Principal Software Engineer - Contractor

As a Principal Software Engineer with a Frontend UI UX speciality within the Product Engineering and Technology division, you will define interaction architecture and deliver high‑assurance mission‑critical digital platforms. Operating in an Agile environment you will solve complex usability challenges related to real‑time data synchronisation, cryptographic state visualisation and secure content handling. This role requires a hybrid skill set that blends expert proficiency in design tools Figma with robust front‑end engineering Vue.js

and Type Script. The position combines UX ownership with production‑level UI implementation ensuring WCAG‑compliant interfaces that remain intuitive under high operational stress. The engineer is expected to translate UX concepts into shipped front‑end code, owning interface quality from design through deployment while collaborating closely with product and engineering teams.

• Complex Interaction Design
  • Architect user flows for applications requiring real‑time state updates and low‑latency user feedback.
  • Design unobtrusive visual indicators for data integrity, encryption status and content protection layers without disrupting the user journey.
  • Ensure the shipped code accurately reflects the complex cryptographic state of the underlying platforms.
• Front‑End Engineering & Integration
  • Independently develop pixel‑perfect responsive components using Vue.js and Type Script.
  • Implement complex client‑side logic to handle dynamic content rendering and secure data presentation layers.
  • Ensure seamless integration with RESTful APIs and real‑time Web Sockets for live telemetry data.
• Design System Stewardship & Implementation
  • Maintain and expand the internal Design System's icons, typography and atomic components to ensure visual consistency and code reusability across web, mobile and desktop environments.
  • Create high‑fidelity interactive prototypes in Figma to validate complex workflows and state transitions with engineering stakeholders, translating those prototypes into robust production‑ready code.
• Security‑Centric UX & Accessibility
  • Transform abstract security concepts (e.g., identity verification, data classification, regulatory compliance) into clear, actionable and human‑readable interface elements.
  • Champion inclusive design by ensuring all interfaces strictly adhere to WCAG
    2.1 AA standards and conducting audits to guarantee usability across diverse enterprise and government demographics.

• Bachelor’s or Master’s degree in Computer Science, Design, Human‑Computer Interaction (HCI) or a related field.
• 8 years of professional experience in UI/UX design and front‑end engineering.

• User Experience Design (SFIA HCEV Level
  3)
  • Executes user research and evaluation.
  • Analyzes and describes user goals and the context of use.
• Programming Software Development (SFIA PROG Level
  3)
  • Designs, codes, verifies, tests, documents, amends and refactors complex front‑end components and integration services.
  • Applies agreed standards and tools to achieve well‑engineered outcomes, bridging the gap between interaction design and production‑ready Vue.js infrastructure.
• Front‑End Engineering
  • Strong proficiency in HTML5, CSS3 and Type Script, including secure integration of complex RESTful APIs and real‑time Web Sockets.
  • Mandatory professional experience with the Vue.js ecosystem, Pinia and Vue Router.
• Interaction Design
  • Experience designing for real‑time data, Web Socket updates or information density.
• Design Tooling
  • Expert proficiency in Figma, Auto Layout, Components and Prototyping.
• Accessibility
  • Comprehensive understanding of WCAG
    2.1 AA guidelines and ARIA roles.
• Design Articulation
  • Proven ability to articulate and defend complex design decisions to engineering and product stakeholders in fluent English.
• User Empathy
  • Deep commitment to representing the Voice of the User in technical discussions.
• Precision
  • Uncompromising standard for visual precision and interaction fidelity.