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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Application Engineer (Mission Critical) - **Company:** Leonardo - **Location:** Stoke Gifford, UK (Remote available) - **Experience:** Expert - **Salary:** £44,171.0 - £61,950.0 - **Contract:** Permanent contract - **Skills:** Active Directory, Amazon Web Services, Applications Architecture, Application Lifecycle Management, JIRA, Microsoft Azure, Cyber Security, System Configuration, Continuous Integration, DevOps, Monitoring of Systems, Identity and Access Management, OAuth, Cloud Platform System, Atlassian Tools - **Published:** September 10, 2026 - **Apply:** https://www.collegerecruiter.com/job/2847390850-senior-application-engineer-mission-critical ## About the Role * Solid experience in supporting, configuring, and enhancing enterprise or mission-critical applications, ideally within telecoms, control rooms, or public-safety communications environments. * Ability to solve moderately complex application-related issues and contribute to secure, scalable solutions in high-availability operational settings. * Understanding of application lifecycle management, integration patterns, and secure-by-design principles. * Strong communication and collaboration skills across engineering, service management and product teams. * A proactive mindset with a passion for continuous improvement and knowledge sharing., * Mission-Critical Application Experience: Hands-on experience supporting or configuring operational telecoms systems, public-safety applications, control room tools, or enterprise-grade software. * Application Lifecycle Knowledge: Understanding of deployment, maintenance, upgrades, and decommissioning phases. * Integration & Identity Management: Familiarity with integration patterns and identity systems such as Open ID connect and OAuth * Secure-by-Design Principles: Awareness of cyber security practices and secure configuration. * Service Management Alignment: Understanding of ITIL or similar frameworks. * Technical Problem Solving: Ability to resolve moderately complex issues and contribute to service improvement. * Collaboration & Communication: Strong communication skills across engineering, service, and product teams., * Experience with mission-critical communication platforms, public-safety dispatch systems, TETRA technologies, or telecoms signalling protocols. * Experience supporting applications across on-premise, hybrid, and cloud environments (e.g. AWS). * Exposure to MCX / MCPTT, control-room platforms, or emergency services communication systems. * Familiarity with Jira Service Management or other ITSM tooling. * Knowledge of enterprise IT services such as Active Directory, KMSPKI, and monitoring tools. * Exposure to DevOps or CI/CD practices. * Industry certifications (e.g. Atlassian, , ITIL, AWS, Azure). * Awareness of 3GPP technical standards. * Experience working in secure or defence-related environments. ## Description * Support, configure, and enhance the Leonardo MCX suite of applications, ensuring reliable operation within mission-critical communication environments.. * Deliver engineering tasks within defined work packages, ensuring alignment with user needs, operational communication requirements, security requirements, and service-level objectives. * Contribute to application architecture, configuration, integration, and lifecycle activities under the guidance of senior engineers. * Collaborate with stakeholders across engineering, service management, and product teams to resolve technical issues. * Mentor junior engineers and specialists, supporting their development and promoting best practices. * Participate in continuous improvement initiatives, including automation, documentation, and knowledge sharing. * Ensure compliance with engineering governance, ITSM processes, and cyber security policies., This role can be based at our Bristol site, with hybrid/custom working options where appropriate. 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