Contract Senior Full Stack Developer – Java 21 / React / AWS

Talan; Greater London; On-site; GBP 70,000 - 90,000; Full time

Job summary

Talan, part of the Talan Group, seeks a Senior Full Stack Developer to build a Forms capability using Java 21/Spring Boot backend and React/Vite/TanStack frontend, containerized for AWS EKS. REST/JWT integration will leverage existing platform services such as Cognito and S3.

The contract spans 1 month with a possible extension and requires UK-based work eligibility and BPSS clearance. Flexible approach to working is valued.

Qualifications

• Senior full stack developer with backend Java and frontend React skills.
• Experience deploying containerized apps on AWS EKS.
• UK BPSS clearance eligibility is required.
• Contract role for 1 month with possible extension.

Responsibilities

• Build a Forms capability with a Java 21 / Spring Boot backend and a React / Vite / TanStack frontend portal.
• Containerize services and deploy on AWS EKS, integrating via REST APIs and JWT.
• Hard-code forms per use case and generate a single immutable submission snapshot per period.
• Ensure a common, scheme-independent codebase with environment-specific configurations.
• Support production deployments and multi-environment configurations as needed.

Skills

Java 21

Spring Boot 3

React

AWS

AWS EKS

REST APIs

JWT

Docker

Kubernetes

Tools

Docker

Kubernetes

Job description

Contract Senior Full Stack Developer – Java 21 / React / AWS

• Contract

Talan (part of the Talan Group) is an expert provider of professional services. Our vision and mission is to take positive action in a complex world for the future good of people and the environment and to enlighten and enable our clients’ transformation in an increasingly complex world.

We are purpose-driven, working across multiple sectors, tackling social and environmental challenges, improving and simplify the way markets work, harnessing the power of digital transformation and ensuring data is protected and used ethically.

Talan provides a range of consultancy and outsourcing capabilities including programme management, market design and governance. We also have extensive and award-winning capabilities across cyber security, data privacy and digital transformation. We are Great Place to Work accredited.

The nature of what we do means we are very much a people business. The contribution every member of the team makes to our diverse range of experience, skills and personalities is valued. We invest heavily in learning and development to enable our people to develop skills and gain experience which will enhance career prospects for life. Many who started their careers with us have rapidly progressed to more senior positions.

No two days are the same, but we believe in a flexible approach to working which we know our employees value.

We are looking for a Senior Full Stack Developer.

The role is to build a new Forms capability consisting of a Java 21 / Spring Boot 3 backend service and a React / Vite / TanStack frontend portal, both deployed as containers on AWS EKS.

The solution will reuse existing platform services for users, projects, project assignments, document storage/S3, Cognito authentication and SES email, integrating with them through REST APIs and JWT.

Forms will be hard-coded for each use case, rather than generated dynamically from configuration. For each reporting period, the system will create a single immutable submission snapshot, with no version history. Project totals will only be updated once a submission is approved, using a single transactional update.

The application should use one common, scheme-independent codebase, with lightweight configuration applied for each deployment. Production deployments will be separated as required, while lower environments may support multiple configurations.

This is a contract of 1 month with 1 month extension possible.

The contractor must be UK-based and eligible to obtain BPSS clearance.

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