Senior AWS DevOps Engineer - IaC, Serverless, CDK, Terraform, Python, OIDC, IAM Rules - Outside IR35 at Smart-Sourcer, 100% remote (UK only), 8 Months, £550-£600 per day

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