Senior AWS DevOps Engineer – IaC, Serverless, CDK, Terraform, Python, OIDC, IAM Rules – Outside IR35

Senior AWS DevOps Engineer – IaC, Serverless, CDK, Terraform, Python, OIDC, IAM Rules – Outside IR35

A standout contract opportunity with a global, market‑leading B2B SaaS organisation undergoing a greenfield platform build involving AI adoption, and modern engineering practices. We’re expanding our UK DevOps function and looking for a Senior AWS DevOps Engineer with extensive IaC, serverless and security experience who can operate with high autonomy, make strong technical decisions, and communicate clearly across both technical and non‑technical teams.

What You’ll Be Doing:

You’ll be a key contributor in designing, delivering, and supporting the cloud foundations that power our products and internal platforms, with a strong emphasis on Infrastructure as Code , AWS serverless engineering , and event‑driven architectures . You’ll be expected to work with seniority from day one, owning problems end‑to‑end and driving solutions proactively.

• Designing, building, and maintaining secure, scalable, resilient AWS serverless infrastructure
• Developing automation, tooling, and workflow orchestration using Python and TypeScript
• Implementing complex workflows using AWS Step Functions , Lambda, EventBridge, DynamoDB Streams, and API Gateway
• Building and maintaining IaC using AWS CDK , Terraform , and CloudFormation
• Implementing modern identity and access patterns including OIDC, IAM roles
• Enhancing CI/CD pipelines using GitHub Actions
• Collaborating effectively with engineering, product, and security teams; communicating decisions, trade‑offs, and risks with clarity
• Taking full ownership of tasks from design through delivery, operating independently and making sound technical judgments
• Supporting incident response, including escalation, resolution, and post‑incident improvements
• Documenting systems, processes, and technical decisions with precision
• Handling context switching effectively when priorities shift
• Reducing technical debt and improving operational maturity across environments
• Maintaining a strong security and compliance mindset in all designs and implementations
• Stepping up during high‑pressure events, escalations, and critical incidents
• Ensuring reliable availability during agreed working hours

Who We’re Looking For:

You’ll have deep, hands‑on experience with AWS development and production environments where availability, resilience, and security are non‑negotiable. We’re especially interested in engineers with strong capability across:

• Lambda (Python & TypeScript)
• Step Functions
• DynamoDB & DynamoDB Streams
• EventBridge
• API Gateway
• IAM roles, permission boundaries, OIDC‑based identity flows
• CDK, Terraform & Cloud Formation

You should also bring excellent communication skills and the ability to articulate technical decisions, influence stakeholders, and provide clear updates during incidents or delivery cycles.

Contract Details:

• £550 - £600 per day Outside IR35
• 100% remote
• 8 months rolling