Senior Software Engineer (Python)
Merlin Digital Partner · Barcelona, Spain · Hybrid
Posted Aug 17, 2026
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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…