Senior Software Engineer (Python)

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, including **testing, maintainability, code reviews and clean software design**.
• Excellent **debugging, analytical and problem-solving skills**.
• Ability to take ownership of technical solutions **from design and architecture through deployment and production**.
• **Professional English level**.
• **Disponibilidad para acudir a oficinas 3 días a la semana.**

**Nice to Have**

• Experience with **event-driven architectures** and technologies such as **Kafka, RabbitMQ or MQTT**.
• Experience with **Infrastructure as Code (IaC)**.
• Previous experience working with **IoT or connected devices**.
• Experience integrating **AI or Machine Learning services** into production systems.
• Experience building or operating **distributed systems**.
• Previous experience in **startups, scale-ups or fast-growing technology companies**.
• A product-oriented mindset and the ability to comfortably collaborate across different engineering disciplines.

**What we offer

**

• Join a **fast-growing HealthTech company** building a new generation of intelligent, connected health technologies.
• Work at the intersection of **embedded systems, hardware, IoT, cloud, AI and digital health**.
• Build technologies powering products already used by **leading sports organizations and enterprise customers worldwide**.
• Take ownership of **high-impact projects** , from embedded software development through system integration and production.
• Collaborate with a talented multidisciplinary team across **Hardware, Backend, AI, Data and Product**.
• Have a **visible impact on technical and architectural decisions** as the platform and engineering organization continue to evolve.
• Work in a fast-paced environment with a high level of **autonomy and ownership**.
• Strong opportunities for **professional growth and technical leadership** as the company scales internationally.
• **Competitive compensation** based on experience.