Jobs in Lisbon, Portugal

About the role

As a Frontend Engineer at Sensor Tower, you will not only build features, you will define how we build them. You will take ownership of major technical components, ensuring our applications are scalable, maintainable, and fast. In our lean and flat organization, your voice will shape the technical direction of our product, helping us deliver an intuitive, fluid user experience that helps our customers understand the digital ecosystem. https://sensortower.com/blog/how-we-scaled-to-thousands-of-sidekiq-workers

What you'll bring

• 4+ years of software engineering experience with a deep specialization in modern JavaScript, TypeScript, and React.
• Proven ability to architect complex state management.
• While our stack relies on TanStack Query, React Router and Zustand, we value engineers who understand the principles and can adapt expertise from other libraries like Redux, MobX, NextJS.
• ​​You can design systems that handle complexity without becoming complicated, prioritizing long-term maintainability.
• Experience elevating the skills of peers.
• You don't just review their code
• you teach patterns and best practices.
• Competence in writing robust and efficient unit and integration tests using frameworks like Jest or Playwright.
• Deep understanding of web performance, browser internals, and optimization techniques for data-heavy applications.
• A "Product Owner" mindset.
• You care deeply about the "why" behind every feature, viewing code as a tool to solve real user problems.
• You are comfortable pushing back on requirements and proposing alternative solutions that drive better business outcomes and user experiences.