Senior Full-Stack Developer

About Delta Labs

Delta Labs is a University of Zurich start-up at the forefront of AI innovation. Our team combines scientific depth (PhDs in marketing, technology, and data science) with entrepreneurial experience (previous startup exits). We are pioneering

AI Twins

: intelligent persona simulations that mirror real consumer behavior. These AI-native insights are transforming how businesses understand their customers, empowering them to make faster, more precise, and more scalable decisions.

Why Join Now

We are in a rapid growth phase, building the technical backbone of an entirely new category in AI-driven customer intelligence. As one of our early senior engineering hires, you’ll have an outsized impact — not only on our product but also on the technical direction and culture of the team.

Your Role

As our Senior Full-Stack Developer, you’ll work closely with the founders and core team to design, build, and scale our platform. This is a hands-on role, but one where you’ll also help set standards, influence architecture, and shape how we grow as a team.

What You’ll Do

Build and scale features across the

frontend and backend

, ensuring usability, security, and performance.

Take ownership of key architecture decisions and contribute to the long-term scalability of the platform.

Develop and optimize

data pipelines

for structured and unstructured data.

Collaborate with data scientists, designers, and product leads to translate ideas into production-ready solutions.

Help establish engineering best practices and support future team members as we expand.

Stay ahead of emerging technologies and evaluate their potential for our product.

What You Bring

Proven experience building

modern web applications

end-to-end.

Strong proficiency in

React / NextJS

and backend development (NodeJS, PostgreSQL or similar).

Solid understanding of

software architecture, APIs, and data systems

.

Hands-on experience with cloud services (Azure, AWS, or similar).

Curiosity and excitement for AI/ML applications (direct experience is a plus).

Excellent communication skills, self-organization, and a proactive, can-do attitude.

(English fluency required; German is a plus.)

Our Culture \& Values

Remote-first, global mindset

– flexible collaboration across time zones.

Hands-on and interdisciplinary

– every team member shapes product, tech, and culture.

Curiosity and excellence

– we thrive on continuous learning.

Vision-led

– we are building the marketing AI engine of the future.

Our Current Stack

Infrastructure:

Vercel, Microsoft Azure

AI/ML:

OpenAI, Google Gemini AI

Frontend:

NextJS + React / Typescript, Shadcn + Tailwind CSS

Backend:

NodeJS / Typescript, PostgreSQL

(This is our current foundation — and you’ll help decide where we go next.)

🚀

If you are excited about joining a small, ambitious team early on and helping to build the technical foundation of a company redefining consumer intelligence, we’d love to talk.