11 Dec 2025
SundaeOS Ltd.
CTO / Lead Full-Stack Engineer (m/f/d)
Salary tbd
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Full-time
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Berlin
Your Profile
Must‑have
Several years of experience with Python/Django (REST APIs, Models, Migrations)
Practical experience with React & TypeScript in production use
Solid knowledge of PostgreSQL & relational database design
Confident use of Git and Docker
You enjoy translating complex processes (offers, invoices, discounts, appointments, operations) into user-friendly software
Nice to have
Experience with React Native / Expo.
Experience with AWS (ECS, RDS, S3) and possibly Terraform.
You already use AI tools in development – and know that they do not replace reviews & tests.
Your Role
We are looking for a hands-on CTO / Lead Full-Stack Engineer who:
takes technical responsibility for SundaeOS
builds features end-to-end (Backend, Web, Mobile)
further develops and maintains our architecture
reviews, improves, and structures AI-generated code
and eventually builds and leads a small engineering team
You will work directly with the founder and shape how our software functions for craft and service businesses.
What we offer
Work on a real core problem in all businesses with deskless teams: a single operating system for your team and the customers
Direct influence on product & architecture – you are not just a ticket worker, but a technology owner
Early entry opportunity with a perspective for a CTO role
Modern tools, plenty of creative freedom, and short decision-making paths
Remote-friendly setup upon agreement
About SundaeOS
SundaeOS is the operating system for businesses with deskless teams – primarily in hospitality, trades, security, retail, care, and other field operations.
We connect sales (quotes, orders, invoices) with scheduling, projects, and teams, so that businesses require less WhatsApp chaos and Excel – and get paid faster.
Our stack: Python/Django + PostgreSQL in the backend, React/TypeScript in the web frontend, and React Native for the mobile apps that are used directly on-site / with the customer. AI tools (e.g., Claude, ChatGPT) are an integral part of the development process.
How to Apply
Simply via email. Please send your application to info@sundaeos.com. We look forward to hearing from you.