Principal Software Engineer

What we do in life echoes in eternity.”

If you’re looking for meaningful work, real influence, and the opportunity to become a key part of an ambitious startup, Deune is the place for you.

Deune is an AI cybersecurity startup with a proprietary approach to vulnerability discovery, making systems more secure, controlled, and verifiable. We’ve raised our friends and family round, have three patents pending, and are now building our core team.

When you’re building something serious, you want people you trust beside you.

We’re looking for an exceptional Senior-Principal Level Software Engineer to join as an early member of our team.

We’re looking for someone with deep hands-on experience building and architecting complex production systems, with strong expertise across cloud infrastructure, distributed systems, AI and agentic systems, and cybersecurity.

The role will involve designing and building core production infrastructure, developing scalable AI and agent orchestration systems, integrating models and security research pipelines, and taking technically challenging systems from architecture through deployment and operation in the cloud.

You’ll work across the stack from backend and distributed infrastructure to AI systems, security tooling, APIs, data pipelines, observability, performance, and production reliability.

We’re looking for someone who can both lead technical architecture and build hands-on, make strong engineering decisions independently, and take ownership of critical systems from idea to production.

This isn’t just another engineering job. It’s an opportunity to shape the technology, influence the company’s direction, play a meaningful role from the earliest stage, and have the greatest opportunity to benefit from the ESOP and the long-term value we create together.

If you want to build something meaningful, solve difficult technical problems, take real ownership, and join a startup where your voice will truly matter, apply or DM us.

And if this isn’t for you, but someone exceptional comes to mind, please connect us.