Careers at Ephemera

We’re building XMTP — the open, secure messaging protocol designed to last as long as the internet itself.

Our mission: increase the world’s freedom to communicate.

That means solving problems most people would never attempt. Problems at the edge of what’s possible.

The Challenges We’re Tackling

• The most secure messaging standards in the world. From MLS (Messaging Layer Security) to quantum-resistant cryptography, we’re building for a future where communication stays safe for decades.

• A messaging economy. Incentives that reward reliability, punish censorship, and sustain a global network without gatekeepers.

• Ecosystem coordination at scale. Thousands of apps, wallets, agents, and developers building on the same rails—and all of it has to interoperate seamlessly.

• Open source, by default. Every line of code, every roadmap, every mistake—published for the world to see. Because trust must be earned, not claimed.

• Designing for permanence. Building a protocol intended to last as long as the internet itself—resilient, permissionless, unstoppable.

These aren’t just technical puzzles. They’re civilization-scale problems. And if we get them right, the payoff is immense: communication that no one can take away, owned by everyone, sustained forever.

Who We’re Looking For

Missionaries, not mercenaries. Builders who want to devote themselves to work that actually matters. Engineers who want to solve the hardest problems in security, cryptography, distributed systems, and incentives—and see their solutions run in the wild. Designers who want to define new interaction patterns that feel inevitable ten years from now. Operators who thrive in the unknown and make order from chaos.

To learn more about what it's like to work at Ephemera, read our values & rituals doc here.

We’re a small, focused team. Fully remote. Headquartered on the internet. Competitive salaries, meaningful ownership, and benefits designed to give you autonomy.

This is not the place for dabblers. It’s for those who want to do the best work of their lives, alongside others doing the same.

Open Roles: