Software Engineer - Formal Verification

Nexus; San Francisco (CA); On-site; USD 130,000 - 238,000; Full time

Job summary

An innovative firm is seeking a Software Engineer focused on Formal Verification to ensure the mathematical correctness of their systems. In this role, you will collaborate with research and engineering teams to apply formal verification techniques to critical components like consensus mechanisms and cryptographic primitives. This position offers a unique opportunity to work at the forefront of technology, contributing to the development of a world supercomputer aimed at enabling a Verifiable Internet. If you have a passion for precision and a knack for catching bugs before they exist, this is the role for you.

Benefits

Health Insurance

Daily Lunch and Dinner

Company-paid Travel to Events

Equity Compensation

Qualifications

• Experience with proof assistants and formal methods in blockchain.
• Deep curiosity about correctness and mathematical guarantees.

Responsibilities

• Apply formal verification to zkVM and Layer 1 consensus.
• Collaborate with engineers to model and verify core primitives.

Skills

Formal Verification

Cryptographic Protocols

Proof Assistants (Coq, Lean, etc.)

Distributed Systems

Mathematical Guarantees

Job description

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About Nexus

Nexus is building a world supercomputer by leveraging the latest advancements in cryptography, engineering, and science. Our team of experts is developing and deploying the Nexus Layer 1, the Nexus Network, and Nexus zkVM in support of our mission to enable the Verifiable Internet.

About Nexus

Nexus is building a world supercomputer by leveraging the latest advancements in cryptography, engineering, and science. Our team of experts is developing and deploying the Nexus Layer 1, the Nexus Network, and Nexus zkVM in support of our mission to enable the Verifiable Internet.

Nexus raised $25M in Series A funding, co-led by Lightspeed and Pantera, with participation from Dragonfly, SV Angel, and more.

We are headquartered in San Francisco, and this role will be in-person with the rest of the Nexus team.

Software Engineer - Formal Verification

As a Software Engineer focused on Formal Verification, you’ll be responsible for ensuring the mathematical correctness of the Nexus system. You’ll work closely with the research, zkVM, and Layer 1 engineers to formally verify core components—from consensus mechanisms and cryptographic primitives to critical smart contracts.

If you're someone who obsesses over catching bugs before they exist and thrives on rigor and precision, this role is for you.

Responsibilities

• Apply formal verification to the zkVM, Layer 1 consensus, and core protocol libraries.
• Collaborate with cryptographers and engineers to model and verify core primitives.
• Analyze vulnerabilities in other protocols and proactively guard against them.
• Ensure correctness in a modular, evolving codebase without slowing innovation.
  
  

Requirements

• Experience with proof assistants like Coq, Lean, Isabelle, F*, K, or equivalent.
• Familiarity with formal methods applied to blockchains, distributed systems, or cryptographic protocols.
• A deep curiosity about correctness and mathematical guarantees.
• Comfort working alongside research and engineering teams.
  
  

Bonus Points

• Research experience in formal verification for cryptographic or blockchain protocols.
• Contributions to open-source formal verification tools.
  
  

Benefits

• Competitive salary and generous equity compensation.
• Health insurance for employees and their dependents.
• Daily lunch and dinner provided at SF headquarters.
• Company-paid travel to events and conferences.
  
  

Nexus is committed to diversity in our workforce and is proud to be an Equal Opportunity Employer (EEO).

Seniority level

• Seniority level

  Entry level

Employment type

• Employment type

  Full-time

Job function

• Job function

  Engineering and Information Technology

• Industries

  Software Development

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