Dex

frontend engineer for real-time sensor intelligence

In short

This senior frontend engineer role is at a seed-stage startup building real-time operational intelligence from existing sensor and camera data. The job involves architecting core frontend components for complex real-time data visualization, owning full frontend workstreams within a small autonomous team, and working with React, TypeScript, gRPC/protobuf, and real-time data flows (WebSockets, web workers). It demands significant production experience and a strong sense of UX, accessibility, and visual design. The role is hybrid, based in London.

About the Company
The company turns data from existing sensors and cameras into real-time operational intelligence, helping teams detect threats, retrace events, and act decisively without costly hardware overhauls. It is a rapidly scaling, seed-stage team built on radical candor and high individual autonomy.
Responsibilities
•Architect and build core frontend components that transform complex, real-time sensor data into intuitive, navigable operational intelligence
•Drive the end-to-end development of customer-specific workflows, extending the platform's foundational interfaces across diverse sectors
•Translate high-level concepts and prototypes into production-ready features, ensuring robust and scalable abstractions for rapid growth
•Collaborate closely with a small, autonomous engineering team, often owning entire frontend workstreams from design to deployment
•Ensure performance and responsiveness for dynamic interfaces handling continuous data streams
Requirements
•Significant production experience with React, TypeScript, Vite, and Tailwind CSS
•Comfort with gRPC/protobuf at the API layer
•Ability to build performant, dynamic interfaces for complex data visualization, prioritizing clarity and ease of understanding
•Deep comfort with real-time data flows and asynchronous patterns, including WebSockets and web workers
•Track record of writing testable, reusable code
•Experience maintaining design systems and using testing frameworks such as Vitest, Jest, or Playwright
•Strong, demonstrated sense of user experience, accessibility, and visual design
Conditions
•Salary up to £130k

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