Senior Go Engineer (6 month project)

We are looking for a Senior Backend Engineer to join a large-scale issuer processor migration programme within the payments domain.
The role is focused on building and integrating high-volume backend systems, supporting complex platform migrations, and ensuring the reliability of business-critical services throughout the programme lifecycle.
Location
Denmark is the preferred location for this role.
What you'll be working on

Design, develop, and maintain backend services using Go/Golang

Build integrations between complex client and vendor platforms

Work with transaction processing systems, APIs, and event-driven architectures

Contribute to distributed systems and microservices-based solutions

Support technical integration activities across multiple platforms

Perform technical analysis related to migration and integration initiatives

Participate in testing throughout different stages of the migration programme

Investigate and resolve technical issues arising during integration and migration

Work in cloud-native environments using modern engineering practices

Help ensure the stability, reliability, and continuity of high-availability, business-critical systems

Collaborate closely with client, vendor, and engineering teams throughout the programme lifecycle

Requirements
What we're looking for

Strong commercial experience with Go/Golang

Proven experience designing and building complex backend systems

Solid understanding of distributed systems and microservices architecture

Hands-on experience with event-driven platforms such as Kafka

Strong knowledge of API design and system integrations

Experience working on large-scale migration or integration programmes

Experience with cloud-native environments and modern engineering practices

Ability to work with high-volume, high-availability backend services

Experience troubleshooting complex technical issues across integrated systems

Strong collaboration skills and confidence working with both client and vendor teams

Relevant domain experience
Experience in any of the following areas would be highly valuable:

Card payments

Issuer processing

Banking

Fintech

Transaction switching

Payment infrastructure

Other transaction-heavy or real-time processing environments

The ideal candidate combines strong backend engineering expertise with practical experience working on complex integrations and migration programmes, particularly in environments where reliability, scalability, and continuity are critical.
Originally posted on Himalayas