Application Security Design Engineer

Security Application Design Engineer

Onsite in Bracknell
Eligible for DV clearance
50-55K per annum + benefits package

Join a high-impact engineering team delivering a secure Gateway solution for a major UK defence customer
. This is a hands‑on Security Application Architect role where you'll design, implement and troubleshoot mission‑critical infrastructure in a live, security‑sensitive environment. Working alongside senior architects and engineering leads, you'll play a key role in maintaining availability, supporting operational teams, and driving technical change across complex systems.

• Identify and implement infrastructure and application changes to support Gateway functionality and availability
• Produce detailed technical designs for change alongside the customer and Programme Manager
• Work daily with the Solution Owner and Engineering Lead to deliver engineering outcomes
• Provide technical support to SOC and 3rd Line teams, troubleshooting complex incidents
• Configure and support Gateway appliances and associated software
• Maintain high availability, resilience and security posture

You’ll bring strong hands‑on experience across:

Infrastructure

• VMware / vSphere
• RHEL & Windows Server
• Trellix
• SIEM platforms

Linux & Scripting

• Shell scripting
• REGEX
• Firewall configuration

Microsoft Stack

• Active Directory
• DNS
• RDS

Applications & Protocols

• LDAP
• Email, Chat & File standards
• Web & Chat protocols
• XML & JSON schema
• LDIF
• TLS server/client certificates
• File type digital formats

Gateways

• Deployment, configuration and support of Gateway appliances and their software

• A self‑starter comfortable working independently and collaboratively
• Strong troubleshooting mindset
• Clear written and verbal communication skills
• Comfortable interacting with stakeholders at all levels
• Willingness and ability to travel weekly within the South / Southwest at short notice

If you are interested in discussing this Application Security Design Engineer role further, please reply back with a copy of your updated CV.