AI-First Front-End Engineer (Hybrid + Training)

arsys; Alcobendas; Hybrid; EUR 55,000 - 75,000; Full time

Benefits offered by this job

Health insurance

Daycare allowance

Meal vouchers

Flexible working hours

Hybrid work

Job summary

Arsys, a leading Spanish IT company with offices in Logroño, Madrid, Barcelona, Seville and Valencia, seeks a frontend expert to own the JavaScript layer of EuroOffice. You will drive code architecture, optimize rendering performance, and integrate AI into daily development and debugging workflows.

You will work across modern JS/TS, embrace AI as a development multiplier, and collaborate in English with a multicultural team.

Qualifications

• Expertise in Modern JS/TS with performance focus.
• AI-first orchestration in daily development.
• English for technical collaboration.
• Experience debugging legacy code and complex systems.

Responsibilities

• Coding Excellence: write and review clean JS/TS.
• Rendering & Loading Performance: fix bottlenecks (TTI, load time, re-renders).
• Feature Refinement: sharpen shipped features based on usage patterns.
• Bug Research: trace and resolve complex issues across large codebases.
• AI Integration: utilize AI across workflows to accelerate implementation.

Skills

Modern JS/TS

AI-First Development

Browser performance

English fluency

Debugging legacy code

Tools

DevTools/Lighthouse

Canvas/WebGL

Job description

Arsys, a leading Spanish IT company with offices in Logroño, Madrid, Barcelona, Seville and Valencia, seeks a frontend expert to own the JavaScript layer of EuroOffice. You will drive code architecture, optimize rendering performance, and integrate AI into daily development and debugging workflows.

You will work across modern JS/TS, embrace AI as a development multiplier, and collaborate in English with a multicultural team.