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At CGI, we're helping organisations transform the way they develop, deploy and manage critical applications through secure, scalable and innovative technology solutions. As a Senior Platform Engineer, you'll play a key role in strengthening the reliability, performance and security of the platforms that underpin essential digital services. You'll take ownership of complex infrastructure challenges, introduce intelligent automation and shape modern DevSecOps practices that accelerate delivery and improve operational resilience. Working alongside talented engineering, development and security professionals, you'll have the freedom to innovate, influence technical decisions and continuously improve our platforms, while benefiting from a collaborative environment that supports your professional development and long-term career growth.
CGI was recognised in the Sunday Times Best Places to Work List 2025 and has been named a UK ‘Best Employer’ by the Financial Times. We offer a competitive salary, excellent pension, private healthcare, plus a share scheme (3.5% + 3.5% matching) which makes you a CGI Partner not just an employee. We are committed to inclusivity, building a genuinely diverse community of tech talent and inspiring everyone to pursue careers in our sector, including our Armed Forces, and are proud to hold a Gold Award in recognition of our support of the Armed Forces Corporate Covenant. Join us and you’ll be part of an open, friendly community of experts. We’ll train and support you in taking your career wherever you want it to go.
Due to the secure nature of the programme, you will need to hold UK Security Clearance or be eligible to go through this clearance. This is a hybrid position but the role includes participation in an out-of-hours on-call support rota to help maintain platform availability and service continuity.
Candidate profile
You will also play a key role in advancing CGI's engineering practices, collaborating with developers, infrastructure specialists and security teams to embed automated testing, monitoring and security throughout the software delivery lifecycle. You'll be encouraged to challenge existing approaches, introduce innovative solutions and share your expertise within a supportive engineering community, helping improve platform performance while developing your technical capabilities.
Key responsibilities:
• Engineer & Maintain: Design, configure and manage secure, highly available platform infrastructure, ensuring scalability, resilience and reliable application delivery.
• Automate & Optimise: Develop automated infrastructure provisioning, configuration management and deployment processes using Infrastructure as Code and Configuration as Code.
• Monitor & Improve: Implement proactive monitoring, alerting and performance optimisation to maintain platform health, capacity and operational reliability.
• Secure & Protect: Embed DevSecOps principles throughout CI/CD pipelines, integrating automated security testing, vulnerability scanning and compliance validation.
• Develop & Enhance: Optimise CI/CD pipelines, streamline release processes and support shift-left testing to improve software quality and delivery efficiency.
• Troubleshoot & Resolve: Investigate complex infrastructure and platform incidents, implement effective resolutions and develop automated remediation to prevent recurring issues.
• Collaborate & Innovate: Work closely with development, security and infrastructure teams to improve platform architecture, operational processes and engineering standards.
• Drive Continuous Improvement: Evaluate emerging cloud technologies, automation tools and DevSecOps practices, introducing improvements that enhance performance, security and efficiency.
• Support & Maintain: Participate in out-of-hours on-call support, ensuring timely incident response and the continued availability of critical services.
Required qualifications to be successful in this role
To succeed in this role, you should have strong experience in Platform Engineering, DevOps or DevSecOps, with the technical expertise to manage complex infrastructure environments and automate secure software delivery processes. You'll be confident working with cloud platforms, container technologies, CI/CD pipelines and infrastructure automation, alongside a solid understanding of security, monitoring and incident management. A proactive approach to problem-solving, strong collaboration skills and a commitment to continuous improvement will help you succeed, supported by CGI's collaborative engineering culture and opportunities for professional growth.
Essential skills and experience:
• Platform Engineering: Proven experience designing, maintaining and improving secure, scalable and highly available infrastructure within Platform Engineering, DevOps or DevSecOps environments.
• Cloud & Containers: Strong understanding of cloud platforms such as AWS and container technologies including Docker and Docker Swarm.
• Infrastructure as Code: Experience automating infrastructure provisioning and management using Terraform, ARM Templates or equivalent technologies.
• CI/CD Engineering: Experience developing, maintaining and optimising CI/CD pipelines using Azure DevOps, Jenkins or similar tools, alongside Git version control.
• Automation & Scripting: Proficiency in scripting languages such as Python or Bash, with knowledge of configuration management tools such as Ansible.
• Monitoring & Observability: Experience using monitoring and performance management tools such as Prometheus, Grafana or Dynatrace.
• Security & Compliance: Understanding of cloud and container security, identity and access management, vulnerability scanning and automated security controls.
• DevSecOps Practices: Knowledge of integrating security testing and compliance checks into software delivery pipelines, including static and dynamic application security testing.
• Security Frameworks: Familiarity with recognised security standards and frameworks, including OWASP and CIS Benchmarks.
• Incident Management: Proven troubleshooting and problem-solving capabilities, with experience resolving infrastructure incidents and improving operational resilience.
• Collaboration & Communication: Ability to work effectively across development, security and infrastructure teams, communicating technical information clearly and contributing to shared engineering objectives.
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Working environment
Life at CGI is rooted in ownership, teamwork, respect and belonging. Here, you’ll reach your full potential because…
You are invited to be an owner from day 1 as we work together to bring our Dream to life. That’s why we call ourselves CGI Partners rather than employees. We benefit from our collective success and actively shape our company’s strategy and direction.
Your work creates value. You’ll develop innovative solutions and build relationships with teammates and clients while accessing global capabilities to scale your ideas, embrace new opportunities, and benefit from expansive industry and technology expertise.
You’ll shape your career by joining a company built to grow and last. You’ll be supported by leaders who care about your health and well-being and provide you with opportunities to deepen your skills and broaden your horizons.
That same commitment to fairness extends to how we use technology. To support our recruitment team, AI tools may be used to help assess applications though they never replace human judgement. All hiring decisions remain entirely in the hands of our recruitment professionals.
Come join our team—one of the largest IT and business consulting services firms in the world.
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Senior Platform Engineer
CGI

