Full Stack Developer at Cititec Talent Limited, England, £Contract Rate

AWS Full-Stack Developer - Serverless & Cloud Modernisation

Remote IR35: Outside IR35 Start: Immediate/within 1-2 weeks

The Opportunity

We are seeking two experienced AWS Full-Stack Developers to support a major cloud modernisation programme for a UK public-sector organisation.

You will be responsible for migrating a business-critical Legacy application from an on-premise Ingres database and OpenROAD environment to a modern, private serverless AWS architecture.

This is a hands-on opportunity to work with modern AWS technologies and AI-assisted development tools, helping establish a repeatable migration approach for approximately 30 further Legacy systems.

The team is hiring across two areas: application development and cloud infrastructure/data migration. Both developers will work across the full stack.

• Build serverless applications using AWS Lambda, API Gateway, S3, EventBridge and SQS.

• Reverse-engineer Legacy code and migrate business logic into modern applications.

• Develop modern Front End applications to replace Legacy OpenROAD interfaces.

• Migrate Ingres databases to Aurora PostgreSQL, including schema conversion and data reconciliation.

• Build secure AWS infrastructure using VPCs, networking and identity services.

• Implement Infrastructure as Code using Terraform and develop CI/CD pipelines.

• Use AI-assisted tools such as AWS Transform and Kiro to accelerate code analysis and migration.

• Develop automated testing to ensure the new platform matches existing system behaviour.

• Strong commercial AWS development experience, particularly serverless architectures.

• Full-stack development using a modern Front End framework and TypeScript or Python.

• Hands-on experience with Lambda, API Gateway, S3, EventBridge and SQS.

• Relational database migration experience, ideally PostgreSQL or Aurora.

• Experience using AI-assisted development tools for code analysis or modernisation.

• Terraform/OpenTofu and CI/CD experience.

• Understanding of AWS networking, security and private cloud environments.

• Strong automated testing and application validation experience.

• Experience with Ingres, OpenROAD or Legacy 4GL technologies.

• Legacy application modernisation experience (Oracle Forms, PowerBuilder, Progress or Mainframe).

• Aurora PostgreSQL and RDS Proxy experience.

• Previous public-sector or regulated industry experience.

Candidates must have the right to work in the UK and hold BPSS clearance from day one. Eligibility for UK SC clearance is desirable.

Important: Sole UK nationality and a minimum of five years' UK residency are required due to the nature of the customer environment.