Senior Go Engineer — FinTech Payments, Flexible Work

Colibrix Limited; Warszawa; Hybrid; PLN 200,000 - 320,000; Full time

Benefits offered by this job

Shape the future of fintech

Collaborative, horizontal team culture

Continuous learning and development

Competitive salary and benefits

Flexible work arrangements

Job summary

Colibrix Limited in Warsaw, Poland, is seeking an experienced Go Engineer to join our fintech payment gateway product. You will design and implement high-throughput services with a focus on reliability and security.

The ideal candidate has 5+ years in Go, strong background in distributed systems and databases, plus hands-on experience with AWS, Kubernetes, and event-driven architectures. Proficiency in English and Russian is required, with a collaborative, results-driven mindset.

Qualifications

• 5+ years of professional Go development, including fintech experience.
• Strong knowledge of distributed systems, microservices, and API design.
• 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.
• 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, processors, AML/KYC, or anti-fraud platforms.
• Understanding of security requirements for financial and personal data.
• Ability to translate business requirements into technical solutions and independently drive implementation.
• Strong communication skills and working proficiency in Russian and English.

Skills

Go

Distributed systems

API design

Event-driven

Russian

English

NATS

Kafka

RabbitMQ

AWS

Kubernetes

CI/CD

Tools

PostgreSQL

NATS

Kafka

RabbitMQ

AWS

Kubernetes

CI/CD

Job description

Colibrix Limited in Warsaw, Poland, is seeking an experienced Go Engineer to join our fintech payment gateway product. You will design and implement high-throughput services with a focus on reliability and security.

The ideal candidate has 5+ years in Go, strong background in distributed systems and databases, plus hands-on experience with AWS, Kubernetes, and event-driven architectures. Proficiency in English and Russian is required, with a collaborative, results-driven mindset.