Postdoc: Keystone Project (Machine-Verified LLM Inference) — EPFL
- Location
- Lausanne
- Contract
- Full-time
- Posted
- 42 days ago
Full description
Mission
The Keystone project seeks to advance knowledge in the following domains: • Formal verification and interactive theorem proving (Rocq, Lean) • Secure and high-performance computer systems, including ML infrastructure
We seek outstanding candidates working in formal methods and/or computer systems with interests in one or more of the following areas: machine-checked verification of systems software, GPU kernel semantics and verification, and AI-assisted proof engineering.
The position is part of an ARIA-funded collaboration between EPFL and Imperial College London whose goal is to build a formally-verified ML inference engine, demonstrating that AI can help make verified systems competitive with unverified systems in terms of development effort, features, and performance.
Main duties and responsibilities
• Conducting research related to the Keystone project, including contributing to the design and construction of a machine-verified LLM inference engine. The precise focus will be discussed with the successful candidate depending on their background, expertise and affinities. Possible directions include: • Formalizing GPU kernel semantics (e.g., PTX/Triton) in a proof assistant and verifying high-performance inference kernels (numerical accuracy, memory safety, data race freedom, functional correctness) • Implementing and verifying the inference coordination layer (batching, KV-cache management, scheduling) in Rocq/Lean, with extraction to executable code • Developing agentic AI workflows for specification autoformalization, proof generation, and proof repair • Build a strong network in the fields of formal verification, systems, and ML infrastructure, including close collaboration with the Imperial College London team (regular visits to London are expected) • Contribute to open-source releases of specifications, proofs, and verified artefacts • Engage with the ARIA programme, including red/blue team exercises and sprint reviews
Profile
• PhD (or nearing completion of) in computer science or a closely related field • Background in formal verification, programming languages, systems, or ML • Research experience in one or more of: interactive theorem proving (Rocq, Lean, HOL, Isabelle, or similar), GPU programming or semantics, compilers, concurrency, or ML systems (e.g., vLLM, SGLang, or similar inference engines) • Strong computational and analytical skills, including solid software engineering ability across multiple languages (e.g., Python, C++, OCaml, functional languages) • Experience using or evaluating LLM-based tools for code or proof generation is a plus • Publication record (relative to your career stage) in internationally leading journals and conferences • Independent, creative, and solution-oriented • Excellent written and oral communication skills in English • Strong motivation to explore new research domains at the intersection of AI and formal methods • Good team spirit and enthusiasm for working in a distributed, multi-institution team
We offer
• A stimulating and international working environment • Excellent working conditions • Opportunity to perform state-of-the-art research in one of the most dynamic scientific institutions in Europe, within a high-profile ARIA-funded project • Opportunity to interact with internationally renowned experts at EPFL and Imperial College London, and with a strong team of postdoctoral researchers and PhD students • Generous access to frontier AI models and high-performance compute for proof-assistant workloads • Funded travel for collaboration between Lausanne and London, and for conferences
Informations
Only applications submitted through the online platform are considered. You are asked to supply: • A brief cover letter (pdf, up to 2 pages).
And in one PDF
• A CV with a publication list. • A research statement (pdf, up to 3 pages). • Contact details for 3 referees.
For any further information, please contact: Nate Foster ([email protected]).
More information can be found on https://laser.epfl.ch/.
Contract Start Date : 01.12.2026, or to be determined
Activity Rate : 100.00
Contract Type: CDD
Duration: 1 year, renewable (project duration permitting)
Reference: 2476
Questions about this listing
What salary does EPFL offer for this role?
The original listing does not state a salary. Our estimate for this role and sector in Lausanne is CHF 60'500 - 91'500 gross per year — an estimate, not a figure communicated by EPFL. The calculator on this site converts a gross salary into your actual net take-home once cross-border tax and social contributions are applied.
Is this a full-time role, and what type of contract does EPFL offer?
This listing is a full-time position. The contract type shown here comes directly from the employer's original posting; always confirm exact hours, notice period and probation length with EPFL during the application process, since these details can vary by role even within the same contract category.
Do I need a cross-border work permit for a role in Vaud?
EU/EFTA citizens living in an EU/EFTA state can apply for a G permit and can work anywhere in Switzerland: border zones no longer apply to them, and they must return home at least once a week. The Swiss employer files the request with Canton Vaud's migration office after the contract is signed. Processing times vary by canton, so confirm the specifics with Vaud's cantonal migration office or with HR during the application.
How do I apply for this position at EPFL?
Use the "Apply now" button on this page — it links directly to EPFL's original listing at careers.epfl.ch, so your application goes straight to the employer's own applicant-tracking system. Frontaliere Ticino does not collect or forward applications itself.
