Senior Software Engineer - Identity and Security

Are you a Senior Software Engineer ready to pivot into Security and Identity?

Do you want to apply your software engineering expertise to real-world security challenges?

Would you like to build and own critical identity infrastructure used across a complex enterprise environment?

Are you ready to step into a role where software engineering comes first, and your development skills are the foundation?

If so, this is worth a conversation.

Senior Software Engineer →

💷 £225,000 – £250,000 Total Package

📍 London | Hybrid Working | Relocation & Sponsorship Available

Entasis Partners are working with a leading technology-driven organisation in London that is expanding its Security Engineering capability, with a strong focus on Identity and Access Management (IAM).

This role is designed for a Senior Software Engineer who wants to pivot into security engineering while remaining deeply technical. You will work within a high-performing engineering environment where identity, authentication, and access control systems are treated as mission-critical infrastructure.

You will play a key role in designing, building, and scaling secure identity platforms, working closely with engineering, infrastructure, and security teams to deliver resilient and automated solutions.

Why This Role Stands Out

• Security engineering first , not governance or policy
• Real engineering ownership of identity platforms
• Opportunity to pivot from software engineering into security
• High-impact work on critical infrastructure
• Strong technical culture with modern engineering practices
• Clear progression into Security Engineer / Security Architect pathways

This is a hands-on engineering role focused on building secure, scalable identity systems and integrating them into enterprise platforms.

Key Responsibilities

• Design and build secure identity and authentication services

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• Develop and maintain identity platform functionality using Java or similar languages
• Engineer integrations across enterprise systems and cloud environments
• Implement and automate identity lifecycle processes (Joiner–Mover–Leaver)
• Build secure APIs and identity-related services
• Troubleshoot and optimise identity platform performance
• Support production systems and respond to security-related incidents
• Contribute to security architecture and engineering decisions
• Drive automation and reliability across identity infrastructure
• Collaborate with platform, DevOps, and security teams

Core Experience

• Strong software engineering background
• Experience building scalable backend systems
• Solid understanding of system design and architecture
• Experience working with APIs and integrations

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• Strong debugging and problem-solving capability
• Comfortable working in production environments

Security / Identity Exposure (Helpful but Not Essential)

• Identity and Access Management (IAM)
• Authentication and authorisation systems
• Active Directory or LDAP
• Cloud platforms (AWS, Azure, or GCP)
• Secure system design principles
• Access control or identity workflows

You will work with Java, REST APIs, cloud platforms, Linux, CI/CD, and identity protocols (e.g. SailPoint).

So to Join a high-performance engineering environment building and securing enterprise identity and authentication systems please reach out to james@entasispartners.co.uk