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 in e-commerce, marketplaces, or scaling startups. Benefits Why SOUS? • Competitive Salary + Equity: €95k + options—you’ll grow with us. • Shape the Future: Your contributions will define what SOUS becomes. • Flexibility: While we’re primarily on-site, we value flexibility when it makes sense. • Passion-Driven Team: Join a group of foodies and techies who love solving big problems. • High Impact: Be part of a mission that’s changing the way F&B creators succeed. What to Expect in the Hiring Process: • A 30-minute intro call to get to know each other. • A 60-minute technical deep dive. • An technical assessment at our offices in Amsterdam. • A 30-minute cultural alignment chat to see if we’re a ma