Senior Software Engineer I in Southampton

Are you passionate about building reliable, secure cloud platforms that power critical data solutions?

Do you enjoy solving complex infrastructure challenges while improving performance, resilience, and cost efficiency?

About the Business:

At Cirium, our goal is to keep the world connected. We are the industry leader in aviation analytics; helping our customers understand the past, present, and predicting what will happen tomorrow. Our mission is to transform the aviation industry by enabling airlines, airports, travel companies, tech giants, aircraft manufacturers, financial institutions and many more accelerate their own digital transformation. You can learn more about Cirium at the link below. https://www.cirium.com

About the Role

This role focuses on designing, building, and operating secure, scalable cloud infrastructure to support data platforms across AWS, Databricks, and Snowflake. You will work closely with engineering and security teams to enable reliable, observable, and cost-efficient systems. The position plays a key role in improving platform performance, resilience, and operational excellence.

Responsibilities

• Design, build, and manage cloud infrastructure using Infrastructure as Code with consistent, auditable environments
• Operate and enhance observability using Grafana, including dashboards, alerts, and noise reduction
• Implement and validate backup and disaster recovery processes, ensuring readiness and alignment to RPO/RTO
• Troubleshoot incidents across infrastructure and data platforms, leading root cause analysis and mitigation
• Optimize performance and cost through usage analysis, rightsizing, and architectural improvements
• Collaborate with security teams to enforce encryption, access controls, and compliance standards
• Maintain clear operational documentation, runbooks, and knowledge sharing
• Support platform reliability and continuous improvement across AWS, Databricks, and Snowflake ecosystems

Requirements

• Strong AWS fundamentals including networking (VPC, subnets, routing), compute (EC2, EKS/ECS, Lambda), and storage (S3 architecture, lifecycle, replication)
• Expertise in identity and security including IAM (least privilege, cross-account), KMS, secrets management, encryption, and logging practices
• Experience supporting Databricks (clusters, networking, IAM, performance tuning) and Snowflake (connectivity, authentication, data movement)
• Knowledge of backup and disaster recovery tools such as Clumio, with experience in retention policies and restore validation
• Experience with observability tools including Grafana, alerting, and handling logs, metrics, and traces
• Proficiency in Infrastructure as Code using Terraform or CloudFormation, including CI/CD pipelines and environment promotion
• Reliability engineering experience including scaling, fault tolerance, SLOs, capacity planning, and distributed system troubleshooting
• Awareness of cost and security practices including FinOps optimization, secure-by-design principles, and compliance tooling

Learn more about the LexisNexis Risk team and how we work here

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