Backend Developer (Node.js, NestJS) - Spain Based

At UNITH, we’re transforming the world of conversational AI. Our "Digital Humans" technology revolutionizes customer interactions with immersive, multilingual AI assistants. With cutting-edge innovation spanning 60+ languages and 600 voices, we’re proud to be an ASX-listed leader helping businesses connect with their audiences like never before.

Why Join Us?

Imagine working with a team of talented people from different countries and backgrounds. At UNITH, we’re all about teamwork, creativity, and supporting each other to grow. This year, as we expand quickly, you’ll have the chance to develop your skills, take on responsibility, and make a real difference.

We care about more than just technical skills—we’re looking for people who are excited about what they do and who bring their unique ideas and personality to the team.

The Role: Mid-weight Back-end Engineer

Join our tech team to design and build scalable backend systems that power our groundbreaking products. You’ll work closely with Full Stack Engineers, our Head of AI and Platform Engineering, and Product Owners to shape the technical direction of our solutions while focusing on scalability, performance, and innovation.

What You’ll Do

• Build and maintain scalable backend services.
• Collaborate with cross-functional teams to design and implement features.
• Solve complex technical challenges that drive high business impact.
• Contribute to system architecture decisions and conduct code reviews.
• Optimize CI/CD pipelines and deployment processes.

Our Tech Stack

• Cloud: AWS EC2
• Frameworks: NestJS, FastAPI
• Languages: Typescript, Javascript, Python
• Databases: Postgres, NoSQL
• Frontend: Svelte, React
• Containerization: Docker
• AI/ML: Python, PyTorch, TensorFlow
• Message Broker: RabbitMQ (nice-to-have)

What We’re Looking For

• 3+ years of hands-on experience with NestJS and related technologies.
• Strong problem-solving abilities and effective communication skills.
• Expertise in database design, management, and optimization.
• Proven track record of delivering scalable solutions.
• Proficiency with Git workflows and CI/CD pipelines.
• Experience building API-driven architectures and microservices.

Bonus Points For

• Passion for scalable systems and developer tools.
• Familiarity with automating software delivery pipelines.
• Interest in machine learning and AI technologies.
• Public project repositories (e.g., GitHub/Bitbucket).
• Experience with containerization (e.g., Docker, Kubernetes).
• Open-source contributions.

What We Offer

• Competitive Compensation: Including salary and Performance Right Shares.
• Flexibility: Work remotely or join us occasionally at our beautiful Barcelona office with a rooftop terrace.
• Well-being: Private health insurance with Alan and a ClassPass discount to support your fitness and wellness goals.
• Global Culture: Join a diverse, international team where your ideas and voice matter.
• Fun & Connection: Enjoy in-person team events.

Ready to Join Us?

If this role excites you, we’d love to hear from you! Please send your resume and a brief message about why you’re the perfect fit to anniek@unith.ai. Let’s shape the future of conversational AI together!

Meet Digital Anniek!

Want to learn more about this role? Meet Digital Anniek, our friendly AI-powered assistant, who’ll walk you through the position and our company culture. (https://chat.unith.ai/anniek_unith-92/anniek-9364?api_key=6450400c1c7c4f5bbf4f0ee8b19f1856)

Diversity & Inclusion

At UNITH, we believe diversity drives innovation. Our mission to transform customer experiences relies on a team with a wide range of perspectives, experiences, and backgrounds. We are committed to creating an inclusive workplace where everyone feels valued and empowered to thrive.