AI-Integrated Front-End Developer

IONOS Group; Comunidad Valenciana; Ibrido; EUR 60.000 - 90.000; Tempo pieno

Vantaggi offerti da questo lavoro

Health insurance

Daycare allowance

Meal vouchers

Flexible working hours

Hybrid work in multiple offices

Arsys events

Descrizione del lavoro

Arsys is seeking a seasoned JavaScript/TypeScript engineer to own the client-side layer in EuroOffice, shaping architecture, performance, and debugging strategies. You will apply AI-driven workflows to development, logging, and documentation while maintaining a high bar for code quality.

You will collaborate across teams, optimize rendering pipelines, and investigate complex issues in legacy code. This role supports flexible hybrid work across our Spain offices in Logroño, Madrid, Barcelona,

Competenze

• Expertise in modern JS/TS with high-quality coding standards.
• Ability to apply AI as a development multiplier in everyday tasks.
• Experience with performance profiling and optimization in browsers.
• Comfort navigating and debugging large, legacy codebases.

Mansioni

• Write and review clean JavaScript/TypeScript with sound state management.
• Identify and fix rendering and loading bottlenecks across DOM/Canvas surfaces.
• Refine features based on production usage and edge cases.
• Trace and resolve complex issues across large codebases.
• Leverage AI to analyze logs/traces and maintain real-time docs.

Conoscenze

Modern JS/TS

AI-driven Dev

Code architecture

Browser performance

English fluency

Legacy debugging

Canvas/WebGL

Descrizione del lavoro

The Mission

You will own the JavaScript layer in EuroOffice, setting the bar for code architecture, loading and rendering performance, and deep bug investigation. In this role, AI is not a separate specialty, but a core working method woven into how you build, debug, and refine software.

Key Responsibilities

• Coding Excellence: Write and review clean, well-architected JavaScript/TypeScript with sound state management, creating code that both engineers and AI models can easily reason about.
• Rendering & Loading Performance: Identify and fix performance bottlenecks (TTI, load time, unnecessary re-renders, bundle bloat) across DOM and Canvas surfaces.
• Feature Refinement: Continuously sharpen shipped features based on production usage patterns and real-world edge cases.
• Bug Research: Trace and resolve complex, non-obvious issues across large and partially undocumented codebases.
• AI Integration: Utilize AI across all workflows to accelerate implementation, analyze logs/traces, and maintain real-time documentation.

Core Requirements

• Expertise in Modern JS/TS: High standards for code quality, architectural integrity, and browser performance (rendering pipeline, profiling via DevTools/Lighthouse).
• AI-First Orchestration: Demonstrated experience using AI as an everyday development multiplier. You let AI handle the initial pass while you bring the technical judgment, validation, and architectural rigor.
• English Fluency: English domain for daily technical communication and team collaboration.
• Debugging & Legacy Navigation: Comfort working with complex, legacy code and pursuing non-linear bug investigations to resolution.
• Bonus: Familiarity with Canvas or WebGL.

Benefits

• Fixed salary and flexible benefits such as health insurance, daycare allowance, and meal vouchers.
• Flexible working hours to organize your schedule according to your needs.
• Ability to work hybrid in any of our offices located in Logroño, Madrid, Barcelona, Seville or Valencia.
• Invitation to our Arsys events, held twice a year, where we team build and throw a great party for our employees.
• Personalized training in cutting-edge technologies, certifications, or any area that interests you.
• Various employee discounts for activities and products.
• We have a motivated, innovative team that is continuously learning. A culture where your opinion and initiative matter. We want to hear your ideas and see you put them into practice.

At Arsys we value diversity and welcome all applications regardless of, for example, gender, nationality, ethnic or social origin, religion, disability, age, as well as sexual orientation and identity, physical characteristics, marital status or any other irrelevant factor subject to applicable law.