Principal .NET Developer - Belfast

Requirements

Must have:

- 10+ years in software engineering with deep experience across .NET and distributed systems - Proven leadership as an Engineering Manager, Architect, Principal Engineer, or Site Lead - Track record modernizing enterprise systems from Web Forms to modular monoliths or microservices - Strong cloud expertise across Azure, AWS, Kubernetes, CI/CD ecosystems - Deep understanding of messaging systems, API design, and event-driven architecture - Experience leading multi-team engineering groups - Strong mentoring and talent development capability - Confident communicator able to simplify complex architecture for senior leaders - Proven ability to establish scalable engineering standards and culture - Nice to have: experience scaling engineering across multiple regions, exposure to AI-driven development practices, experience within regulated or enterprise domains

Responsibilities:

- Define and lead modern architecture strategy, transitioning legacy platforms into modular, cloud native systems - Decompose monoliths into scalable APIs, microservices, and event-driven services across Azure and AWS - Align frontend and backend architectural patterns to ensure performance and consistency - Introduce AI-enabled engineering practices to improve quality and delivery velocity - Provide architectural oversight across multiple applications and teams - Lead long term cloud migration, containerization, and automation initiatives - Diagnose and resolve deep performance and scalability challenges - Champion craftsmanship including TDD, BDD, clean architecture, and scalable design principles - Manage and mentor multi-disciplinary engineering teams - Scale engineering capability across regions - Establish Architecture Review Boards and governance structures - Build standards that enable consistency without slowing delivery - Partner with Product, Infrastructure, and Executive leadership to define architectural roadmaps - Own end-to-end delivery of major platform initiatives - Develop proofs of concept in .NET, Java, or Python to validate architectural direction - Communicate complex technical decisions clearly to senior stakeholders

Company:

We are OCHO, partnering with an established technology business engaged in significant platform modernization. This is an exciting opportunity for someone comfortable operating at both strategic and hands-on levels. You will play a vital role in shaping architectural direction and leading engineering teams through complex transformations. Our firm offers a competitive base salary and leadership bonus, with a focus on professional growth and a clear pathway for advancement to Head of Engineering or Enterprise Architecture. This position is based in Belfast with a hybrid work model.