Principal AWS Platform Engineer

Role: Principal AWS Platform Engineer

Clearance Required: SC Active/Eligible

At IdentityE2E (a CACI company), we’re redefining what's possible in AWS platform engineering. As the first UK company to achieve AWS Vetted Partner Program (VPP) status for National Security and Defence, we design cutting-edge solutions for complex, highly regulated environments at large scale. Our Jezero Secure Landing Zone Accelerator and Cydonia biometric cloud solutions set industry benchmarks for scalability, security, and innovation.

We’re looking for an experienced AWS Platform Engineer who’s ready to lead architecture decisions, experiment boldly, and push boundaries in delivering secure, scalable, and dynamic cloud platforms. You’ll collaborate with expert level engineers, have opportunities to work in collaboration with AWS, and to influence the next generation of cloud services while working on critical national infrastructure and large-scale projects.

Key Responsibilities

• Lead the architecture and evolution of AWS platforms at scale, leveraging AWS Organizations, Landing Zones, and multi-account best practices.
• Develop and maintain Infrastructure as Code solutions using Terraform, CloudFormation, and AWS CDK.
• Champion security, compliance, and observability by integrating services like AWS Security Hub, GuardDuty, and Inspector.
• Design CI/CD pipelines to enable seamless deployments and self-service models for customers.
• Innovate with AWS Networking, KMS, IAM, and container orchestration (Kubernetes, ECS).
• Mentor and lead junior engineers

For this role you must have or at least be eligible for UK security clearance. To be eligible you must have been living in the UK for a minimum of the last 5 years and hold a British Passport.

Skills, Knowledge and Expertise

• Extensive hands-on experience designing and managing AWS cloud infrastructure.
• Deep expertise in multi-tenanted platform architectures and multi-account AWS setups.
• Proficiency in Python, Go, or similar languages for automation and scripting.
• Expert-level knowledge of AWS Networking, TLS, and security best practices.
• Experience with container orchestration (Kubernetes, EKS) and observability tools (Grafana, ELK).
• A passion for innovation, problem-solving, and delivering high-impact solutions.
• Experience leading/managing junior engineers
• Significant experience with Control Tower and deploying landing zones.

Why Apply?

• Competitive base salary
• 25 days holiday + bank holidays
• Up to 5% employer pension contribution
• Educational allowance, training programmes, certifications, conference attendance, and other activities to help employees stay current with new technologies and industry trends.
• Flexible Working Arrangements

Equal Opportunities:

CACI is proud to be an equal opportunities employer. Embracing the diversity of our people, we are on a journey to build a truly inclusive work environment where no one is treated less favourably due to ethnic origin, age, sex, gender identity, veteran status, religion or belief, sexual orientation, marital status, and disability or health condition, actively working to prevent discrimination.

As a Disability Confident employer, we will;

• Provide reasonable adjustments in the recruitment process where requested (contact a member of the recruitment team on 020 7602 6000 to discuss individual requirements further).
• Offer people with health conditions and disabilities, meeting the minimum criteria for a role, an interview.
• Our people are unique and we encourage, and support them, to be confident in contributing to our inclusion journey.

Equal Opportunities:

CACI is proud to be an equal opportunities employer. Embracing the diversity of our people, we are on a journey to build a truly inclusive work environment where no one is treated less favorably due to ethnic origin, age, sex, gender identity, veteran status, religion or belief, sexual orientation, marital status, and disability or health condition, actively working to prevent discrimination.

As a Disability Confident employer, we will;

• Provide reasonable adjustments in the recruitment process where requested (contact a member of the recruitment team on 020 7602 6000 to discuss individual requirements further).
• Offer people with health conditions and disabilities, meeting the minimum criteria for a role, an interview.
• Our people are unique and we encourage, and support them, to be confident in contributing to our inclusion journey.