Full-Stack Developer (Web + Mobile)

We are looking for a talented full-stack developer who can build across our entire stack: React Native mobile app, web frontend, and backend. You'll own features from idea to production. No hand-holding, no waiting for specs. If you've shipped real products, can learn quickly, and get genuinely excited about utilizing AI, keep reading.

About Mindsera

Mindsera is the world’s most advanced AI-powered journal for smarter insights. We help people think better by combining AI with journaling to create a smarter, more insightful self-reflection experience.

We're a small, independent team. Since launching in 2023:

• 60k+ users journaling with us
• 100M+ words written
• Featured in Forbes, The New Yorker, a16z, and more

Things we care about

Human-first AI. Most AI tools try to think for you. We use AI to help you think better. Your thoughts stay yours. We just help you see them more clearly.

Small team, big output. We're not building a Navy. We're building Seal Team 6. Everyone here ships real work that users actually see.

Excellence. Small details matter. We question everything. We design backwards from the best possible experience, not from what's standard.

Genuine impact. We want to help people live better lives.

The role

This is a true full-stack role. You'll build backend logic, web UI, React Native mobile, and AI integrations. If you only want to work on one layer, this isn't the role.

What you'll do:

• Own features end-to-end, from idea to production
• Ship weekly, sometimes daily
• Build AI features with LLM integrations and prompt engineering
• Refactor, optimize, and fix bugs across the stack
• Talk to users and dig into support to understand what's actually needed

Who we're looking for

Sharp and fast. You pick up new tools and concepts quickly. When something breaks, you figure it out. When requirements are vague, you fill in the gaps with good judgment.

AI-native. You use AI tools daily. You've built with LLMs. You have opinions about prompting, context windows, and model selection.

Owners, not task-takers. You don't wait for detailed specs. You understand problems, propose solutions, and ship.

Builders at heart. You'd be coding even if no one paid you. You have side projects.

Requirements

• Full-stack experience: backend (Node, Python, or similar) + frontend (React) + mobile (React Native or willing to learn fast)
• You've built and shipped something from scratch. A side project, a startup, a feature you owned completely.
• Experience integrating AI into products (not just using ChatGPT)

Nice to have

• Interest in psychology, mental health, or personal development
• Eye for good design and basic Figma skills
• Experience at early-stage startups

Details

• Remote (EU timezone preferred)
• Part-time to start, full-time based on fit
• Pay based on experience