Senior Full-Stack Product Engineer (Startup, SaaS, Amsterdam)

Over 2 million food & beverage (F&B) businesses operate in the EU. 60% face failure within their first year 80% in five years. SOUS is here to change that. We’re building a platform that empowers independent F&B creators to thrive - unlocking new revenue streams, cutting costs, and scaling online growth with ease. From e-commerce to delivery management to building loyal communities, we’re reimagining how independent F&B brands grow in a digital-first world. In just two years, we’ve scaled rapidly, onboarded top talent, and brought in over €8M in sales for our clients. Now, we’re evolving - transitioning to a SaaS-first model that will shape the future of the €100B independent F&B market. To make this vision a reality, we’re searching for a Senior Full-Stack Product Engineer who’s as excited about building great products as they are about leading a team. If you’re ready to roll up your sleeves, write brilliant code, and influence the technical direction of a high-growth startup, we’d love to meet you. Tasks Code, Build, and Ship (70%-80% of your time): Develop and refine our core backend (Django) and frontend (React + TypeScript). Create and improve APIs for users, orders, shipping, and partner tools. Build smart integrations with tools like Shopify and Mendrix. Scale and optimize cloud hosting on GCP (and AWS in the future). Ensure our stack is clean, scalable, and future-proof. Product Engineering (20%-30% of your time): Architect and scale multi-tenant SaaS solutions for the next phase of SOUS. Collaborate with product, design, and operations teams to align technical plans with business goals. Set the bar for code quality, testing (TDD/BDD), and CI/CD workflows. Mentor developers to help them grow while creating a culture of engineering excellence. Identify opportunities to innovate and improve. Requirements Hands-On Experience: You’ve been in the trenches as a full-stack developer for 10+ years, and you’re fluent in Python (Django) and JavaScript/TypeScript (React). You’ve built and scaled SaaS applications that are battle-tested in production. Your database game is strong - PostgreSQL and ORMs are second nature to you . Leadership in Action: You’ve led teams, balancing writing code with mentoring and decision-making. You can architect systems that are both elegant and robust while keeping your hands dirty in the codebase. Smart Development Practices: Testing isn’t just a buzzword for you - it’s how you build (Pytest, React Testing Library). You’re fluent in Git workflows and CI/CD tools (e.g., Bitbucket Pipelines). API experience: Deep experience in building and integrating APIs—whether it’s RESTful APIs, JWT Auth, or third-party tools like Shopify and Mendrix. Frontend Know-How: Modern frameworks (React, MUI) are where you shine. You know how to make frontends fast, responsive, and delightful. Bonus Points For: Experience with Firebase (Auth, Hosting) or Google Analytics. Building SaaS platforms and multi-tenant architectures. A background i