Senior Python Developer

At CGI, we deliver secure, innovative technology solutions that help our clients tackle complex challenges and achieve meaningful outcomes. As a Senior Python Developer, you’ll help build and support cloud-native applications that power critical services, working with modern technologies in a collaborative environment where your ideas, expertise, and contributions will make a real impact. You'll have the opportunity to influence engineering best practices, drive continuous improvement, and develop your career alongside experienced professionals. 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. Candidate Profile As a Senior Python Developer, you’ll design, build, and support secure cloud-native applications within AWS environments. Working closely with product, platform, and engineering teams, you’ll help deliver scalable solutions while embedding security, automation, and operational excellence throughout the development lifecycle. Develop secure Python applications and services Build and enhance AWS cloud solutions Create and maintain CI/CD pipelines using GitHub Actions and related tools Develop Infrastructure as Code using Terraform Implement secure development practices and automated security controls Monitor, troubleshoot, and optimise application performance Support incident investigation and service reliability Collaborate with teams to improve engineering and platform practices Participate in an on-call rota once established in the role Required Qualifications To Be Successful In This Role We're looking for someone with strong Python development experience and a passion for building secure, scalable cloud solutions. Commercial experience developing applications with Python Hands-on experience with AWS cloud services Experience with Terraform or other Infrastructure as Code tools CI/CD pipeline experience (GitHub Actions preferred) Strong understanding of secure software development practices Experience with observability, monitoring, or logging tools Ability to investigate and resolve production issues