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
TPBN1_UKTJ
Senior AWS DevOps Engineer – IaC, CDK, Terraform, Python, OIDC, IAM in City of London employer: Smart Sourcer Limited
Join a forward-thinking company at the forefront of the data centre construction revolution, where your role as a Project Manager will be pivotal in shaping the future of AI. With a strong emphasis on employee growth and a collaborative work culture, you will have access to comprehensive training and development opportunities while working in vibrant locations like Central London and High Wycombe. Enjoy competitive remuneration and benefits, all while contributing to high-impact projects that drive innovation in engineering and infrastructure.
