Job Overview
Location
Remote
Job Type
Full-time
Category
Software Engineering
Date Posted
June 21, 2026
Full Job Description
đź“‹ Description
- • Formally verify the highest-risk components of the Monad implementation, including concurrent and parallel execution logic, using machine-checked proofs in Rocq (formerly Coq).
- • Build and refine formal models of system designs in Rocq, then prove equivalence between these models and the production C++ implementation to catch bugs before deployment.
- • Develop specifications and weakest-precondition proofs for production C++ code using the BRiCk formal semantics of C++ and the Iris separation logic framework.
- • Strengthen theorem statements and automate proof processes to scale formal verification efforts across a rapidly evolving codebase.
- • Work on core Monad software components, including the parallel-execution EVM, custom state database, and BFT consensus client, all written in C++ and publicly available on GitHub.
- • Collaborate within a small, high-performing team of engineers and researchers to ensure correctness and reliability of decentralized infrastructure with global impact.
- • Contribute to open-source development by publishing verified code and proofs publicly, enabling ecosystem-wide transparency and adoption.
- • Apply rigorous reasoning about concurrency, memory safety, and performance to systems where “probably correct” is insufficient for production deployment.
- • Design and implement formal verification strategies that address novel Monad-specific mechanisms such as reserve balance and optimized page-level storage.
- • Maintain and improve proof automation tools and frameworks to reduce manual effort while increasing confidence in system correctness.
- • Engage with the broader blockchain and formal methods community through public blogs, papers, and talks to share advancements and learn from external research.
- • Use AI coding agents as leverage in development workflows, critically reviewing and owning all generated code before shipping.
- • Participate in shaping the company’s culture of collaboration, low ego, and high-quality output as an early team member.
- • Work on problems with massive impact in the Ethereum ecosystem, where Monad’s innovations aim to deliver unprecedented performance while maintaining EVM compatibility.
🎯 Requirements
- • At least 5 years of software engineering experience in C++, with significant work building performant systems from scratch (e.g., databases, device drivers, embedded systems).
- • Hands-on experience with an interactive theorem prover, ideally Rocq (formerly Coq), and ability to write machine-checked proofs about real, running C++ code.
- • Proven ability to reason rigorously about concurrency, memory models, and system correctness beyond typical engineering practices.
- • Strong instincts for software architecture, memory management, and performance profiling.
- • Bachelor’s, Master’s, or PhD in Computer Science, or equivalent practical experience.
- • Clear communication skills and ability to thrive in a small, autonomous team where ownership of outcomes is expected.
🏖️ Benefits
- • Private health insurance options
- • Flexible paid time off
- • Monthly wellness reimbursement
- • Paid parental leave
- • For US employees: 100% paid medical, dental, and vision insurance with 75% coverage for dependents, HSA + FSA options, 401(k) with company match, and lunch/dinner stipend (in-office NYC)
- • Competitive salary range of $180,000–$250,000 plus equity and token incentives
Skills & Technologies
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About Category Labs Inc.
Category Labs Inc. builds AI-driven product analytics and personalization software for e-commerce merchants. Its platform ingests catalog, customer and behavioral data to automate merchandising decisions, optimize search and recommendation rankings, and surface real-time insights. The company primarily serves Shopify brands seeking to increase conversion rates and lifetime value through machine-learning models that continuously learn from sales, inventory and margin constraints. Founded in 2023 and headquartered in New York City, it operates as a Delaware C-corporation and is backed by venture capital firms including Khosla Ventures and Y Combinator.
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