About this role
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
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What we're looking for
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Strong commercial experience with Go/Golang
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Proven experience designing and building complex backend systems
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Solid understanding of distributed systems and microservices architecture
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Hands-on experience with event-driven platforms such as Kafka
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Strong knowledge of API design and system integrations
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Experience working on large-scale migration or integration programmes
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Experience with cloud-native environments and modern engineering practices
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Ability to work with high-volume, high-availability backend services
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Experience troubleshooting complex technical issues across integrated systems
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Strong collaboration skills and confidence working with both client and vendor teams
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Relevant domain experience
Experience in any of the following areas would be highly valuable:
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Card payments
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Issuer processing
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Banking
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Fintech
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Transaction switching
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Payment infrastructure
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Other transaction-heavy or real-time processing environments
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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.