Platform engineer in London

IG is a FTSE 100 fintech operating across five continents, serving over 1.3m customers and handling billions of dollars in transactions - built on scale, trust, and proof. This role is part of our Platform Engineering team who are responsible for building the cloud and containers platform landscape to support the business applications via self-service capabilities and automation. The Senior Platform Engineer is a hands-on technical contributor responsible for building, evolving, and maintaining cloud platform infrastructure to ensure it is secure, scalable, reliable, and cost-effective.

Responsibilities:

• Design and architect scalable AWS cloud infrastructure, developing IaC solutions using Terraform and leading cloud technology evaluation and standardisation initiatives.
• Build, optimise, and maintain CI/CD pipelines for infrastructure deployment, establishing DevOps and DevSecOps best practices across the organisation.
• Architect and manage Kubernetes environments (EKS, AKS, GKE) and implement platform engineering tools to deliver self-service capabilities via an IDP (e.g. Backstage).
• Define and enforce monitoring, alerting, and observability standards to ensure infrastructure reliability and performance.
• Foster collaboration between development and operations teams, bridging gaps to drive a unified engineering culture.
• Mentor junior engineers, share knowledge across the team, and write and maintain documentation to support continuous learning and engineering best practices.

Requirements:

• 4+ years in cloud infrastructure engineering with hands-on experience designing and administering complex platforms across AWS, GCP, and Azure, including deep knowledge of networking (VPC, Direct Connect, Transit Gateways, BGP, OSPF) and IaaS/PaaS architectural patterns.
• 2+ years with IaC tools (Terraform or Ansible) and hands-on experience with orchestration and automation platforms (AWX, Ansible Tower, Terragrunt), scripting in Python, Bash, or Go.
• 2+ years designing and implementing CI/CD pipelines using Jenkins, GitLab, GitHub Actions, or equivalent, with strong knowledge of security best practices including secrets management, vulnerability scanning, and compliance.
• 2+ years of Kubernetes administration across on-premises and cloud environments (EKS preferred, AKS, GKE), with proficiency in networking, RBAC, pod security, service mesh (Istio), and Docker image management.
• Experience implementing developer portals (Backstage), artifact repositories (JFrog Artifactory, Nexus), API gateways, and self-service platform engineering tools to support internal teams.
• Hands-on experience with monitoring and observability platforms (Honeycomb, Prometheus, Grafana), including defining alerting standards and ensuring infrastructure reliability at scale.
• Strong grasp of microservices architecture, cloud networking protocols (Layer 2/3, MPLS), DNS, load balancing, and traffic management, with the ability to contribute to and implement technical direction.
• Proficiency across version control systems (Git, GitHub, GitLab, Bitbucket) with the ability to operate autonomously and contribute to engineering standards across teams.

Conditions:

• We work hybrid, which means three days in the office.
• Competitive salary.
• Flexible Benefits Package on top of your salary (12%).
• Private medical cover for you and your family.
• Life insurance.
• Contribution to gym memberships.
• 25 Days holiday, with 1 additional day off to celebrate your Birthday & 2 additional days off a year for voluntary work (28 in total).
• The option to buy or sell holiday days.
• A comprehensive global and local onboarding process.
• Enhanced primary (maternity), secondary (paternity), and shared parental pay and leave, as well as a range of support and benefits for parents.