Senior Go Engineer (Core Banking)

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)

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.
What You Need to Succeed

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

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

Banking Domain Experience
Hands-on experience in several of the following areas is highly valued:

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

Nice to Have

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

What We Offer:

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

* This position is offered within the COLIBRIX ONE. Employment will be under the appropriate legal entity based on the role and location.
Originally posted on Himalayas