Summary: As a Senior Frontend Engineer, you will own the building of scalable, accessible, and high-quality user interfaces, including chat-based AI experiences. Highlights: 1. Develop chat-based user interfaces integrated with backend APIs 2. Ensure high code quality through reviews, testing, and best practices 3. Collaborate closely with designers, backend engineers, and product managers REFERRAL BONUS $1000 European Union **Work type:** Office/Remote **Technical Level:** Senior **Job Category:** Software Development **Project:** N\-iX is a global software solutions and engineering services company We are a leading European AI company developing large language models and generative platforms for enterprise and government clients. Our products combine high\-performance technologies, transparency, accessibility, and data security, fully aligned with European regulatory and ethical standards. As a Senior Frontend Engineer, you will take ownership of building scalable, accessible, and high\-quality user interfaces, including chat\-based AI experiences. You will work closely with product, design, and backend teams to deliver inclusive, reliable, and maintainable frontend systems. **Responsibilities:** Design, build, and maintain frontend applications using Vue 3, TypeScript, Pinia, and Vite Own and promote Accessibility (A11y) standards, ensuring inclusive user experiences Develop and maintain chat\-based user interfaces integrated with backend APIs Write and maintain End\-to\-End tests using Playwright Work within a Nx monorepo and contribute to frontend architecture decisions Ensure high code quality through reviews, testing, and best practices Optimize performance, scalability, and long\-term maintainability Collaborate closely with designers, backend engineers, and product managers **Requirements:** 4\+ years of professional frontend development experience (most of which should have been in a production setup with real customers) Strong expertise in Vue.js (Vue 3\) and TypeScript Proven experience implementing accessibility (A11y) standards Experience with state management (Pinia or similar) Solid experience with E2E testing (Playwright or equivalent) Strong CSS skills and experience with responsive design Experience working in monorepo environments (Nx or similar) Ability to take ownership and contribute at an architectural level **Nice to have:** Experience building chat, messaging, or real\-time interfaces Familiarity with WebSockets, SSE, or real\-time data flows Experience with AI\-powered user interfaces Experience with design systems or component libraries Knowledge of CI/CD pipelines and frontend performance optimization **Technology Stack:** **Frontend:** Vue 3, TypeScript, Pinia, ViteTesting: Playwright (E2E), unit \& integration testing **Architecture:** Nx monorepo **UI \& Styling:** Modern CSS, responsive design, accessibility\-first approach (A11y) **Integration:** REST APIs, real\-time interfaces (WebSockets / SSE – nice to have) **Tooling \& Workflow:** Git, CI/CD pipelines, code reviews, automated testing **Standards:** Accessibility (WCAG), performance optimization, maintainable frontend architecture **We offer\*:** Flexible working format \- remote, office\-based or flexible A competitive salary and good compensation package Personalized career growth Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more) Active tech communities with regular knowledge sharing Education reimbursement Memorable anniversary presents Corporate events and team buildings Other location\-specific benefits * not applicable for freelancers