Senior Backend Engineer: Java, Spring Boot, Kafka (Hybrid)

Ocho

Belfast City District

Hybrid

GBP 90,000 - 120,000

Full time

7 days ago

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Benefits offered by this job

Hybrid work model

Job summary

Ocho is recruiting for a senior backend engineer in Belfast with ownership of a core domain within a payments platform. You will shape the platform rewrite and work in a small, funded team delivering event-driven services in Java.

You will own design, reliability and performance, collaborating closely with product and data teams. A strong emphasis on data correctness, architectural decisions and mentoring colleagues is required.

Qualifications

9+ years of commercial Java experience, ideally Java 17 or later.
Strong Spring Boot and REST API design.
Experience with event-driven architectures and handling data correctness.
Ability to shape design decisions and own a core domain end-to-end.

Responsibilities

Design and build backend services in Java and Spring Boot.
Own a core domain of the platform from design through to production support.
Build event-driven pipelines using Kafka for transaction processing and reconciliation.
Migrate functionality out of the legacy monolith without disrupting live clients.
Own reliability, observability and performance across services.
Contribute to design reviews and help set engineering standards.
Mentor mid-level engineers through code review and pairing.
Work with product to shape what gets built, not just how.