Full Stack Developer jobs in United Kingdom

Applications Support Engineer (Grade P3) – Digital Technology – Permanent, Full time 37 hrs. Location: Harlow or Glenrothes (Hybrid with minimum 2 days on site per week). Clearance: SC. Posted 2025-11-25. Country: United Kingdom.

This role is responsible for supporting and maintaining the full application life cycle and day‑to‑day operation along with servicing any new business requirements/configuration changes and new stand‑ups, utilizing industry standard best practice. It will also play a major part in understanding new business requirements, testing and integrating other applications to integrate data between application. Reporting to the Head of Business Intelligence, the successful candidate shall manage, operate, improve, maintain, and report the performance of the service. You will be operationally focused and will support optimal use of application technologies, driving to improve business efficiency, reduce risk and maximise customer engagement, both internally and externally.

• Act as the application’s Subject Matter Expert and technical expert with a particular focus on administering, configuring, and modifying dataflows within the tool.
• Perform software upgrades and data migration between different platforms; OS level administration experience would be a distinct advantage.
• Conduct regular software maintenance, performance tuning and patching, including periodic monthly out‑of‑hours work.
• Plan work with the Head of Service ensuring operational integrity and compliance covering information security, change management, asset management and software licensing.
• Meet IS assurance governance and policies to ensure we operate with confidence, through effective maintenance of secure and stable IT platforms for the business, adherence to company security, accreditation, and audit requirements.
• Lead troubleshooting of all related service issues, including management of vendors to ensure service operates as expected.
• Support the development and implementation of key service level agreements (SLAs).
• Manage incidents, problems and changes to the service efficiently and effectively following the agreed documented processes, including planning the release of updates into service in line with technology roadmaps and demand management.
• Maintain system documentation, support procedures and rota/cover arrangements with actively managed preventative upgrade cycles.
• Support effective operational supplier performance and repairs & maintenance contracts, including software licensing compliance, software licence & support contract agreements and renewals.
• Carry out a program of daily/weekly/monthly checks and develop approaches to improve, streamline and automate the health status of the environment.

RTX adheres to the principles of equal employment. All qualified applications will be given careful consideration without regard to ethnicity, color, religion, gender, sexual orientation or identity, national origin, age, disability, protected veteran status or any other characteristic protected by law.