Blockchain Security Expert - Chain Security Evaluation Track

Devconnectplatform; United States; Remote; USD 120,000 - 180,000; Full time

Benefits offered by this job

Medical insurance

401(k) with company matching

Flexible paid time off

Job summary

CertiK, a leader in blockchain security, is seeking a Senior Security Engineer to conduct in-depth evaluations of nodes, validators, and network ecosystems. You will review Cosmos SDK, CometBFT, Geth, and other frameworks, identify consensus and permission issues, and develop scripted tests in Python or Bash to model stress and edge cases.

Join a team of researchers driving secure infrastructure for blockchain projects, with a remote-friendly environment and competitive compensation in the US

Qualifications

• Strong written and spoken English communication.
• High diligence and attention to detail for long-running experiments.
• Solid understanding of blockchain architecture and node internals (Cosmos SDK/CometBFT, Geth, Hyperledger).

Responsibilities

• Conduct in-depth security evaluations on blockchain nodes, validators, and networks.
• Review blockchain frameworks and assess consensus safety and chain integrity.
• Implement and run custom scripts to simulate real-world validator and network scenarios.

Skills

Blockchain security

Python scripting

Docker

Geth internals

English communication

Tools

Docker

Geth

Cosmos SDK

CometBFT

Hyperledger Fabric

Besu

Job description

# Blockchain Security Expert - Chain Security Evaluation TrackCertiK120k–180k USDFull-timeremote· seniorUSAnodegopythondockerweb3Listed via Jobicy · posted 11 Nov 2026. The application happens there, not on DevConnect.Apply on Jobicy## DescriptionAbout YouYou’re a self-starter who thrives on tackling the toughest and most meaningful problems, even if they are the most difficult problems. You’re comfortable with the unknown and understand that #startuplife means that you’re going to be wearing multiple hats. And that’s what motivates you. You’re accountable and obsessed with improvement, both in yourself and in others. You’re up to the challenge of building a world-class company that aims to be the infrastructure for more secure software for all.About the CompanyCertiK leads blockchain security by protecting smart contracts and blockchains with cutting-edge Formal Verification technology. Founded by Computer Science professors of Yale University and Columbia University, CertiK has audited and secured over $500B in assets, including many of the world’s top blockchain projects.About the RoleThe primary responsibility of this role is for CertiK’s security-related services. Intersecting cybersecurity and blockchain, CertiK’s security offerings include security consulting, security reviews, security auditing of smart contracts and blockchains, verification of smart contracts, penetration testing, and more.As a Security Engineer at CertiK, you will contribute to the security offerings of the company, working with the rest of the security team to deliver the best products and services. You might engage directly with CertiK’s existing and future clients, participate in expanding security-related products and services, and follow the blockchain world on emerging security problems and trends.Responsibilities- Conduct in-depth security evaluations on blockchain nodes, validators, consensus mechanisms, mempool behavior, networking layers, and chain modules.- Review and analyze blockchain frameworks such as Cosmos SDK, CometBFT, Geth, Hyperledger, and other L1/L2/L3 infrastructures.- Identify security issues related to consensus safety, chain halting, permission models flaws, block production vulnerabilities.- Implement and run custom scripts and test scenarios to simulate real-world validator/network behaviors, chain stress conditions, and edge cases.Requirements- Strong written and spoken English communication skills.- High diligence and strong attention to detail, especially in multi-step testing and long-running experiments.- Solid understanding of blockchain architecture and node internals (e.g., Cosmos SDK / CometBFT, Go-Ethereum (Geth) internals, and Hyperledger Fabric / Besu)- Strong scripting & automation skills with Python or Bash- Familiarity with Docker and containerized testing environments.- Prior experience in manual Web3 security auditing is preferred, but not required.What We Offer- Opportunity to shape the national conversation on blockchain and security.- Collaborate with industry-leading security researchers, technologists, and global institutions.- Flexible work environment and mission-driven culture.CompensationAdditional InformationCompensation: If the role is performed in the US, the target annual compensation is $120,000 - $180,000. The exact compensation at which this job is filled will be determined by the skills and experience of qualified candidates.#blockchain#startups#hiringCertiK accepts applications for this position on an ongoing basis.CertiK is proud to offer medical, vision, and dental insurance, 401(k) plan with company matching, life and accidental death and dismemberment insurance, HSA (with high deductible plan), FSA, and other benefits to all full-time employees, along with flexible paid time off and holidays. CertiK also offers a variable commission program for business development sales roles.In compliance with federal law, all persons hired will be required to verify identity and eligibility to work in the United States and to complete the required employment eligibility verification form upon hire.CertiK is proud to be an equal opportunity employer. We will not discriminate against any applicant or employee on the basis of age, race, color, creed, religion, sex, sexual orientation, gender, gender identity or expression, medical condition, national origin, ancestry, citizenship, marital status or civil partnership/union status, physical or mental disability, pregnancy, childbirth, genetic information, military and veteran status, or any other basis prohibited by applicable federal, state or local law.CertiK will consider for employment qualified applicants with criminal histories in a manner consistent with local and federal requirements.https://www.eeoc.gov/sites/default/files/migrated\\_files/employers/poster\\_screen\\_reader\\_optimized.pdfAll CertiK employees are expected to actively support diversity on their teams, and in the Company.