Founding Rust Engineer

Twin Labs·Senior·Remote · Hybrid · Paris·$200k–$250k EUR

Posted Oct 4, 2026

Twin Labs

Founding Rust Engineer

Location: Remote / Hybrid (Paris or Remote - Europe) Employment Type: Full time Department: Engineering

Compensation

Package €200K – €250K • Offers Equity

About Twin

Twin is building fully autonomous AI agents that run real business operations. You give a goal. Twin figures out the steps. It executes them end-to-end through APIs when they exist and through the browser when they don't.

In the first months of beta, users have already deployed more than 100,000 agents running lead generation, customer support, operations, trading systems, e-commerce workflows, reporting, and entire service businesses.

Twin was founded by Hugo Mercier, CEO (founder of Dreem, $60M raised, 150+ employees, acquired) and João Justi, CTO (cryptography, compilers, virtual machines, distributed systems, ex-Zama) but also Julius de Bruijn, creator of Tiberius (3.3M downloads) and Patrick Tourniaire.

We raised a $10M seed round led by LocalGlobe and are building with a small team of senior engineers.

Why join Twin?

Work on one of the hardest problems in software: making AI agents reliable enough to run real businesses.
Build from first principles: many of the core abstractions don't exist yet.
Small team, massive ownership: your decisions directly shape the product, architecture, and company.
Rust at the core, product at the center: not infrastructure for infrastructure's sake.
Design systems for both humans and AI agents: a new software paradigm that barely exists today.
Early enough to matter: every engineer has outsized impact on what Twin becomes.

What you'll work on

Most AI companies are focused on generating text or code. We are focused on making AI systems reliably execute real work.

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

What we're looking for

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

Twin Labs