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:

2. A 30-minute intro call to get to know each other.

3. A 60-minute technical deep dive.

4. An technical assessment at our offices in Amsterdam.

5. A 30-minute cultural alignment chat to see if we’re a match.

Ready to make an impact? Let’s build something incredible together.