Senior Frontend Engineer, SDV UI & API Platform

42dot Inc.; Warszawa; On-site; PLN 170,000 - 230,000; Full time

Job summary

42dot Inc. is seeking a Senior Frontend Engineer to shape the user-facing layer of our Software Defined Vehicle platform.

You will build dashboards, variant management, partner portals, and tooling that empower internal engineers and external partners to interact with our SDV OS tooling. You will work with real-time vehicle state dashboards, public API contracts, and 3D vehicle visualizations, collaborating closely with design and backend teams.

Qualifications

• 5+ years production experience with React and TypeScript.
• Experience designing and evolving OpenAPI 3.x specifications and tooling (validators, mocks, client generators).
• Strong schema-first instincts (Zod, JSON Schema, runtime validation).
• Solid understanding of REST and streaming protocols (Server-Sent Events, WebSocket).
• Practical experience integrating 3D content in the browser with three.js or react-three-fiber.
• Strong code review culture and collaboration with backend and design counterparts.
• Fluent English.

Responsibilities

• Design, document and evolve the public REST and Server-Sent Events API surface of our virtual vehicle platform, including OpenAPI specifications and generated partner clients.
• Implement and maintain the production frontend in React and TypeScript: real-time vehicle state dashboards, vehicle variant management, partner-facing portals, configuration and scenario tooling.
• Integrate 3D vehicle assets (glTF) into the frontend using three.js or react-three-fiber, in close collaboration with our product designer.
• Build the developer experience around the schema: typed clients, runtime validation, mocks, contract tests, generated documentation.
• Own resilience of streaming UI components: reconnection, backpressure, multiplexed event handling.
• Participate directly in technical conversations with external integration partners, including API design reviews and partner-facing written guides.

Skills

React

TypeScript

OpenAPI

Schema validation

REST

Server-Sent Events

WebSocket

3D in browser

three.js

code review

English fluency

Education

Bachelor's degree in Computer Science or related field

Tools

three.js

Job description

42dot Inc. is seeking a Senior Frontend Engineer to shape the user-facing layer of our Software Defined Vehicle platform.

You will build dashboards, variant management, partner portals, and tooling that empower internal engineers and external partners to interact with our SDV OS tooling. You will work with real-time vehicle state dashboards, public API contracts, and 3D vehicle visualizations, collaborating closely with design and backend teams.