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Senior React Developer

Job Posted: 3 hours ago

Salary: £ 500 - 550 / Day
Job Type: Contract
Location: London

Expire in: a month

Job Description

Senior React Developer

Contract Length: 3 months Rate: (Apply online only) p/d Inside IR35 

Overview

We are seeking a highly skilled engineer with deep expertise in React and Single Sign-On (SSO) implementations, particularly Okta. The successful candidate will combine strong front-end development skills with proven experience in authentication and identity management.

Key Responsibilities

Modernize and refactor an existing Fix UI application:

Update outdated codebase to current React standards.

Improve maintainability and performance.

Implement multi-tenant architecture within the UI.

Integrate the application with SSO solutions, ensuring flexibility to connect with:

OAuth / OpenID Connect

SAML

Okta (primary client requirement).

Deliver clean, scalable, and secure code aligned with best practices.

Collaborate with internal teams to ensure smooth integration and deployment.

Essential Skills & Experience

Expert-level React development (hooks, state management, modern patterns).

Strong background in SSO implementation and identity protocols.

Hands-on experience with Okta integration.

Knowledge of OAuth 2.0, OpenID Connect, and SAML.

Experience building multi-tenant applications.

Ability to refactor and modernize legacy codebases.

Nice-to-Have

Familiarity with other identity providers (Azure AD, Auth0, Ping Identity).

Experience in secure coding practices and compliance frameworks.

Strong problem-solving and communication skills

Before You Apply

Do not include the following in your job application, CV, or cover letter:

Bank details.
National Insurance number.
Date of birth.

You should not be asked for payment or irrelevant information. If you have concerns about a job advert or employer, seek guidance on how to proceed.

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