Senior Fullstack Engineer - TypeScript & 3D Web (H/F)

Role Summary

• •Lead the design and development of a new Node.js/TypeScript backend from scratch, orchestrating data pipelines between advanced algorithms and the SaaS platform.
• •Develop and maintain critical business workflows including RBAC, document management, payments, and GDPR compliance.
• •Build a lightweight, intuitive frontend interface using React, Vue, or Next.js tailored for construction professionals.
• •Ensure scalability and reliability of infrastructure on AWS/GCP with Docker and CI/CD pipelines, including monitoring and tracing for performance bottlenecks.
• •Act as the technical backbone and potential lead of a small, expert squad, ensuring overall product coherence and quality standards.

About the Company

• •Company mission focuses on reducing carbon footprint in the building sector by enabling safer, more profitable renovation over demolition.
• •Operates in the proptech and sustainability industry, offering a SaaS 3D platform that transforms raw data into actionable models.
• •A small, expert-driven startup with a long-term vision and profitability, emphasizing impact and technical complexity.
• •Values autonomy, pragmatism, and user empathy, especially for non-technical end users like construction workers.
• •Encourages a culture of freedom and responsibility with minimal micro-management and fast decision-making processes.

What You Should Know

• •Opportunity to be the first fullstack developer in the squad, shaping the technical foundation and potentially leading the team.
• •Requires a founding engineer mindset: autonomy, documentation, and balancing quality with time-to-market.
• •Work onsite in Nantes with hybrid remote flexibility (minimum 3 days in office), collaborating closely with CEO, CTO, and domain experts.
• •Role involves handling complex technical challenges including large 3D data flows and asynchronous communication with Rust/Python engines.
• •Not suitable for those who prefer rigid specifications, extensive delegation, or lack empathy for end users needing efficient, minimal interfaces.

Key Required Skills