Frontend Developer

CompanyCognizant

LocationLondon Area, United Kingdom

Posted At2/24/2026

UK Visa Sponsorship Analytics

Occupation Type

Programmers and software development professionals

Occupation Code Skill LevelHigher Skilled

Sponsorship Salary Threshold

£54,700 (£28.05 per hour)

Occupation rate applies

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Description

Role purpose

Design and deliver secure, accessible, and performant front‑end applications for digital services. Build user interfaces and integrations that meet Government Digital Service (GDS) standards and WCAG 2.2 accessibility requirements.

Key outcomes & responsibilities:

Front‑end engineering: develop responsive, standards‑compliant UIs using JavaScript and TypeScript; implement Node.js Express for server‑side rendering and API consumption.
API integration: consume and manage RESTful APIs; ensure robust integration with back‑end layers (database, application, and front‑end).
Security by design: implement IDAM/IdP, SSO, RBAC, SSL/TLS, and KMS; embed secure coding practices and secrets management.
Accessibility & design standards: apply WCAG 2.2 guidelines and GDS design patterns; ensure inclusive, user‑centered interfaces.
Event‑driven features

: integrate with Kafka for event management where required.

Operability & telemetry: instrument front‑end services with AWS telemetry for performance and reliability.

Modern delivery: manage work in Jira/Confluence; use GitHub with trunk/GitFlow; implement CI/CD pipelines with automated tests and security scans.

Quality & performance: optimise for speed, accessibility, and maintainability; apply caching and JSON binding best practices.

Essential skills (must have)

Languages & frameworks: JavaScript, TypeScript, Node.js Express.
API & integration: RESTful API consumption and management; integration with back‑end layers.
Security: IDAM/IdP, SSO, RBAC, SSL/TLS, KMS.
Accessibility & standards: WCAG 2.2 compliance; GDS design patterns.
Event management: Kafka.
Tooling & delivery: Jira, Confluence, GitHub, CI/CD pipelines.

Desirable skills (nice to have)

Architecture: microservices exposure.
Caching & sessions: Redis; session management via Kong.
Realtime comms: SignalR or equivalent.
Data: NoSQL (MongoDB/DocumentDB).

Experience profile

Proven delivery of accessible, secure front‑end applications at scale using JavaScript, TypeScript, Node.js Express, and API integrations.
Strong understanding of WCAG 2.2 and GDS design principles.
Experience embedding security, observability, and automation into the development lifecycle.
Track record of CI/CD discipline and Git best practices.

DDaT capability alignment — Senior Software Developer

Aligned to DDaT capabilities: Modern development standards, Programming & build, Systems design, Prototyping, User focus, and Development process optimisation at senior level.

Ways of working

Agile, product‑led delivery; automated testing (unit, integration, accessibility), security scanning, and performance testing; clear documentation and runbooks.

Location & security

UK‑based, hybrid working as agreed ; Security cleared (Mandatory).

Additional: JSON binding and caching strategies.

About us:

Cognizant is one of the world's leading professional services companies, transforming clients' business, operating, and technology models for the digital era. Our unique industry-based, consultative approach helps clients envision, build, and run more innovative and efficient businesses. Headquartered in the U.S., Cognizant (a member of the NASDAQ-100 and one of Forbes World’s Best Employers 2025) is consistently listed among the most admired companies in the world. Learn how Cognizant helps clients lead with digital at www.cognizant.com