Front End Software Engineer

Leidos

Front End Software Engineer at Leidos enhancing national infrastructure through innovative front-end solutions. Collaborating closely with backend teams and mentoring junior developers in React and TypeScript.

Posted 7/21/2026full-timeFarnborough • 🇬🇧 United KingdomJunior💰 £61,500 - £78,800 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in delivering high-quality, production-ready front-end software using React and TypeScript, with a strong focus on SPA design patterns, unit and integration testing, and Agile methodologies. Capable of mentoring other engineers and ensuring adherence to code quality standards and CI/CD practices.

Highest-signal resume keywords

React DevelopmentTypeScript ProficiencySingle-Page Application DesignUnit and Integration TestingAgile Software Development

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Front-End EngineeringSPA DevelopmentComponent CompositionState ManagementModular UI Architecture

Soft Skills

MentoringCollaborationTechnical Coaching

Tools & Technologies

Atlassian Tool SuiteCI/CD PipelinesIntegrated Security Scanning

Industry Keywords

Code Review StandardsQuality GatesProduction Environments

Tech Stack

Tools & technologies

AngularReactTypeScriptVue.js

About the role

Key responsibilities & impact

Deliver high‑quality, production‑ready front‑end software through hands‑on development.
Design, implement, test, document, and deploy modern single‑page applications.
Lead front‑end implementation using React and TypeScript.
Apply strong front‑end engineering practices to ensure solutions are maintainable, modular, well‑structured, and aligned with agreed standards.
Make front‑end technical recommendations within assigned scope, aligning with agreed architectural direction and escalating broader decisions as appropriate.
Ensure adherence to established code review standards and quality gates for all front‑end changes delivered.
Continuously validate and maintain front‑end build and deployment pipelines: Ensure changes do not break build, test, or deployment stages Make improvements as necessary to support reliable front‑end delivery Act as a guide for other developers to ensure pipeline practices are understood and maintained.
Write and maintain unit and integration tests as a standard part of development.
Support and contribute to UI and API test automation efforts, working closely with the test team (who retain ownership of overall outcomes).
Collaborate closely with backend engineers to ensure clean separation of concerns and well‑defined API contracts.
Support Agile delivery practices, including planning, estimation, backlog refinement, and iterative delivery.
Use and support development tooling and processes, including CI/CD pipelines and integrated security scanning.
Mentor and guide other front‑end engineers through code reviews, pairing, and informal technical coaching.
Act as a senior technical point of reference for complex UI and front‑end engineering challenges.

Requirements

What you’ll need

Significant front‑end engineering experience delivering production‑grade single‑page applications.
Modern SPA development experience (required) using React and TypeScript, Angular, or Vue.
Strong understanding of SPA design patterns and best practices, including component composition, state management approaches, and modular UI architecture.
Proven experience delivering complex UI changes in production environments.
Demonstrated experience writing unit and integration tests as a normal part of front‑end development.
Familiarity with Agile software development processes and working within iterative delivery models.
Familiarity with the Atlassian tool suite (e.g. Jira, Bitbucket, Bamboo), or equivalent tooling, with a solid understanding of CI/CD concepts, workflows, and practices.
Experience working with code review standards, quality gates, CI/CD pipelines, and security scanning processes.

Benefits

Comp & perks

Contributory Pension Scheme
Private Medical Insurance
33 days Annual Leave (including public and privilege holidays)
Access to Flexible benefits (including life assurance, health schemes, gym memberships, annual buy and sell holidays and a cycle to work scheme)
Flexi-Time Working