AI Engineering Student Internship (Winter or Summer 2026)

Moonfire; Zürich; On-site; CHF 56,000 - 130,000; Full time

Job summary

Bloom is a YC-backed startup in Zurich building the first AI app builder, enabling users to craft full-stack native apps from their phones, publish to app stores, and share apps instantly. You will join as an AI Engineering Student Intern for Winter or Summer 2026, tackling real problems at the intersection of AI, code generation, and mobile creation.

You’ll work on AI systems, backend infrastructure, and tooling, with mentorship from senior engineers, and a path to full-time opportunities after

Qualifications

• Love to build — weekends, hackathons, side projects.
• High agency and curiosity; move fast and learn faster.
• Care about the experience of people trying to build apps for the first time.
• Fluent in TypeScript and comfortable across the stack.

Responsibilities

• Build and improve AI systems that can design, code, and ship complete mobile apps.
• Develop and scale backend infrastructure that powers thousands of app builds every week.
• Create beautiful, intuitive tools that make complex software creation feel effortless.
• Build internal systems, dashboards, and agents that help us move faster as a team.
• Explore new approaches to app deployment, testing, and instant sharing.

Skills

TypeScript

Full stack

Tools

React Native

Expo

Swift

Kotlin

Convex

AI SDK

Model fine-tuning

Evals

Job description

Bloom

Build and share mobile apps in seconds

AI Engineering Student Internship (Winter or Summer 2026)

$6K - $14K / monthly • Zürich, ZH, CH

Job type Internship

Role Engineering, Full stack

School year Sophomore and above

Visa US citizenship/visa not required

About the role

About Bloom

Bloom is a YC X25 startup building the first AI app builder that lets anyone build full-stack native apps directly from their phone, publish them to the App Store, and even airdrop apps to friends. We raised $3.4M from YC and angels from OpenAI, Expo, Convex, Hugging Face and more.
Our mission is to unlock the creator economy for software — making app development as easy as talking to your phone.

We’re a small, ambitious team in Zurich, working at the intersection of AI, code generation, design systems, and developer tooling.
You’ll be joining us at one of the most exciting moments in our journey — right after product-market fit is taking shape and with a ton of open technical problems to solve.

What You’ll Work On

You’ll work on real problems that sit at the intersection of AI, code generation, and mobile creation. Depending on your background and interests, you could:

• Build and improve AI systems that can design, code, and ship complete mobile apps.
• Develop and scale backend infrastructure that powers thousands of app builds every week.
• Create beautiful, intuitive tools that make complex software creation feel effortless.
• Build internal systems, dashboards, and agents that help us move faster as a team.
• Explore new approaches to app deployment, testing, and instant sharing.

You’ll ship code that thousands of builders will use every week — and see your work go live in production within days.

About You

Core Traits

• You love to build — weekends, hackathons, side projects.
• You have high agency and curiosity; you move fast and learn faster.
• You care about the experience of people trying to build apps for the first time.
• You’re fluent in TypeScript and comfortable across the stack.

Bonus Points

• Experience with React Native, Expo, Swift, Kotlin, Convex, AI SDK, Model fine-tuning, Evals
• You’ve built something cool on Bloom / are an active member of the Bloom community.

Example Open Problems

• How do we build the world’s most reliable AI coding agent?
• How can we imbue design taste into generative systems?
• How do we make AI-generated apps fast, secure, and App Store-ready?
• How can users share apps like content — instantly, with friends or coworkers?

Why intern at Bloom

• Build with a YC-backed founding team shipping daily from Zurich.
• Work on technology that’s changing how humans create software forever.
• Mentorship from the most talented engineers across YC and ETH networks.
• Potential to transition into a full-time role upon graduation.
• Location Bloom HQ is in Zurich, one of Europe’s most exciting tech hubs — home to ETH Zurich (Einstein’s alma mater), a vibrant AI startup scene, and surrounded by nature, mountains and lakes. Spend your week building awesome things for thousands of users, and spend weekends outdoors or exploring Europe!

About Bloom

Bloom is the app that builds mobile apps. We're unlocking a creator economy for software.