Senior Design Engineer (React)

TL;DR

Senior Design Engineer (React/AI): Designing and implementing API and integration experiences with an accent on developer-facing surfaces and AI-native workflows. Focus on transforming design concepts into production-ready React components and establishing design engineering practices.

Location: Must be based in Spain

Salary: 31,000–40,000 PLN per month (for candidates based in Poland)

Company

A growing SaaS product specializing in digital agreement workflows and AI-powered integration experiences.

What you will do

• Own the end-to-end design and implementation of API and integration experiences and developer-facing surfaces.
• Design and prototype AI-native experiences for modern assistant ecosystems and agent-driven workflows.
• Transform design files and product ideas into production-ready React components.
• Establish and evolve Design Engineering practices as the first specialist in this function.
• Collaborate with product, research, and engineering teams to define technical surfaces and user expectations.

Requirements

• Strong experience combining product design and frontend engineering with a portfolio of shipped interfaces.
• Advanced proficiency in React, TypeScript, and modern CSS.
• Experience with APIs, developer tools, and developer experience (DX) principles.
• Proficiency with AI-assisted development tools such as Cursor, Claude Code, or Copilot.
• Must be based in Spain.
• English: B2+ required for collaboration in a global remote-first environment.

Culture & Benefits

• Fully remote work environment with optional office access in selected locations.
• Flexible engagement models: employment contracts, EoR, or B2B contracts.
• Work schedule aligned with European time zones.
• Supportive and transparent culture with a focus on constructive feedback.
• Opportunity to work on a stable SaaS product with startup-level agility.