Software Engineer (API / Integration / AWS)

Software Engineer API's and Integration | Java / TypeScript | AWS | APIs

Permanent, Market+ Salary and Bonus

Location: UK Remote, Home-Based

We're looking for an API Software Engineer to join a growing engineering team responsible for building and evolving a critical API platform sitting between customer-facing applications, third parties and core business systems.

This is a great opportunity for an engineer who enjoys working on APIs, integrations and cloud-native platforms , and wants to play a key role in the evolution from a mature Java-based API platform to a modern TypeScript architecture .

The platform is already live and being used by major third parties, with the next phase focused on expanding the TypeScript architecture, introducing new endpoints and continuing to build a scalable, well-structured API platform.

What you'll be doing

You'll join an engineering team of around 8 developers , working closely with a Delivery Lead and other technical teams.

Your work will include:

• Designing, developing and maintaining REST APIs used by internal and external customers.
• Building new functionality using TypeScript and modern API development practices .
• Helping evolve an existing Java / Maven API platform as the architecture moves increasingly towards TypeScript.
• Building integrations between external applications, third-party systems and internal platforms.
• Developing APIs that allow third parties to access product and customer information, retrieve pricing and place orders.
• Working with OpenAPI standards to design clear, consistent and maintainable APIs.
• Developing within a containerised, cloud-based environment , with services deployed into clusters.
• Working with AWS and technologies such as Docker, ECS/Fargate and API Gateway .
• Writing automated unit, integration and performance tests.
• Supporting CI/CD pipelines and contributing to a strong DevOps culture.
• Troubleshooting production issues and improving API performance, reliability and scalability.
• Contributing to architecture and technical decisions as the API platform continues to evolve.
• Producing clear technical documentation and sharing knowledge across the team.

The technology

The existing platform has a strong Java / Maven foundation and has been progressively modernised into a containerised cloud environment.

The newer generation of the platform is being developed using TypeScript , with the team now looking to build out this architecture further.

You'll ideally have experience with some of the following:

• TypeScript or Java
• RESTful APIs
• JSON
• AWS
• Docker / containerisation
• ECS / Fargate
• API Gateway

A solid Java background with some TypeScript experience would be a strong fit , as would a TypeScript-focused engineer with a good understanding of API development and modern cloud environments.

What we're looking for

We're particularly interested in engineers who:

• Have professional experience building APIs and integrations .
• Understand good API design principles and modern REST/OpenAPI standards.
• Have experience working with cloud-based, containerised applications.
• Are comfortable working within an existing architecture while also helping shape what's next.
• Can break down complex technical ideas and explain them clearly to both technical and non-technical stakeholders.
• Take ownership of their work and care about building well-engineered, maintainable software.

Why this role?

This is an opportunity to join a team where the API platform is central to how customers and third parties interact with the wider technology estate .

You'll be working on a platform that is already live and used externally, while helping shape its next generation, moving towards TypeScript, modern API standards and cloud-native architecture .