Senior fullstack software engineer - Biotech Hardware Startup - Permanent

Salary: 60-65k fixe

We are partnering with a cutting-edge biotech startup building next-generation hardware devices powered by advanced software and AI.

The company is entering a new phase of structural reorganization. This is not a maintenance role — this is an opportunity to help redesign and scale the entire digital backbone of the company.

We are looking for a Senior Fullstack Software Engineer who has evolved in tech-driven startup or scale-up environments, ideally around hardware-enabled products (IoT, devices, robotics, audio tech, medtech, etc.).

If you thrive in fast-moving, product-centric environments and want real ownership — this role is for you.

The Opportunity

You will design, build and scale the digital architecture powering our devices and data ecosystem.

You will work at the intersection of:

• Hardware systems

• Backend architecture

• Frontend applications

• Automation layers

• AI-powered capabilities

You will collaborate closely with engineers, scientists and product designers to seamlessly connect devices, data and user interfaces.

The company is currently reshaping its tech structure — which creates strong evolution potential, including a possible Lead role in the mid-term for someone willing to step up and structure the team.

What You’ll Do

• Help to shape the technical vision of our digital ecosystem, aligning architecture decisions with long-term product and business objectives

• Architect, develop and maintain backend services and APIs in Python (FastAPI)

• Contribute to and improve our React-based frontend application

• Connect sensors, devices and automation layers to the digital ecosystem

• Integrate AI features and agentic systems into our products

• Ensure scalability, robustness and reliability of the overall infrastructure

• Participate in architectural decisions and technical direction

• Write clean, maintainable, well-documented code

• Iterate quickly in an experimental, product-driven environment

Who We’re Looking For

• 7–15 years of experience in fullstack development

• Strong expertise in Python (FastAPI or similar modern frameworks)

• Solid experience with React

• Experience working in startup or scale-up tech environments (not purely large corporate environments)

• Ideally exposure to hardware-enabled products (IoT, embedded systems, connected devices, robotics, audio tech, medtech, etc.)

• Experience with Docker and containerized environments

• Familiarity with AWS or equivalent cloud platforms

• Interest in AI APIs, automation and connected systems

• Strong problem-solving mindset and ability to work cross-functionally

• Fluent English (French is a plus)

Why Join?

• Real ownership and impact on product architecture

• Company-wide reorganization creating fast evolution opportunities

• Clear path toward a technical leadership role

• Deep-tech environment at the intersection of hardware, biotech and AI

• Small, ambitious team with strong technical standards