Senior UI / Frontend Engineer - Portugal

Velenosi&Meredith; Oeiras; Hybrid; EUR 50,000 - 65,000; Full time

Job summary

Velenosi&Meredith is seeking a hands‑on Senior UI / Frontend Engineer to build high‑quality React frontends for our robotics software platform in Portugal. The role is ~80% hands‑on, with close collaboration to the Frontend Architect and other engineering teams.

You will translate architectural concepts into production‑grade React/TypeScript code, ensuring performance, security, and scalable UI patterns while mentoring junior developers.

Qualifications

• Proven React/TypeScript development experience.
• Ability to transform large datasets into real‑time KPI visualizations.
• Strong knowledge of HTML5, CSS3, responsive design and modern tooling.
• Experience writing automated frontend tests and working in containerized environments (Docker).
• Collaborative mindset with ability to mentor juniors and work with cross‑functional teams.

Responsibilities

• Implement Modern Frontends: build complex workflows, dashboards, real‑time views for an AMR platform.
• Write Production‑Ready Code: scalable, performant React/TypeScript components.
• Connect Complex Systems: integrate REST APIs with robust data flows and permissions.
• Drive Engineering Quality: unit/integration/E2E tests and PR discipline.
• Mentor teammates and collaborate with Frontend Architect, Backend, DevOps, Robotics teams.

Skills

React & TypeScript

Data‑driven UI

HTML5/CSS3

Testing & CI/CD

REST API integration

Tools

Docker

Playwright

Cypress

Jest

Vitest

Job description

Senior UI / Frontend Engineer (React)

Location: Tagus Park, Portugal

Work Model: Hybrid – 3 days on-site

Contract: Full-time

Salary: €50,000–€65,000 gross/year × 14 salaries

Relocation: No relocation support provided (Only EU citizens, locals, or candidates with valid Portuguese residency will be considered)

About the Role

We are looking for a hands‑on Senior UI / Frontend Engineer to implement high-quality, modern frontends for our robotics software platform. Working closely with our Frontend Architect, you will turn architectural concepts into production‑grade React software. This is a ~80% hands‑on development role. We need a strong product engineer who loves writing clean, reusable code every day and wants to stay on a technical track rather than moving into pure architecture, design, or people management.

What You'll Do

• Implement Modern Frontends: Build complex workflows, interactive dashboards, and real‑time operational views for an Autonomous Mobile Robot (AMR) platform.
• Write Production‑Ready Code: Translate architectural choices into highly scalable, performant React and TypeScript components.
• Connect Complex Systems: Integrate REST APIs seamlessly, handling asynchronous data flows, edge cases, error states, and strict user permissions.
• Drive Engineering Quality: Embed unit, integration, and E2E testing directly into your daily workflow while maintaining pull request discipline and secure coding practices.
• Collaborate & Mentor: Work side‑by‑side with our Frontend Architect, Backend, DevOps, and Robotics teams while mentoring junior developers via code reviews.

What You’ll Need

• Expert React & TypeScript Skills: Deep, practical experience building complex web applications (not just landing pages, prototypes, or simple CRUD forms).
• Data‑Driven UI Expertise: Proven ability to transform large, dense, and complex datasets into intuitive, real‑time KPI visualizations and executive dashboards.
• Modern Development Stack: Mastery of HTML5, CSS3, adaptive styling, responsive design, modern build tools, package managers, and Git workflows.
• Testing & CI/CD Discipline: Solid experience with automated frontend testing frameworks and working inside containerized (Docker) development environments.
• Pragmatic Problem‑Solving: A collaborative mindset to challenge or clarify frontend architectures constructively and execute them quickly.

Nice‑to‑Have (Differentiators)

• Experience with state management and data fetching libraries (e.g., React Query, Redux Toolkit, Zustand, TanStack ecosystem).
• Hands‑on testing experience with tools like Playwright, Cypress, Jest, Vitest, or Testing Library.
• Data visualization experience using frameworks like D3.js, Recharts, Nivo, ECharts, or AG Grid Enterprise.
• Background in robotics, IoT, industrial automation, manufacturing, or multi‑tenant SaaS cloud platforms.
• Familiarity with Figma collaboration workflows and accessibility standards (WCAG).