Senior Full-Stack Product Engineer (Startup, vSaaS, on-site, 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.

Were building a platform that empowers independent F&B creators to thriveunlocking new revenue streams cutting costs and scaling online growth with ease. From e-commerce to delivery management to building loyal communities were reimagining how independent F&B brands grow in a digital-first world.

In just two years weve scaled rapidly onboarded top talent and brought in over 8M in sales for our clients. Now were evolvingtransitioning to a SaaS-first model that will shape the future of the 100B independent F&B market.

To make this vision a reality were searching for a Senior Full-Stack Product Engineer whos as excited about building great products as they are about leading a team. If youre ready to roll up your sleeves write brilliant code and influence the technical direction of a high-growth startup wed 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:

• Youve been in the trenches as a full-stack developer for 6 years and youre fluent in Python (Django) and JavaScript/TypeScript (React).
• Youve built and scaled SaaS applications that are battle-tested in production.
• Your database game is strongPostgreSQL and ORMs are second nature to you.

Leadership in Action:

• Youve 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 isnt just a buzzword for youits how you build (Pytest React Testing Library).
• Youre fluent in Git workflows and CI/CD tools (e.g. Bitbucket Pipelines).

API experience:

• Deep experience in building and integrating APIswhether its 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: 85k optionsyoull grow with us.
• Shape the Future: Your contributions will define what SOUS becomes.
• Flexibility: While were 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 thats changing the way F&B creators succeed.

What to Expect in the Hiring Process:

1. A 30-minute intro call to get to know each other.
2. A 60-minute technical deep dive.
3. A take-home project (with a 90-minute review session).
4. A 45-minute cultural alignment chat to see if were a match.

Ready to make an impact Lets build something incredible together.