We are Merlin Digital Partner A leading IT and Digital headhunting company who stands out from the crowd, boasting over a decade of experience. We've successfully collaborated and played a pivotal role in the growth of industry heavyweights such as Wallapop, Glovo, Banc Sabadell, and Duracell, among others.

Our emphasis lies in people-centric approaches and optimizing the selection processes . Our mission is to revolutionize companies by seamlessly integrating top-tier talent . What sets us apart is our in-depth understanding of each partner (being their best influencer), addressing not only their needs but also capturing their essence.

Our partner is a fast-growing HealthTech company developing connected technologies at the intersection of hardware, embedded systems, IoT, AI and digital health . Their technology transforms everyday environments into intelligent health platforms, enabling seamless and continuous health monitoring.

We are currently looking for a Senior Software Engineer (Python) to join their Engineering team and help build the embedded technologies powering the next generation of connected health products.

Mission:

As a Senior Software Engineer , your mission will be to design and develop the backend systems, cloud infrastructure and APIs powering the company's connected technologies.

You will have a key role in building scalable, reliable and secure software that connects devices, AI-driven services and customer-facing applications.

Working closely with Product, AI, Embedded and Frontend teams , you will take ownership of solutions from architecture and implementation through deployment and production, helping define the technical foundations of the platform as the company scales.

The Role:

You will be responsible for:

- Designing, developing and maintaining scalable backend services , primarily using Python .

- Building and evolving REST APIs powering web,



mobile and IoT applications.

- Designing and optimizing databases, data models and system integrations .

- Developing cloud-native services with a strong focus on reliability, performance and scalability.

- Contributing to cloud infrastructure, deployment pipelines and system monitoring .

- Improving platform performance, observability and security .

- Troubleshooting production issues and continuously improving system reliability .

- Collaborating closely with Product, AI, Embedded and Frontend teams to design and deliver new product capabilities.

- Participating in software architecture and technical design decisions .

- Building clean, maintainable and well-tested software following strong engineering practices.

- Improving development workflows, CI/CD pipelines and code quality .

- Providing technical guidance and mentoring other engineers through code reviews and knowledge sharing .

- Continuously evaluating new technologies, tools and engineering best practices.

What we need:

- 5+ years of professional backend software engineering experience . More extensive senior-level experience will be highly valued.

- Strong professional development experience with Python .

- Experience working with modern Python backend frameworks such as FastAPI, Django or similar .

- Solid experience designing, developing and maintaining REST APIs .

- Experience designing scalable software architectures and contributing to architectural decisions.

- Strong knowledge of SQL and PostgreSQL , including database and data model design.

- Experience working with Firebase .

- Experience deploying and operating applications on cloud platforms such as GCP, Hetzner or similar .

- Hands-on experience with Docker, Git and CI/CD pipelines .

- Experience with monitoring, observability and background processing tools , such as Sentry, Celery or similar .

- Strong understanding of software engineering best practices, includi

📌 Senior Software Engineer (Barcelona)
🏢 Merlin Digital Partner
📍 Barcelona