Jobs in Besancon, France

The Flex is on a mission to transform the rental sector globally. We believe that renting a home should be as easy as buying an item from Amazon—giving tenants the ability to rent anywhere in the world effortlessly, and giving landlords simple, hassle-free property management without excessive fees.

We are building a small, dynamic team of A-Players who are committed to growth and ready to scale The Flex into a global powerhouse. We reward ambition, promote from within, and create an environment where talent thrives.

As a Full Stack Engineer at The Flex, you will be responsible for designing, developing, and maintaining end-to-end digital solutions that power our operations and customer experiences. You will work across the full stack—front-end, back-end, and cloud infrastructure—bringing ideas from concept to production.

This role is ideal for someone who thrives in a fast-paced, startup environment, takes ownership of projects, and is passionate about building scalable, high-quality software that solves real-world problems.

• Full-Stack Development – Design, develop, and maintain scalable web applications using Node.js, React, and related modern frameworks.
• Cloud Deployment & Infrastructure – Deploy, scale, and manage applications on AWS Cloud, leveraging serverless architecture.
• API Development – Design, build, and optimize RESTful APIs (FastAPI and/or Node.js) to support core business functionality.
• Automation & Tooling – Build tools and scripts to streamline workflows and improve development efficiency.
• Testing & Code Quality – Implement CI/CD pipelines, write automated tests, conduct code reviews, and maintain high coding standards.
• Troubleshooting & Debugging – Investigate and resolve production issues quickly and effectively.
• Collaboration – Work closely with product, operations, and design teams to deliver impactful features.

• Strong proficiency in Node.js, React, and AWS Cloud.
• Experience with serverless applications and cloud-native infrastructure.
• Solid understanding of REST API design and integration.
• Familiarity with FastAPI and Python is a plus.
• Understanding of modern development practices: CI/CD, automated testing, Git workflows.
• Strong problem-solving skills and the ability to learn quickly.
• Excellent communication and teamwork skills.
• Self-motivated, adaptable, and proactive in finding solutions.

• Be part of an innovative, fast-growing company revolutionizing the real estate industry.
• Opportunity to build and shape the tech stack from the ground up.
• Competitive salary + performance-based incentives.
• Work remotely with a high degree of autonomy.
• A genuine chance to grow professionally and personally in a hands-on, entrepreneurial role.

• You are looking for a traditional corporate 9-to-5 job.
• You prefer office politics and gossip over problem-solving.
• You want a slow, predictable, dead-end role.
• You do not aim to be world-class at what you do.

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