Senior Software Engineer

Ocho Belfast, Northern Ireland, United Kingdom

We’re working with a leading technology team in Belfast who are embarking on a major cloud upgrade programme, moving their large‑scale systems into AWS. They’re seeking a Senior Software Engineer to help drive this transformation while building out high‑quality, scalable solutions that serve both internal teams and external clients.

This is a hands‑on senior role where you’ll design and deliver solutions, mentor engineers, and play a key part in shaping best practice across a modern, cloud‑focused environment. You’ll be contributing to distributed systems, high‑performing backend services, and next‑generation platforms designed for scale.

• Partner with architects and senior stakeholders to design and deliver scalable, resilient systems.
• Take ownership of technical delivery, from design through to deployment and support.
• Mentor and guide engineers, helping to upskill the wider team.
• Enhance tooling, CI/​CD pipelines, and development processes to improve delivery.
• Identify risks and blockers early, ensuring progress across the engineering lifecycle.

• Deep knowledge of .NET Core / modern .NET with C#.
• Proven experience building APIs (REST or Graph
  
  QL).
• Strong database background (SQL Server, MySQL, or similar) including optimisation.
• Practical experience with cloud services – AWS, Azure, or GCP all considered.
• Strong understanding of the full SDLC, from requirements through to production.
• Experience with automated testing frameworks at scale.
• Pragmatic, collaborative approach with the ability to influence technical decisions.

• Experience building desktop apps with WPF.
• Exposure to high‑throughput or real‑time systems.
• Knowledge of microservices and/or serverless design patterns.
• Experience applying TDD, BDD, or similar approaches.

Apply here or reach out to Aaron Somers at Ocho for more information via Linked In.