Role: Senior AppSec Engineer
Location: Remote UK
Rate: £750 per day (Outside)
The MRJ team have an urgent contract opportunity available for an experienced Senior Application Security Engineer to help shape and implement a modern Secure SDLC capability across the organisation during a major period of technology transformation.
This is a highly visible role operating across Engineering, Security, and Architecture, focused on embedding security into software delivery without slowing innovation down.
You’ll play a key role in helping the company define what “good” looks like from a modern application security perspective, particularly as the business accelerates delivery across AI, Agentic AI, and a large portfolio of new application projects.
The Role
This is not a traditional operational security role.
We need someone capable of stepping into a complex engineering environment, assessing the current state, and building a pragmatic roadmap toward a scalable, modern Secure SDLC programme.
You’ll work closely with both Security and Engineering leadership, embedding yourself within teams to improve security maturity, influence delivery practices, and help create a more security-aware engineering culture.
The role requires a balance of strategic thinking, stakeholder management, and hands-on technical credibility.
What You’ll Be Doing?
- Assess the current application security and SDLC landscape
- Define and implement a Secure SDLC strategy and roadmap
- Embed security into engineering and development workflows
- Help establish modern AppSec and DevSecOps best practices
- Partner closely with Engineering teams to improve secure development maturity
- Support security considerations across AI and emerging technology initiatives
- Help create scalable, developer-friendly security processes
- Influence stakeholders across Security, Engineering, and Leadership
- Drive security enablement rather than gatekeeping
What experience are we looking For?
- Strong background in Application Security, DevSecOps, or Security Engineering
- Experience building or maturing Secure SDLC programmes
- Strong understanding of modern engineering environments and CI/CD pipelines
- Experience embedding security into Agile / DevOps teams
- Ability to assess current state and define future-state security maturity
- Strong stakeholder management and communication skills
- Pragmatic, collaborative mindset with the ability to influence engineering teams
- Comfortable operating in fast-paced transformation environments
Desirable Experience
- Cloud-native environments (AWS, Azure, or GCP)
- SAST, DAST, SCA, container or IaC security tooling
- AI / GenAI / Agentic AI security considerations
- Experience within high-growth or transformation-led organisations
Next steps
We are shortlisting now with interviews taking place next week. Get in touch by sending over your profile and the team willbe in touch.
Sign in
To continue your applicationor continue with email
By continuing you agree to our Terms & Privacy Policy.
