Senior Software Engineer

About Us

At Macadam, we’re on a mission to make the world a little healthier, one step at a time. Our fast-growing mobile app has already inspired more than 11 million users to turn their daily movement into real-world rewards. By combining behavioral science, gamification, and positive reinforcement, we’re redefining how people engage with their well-being.

We’re building a scalable, data-driven platform designed to grow with our global community. Our backend, powered by NestJS (TypeScript) and deployed on Google Cloud Platform (GCP), delivers a seamless and reliable experience through modern REST APIs that keep millions of users connected and motivated.

Role Description

We’re looking for a Senior Software engineer to join our growing team in Barcelona! This is a full-time hybrid role that offers flexibility to work partly from home while being part of an energetic, collaborative environment.

As a key member of our engineering team, you’ll design, build, and maintain the server-side logic that powers our products. You’ll work closely with front-end developers to ensure seamless integration, scalability, and outstanding performance. Your work will directly impact how millions of users experience our platform every day.

What will you do

• Design, build, and maintain efficient, reusable, and reliable backend services and APIs using NestJS/ExpressJS (TypeScript).
• Develop and optimize database schemas and queries, primarily using PostgreSQL/MySQL.
• Ensure the performance, quality, and responsiveness of applications, particularly under high-volume conditions.
• Collaborate closely with frontend developers, product managers, quality assurance, and other engineers to deliver new features and improvements.
• Deploy and manage applications on Google Cloud Platform (GCP).
• Write clean, maintainable, and well-tested code.
• Participate in code reviews and contribute to improving our engineering standards and practices.
• Troubleshoot, debug, and upgrade existing systems.
• Contribute to architectural decisions to ensure scalability and maintainability.

What will you bring

• Proven professional experience in backend software development.
• Strong proficiency in TypeScript and Node.js.
• Significant hands-on experience with the NestJS framework.
• Solid experience working with PostgreSQL databases, including schema design and query optimization.
• Demonstrable experience in building and maintaining scalable, high-volume applications.
• Experience designing and consuming RESTful APIs.
• Familiarity with version control systems, particularly Git.
• Strong problem-solving skills and attention to detail.
• Excellent communication skills in English (written and verbal).
• Bachelor's degree in Computer Science, Engineering, or a related field, or equivalent practical experience.

Preferred Qualifications

• Experience with Google Cloud Platform (GCP) services (e.g., Cloud Run, Cloud SQL, Pub/Sub).
• Experience with CI/CD pipelines and practices.
• Experience with other database technologies (e.g., Redis).
• Familiarity with containerization technologies (Docker).
• Experience working in an Agile development environment.

What we Offer

• Competitive salary
• Meal voucher
• Wellness allowance with our partner Urban Sports
• Private healthcare provided by Alan
• Remote-friendly work culture
• Work Abroad Program
• Opportunity to make a meaningful impact on the health and wellness of millions worldwide
• Dynamic, international, and passionate environment

If you’re passionate about products that blend impact, innovation, and scale, Macadam is where your work will genuinely make people move and feel good doing it.