Front End Software Engineer

Callen-Lenz

. Support the design and development of flight control and ground station software using the latest web technologies .

Posted 10/5/2026full-timeBristol • United KingdomMid-LevelSenior💰 £50,000 - £60,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Proficient in Front End Software Engineering with a strong focus on designing high-fidelity user interfaces using React, TypeScript, HTML, and CSS. Demonstrates expertise in agile methodologies, API integration, and testing tools while ensuring adherence to accessibility standards and best practices.

Highest-signal resume keywords

Front End Software EngineeringReactTypeScriptFigmaAgile Methodologies

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

HTMLCSSAPI IntegrationJestCypressRTLWebSocketResponsive DesignAccessibility StandardsCoding Standards

Soft Skills

Excellent Communication SkillsMentoringCollaborationProblem-SolvingCommitment to Health and Safety

Tools & Technologies

GitJiraFigmaDesign SystemsTesting Tools

Certifications & Qualifications

Security ClearanceBaseline Personnel Security Standard

Industry Keywords

DronesAviationGeospatial SystemsDefenceReal-Time Applications

Tech Stack

Tools & technologies

CypressJestReactTypeScript

About the role

Key responsibilities & impact

Support the design and development of flight control and ground station software using the latest web technologies
Contribute across all aspects of Software Engineering, including design, implementation and testing
Collaborate on the design and build of user interfaces
Collaborate with UX researchers/designers, developers and project managers
Collaborate during sprint planning and estimations in a cross-functional team
Design and build pixel-perfect, responsive user interfaces
Support the development of a robust design system
Deliver software iteratively to milestones and deadlines
Support decisions around best-practice tooling and processes
Contribute to code reviews and implement appropriate test coverage
Design and implement new software features that meet acceptance criteria
Perform other related duties as required
Demonstrate commitment to workplace health and safety
Report hazards and incidents correctly
Participate in health and safety training when required

Requirements

What you’ll need

Educated to a degree level in a computing related subject
Demonstrable background as a Front End Software Engineer
Proficiency in designing high-fidelity UI in Figma (or similar design tools)
Hands-on exposure to real-time applications
Confidence working within a cross-functional agile team
Strong practical knowledge of React, TypeScript, HTML & CSS, Git, and Jira (or similar tools)
Familiarity with Figma or comparable design platforms
Working knowledge of Jest, Cypress, RTL, or other testing tools
Capability in API integration
Understanding of WebSocket or similar streaming technologies
Excellent verbal and written communication skills
Interest in drones, aviation, data-heavy or geospatial systems
Experience mentoring and coaching junior engineers
Familiarity with accessibility standards
Previous experience working in defence
Champion of coding standards
Prioritisation of accessibility and UI/UX principles
Up-to-date knowledge of design best practices, including responsive design, accessibility and maintainable user interface patterns
Must be a British Citizen or have an existing right to work in the UK
Ability to commit to occasional national and international travel
A full valid UK driving license
Ability to hold Security Clearance – 5 years residence in the UK
Permission to work in the UK by the start of employment
Ability to achieve Baseline Personnel Security Standard

Benefits

Comp & perks

25 days annual leave per year (plus bank holidays)
Buy/Sell holiday policy up to 5 days either way
Pension Scheme via Royal London
Company contributed Share Incentive Plan
Green Car Scheme
Life assurance scheme (6x basic salary)
Income protection policy (75% of basic salary)
Private Health Insurance via Bupa
Private Dental insurance via Bupa
Enhanced Maternity and paternity
1 Professional membership reimbursed per year
1 paid volunteering day per year
Access to an independent financial advisor year round
Training & development opportunities