Founding Rust Engineer
Posted 450 days ago, which is unusual. The employer's own board was still carrying it when we last read it, 1 hour ago.
This is the employer's own posting, not a copy on a job board.
What we know
Is it still open?
Confirmed still open
Last checked 2d ago — checked against the employer's own applicant tracking system, which is the company answering directly.
We re-read the employer's own applicant tracking system and the posting was still there. That is the company answering directly.
How old is it?
Posted 450d ago
The date the source published, not the day we noticed it (2025-07-17). Last seen at its source 1h ago.
We have tracked this listing since 5 Oct 2026 (5 days). The employer's own board has carried it every time we have read it, most recently 1 hour ago.
Is it remote?
Remote
That is the location the employer filed this posting under. Quoted as written — we do not re-word the source's own location.
Who may apply?
Europe
No source stated where this role may be worked. This is read from the ad's own words.
What the ad says
…Remote (…) Europe…
Pay not stated
Similar roles pay $133.1k–207.2k/yr
Middle 50% of 148 listings that do state pay — Engineering · all levels · Europe · USD/year. This employer has published no salary; this is what comparable listings we hold disclose, never converted between currencies or periods. How this is calculated.
Skills named in the ad
Recognised terms only, from a fixed vocabulary — this is what CV matching compares against.
Carried by 1 source
-
Ashby employer's own board first seen 5d ago · last seen 1h ago
- location not stated
The listing
Paris or Remote (Europe)
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.
This is not another chatbot.
This is not another workflow builder.
We are building systems that can operate companies.
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
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.
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
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.
What tends to work well here
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
Compensation
Package 200 - 250 K
We're building for the long term and want people who think like owners.
Last words
The software industry spent the last decade building SaaS.
The next decade will be about autonomous companies.
We believe AI agents will not just assist people.
They will operate businesses.
If that future sounds inevitable to you, we'd love to talk.