Senior Software Engineer (Tech Lead) - SaaS Startup, 80-100%

A full stack engineering role with technical leadership and architecture ownership at an early-stage SaaS startup – remote across Europe. **Do you want to build the core platform that enables early-stage building design to be optimized through simulation and AI?** At **vyzn**, an ETH spin-off, we’re building a **data- and AI-driven SaaS platform** that shapes the future of construction planning. In just a few clicks, developers, planners, and architects receive precise insights on emissions, energy, comfort, and costs - based on automatically refined 3D building models - along with AI-powered recommendations to support well-informed decisions. As an **Engineering Lead (80–100%)**, you’ll take ownership of the technical foundation of our platform and lead a small, high-caliber engineering team (3–6 people), with the opportunity to expand and shape the team as we grow. You’ll be deeply hands-on in the codebase while shaping architecture, scaling systems, and helping steer how our product evolves. You enjoy balancing speed, pragmatism, and engineering quality. This role includes significant technical ownership and long-term upside through our ESOP program. * Lead the **technical development** of our SaaS platform - from concept to deployment. Our stack is a modern **Angular frontend** paired with a scalable **Nx-powered NestJS microservices** backend, running on **TypeScript** end-to-end, with **MySQL, Redis/BullMQ** for async workloads, and fully containerized via **Docker**. * **Shape and evolve the software architecture** to ensure scalability, performance, and maintainability as we grow the company and enter new markets. * **Build and inspire** a world-class engineering culture. Mentor the development team (3–6 developers), fostering clean code, knowledge sharing, and best practices * **Collaborate closely with product and design** to translate user needs into technical solutions * Coordinate technical priorities with the CTO and founders * Oversee code reviews, testing, and deployment pipelines * **5+ years of experience** in software development, ideally in SaaS, data, or AI-driven platforms * Strong skills in **TypeScript/Angular, Node.js**, and cloud-based architectures (**Azure or AWS**) * **Proven experience** in leading small engineering teams or **mentoring developers** * A structured, pragmatic mindset — you know when to build fast and when to build for the long term * Excellent communication skills in **English**; German is a plus * Based in **Europe** (hybrid or remote with occasional workshops) **Bonus** * Interest in architecture, BIM, and sustainability in the built environment * Several members of our tech team are based in Egypt. Experience collaborating with teams across the MENA region, or familiarity with the culture is a plus * **Flexibility**: Hybrid and remote work options to fit your lifestyle. * **Growth**: Work on ambitious technical challenges that accelerate your professional and personal growth as we roll-out our platform in new markets. * **A-Player Team**: Work alongside researchers, founders, and industry experts. * **Impact:** Redefine how buildings are planned and optimized, enabling a more sustainable, affordable and livable future * **Builder Culture:** High autonomy, low bureaucracy, fast decisions. * **Innovation at the Intersection of AI and Construction:** Be part of groundbreaking platform innovation that combines cutting-edge technology with sustainable building solutions. * **Long-Term Potential:** Join a dynamic, growing startup with flat hierarchies, high ownership, and the opportunity for long-term collaboration, including participation in our ESOP program. If you want to build technology that fundamentally changes how buildings are designed, we’d love to hear from you!