Senior Golang Developer

We are looking for a Senior Golang Developer for our customer — a FinTech company developing a Connector-as-a-Service platform that enables banks to integrate with payment systems like SEPA Instant. You’ll lead the integration of the Latvijas Banka SEPA Instant (EKS) system using Golang, Kafka, and RabbitMQ over TLS in a scalable, event-driven architecture.

Requirements

We’re looking for a Senior Golang Developer who has:

• 5+ years of backend development experience, with at least 3 years focused on Golang.
• Strong expertise in building event-driven, distributed systems.
• Solid hands-on experience with Kafka and RabbitMQ (AMQP over TLS).
• Familiarity with ISO 20022 XML message structures and working with XSD schemas.
• Proven experience in developing multi-tenant applications and managing tenant-specific configurations.
• A strong understanding of message delivery semantics (especially at-least-once delivery).
• Experience with Docker and container orchestration, ideally Docker Swarm.
• Knowledge of implementing resilient systems with retry logic, backoff strategies, and dead-letter queues.
• Proficiency in TLS-based secure communication and secrets management tools like HashiCorp Vault.
• A testing mindset: experience writing unit, integration, and load tests, and integrating them into CI pipelines
  
  

Responsibilities

As a Senior Golang Developer, you will:

Design and implement a dedicated Golang integration service for SEPA Instant (EKS) as part of the platform’s Integration Services Layer.

Build message flows that consume messages from Kafka and deliver them to RabbitMQ (AMQP over TLS) with at-least-once delivery guarantees.

Translate internal messages into ISO 20022 XML formats, validating against multiple XSD versions.

Ensure system high availability by deploying services as replicated Docker Swarm containers with self-healing and fault-tolerance mechanisms.

Implement robust retry and failure handling logic, ensuring message delivery or fallback to DLQ.

Optimize the service for high throughput (100+ messages/sec per instance) and low latency (

Secure all communication using TLS 1.2+, dynamically loading certificates from Vault without downtime.

Collaborate with DevOps and backend engineers to support rolling updates, fast startup (<5s), and reliable CI test pipelines.

Participate in discussions around additional features such as account reconciliation, manual message imports, and beneficiary management

What Will You Get With Kindgeek

We want you to thrive and feel supported

• Professional growth: at Kindgeek, we want our employees to grow and achieve ambitious professional goals. We support professional development with training and certification refunds and provide regular feedback and technical reviews.
• Benefits package: Kindgeek offers all team members competitive compensation and a benefits package that includes 18 working days of fully paid vacation, 10 compensated by 50% sick leaves without a note from the doctor, and an opportunity to take study leaves. Depending on how long you stay in the company, you can receive different health insurance packages from our partners.
• Personal growth: as a part of our team, you will have access to corporate English courses with a 50% reimbursement, take advantage of our offline library and access a large selection of corporate training and classes. Also, every employee can request any internal or external training or certification if it applies to his or her work responsibilities.
• Geek community: at Kindgeek, we value community – even in the full-scale invasion times, we take every opportunity to stick together. Our geeks organise various online and offline clubs – from stretching and skiing to English. We volunteer together and support each other.
• Flexibility: Kindgeek offers a hybrid working model. Team members can work remotely or from the office or Kindgeek London Hub – an innovative cafe-style co-working in Lviv (it's pet-friendly!).
  
  

We encourage you to apply

At Kindgeek, we encourage everyone to apply – regardless of nationality, race, gender, marital status, disability, sexual identity, or religion. We are growing into an inclusive, equal-opportunity company where only professionalism, competence, and ideas matter. We are committed to supporting mobilised employees and veterans joining Kindgeek and facilitating their career development. We aim to bring equal opportunities to all team members and candidates – especially those underrepresented in technological companies.