Secure Enclave UI Engineer (React/TS + Mobile) – Hybrid

Valarian Technologies; Greater London; Hybrid; GBP 90,000 - 130,000; Full time

Benefits offered by this job

Equity

Competitive salary

Pension contributions

Private health insurance

Hybrid work setup

Company retreats

Job summary

Valarian Technologies in London builds Acra, a secure-enclave platform for government and commercial workflows. You design, build, and maintain mission-critical frontends using React/TypeScript and native mobile tech (Swift/iOS, Kotlin/Android).

You’ll own front-end systems end-to-end, from architecture to performance, with a strong emphasis on security and usability. You’ll help shape frontend foundations, including modular architectures, CI/CD, offline sync, and secure local storage, while

Qualifications

• Strong React/TypeScript production web app experience.
• Native mobile development with Swift or Kotlin.
• Deep understanding of UI architecture and responsive design.
• Experience consuming/designing REST, WebSocket, or GraphQL APIs.
• Automated testing with Jest, RTL, XCTest/Espresso, Playwright/Cypress.

Responsibilities

• Architect and build high-performance, accessible UIs across React/TypeScript and native mobile clients.
• Own applications from design to testing, deployment, observability and ops.
• Integrate REST/WebSocket/GraphQL APIs with real-time data and offline resilience.
• Develop and maintain a scalable design system for desktop and mobile.
• Address client-side security: token handling, encryption, zero-trust UX.
• Collaborate with product, UX, backend, and security to translate requirements into interfaces.
• Improve frontend performance across browsers and devices; optimize bundle size.
• Establish frontend/mobile testing best practices; drive code quality and docs.
• Operate with ownership in a fast-paced environment.

Skills

React/TypeScript web apps

UI architecture

Responsive design

Security-conscious UX

Tools

React

TypeScript

Swift (iOS)

Kotlin/Android

Job description

Valarian Technologies in London builds Acra, a secure-enclave platform for government and commercial workflows. You design, build, and maintain mission-critical frontends using React/TypeScript and native mobile tech (Swift/iOS, Kotlin/Android).

You’ll own front-end systems end-to-end, from architecture to performance, with a strong emphasis on security and usability. You’ll help shape frontend foundations, including modular architectures, CI/CD, offline sync, and secure local storage, while