Senior Front End Developer

OpenVPN Inc.; Cataluña; Presencial; EUR 45.000 - 65.000; Jornada completa

Descripción de la vacante

A technology-driven security company is seeking a Senior Frontend Engineer based in Spain to develop AI-driven interfaces for an advanced security platform. You will work using React, TypeScript, and Redux Toolkit, collaborating with cross-functional teams. This permanent role offers competitive salary and remote-first work arrangements.

Servicios

Competitive salary

Performance-based bonuses

Remote-first and flexible work arrangements

Access to modern tools and technology

Career growth opportunities

Formación

• 5+ years of professional experience in frontend development.
• Deep understanding of HTML5, CSS3, and TypeScript.
• Experience with Redux and complex state management.

Responsabilidades

• Build scalable frontend architecture using React, TypeScript, and Redux Toolkit.
• Develop AI-powered features including real-time chat.
• Optimize application performance.

Conocimientos

Frontend development

HTML5

CSS3

TypeScript

React

Redux Toolkit

Unit testing

RESTful API integration

Herramientas

Vitest

Sentry

Git

Docker

Descripción del empleo

About the role

We’re seeking a Senior Frontend Engineer to help build our AI-driven Zero Trust Network Access (ZTNA) platform. It provides real-time policy enforcement, secured remote access for enterprise endpoints.

You’ll design and develop AI-driven interfaces that will make the experience outstanding for end users.

Important:

• This will be a permanent employment opportunity for candidates based in Spain, Germany, and Poland.

Key Responsibilities

• Build scalable frontend architecture using React 19, TypeScript, and Redux Toolkit or similar frameworks, following our strict layered architecture

• Develop AI-powered feature,s including real‑time chat using Server‑Sent Events (SSE), message streaming, and intelligent user interactions

• Design and maintain our design system with Vanilla Extract synchronized with Figma designs

• Write clean, testable code with comprehensive unit tests using Vitest

• Collaborate cross‑functionally with Product, Design, Backend, and AI teams to define and ship features

• Optimize application performance

• Leverage AI‑assisted development with Claude Code or similar agents to accelerate feature development while adhering to our architectural patterns

• Participate in code reviews and architectural decisions

• Stay up to date with the latest front‑end technologies, frameworks, and best practices

• Ensure seamless integration with backend APIs and services

Tech Stack You'll Work With

• Core: React 19, TypeScript 5.9, Rsbuild (Rspack), Redux Toolkit 2.10, RTK Query

• UI: HeroUI (NextUI fork), Tailwind CSS 4, Vanilla Extract

• Forms: React Hook Form, Valibot

• Routing: React Router 7

• Testing: Vitest, React Testing Library

• Code Quality: Biome, SonarQube

• Monitoring: Sentry

Required Qualifications

• 5+ years of professional experience in frontend development

• Deep understanding of HTML5, CSS3, and TypeScript.

• Redux experience with Redux Toolkit, RTK Query, and complex state management

• Testing skills with unit testing frameworks (Vitest, Jest) and React Testing Library or similar

• RESTful API integration with async data handling, caching strategies, and error management

• Build tools experience with Vite, Webpack, Rsbuild, or similar modern bundlers

• Problem‑solving abilities with debugging complex React applications and performance bottlenecks

• Understanding of CI/CD pipelines and familiarity with Git workflows

• Comfortable with AI-assisted development and willing to adopt modern AI coding tools

Nice to Have

• Experience with Node.js or full‑stack JavaScript environments

• Tailwind CSS, CSS‑in‑JS (Vanilla Extract preferred)

• Biome, ESLint, or Prettier configuration and code quality tooling

• Sentry or similar monitoring tools for error tracking and performance monitoring

• Docker for containerization and deployment pipelines

• Familiarity with UI/UX design principles and Figma

• Contributions to open‑source projects or active participation in the developer community

What We Offer

• Competitive salary and performance‑based bonuses

• Remote‑first and flexible work arrangements

• Access to modern tools, technology, and professional development resources

• Inclusive, transparent, and collaborative work culture

• Opportunities for rapid career growth in a scaling technology company