Job Specifications
Senior Frontend Engineer (React/TypeScript) - SC Cleared (MOD)
3-month contract (extendable)
PS550-PS600/day
Outside IR35
Hybrid - Thames Valley
Join a cutting-edge UK-based AI company building intuitive, high-performance interfaces for generative AI platforms. We're seeking a Senior Frontend Engineer to lead the development of user-facing experiences that make advanced AI capabilities accessible, elegant, and production-ready.
This is a unique opportunity to shape the frontend architecture of secure, scalable AI systems deployed in regulated sectors. You'll work across product, backend, and AI teams to deliver performant, responsive web applications with real-time streaming capabilities.
The Role:
Ownership of frontend architecture for AI-driven chat platforms, from design to deployment
Development of scalable SPAs using React 19, TypeScript, and Vite for optimal performance
Implementation of authentication flows with Azure MSAL/OAuth2 and secure session handling
State management using Zustand and TanStack Query for seamless client-server sync
Integration of streaming AI endpoints via AI SDK React, including WebSocket handling and graceful degradation
Deployment via Docker containers with multi-stage builds and CI/CD pipelines using GitHub Actions
Collaboration with DevOps for AWS CloudFront/S3 delivery, caching, and CDN optimization
Accessibility leadership (WCAG 2.1 AA), cross-browser testing, and performance monitoring via Web Vitals
Security-first development including CSP headers, XSS prevention, and secure API communication
Mentorship and technical leadership across frontend best practices and performance optimization
Experience Required:
Active SC clearance for MOD work
5+ years of frontend development with React and TypeScript in production environments
Proven experience building complex SPAs with modern routing and state management
Deep understanding of browser APIs, performance optimization, and responsive design
Familiarity with Vite, pnpm, Git workflows, and OpenAPI integration via tools like Orval
Experience with WebSockets, real-time data handling, and secure API communication
Strong communication skills and ability to mentor and influence frontend standards
This role is urgent and interviews can be arranged quickly. If you're ready to lead frontend delivery at the intersection of AI and user experience, and you hold SC clearance (MOD), apply now for immediate consideration.
DISCLAIMER: No terminology in this advert is intended to discriminate on the grounds of age, sex, race, religion or belief, disability, pregnancy and maternity, marriage and civil partnership, sexual orientation, gender, and/or gender reassignment. We welcome applications from all qualified candidates. Attis Global Limited operates as an employment business and agency.
Keywords for search: React Frontend Engineer, SC Cleared Contractor, AI UI Developer, TypeScript SPA Architect, Secure Chat Platform, Vite Build Expert, WebSocket Integration, OAuth2 Auth Flow, Real-Time UI Developer, Accessibility Lead, GitHub Actions CI/CD, AWS CloudFront Deployment, Streaming AI Frontend, Regulated Sector UI, CSP/XSS Secure Frontend
About the Company
Attis are an AI & Data Executive Search & Recruitment company dedicated to connecting the Geospatial sector across the USA & UK with the best AI & Data talent to drive positive change.
Expertise in:
EO & Remote Sensing
Space Operations
GIS and GEOINT
Climate & Weather
With a combined 25 years’ experience recruiting in the sector, we understand that technology can be a powerful force for good, and believe that businesses striving to make this change deserve a talent partner who share in their mission.
This is why we ...
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