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# Founding Rust Engineer

- **Company:** Twin Twin
- **Location:** Paris, France
- **Salary:** €200,000.0
- **Contract:** Permanent contract
- **Skills:** Systems Engineering, Compilers, Databases, Programming Tools, Distributed Systems, Web Browsers, Open Source Technology, Software Engineering, AI Infrastructure, Large Language Models, Backend
- **Published:** September 5, 2026
- **Apply:** https://startup.jobs/founding-rust-engineer-twin-labs-8324447

## About the Role

We're not looking for a "Rust developer".

We're looking for engineers who can own problems from idea to production.

You should probably have:

 * Significant production Rust experience
 * Strong systems thinking
 * Experience building and operating real products
 * High autonomy
 * Ability to navigate ambiguity
 * Interest in AI systems and LLMs
 * Curiosity across the entire stack

You may come from:

 * Infrastructure
 * Databases
 * Distributed systems
 * Developer tools
 * Browsers
 * Networking
 * Compilers
 * Runtime systems
 * AI infrastructure

What matters most is your ability to build robust systems and make good product decisions.

## Description

You will work on some of the hardest problems in autonomous agents:

 * Browser execution at scale
 * Low-latency communication between agent subsystems
 * Reliable orchestration of long-running workflows
 * Memory systems that improve over time
 * Self-healing execution architectures
 * Agent infrastructure that survives failures
 * Product features used directly by customers
 * Internal systems that AI coding agents can understand, operate and extend

Part of the challenge is not simply writing software.

The challenge is designing systems that remain understandable and modifiable by AI coding agents themselves. The way we build software internally increasingly assumes that both humans and coding agents will interact with the codebase., The engineers who thrive at Twin usually:

 * Ship fast
 * Take ownership without waiting for permission
 * Care deeply about product outcomes
 * Prefer building over discussing
 * Enjoy working close to users
 * Can move between infrastructure and product work

Many of the strongest engineers we know have backgrounds as founders, open-source maintainers, systems engineers, or product-minded infrastructure builders.

What won't work

This role is probably not for you if:

 * You need detailed specifications before starting
 * You prefer working on isolated technical components
 * You only want to work on backend infrastructure
 * You are uncomfortable making product decisions
 * You dislike ambiguity
 * You expect large-company processes

Examples of backgrounds we find exciting

 * Engineers who built widely-used open-source infrastructure
 * Early engineers from highly technical startups
 * Systems engineers who became product builders
 * Founders who built technical products from scratch
 * Developers who combine deep technical expertise with strong product intuition


## Related Videos

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- [Rust in the Real World: Adoption, Migration, and Tradeoffs](https://www.wearedevelopers.com/videos/100147-rust-in-the-real-world-adoption-migration-and-tradeoffs)

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