Senior Site Reliability Engineer

Senior Site Reliability Engineer (Senior SRE) About the Role We are looking for an experienced and passionate Senior Site Reliability Engineer (Senior SRE) to join a growing fin-tech business in London. This is an exciting opportunity for a technically strong engineer with extensive experience in AWS Cloud infrastructure, Python development and site reliability engineering. You will play a key role in designing, building and maintaining highly available, scalable and resilient cloud platforms. You will work closely with software engineering, DevOps and architecture teams to improve system reliability, automate operational processes and drive engineering best practices across the organisation. Key Responsibilities - Design, implement and maintain scalable, highly available AWS cloud infrastructure. - Develop automation tools and services using Python. - Drive improvements in system reliability, availability, performance and scalability. - Build and maintain CI/CD pipelines and infrastructure automation. - Implement and improve monitoring, logging and alerting solutions. - Lead incident management, troubleshooting and root cause analysis. - Develop and maintain Infrastructure as Code (IaC). - Identify opportunities to reduce operational overhead through automation. - Establish and promote SRE best practices, including SLIs, SLOs and error budgets. - Collaborate with development teams to improve application performance and production readiness. - Mentor junior engineers and provide technical leadership. Essential Skills & Experience - Strong commercial experience in a Senior SRE, DevOps or Cloud Engineering role. - Extensive hands-on experience with AWS Cloud services, including EC2, EKS, ECS, Lambda, S3, IAM, VPC and CloudWatch. - Strong Python programming and scripting skills. - Experience with Infrastructure as Code tools such as Terraform or CloudFormation. - Strong knowledge of Docker and Kubernetes. - Experience designing and maintaining CI/CD pipelines. - Excellent understanding of Linux, networking and distributed systems. - Experience with observability tools such as Prometheus, Grafana, Datadog or Splunk. - Strong understanding of incident management, disaster recovery and high availability architectures. - Experience working in Agile engineering environments. Desirable Skills - AWS certifications (Solutions Architect, DevOps Engineer or equivalent). - Experience with serverless architectures. - Knowledge of security best practices and cloud governance. - Experience with microservices and event-driven architectures. - Experience working with large-scale, business-critical production environments.