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Since 2012, Trail of Bits has helped secure the world’s most targeted organizations and products.
 We combine high-end security research with a real-world attacker mentality to reduce risk and fortify code.


About Trail of Bits

Trail of Bits helps secure the world’s most targeted organizations and products. We combine high-end security research with a real-world attacker mentality to reduce risk and fortify code.

As a cybersecurity research and consulting firm, we serve clients in the defense, tech, finance, and blockchain industries. We help with their most difficult security challenges by designing and building new technology, researching new techniques to advance the state of practice, and reviewing the security of the latest available technology products before they hit the market.

Our team consumes, produces, and presents research as a natural part of doing business. When we make new discoveries or developments, we strive to share our knowledge and release our tools as open-source. It’s a practice that’s earned us industry accolades and helped contribute to our double-digit bottom line growth.


Our growing team is directing the future of blockchain security. We review blockchain code and smart contracts for security vulnerabilities. Between engagements, we build custom tools like Slither, Echidna, and Manticore to aid our process. Think of all of the security tools for x86 that you would have liked to have built yourself, but mature versions already existed. Few of those tools have been built yet for blockchain architectures. Join us to make a career-defining contribution.

You will be at the forefront of blockchain security research. You will work alongside some of the best in the industry to review smart contracts, blockchain infrastructure code, and decentralized applications for security vulnerabilities, using both manual static analysis and our tool suite.

In the time between your engagements, you will work on self-study materials to further your understanding of the code, environment, and techniques used in professional software assurance audits. For the duration of the apprenticeship, you will be shadowing a senior security engineer, practicing in the off-hours, and reading on your own.

This is an intensive program designed to replace the two years of experience typically required of a Trail of Bits engineer; it is not an internship. You will be mentored by one of our senior security engineers, who will share their experience and help you to grow in the company. This opportunity is intended for entry- to mid-level professionals with some experience in blockchain programming or operations. The ideal candidate is self-driven and is likely already learning how to use our tools and studying new programming languages.

We value communication with both Trail of Bits team members and customers, so you should enjoy working as part of a team.


  • Be a member of our auditing team reviewing customer source code.
  • Learn and contribute to our reporting processes.
  • Remain engaged and focused while working closely with one of our senior security engineers.
  • Gain a thorough understanding of solidity smart contract development.
  • Become proficient in analyzing smart contract security.
  • Maintain open communications with your mentor on tasking and learning objectives.


  • (Required)
  • Three months of experience in blockchain engineering or solidity security.
  • Basic familiarity with the most common smart contracts vulnerabilities (reentrancy, front-running, arithmetic issues)
  • Basic understanding of some common cryptographic vulnerabilities.
  • Basic fluency in Solidity development and deployment of smart contracts.
  • Completed at least one public CTF (Ethernaut, CaptureTheEther, Damn Vulnerable DeFi).
  • This position has no location restriction, but does require working from an EST or European timezone.
  • (Nice to have)
  • Basic understanding of the Ethereum Virtual Machine and Yellow Paper.
  • Great written and spoken communication skills. We highly encourage all engineers to get regular face-time with customers, to write company blog posts about their accomplishments, and to deliver presentations to the technical community.

What You Will Receive In Return

  • During the apprenticeship, you will be paid as an entry-level Security Engineer at a competitive monthly rate.
  • Computing hardware will be provided for the duration of the apprenticeship.
  • In addition to the world-class training and development provided by Trail of Bits staff, after the apprenticeship period is concluded, successful candidates will be offered a full-time role as a Blockchain Security Engineer with Trail of Bits.

Company Perks

  • Before, during and after COVID-19, our workforce works flexibly. Many employees choose to work from home around the globe. As long as you deliver against your goals, we encourage you to harness your personal working style to let you work best.
  • Liberal expense policy for acquiring the equipment and software that help you do your job. If we need hardware to work effectively, we buy it.
  • We offer exceptional and tailored technical, leadership and organizational training for our team members. Everyone is encouraged to identify additional opportunities for personal professional growth with working at Trail of Bits.
  • We routinely highlight the amazing work our employees do via our blog, product offerings, and conference talks. We celebrate you!
  • We're at the forefront of a number of markets and have the internal expertise and the ambition to capitalize on those opportunities. Our employees see their work in use and valued by many others.


  • Resume & application submission
  • 30 min phone screen
  • Technical review via take home assessment or work sample request
  • 1-2 hour final interview
  • Offer


Trail of Bits is committed to creating and maintaining a diverse and inclusive workplace where our employees can thrive and be themselves! We welcome all persons into our community. We embrace the diversity of gender, gender identity or expression, race, color, religious creed, national origin, ancestry, age, physical and mental disabilities, medical condition, genetic characteristic, sexual orientation, marital status, family care or medical leave status, military or veteran status, or perceived membership in any of these groups.

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