Senior Software Developer

Senior Software Developer

Department: Cyber Services and Capabilities

Employment Type: Full Time

Location: G  London

This role is a Full Stack JavaScript Developer is responsible for designing, building, and maintaining secure, scalable, and high quality applications that extend and enhance our ITSM platform (Service Now).

Operating within a cybersecurity‑focused Managed Services environment, this role requires strong full‑stack JavaScript expertise across backend, frontend, and API development, combined with a security‑first mindset. The developer will take ownership of end‑to‑end solutions—from requirements and design through implementation, testing, and support—working closely with Service Now administrators, engineers, and business stakeholders.

• Application Development:
  Design and develop custom JavaScript applications within our Service Now platform to automate business processes and resolve complex operational challenges.
• Requirements Gathering:
  Collaborate with stakeholders across the organization to understand their needs and translate them into technical solutions within Service Now.
• Security & Compliance:
  Implement secure coding practices aligned to SSDLC principles, including data protection, access control, and auditability.
• Customization and Integration:
  Customize existing applications and integrate with external systems and APIs to enhance functionality and user experience.
• Quality Assurance:
  Conduct thorough testing of developed applications and solutions. Ensure compliance with coding standards and best practices.
• Continuous Improvement:
  Identify technical debt and opportunities to improve platform reliability, developer experience, and delivery velocity.
• Documentation and Support:
  Create comprehensive documentation for developed applications and provide ongoing support and enhancements based on user feedback.
• Collaboration:
  
  Work closely with the System Administrators and other IT team members to ensure seamless implementation and operation of developed applications.

• Very strong knowledge of JavaScript, NodeJS and the React framework
• Experience with modern JavaScript tooling (ES6+, npm, build pipelines)
• Experience designing and consuming APIs in production environments
• Ability to write clean, maintainable, well‑documented code
• Understanding of Secure authentication & authorisation techniques
• Strong knowledge of both Server and Client Side JavaScript development
• General programming skills and understanding of secure software development lifecycle (SSDLC)
• Excellent communication and teamwork abilities
• Ability to manage multiple projects simultaneously and meet deadlines
• Creative thinking and problem‑solving skills

• Bachelor’s degree in computer science, information systems, or related field
• Significant demonstrable experience specific to Full Stack JavaScript development.
• Other relevant certifications.
• Experience working in a security‑focused environment
• Knowledge of the Service Now Ecosystem is not a requirement, but would be useful.

• Flexible Working
  :
  Balance your work and personal life with our flexible working options.
• Generous Holiday Allowance
  :
  Enjoy 25 days of holiday, plus bank holidays, with the option to buy up to 5 additional days of annual leave.
• Medicash & Critical Illness Scheme
• Financial & Investment Benefits
  :
  Enjoy peace of mind with our Pension, Life Assurance, and Share Save Scheme.
• Community & Volunteering Programmes
  :
  Make a difference in your community with our volunteering opportunities.
• Green Car Scheme
  :
  Drive green and save money with our eco‑friendly car scheme.
• Cycle Schem
  e:
  Stay fit and healthy with our cycle-to-work scheme.
• Special Time Off
  :
  Take time off for those big moments in life, like getting married/entering into a civil partnership, becoming a grandparent, and welcoming home a new pet.
• Family Planning
  :
  Benefit from our generous maternity and paternity leave, as well as time off and support for those undergoing fertility treatments.