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£80000 GBPHybrid WORKINGLocation: Stevenage, Central London, Greater London - United Kingdom Type: Permanent Software Architect - Stevenage(Hybrid role - typically 3-4 days on-site per week) Salary: Up to £80,000 DOE Security Clearance: British Citizenship The Opportunity:This is a fantastic opportunity for an experienced Software Architect, or a highly capable Senior Software Engineer ready to take the next step. You will be responsible for defining and leading the software architecture for complex, safety-critical systems at the forefront of defence technology. Working in a collaborative, multi-disciplinary environment, you will help shape robust, secure and scalable software solutions that underpin next-generation weapon system designs. Key Responsibilities:• Define, document and own the full software architecture for major projects, from concept through to implementation. • Establish the structural and temporal architecture, ensuring consistency and integrity across components. • Identify and manage design drivers such as real-time performance, safety, security, flexibility and reusability. • Produce derived and emergent requirements with clear rationale and traceability. • Collaborate closely with systems, hardware and software engineers to ensure technical alignment. • Contribute to long-term technology strategy, influencing tools, frameworks and architectural direction. What We're Looking For:• Strong technical background in software design and architecture. • Experience with model-based engineering and software design patterns. • Proficiency in one or more programming languages (e.g. C++, C#, Java,