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 4-3 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.

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