Frontend Engineer

• Play a central role in the migration of our legacy frontend to React — defining patterns, setting standards, and building incrementally without breaking what's live.
• Design and evolve a scalable frontend architecture — component systems, state management, performance patterns, testing strategy — built to grow with the product.
• Work closely with Product and Design to implement omnichannel UI experiences across voice, chat, email, and other digital channels.
• Define and enforce frontend engineering standards — code quality, accessibility, performance, and maintainability.
• Mentor other engineers on React best practices and frontend architecture decisions.
• Contribute to backend development when required — using Node.js and Nest.js — whether that's building APIs, fixing issues, or unblocking the team.
• Actively contribute to technical discussions, challenge scope, and propose better approaches when you see them.
• Help the team move faster by reducing friction — better tooling, cleaner abstractions, clearer patterns.

Software Engineer, ReactJS, TypeScript

• Scale the mobile app architecture to support growing user demand
• Accelerate app release cadence by improving and owning the release process
• Build reusable patterns, tooling, and documentation for mobile app contribution
• Support debugging and feature delivery for teams across Mollie
• Own and evolve the Mollie UI design system for consistency and quality
• Rebuild and improve mobile navigation architecture
• Improve app accessibility in line with compliance standards
• Strengthen testing practices and automation to raise reliability

UI Engineer II

• Join a growing team working on a long-term project for a Belgian Telecommunications client
• You'll be integrated into a full delivery team working for a Telco client in Belgium, contributing to fullstack development across web applications and backend services
• Engage with complex customer questions and feature requests, not just implement tickets

Fullstack Developer – TypeScript/React, Vue.js

• Work alongside our Tech team on active Node.js and React projects.
• Contribute to the design, development, and maintenance of scalable web applications.
• Collaborate closely with engineers, product and QA.

Software Developer – NodeJs, ReactJs

• Lead frontend architecture and define how features are built, tested, and deployed
• Make key technical decisions around performance, rendering strategies, and API integration
• Establish reusable patterns for components, state management, forms, and authentication
• Monitor and debug production systems, ensuring reliability and security
• Mentor engineers and conduct code reviews
• Collaborate cross-functionally with backend, security, DevOps, QA, and product teams

Senior Front-end Engineer

• Develop and maintain front-end applications using React.js
• Ensure code quality through best practices, testing, and performance optimization
• Collaborate with backend teams to integrate APIs and services
• Participate in agile development processes, including sprint planning and code reviews
• Troubleshoot and resolve technical issues in a timely manner
• Stay up to date with the latest React.js trends and ecosystem updates
• Lead architectural frontend decisions and mentor junior/mid-level engineers within the team

React Developer

• Working closely with a tightly knit engineering organization to design, deliver, and improve technical solutions that delight our customers
• Develop and implement automated unit and integration tests to validate software functionality, performance, and robustness.
• Stay up-to-date with the latest industry trends and advancements in front-end development
• Use Continuous Integration and Continuous Deployment (CI/CD) practices during the development process, ensuring frequent and reliable software releases.
• Influencing, implementing and discussing new designs, architectures, standards and best practices for large-scale distributed systems

Senior Frontend Engineer

• Integrate into client teams to deliver high-quality solutions
• Collaborate directly with stakeholders to design and implement robust systems
• Design, develop, and maintain modern web applications using a tech stack centered around C# and React

Full-stack Engineer, C# – React

• Design and implementation of high-load microservices using TypeScript.
• Design of data pipelines and data storage systems.
• Working with queues and asynchronous tasks.
• Writing unit and integration tests.
• Performance and resource consumption optimization.
• Participation in architectural decision-making.
• Production system support.

Senior TypeScript Developer

• Build & Own: Take full ownership of designing, developing, and deploying scalable front-end and back-end web applications with Spring Boot and Angular in a cloud-native environment.
• Collaborate & Mentor: Work with product, designers, security, and fellow engineers to solve key challenges, strengthening the team through code reviews and knowledge sharing.
• Learn & Improve: Embrace continuous learning and self-improvement. Apply new technologies and ideas to evolve our platform, processes, and engineering culture.

Frontend Engineer jobs in Portugal

See all jobs on JobTailor