Staff Software Engineer

Staff Software Engineer – Full Stack, Backend & Integrations📍 Warminster, Wiltshire – Hybrid, three days per week onsite💷 Up to £120,000🔐 UK nationality and eligibility for UK Security Clearance requiredI’m partnering with an international defence technology company that builds mission-critical training and organisational-readiness software used by military, public-safety and resilience organisations across more than 70 countries.They are looking for a hands-on Staff Software Engineer to take technical ownership of a major, multi-year UK defence transformation programme.This is not a role where every requirement has already been defined. You will help shape the problems, make the key architectural decisions and lead substantial pieces of work from early discovery through to production.The role is ideal for a backend-leaning full-stack engineer who enjoys solving complex integration and data challenges while remaining close to the code.What You’ll Be Doing• Acting as the technical lead for a highly capable engineering team• Shaping the architecture across backend services, APIs, data and integrations• Connecting a complex software platform with ERP systems, data lakehouse technology, optimisation engines and partner platforms• Building reliable REST and event-driven integrations• Introducing streaming and change-data-capture patterns where appropriate• Developing full-stack product features across Java, SQL and Angular• Leading technical discovery and design sessions• Turning loosely defined customer needs into scalable technical solutions• Raising standards across automated testing, CI/CD, observability and production reliability• Mentoring Senior Engineers and helping them progress towards Staff-level scope• Communicating technical decisions clearly to engineers, project teams and senior customer stakeholders• Remaining hands-on while influencing the wider technical direction of the programmeWhat We’re Looking For• Significant commercial software engineering experience, including several years at Senior Engineer level or above• A track record of leading complex technical work across a team or multiple workstreams• Strong backend engineering experience, ideally with Java and SQL• Experience building APIs, services and complex third-party integrations• Familiarity with Angular or another modern JavaScript framework• Experience integrating with ERP platforms, data stores, external engines or data warehouse/lakehouse environments• Sound understanding of event-driven systems, streaming, batch processing and data-integration patterns• Strong knowledge of automated testing, CI/CD, observability and production engineering• The ability to lead through influence rather than formal management authority• Confidence operating in ambiguous environments where requirements continue to evolve• Strong stakeholder communication and customer-facing skills• Evidence of mentoring and developing experienced engineersCandidates from strong neighbouring backend languages such as C#, TypeScript, Python or Go are also encouraged to apply, provided they are comfortable moving into a Java environment.Security RequirementsDue to the nature of the programme, applicants must be UK nationals and eligible to obtain UK Security Clearance.Current SC clearance would be advantageous but is not essential.The Package• Salary up to £120,000• Hybrid working, typically three days per week in Warminster• 5% employer pension contribution• Private healthcare, including dental• Enhanced maternity, paternity and adoption leave• 25 days’ annual leave plus bank holidays• Life assurance• Cycle-to-work scheme• Regular company social eventsThis is a rare opportunity to take genuine Staff-level ownership of complex, production-critical systems without moving away from hands-on engineering.You will be solving meaningful technical problems, influencing architecture and building software used in real-world defence, public-safety and resilience environments.Interested?Apply directly or message me with your CV for a confidential conversation.