Security UI Engineer – React/TS & Mobile (Hybrid)

Valarian Technologies Limited; Greater London; Hybrid; GBP 65,000 - 90,000; Full time

Benefits offered by this job

Equity

Competitive salary

Employer pension contributions

Private health insurance

Hybrid work setup

Company retreats and meetups

Job summary

Valarian Technologies Limited is hiring a Frontend Engineer to design, build, and maintain mission-critical interfaces for Acra, our secure-enclave platform. You’ll blend React/TypeScript dashboards with native mobile clients, delivering zero-trust UX for government and commercial workflows.

You’ll own front-end systems end-to-end, focusing on UI architecture, performance, accessibility, and security while collaborating with product, backend, and security teams.

Qualifications

• Strong professional engineering experience building production-grade web applications with modern React and TypeScript.
• Solid hands-on native mobile development experience with Swift (iOS) or Kotlin/Android.
• Deep understanding of modern UI architecture, state management paradigms, and responsive design systems.
• Experience consuming, designing, and optimizing APIs (REST, WebSockets, or GraphQL).
• Familiarity with client-side security fundamentals and authentication flows.

Responsibilities

• Architect and build high-performance, accessible, and secure user interfaces across React/TypeScript and native mobile clients (Swift/iOS or Kotlin/Android).
• Own client applications from design through testing, deployment, observability, and production operations.
• Integrate complex APIs for real-time data and offline resilience.
• Build and maintain a scalable design system for consistent UX across desktop and mobile.

Skills

React/TypeScript

Swift (iOS)

Kotlin/Android

UI architecture

API design

Testing

Tools

CI/CD

Playwright

Xcode

Android Studio

Job description

Valarian Technologies Limited is hiring a Frontend Engineer to design, build, and maintain mission-critical interfaces for Acra, our secure-enclave platform. You’ll blend React/TypeScript dashboards with native mobile clients, delivering zero-trust UX for government and commercial workflows.

You’ll own front-end systems end-to-end, focusing on UI architecture, performance, accessibility, and security while collaborating with product, backend, and security teams.