Software Architect, Software Engineer, Cloud Engineer - Software

Job Title:

Software Architect

Belfast, Northern Ireland

Hybrid In‑Office

As a Software Architect you will define and own the technical vision and architectural roadmap for our engineering organisation as we transform how we build software through AI and agentic engineering. You will lead architectural decision‑making, establish the patterns and standards our teams build on, and ensure our fintech platform is scalable, secure and built to last—while championing AI code generation, spec‑driven development, and agentic workflows to enable exceptional team velocity without compromising quality.

You will work on shaping the technical direction of a fast‑growing fintech, whilst partnering closely with Product Management, engineering leadership and our SDET teams to align technical solutions with business needs and to embed quality and testability as first‑class architectural concerns. You’ll stay close to the code—producing reference implementations, proofs of concept and clear architecture documentation that bring your designs to life.

Recently ranked #482 on the Inc. 5000 fastest growing companies in the United States, Biller Genie is an award‑winning B2B SaaS platform that is entering the Belfast market with ambitious plans to scale our team rapidly, with over 100 hires planned through 2028.

• Define and own the technical vision and architectural roadmap, leading decision‑making, documenting key designs, and approving major solutions
• Provide technical mentorship to development and SDET teams
• Review and approve major technical designs and solutions

• Design scalable, maintainable, and extensible fintech architectures while defining integration patterns and API standards
• Establish best practices and maintain clear architecture documentation, including diagrams and specifications

• Partner with SDET teams to define testing strategies, frameworks, automation, and quality metrics
• Architect for testability, ensuring clear coverage requirements and high‑quality outcomes

• Drive modern practices, tooling, and AI‑assisted engineering
• Ensure architectures meet performance, security, and scalability needs while managing technical debt and tracking industry trends

• Define and lead the roadmap for AI‑assisted and agentic engineering
• Enable safe, scalable adoption of AI code generation and spec‑driven development, evaluating tools and mentoring teams on effective use

• Align technical solutions with business goals alongside Product Management
• Lead architecture discussions, communicate with diverse stakeholders, and partner on strategic initiatives

• Champion TDD/BDD and continuous integration/testing practices
• Define performance, security, and load testing strategies, with clear quality gates and release criteria

• BSc/MSc in Computer Science (or equivalent commercial experience) with 9+ years in software engineering, including as a Software Architect or senior technical design lead
• Deep expertise in .NET/C# and modern web technologies, with strong knowledge of architectural/design patterns, DDD, and API/integration design
• Proven experience designing scalable, distributed, cloud‑native systems (Azure preferred; AWS/GCP considered) meeting performance, security, scalability, and resilience requirements
• Hands‑on experience with AI code generation and agentic workflows, including spec‑driven development for high‑velocity, high‑quality delivery
• Strong focus on testability, collaborating with QA/SDET on strategy, and producing clear architecture documentation and design records
• Comfortable staying hands‑on through proofs of concept, reference implementations, and design spikes
• Strong leadership, mentoring, and communication skills, able to engage technical and non‑technical stakeholders and grow engineering teams
• Legal right to work in the UK

• Cloud certification (e.g., Azure Solutions Architect Expert)
• Fintech/financial services experience (ideally payments or AR automation)
• Experience with event‑driven architecture and…