Senior Developer

In this Senior Developer role within Shared Applications Service (SAS), you will work in agile, cross-functional teams to deliver secure, scalable software in a modern cloud environment across 600+ Home Office applications. You’ll shape technical choices, write clean, secure code, and promote test-driven development and reusability. You will mentor engineers, support recruitment, and help balance new and live services. This is a mission-driven opportunity to impact public services and national security through robust tech delivery.

• Civil Service Pension with employer contribution
• 25 days annual leave plus 8 public holidays and a privilege day
• Hybrid/office-based working options with 60% in office
• Non-contractual capability-based allowance potential
• Competitive salary within civil service pay framework

• Deliver secure, reliable, and scalable software while supporting the team on technical tasks
• Evaluate design options and balance technical and business factors for quality solutions
• Define and document test cases and maintain live systems for ongoing performance
• Evolve approaches in collaboration with other professions and focus on development/deployment
• Prioritise and direct technical tasks across the team to balance new and live services
• Potential out-of-hours work with additional allowance

• Designing scalable, maintainable, secure software with modern JavaScript architectures (SWDN Level 4)
• Developing high-quality, testable JavaScript/TypeScript code following engineering standards (PROG Level 3)
• Defining automated testing approaches (unit/integration/end-to-end) for JS apps (TEST Level 3)
• Integrating front-end and back-end services ensuring reliable deployment in distributed systems (SINT Level 4)
• Managing and utilising application data effectively (DATM Level 4)
• Supporting live JS-based services, diagnosing issues, improving performance, maintaining stability (ASUP Level 4)

• Mentoring and leadership
• Cross-functional collaboration
• Problem-solving with a security and reliability focus
• Node.js
• Python
• APIs REST/GraphQL