Job Description

Company Description

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Moleculyst Ventures Private Limited is an AI research and engineering company focused on building reliable, autonomous, and self-improving AI systems. Our work includes LLM reasoning, hallucination detection, automated research pipelines, interpretability, formal verification, and systems that can evaluate and improve their own problem-solving procedures.

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We are particularly interested in combining contemporary language models with rigorous mathematical and computational tools. One area of our work involves integrating formal theorem provers such as Lean 4 into AI systems so that mathematical reasoning and generated proofs can be mechanically verified rather than accepted solely on the basis of model output.

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Role Description

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We are looking for a Lean 4 Programmer to work on formal theorem proving and its integration with AI systems.

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The role will involve writing and verifying formal proofs in Lean 4, working with Mathlib, understanding and manipulating proof states,



and developing infrastructure that allows AI models to generate, test, repair, and verify formal proofs.

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You will collaborate with our AI research and engineering team on systems where language models interact programmatically with Lean. Depending on experience and interests, the work may also involve tactic development, Lean metaprogramming, automated theorem proving, proof-search systems, dataset generation, and evaluation of LLM mathematical reasoning.

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This is a part-time, remote role with flexible working hours and regular online collaboration with the research team.

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Responsibilities

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- Write, debug, and maintain formal proofs in Lean 4.
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- Work extensively with Mathlib and existing Lean libraries.
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- Formalize mathematical statements and translate informal proofs into machine-checkable Lean proofs.
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- Diagnose proof failures and work effectively with Lean proof states, goals, tactics, and error messages.
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- Help bu

📌 Lean 4 programmer (Delhi)
🏢 Moleculyst
📍 Delhi