Description

Who is Defined.ai? Well, from a technical point of view, we leverage the power of a global crowd to provide some of the world’s biggest companies with the high-quality data they need to power their artificial intelligence. We’re instrumental to the progression and development of artificial intelligence and we couldn’t be prouder or more inspired to be involved in an industry that is changing the world.

From a personal point of view, we’re a group of big thinkers, high achievers and creative problem solvers. We bond over our shared love of software engineering, data science, and strong coffee. We like online gaming, running marathons, and team drinks. We celebrate authenticity and diversity and we’re invested in what we do. Our mission? World domination, obviously!

Who are we looking for?

We are seeking a highly skilled and experienced Frontend Developer to join our dynamic engineering team. The ideal candidate has a strong background in building scalable web applications and possesses deep, hands-on expertise with React, and also Strapi Headless CMS would be a big plus.

You will play a critical role in designing, developing, and scaling our core products. You will take ownership of our content infrastructure, leveraging Strapi to its full potential, while also contributing across our entire technology stack, from front-end interfaces to back-end services. This is a key role with significant impact on our product's architecture and future direction.

Key Responsibilities

• Front-End Development: Build responsive, accessible, and high-performance user interfaces using React (preferably React 19) and Next.js.
• Component Architecture: Develop reusable and scalable components, ensuring best practices in design and performance.
• Integration: Collaborate on API integrations (REST and GraphQL) to deliver seamless user experiences.
• Code Quality: Maintain high standards through automated testing (unit and integration), code reviews, and version control.
• Collaboration: Work in an agile environment, partnering with designers, product managers, and engineers to translate requirements into technical solutions.
• Optional Backend Contribution: Occasionally support backend development (Node.js) and/or headless CMS implementation with Strapi (considered a plus).

Required Skills & Experience

• Experience: 4+ years of professional experience in frontend development.
• React & Next.js: Strong expertise in React and Next.js, including hooks, state management, and performance optimization.
• JavaScript/TypeScript: Advanced proficiency in modern JavaScript and TypeScript.
• APIs: Solid experience consuming RESTful and/or GraphQL APIs.
• UI/UX: Knowledge of accessibility, responsiveness, and best practices for user experience.
• Git & Testing: Familiarity with Git and automated testing frameworks.
• Communication: Excellent verbal and written communication skills in English.

Nice to Have

• Experience with Strapi or other headless CMS platforms.
• Basic knowledge of Node.js for backend integration.
• Familiarity with CI/CD pipelines, Docker, or Kubernetes.
• Experience with Azure Cloud.

Benefits

You spend a lot of your time at work, so it should be challenging, fun and interesting. At Defined.ai it will be all of those things and more. Here’s what we offer:

• Flexible working schedule and hybrid model. We know comfort can boost creativity and performance, so you can manage your schedule and work both from one of our modern office spaces or home.
• Excellent career development opportunities in a high growth company. With us, you can accomplish your career goals and follow a well-described career path with the support of your supervisor.
• Culture of feedback and continuous improvement. AI is a fast-paced area, so we keep track of tech trends, and we always ask for feedback.
• An international and diverse team. We have more than 30 nationalities at our 3 locations, and we provide language classes.
• Continuous training opportunities. You can choose from many options: leveraging hand-on workshops, unlimited access to Coursera and formal development opportunities.
• We love to have fun together. We joke a lot, and we can't imagine work without fun activities – we already surfed, raced carts and played soccer together.

About Us

Defined.ai offers a platform with multiple data delivery options that leverages machine learning technology and human intelligence to deliver quality-guaranteed training data for AI systems. The platform offers self-service and fully customizable solutions that deliver high-quality project-specific training data, enabling AI products reach market quicker. It is this business model that has allowed Defined.ai to raise a total of $63.6M in funding over 4 rounds. Our value proposition is quality, privacy, speed and scale, covering more than 50 different languages. With strong expertise in speech and natural language processing technologies, we have been serving AI companies and Fortune 500 companies since day one. Defined.ai was founded in Seattle and has offices in Lisbon.

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