Senior Infrastructure Engineer
Posted Updated 15
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Summary
Senior Infrastructure Engineer owning the AWS cloud infrastructure behind a Cardiff fintech's SaaS products and internal tooling: designing, building and operating production platforms with EC2/ECS/EKS, Terraform, CI/CD and observability, scripting in Python/Bash/PowerShell, and mentoring junior engineers.
Location: Cardiff, hybrid working
Salary: up to £65,000 depending on experience plus a potential bonus up to £13,000
The RoleAs our Senior Infrastructure Engineer, you will:• Take ownership of the cloud infrastructure that underpins our SaaS products and internal tooling – this will be your primary focus.• Plan, implement and test solutions independently, from initial design through to delivery.• Analyse our existing infrastructure and propose improvements.• Build proof-of-concept solutions to evaluate new technologies.• Write clear documentation so others can understand and build on your work.• Mentor junior engineers on technology, architecture and best practices.• Get involved with other technology streams, such as Oracle Database & Middleware Administration and End User Computing, learning these technologies and helping the wider team support them (no prior experience needed).
What you’ll bring• A self-starting approach – you're comfortable owning a problem from planning through to tested delivery.• Curiosity and an appetite for exploring new technologies.• A genuine enjoyment of sharing knowledge and helping others grow.• A belief that constant learning underpins good engineering.
RequirementsEssential:• Ability to design, build, and operate cloud infrastructure that supports production services, with an understanding of how platforms evolve to meet changing technical and business needs.• Strong hands-on knowledge of core AWS services such as EC2, VPC, ECS, EKS, RDS, and IAM, alongside a practical understanding of cloud security, networking (VPCs, subnets, routing, gateways, firewall rules, NAT), and scalability.• Experience with container orchestration – we currently use ECS and are reviewing a potential migration to EKS.• Proven use of Infrastructure-as-Code tools (for example, Terraform or similar) to deliver repeatable, version-controlled, and well-governed infrastructure.• Experience building and improving CI/CD pipelines that enable automated, reliable delivery of infrastructure and platform changes.• Working knowledge of observability practices and tooling, including metrics, logging, and alerting, with an understanding of how observability supports reliable operations and incident response.• Strong scripting skills in a language such as Python, Bash, or PowerShell to automate operational tasks and workflows.
Desirable:• Working knowledge of Microsoft 365 services such as Entra ID, Intune, Defender, and Conditional Access, particularly in security-conscious environments.• Exposure to Oracle Database, Oracle middleware, or PostgreSQL administration – or a willingness to learn.• Experience administering Linux and Windows machines, both directly via the command line and through configuration management with Ansible.
Salary: up to £65,000 depending on experience plus a potential bonus up to £13,000
The RoleAs our Senior Infrastructure Engineer, you will:• Take ownership of the cloud infrastructure that underpins our SaaS products and internal tooling – this will be your primary focus.• Plan, implement and test solutions independently, from initial design through to delivery.• Analyse our existing infrastructure and propose improvements.• Build proof-of-concept solutions to evaluate new technologies.• Write clear documentation so others can understand and build on your work.• Mentor junior engineers on technology, architecture and best practices.• Get involved with other technology streams, such as Oracle Database & Middleware Administration and End User Computing, learning these technologies and helping the wider team support them (no prior experience needed).
What you’ll bring• A self-starting approach – you're comfortable owning a problem from planning through to tested delivery.• Curiosity and an appetite for exploring new technologies.• A genuine enjoyment of sharing knowledge and helping others grow.• A belief that constant learning underpins good engineering.
RequirementsEssential:• Ability to design, build, and operate cloud infrastructure that supports production services, with an understanding of how platforms evolve to meet changing technical and business needs.• Strong hands-on knowledge of core AWS services such as EC2, VPC, ECS, EKS, RDS, and IAM, alongside a practical understanding of cloud security, networking (VPCs, subnets, routing, gateways, firewall rules, NAT), and scalability.• Experience with container orchestration – we currently use ECS and are reviewing a potential migration to EKS.• Proven use of Infrastructure-as-Code tools (for example, Terraform or similar) to deliver repeatable, version-controlled, and well-governed infrastructure.• Experience building and improving CI/CD pipelines that enable automated, reliable delivery of infrastructure and platform changes.• Working knowledge of observability practices and tooling, including metrics, logging, and alerting, with an understanding of how observability supports reliable operations and incident response.• Strong scripting skills in a language such as Python, Bash, or PowerShell to automate operational tasks and workflows.
Desirable:• Working knowledge of Microsoft 365 services such as Entra ID, Intune, Defender, and Conditional Access, particularly in security-conscious environments.• Exposure to Oracle Database, Oracle middleware, or PostgreSQL administration – or a willingness to learn.• Experience administering Linux and Windows machines, both directly via the command line and through configuration management with Ansible.
