Software Engineer / Developer (AWS, Python, Terraform) (SC / DV Ckeared)

La Fosse Associates; Greater London; On-site; GBP 100,000 - 125,000; Full time

Job description

Software Engineer / Developer (AWS, Python, Terraform)

Location : UK (Hybrid / Remote – clearance dependent)

Security Clearance : SC or DV required

Engagement : Contract (Inside IR35)

Sector : Public Sector / Defence / National Infrastructure

The Role

We are working with a secure public-sector programme delivering mission-critical digital services used at national scale.

They are looking for an experienced Software Engineer / Developer with strong cloud-native engineering skills to design, build, and operate modern systems in highly regulated environments.

This is a hands-on engineering role — you will be writing production code, working closely with infrastructure, and contributing across the full delivery lifecycle.

Please note : Due to the nature of the work, active SC or DV clearance is mandatory .

What You’ll Be Doing

Designing and building cloud-native applications on AWS

Developing backend services and APIs , primarily in Python

Defining and maintaining infrastructure using Terraform

Working across the full SDLC : design, build, test, deploy, and operate

Collaborating with product, platform, and security teams in agile delivery

Supporting secure, scalable, and resilient systems in production

Contributing to CI / CD pipelines and operational best practices

Working on systems that matter — national services, defence, or critical infrastructure

Essential Skills & Experience

Active SC or DV clearance (non-negotiable)

Strong experience as a Software Engineer / Developer

AWS (e.g. Lambda, ECS / EKS, EC2, S3, RDS, API Gateway)

Python used in production environments

Terraform (infrastructure as code)

Experience building APIs and backend services

Familiarity with CI / CD pipelines and cloud deployment

Comfortable working in secure or regulated environments

Nice to Have

Experience with FastAPI, Flask, Django , or similar frameworks

Exposure to frontend technologies (React, Next.js, Angular)

Experience with containerisation (Docker, Kubernetes)

Background in public sector, defence, or government programmes

Understanding of DevSecOps and cloud security best practices

Experience supporting live services at scale

What’s on Offer

Work on high-impact, nationally significant systems

Modern cloud and engineering practices

Highly skilled, clearance-holding engineering teams

Flexible working arrangements (where clearance allows)

Competitive day rate or salary (dependent on clearance and experience)

Eligibility

Due to the security requirements of this role, applicants must already hold active SC or DV clearance . Unfortunately, we cannot sponsor clearance for this position.