Java Developer / Full Stack Software Engineer (DV Eligible)Location: London, UK (Hybrid – remote and client site as required)Employment Type: Full-time, PermanentSalary: £45,000 – £65,000 (depending on experience)About the OpportunitySanderson Government and Defence partnering with an exciting start-up workflow and AI orchestration consultancy delivering cutting-edge software into the public sector and national security domains. Their mission: modernise government through event-driven architectures, secure platforms, and automation at scale.They’re now hiring Java-focused Full Stack Software Engineers - from ambitious early-career developers to experienced senior engineers - to join their expanding delivery team. You’ll be one of the first Engineers in the team, shaping culture, approach and strategy.If you’re a driven and ambitious Java engineer who enjoys solving complex problems, working end-to-end across the stack, and influencing how a technology-driven consultancy evolves - this role is for you!Key ResponsibilitiesDevelop secure, scalable backend services using Java (Spring Boot)Build and maintain microservices and event-driven systemsContribute to full-stack applications using ReactWork with Docker, Kubernetes, AWS/AzureModel workflows with Camunda/BPMN (or learn on the job)Design and optimise data models in PostgreSQL and MongoDBSupport CI/CD, automation, and DevOps practicesCollaborate with clients and internal teams; share technical expertiseEssential ExperienceStrong Java/Spring Boot engineering backgroundExperience with microservices and modern API designExposure to Docker, Kubernetes, and cloud environments (AWS)SQL/NoSQL experience (PostgreSQL, MongoDB)Strong communication and problem-solving skillsAdaptable, proactive, and comfortable in a scaling organisationSecurity Clearance RequirementsDue to the sensitive nature of projects, candidates must be eligible for SC and DV (Developed Vetting) security clearance.Applicants must:Be sole British citizens (dual nationality not accepted)Have not spent more than 30 consecutive days outside the UK in the past 10 yearsHave no criminal recordHave no significant financial concerns (e.g., bankruptcy, unresolved debts)Candidates who do not meet these criteria unfortunately cannot be considered.Why You’ll Love Working HereEquity options: Real ownership as part of the company’s growthFlexible working: Adapt your schedule around life and client needsOutcome-driven culture: Focus on delivering value, not clock-watchingWork directly with founders: High trust, high challenge, high supportShape the future: Influence engineering standards, culture, and service offeringsEnd-to-end ownership: Autonomy to design, build, and ship meaningful workImpact that matters: Build solutions used by millions across the UK public sectorLow-ego environment: Collaborative, sociable, and free from big-firm bureaucracyProfessional growth: Sponsored Camunda certification and continuous learning opportunities