go development
Fintech/payments experience
Distributed systems
API design REST/gRPC
PostgreSQL advanced
Event-driven architecture
AWS, Kubernetes, CI/CD
Security of financial data
Russian & English proficiency

Tools

NATS
Kafka
RabbitMQ
PostgreSQL tooling

Job description

COLIBRIX ONE is 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 mentor teammates through knowledge and experience rather than formal authority.

You will work on distributed, transaction-critical fintech systems with a strong focus on reliability, security, and scalable microservices, shaping the future of digital payments.

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