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Senior Software Engineer

CertiK

CertiK

Software Engineering
New York, NY, USA
USD 132k-180k / year
Posted on Dec 27, 2025
About You
You have a background in programming language theory and automated reasoning and love to work on the forefront of applying results from theoretical computer science. You love to tackle computationally hard problems and have a proven track record of achieving results, where results are people using your tool to do their jobs. You are collaborative: you share ideas, love to brainstorm with peers, and give and receive feedback. You are comfortable with the unknown and understand that #startuplife means that you will be wearing multiple hats.
About the Company
CertiK leads blockchain security by securing 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 Role
You will design and develop tools that automatically ensure the correctness of smart contracts or identify security issues and bugs in smart contracts. We have software engineer positions available at all levels of seniority. Title and responsibilities will be commensurate with experience and background.
As part of our multinational team of programming language experts, you will participate in the development of tools that rest upon techniques such as symbolic model checking, SAT/SMT solving, abstract interpretation, data flow analysis, and deductive verification. You will have the opportunity to work on all stages of tool development from idea generation to implementation and iterative improvements. Our team is highly supportive and collaborative with great opportunities to learn and grow.

Responsibilities

  • Lead end-to-end feature development, from user interface implementation/backend logic to smart contract/blockchain integration, in a fast-paced/product-driven environment.
  • Design/develop modern/responsive full-stack Web3 applications.
  • Build/deploy/maintain robust backend systems/APIs/microservices for blockchain data processing/user interaction/real-time functionality.
  • Process/analyze on-chain/off-chain data & integrate wallet connectivity via secure/scalable Web3 tools.
  • Create engaging frontend that incorporates interactive data visualizations, animations, UI/UX best practices & SEO strategies to enhance engagement/retention.
  • Monitor advancements in Web3 ecosystem, including developer tooling/blockchain protocols/web technologies, to enhance stack efficiency & maintain architectural modernization.

Requirements

  • Master’s degree in Computer Science/Engineering or a related field
  • Advanced knowledge of algorithms/data structures/operating systems/computer architecture/network protocols.
  • In-depth understanding of blockchain fundamentals, including decentralized networks/Web3 infrastructure/smart contract development (EVM/Web3.js)
  • Expertise in frontend development using React/JavaScript/TypeScript/HTML/CSS & backend development, including API architecture/design, server-side development & caching strategies
  • Proficiency in cloud services (AWS/S3/EC2).
Compensation: The target annual compensation is $132,000 - $180,000. The exact compensation at which this job is filled will be determined by the skills and experience of qualified candidates.
#blockchain
#startups
#hiring
CertiK 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.
All CertiK employees are expected to actively support diversity on their teams, and in the Company.