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Callen-Lenz
Callen-Lenz
201 – 500 Employees
ConsultingDefenseManufacturing
Callen-Lenz is a company associated with the defense, manufacturing, and consulting sectors. Its online presence uses bot-detection and web application security controls to manage automated traffic and protect access to its website. This profile provides context for professionals researching Callen-Lenz and potential opportunities with the company.
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Front-End Software Engineer (Hybrid, Bristol)

Develop responsive flight-control and ground-station interfaces for Callen-Lenz’s crewed and uncrewed aircraft systems. Build React and TypeScript software as part of agile aerospace teams.

GBUnited Kingdom
£50,000 – £60,000 / year
HybridFull-timeMiddleSeniorEnglish RequiredFrontend EngineerSoftware Engineer
CypressJestReactTypeScript

Description

  • Help design and develop flight-control and ground-station software with modern web technologies.
  • Contribute to software engineering activities spanning design, implementation, and testing.
  • Work with the team to design and develop user interfaces.
  • Partner with UX researchers and designers, developers, and project managers.
  • Take part in sprint planning and estimation within a cross-functional team.
  • Create precise, responsive interfaces that match approved designs.
  • Help establish and maintain a robust design system.
  • Release software incrementally against project milestones and deadlines.
  • Contribute to decisions about appropriate tools, standards, and development processes.
  • Participate in code reviews and add suitable test coverage.
  • Develop and implement features that satisfy defined acceptance criteria.
  • Carry out other related responsibilities as needed.
  • Actively support workplace health and safety.
  • Record hazards and incidents accurately and through the correct channels.
  • Complete required health and safety training.

Requirements

  • A degree in computing or a related discipline.
  • A demonstrable track record as a front-end software engineer.
  • Practical experience creating high-fidelity interfaces in Figma or a similar design tool.
  • Hands-on experience with real-time applications.
  • Confidence contributing within a cross-functional agile team.
  • Strong practical knowledge of React, TypeScript, HTML, CSS, Git, and Jira or comparable tools.
  • Familiarity with Figma or an equivalent interface-design platform.
  • Working knowledge of Jest, Cypress, React Testing Library, or similar testing tools.
  • Ability to integrate and work with APIs.
  • Understanding of WebSocket or comparable streaming technologies.
  • Strong written and verbal communication skills.
  • An interest in drones, aviation, data-intensive applications, or geospatial systems.
  • Experience mentoring and coaching junior engineers.
  • Familiarity with accessibility standards.
  • Previous experience in the defence sector.
  • Commitment to maintaining strong coding standards.
  • A clear focus on accessibility and UI/UX principles.
  • Current knowledge of design practices covering responsive layouts, accessibility, and maintainable interface patterns.
  • British citizenship or an existing right to work in the UK.
  • Willingness to undertake occasional national and international travel.
  • A full, valid UK driving licence.
  • Ability to obtain security clearance, including five years of UK residency.
  • Permission to work in the UK by the employment start date.
  • Ability to achieve Baseline Personnel Security Standard clearance.

Benefits

  • 25 days of annual leave each year, plus bank holidays.
  • Holiday buy-and-sell scheme allowing up to five additional days in either direction.
  • Pension scheme provided through Royal London.
  • Company-contributed Share Incentive Plan.
  • Green Car Scheme.
  • Life assurance worth six times basic salary.
  • Income protection covering 75% of basic salary.
  • Private health insurance through Bupa.
  • Private dental insurance through Bupa.
  • Enhanced maternity and paternity leave.
  • Reimbursement for one professional membership each year.
  • One paid volunteering day annually.
  • Year-round access to an independent financial adviser.
  • Training and professional development opportunities.

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