Talent Wanted. For hazardous journey. Small wages, bitter cold, long months of complete darkness, constant danger, safe return doubtful. Honour and recognition in case of success.
\nFridtjof Nansen crossed the Arctic, going places no human had ever been. Together with our users, we're doing the same onchain , and someone needs to make sure we don't get killed on the way there.
\nWe're building the single best platform for onchain investing , agentic trading, staking infrastructure, AI-powered analytics , and we're scaling fast. Fast enough that security can't be an afterthought bolted on later. It has to be built in, from the start, by someone who knows what they're doing.
\nOur mission:
\nSurface the signal and create winners.
\nWhat you'll do at Nansen
\nYou'll be the person who makes sure we can move fast without breaking things that matter. That means embedding security into everything we build , cloud infrastructure, applications, CI/CD pipelines, AI systems, staking operations , across a generalist role that spans the full surface area.
\nWhat we're looking for
\nWhat we offer our crew
\nXML job scraping automation by YubHub
","url":"https://yubhub.co/jobs/job_68e291fb-412","directApply":true,"hiringOrganization":{"@type":"Organization","name":"Nansen","sameAs":"https://nansen.ai/","logo":"https://logos.yubhub.co/nansen.ai.png"},"x-apply-url":"https://job-boards.greenhouse.io/nansen/jobs/5811520004","x-work-arrangement":"remote","x-experience-level":"senior","x-job-type":"full-time","x-salary-range":null,"x-skills-required":["cloud security","container security","network security","security tooling","secrets management","key management","access controls","API key management","prompt injection prevention","LLM security","CI/CD pipeline security","compliance","SOC 2","ISO 27001"],"x-skills-preferred":["blockchain security","smart contract security","staking infrastructure security","Kubernetes security","Terraform security","incident response","security operations"],"datePosted":"2026-04-17T12:47:56.366Z","jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Remote Europe | Remote Asia"}},"jobLocationType":"TELECOMMUTE","employmentType":"FULL_TIME","occupationalCategory":"Engineering","industry":"Technology","skills":"cloud security, container security, network security, security tooling, secrets management, key management, access controls, API key management, prompt injection prevention, LLM security, CI/CD pipeline security, compliance, SOC 2, ISO 27001, blockchain security, smart contract security, staking infrastructure security, Kubernetes security, Terraform security, incident response, security operations"},{"@context":"https://schema.org","@type":"JobPosting","identifier":{"@type":"PropertyValue","name":"YubHub","value":"job_2798986b-685"},"title":"Security Engineering Lead","description":"As a Security Engineering Lead on our team, you'll be leading the security and auditing efforts for Espresso's codebase leading up to, and beyond, launch. We are looking for an experienced security engineering and software auditing professional who can lead review processes of our design and codebase.
\nResponsibilities:
\nLead security audits of (a subset of) the Espresso codebase\nAs a project leader, you will have mobility in how you choose to organize security and audit efforts\nDive into the code of a fairly complex distributed system, learning and developing an understanding of the system on the fly (with help from the engineering team that built it, of course)\nCoordinate with several engineering teams to aid in your audit, raise concerns and communicate results, and guide the effort to harden the system based on your findings\nCoordinate with, manage, and review the work of external security auditing teams, in certain cases\nSuggest improvements to testing and engineering practices to promote more secure and maintainable code
\nRequirements:
\nSolid grasp of software engineering principles, both low-level (e.g. language-specific best practices) and high-level (e.g. reliable software architecture, particularly in distributed systems)\nIf focused on Rust: ≥ 1 year experience writing Rust, particularly with async Rust.\nIf focused on Solidity: Multiple years experience writing smart contracts; experience with smart contract security audits or formal verification of smart contracts\nExperience as an engineer or software architect in a security-critical industry\nBe capable of describing the stakes, the challenges you've faced in building secure software, and the steps/processes you've taken to mitigate risk\nExperience as an auditor, pentester, QA tester, etc.\nHave a well thought-out approach to testing software and designing it to be testable/auditable\nAbility to think adversarially, and identify potential reliability or security vulnerabilities even in software that is correct in common or “happy path” scenarios\nExperience on the design and/or testing of distributed systems\nComfort diving into unknowns and asking questions
\nPreferred:
\nKnowledge of relevant testing and static analysis tools (e.g. Foundry, Slither) is a plus\nBlockchain knowledge/experience is preferred, but could also be include IoT, automotive, finance, etc.\nIdeally, the candidate should have a general philosophy of software design that has been molded by experience working on security-critical systems
\nBenefits:
\nFully remote with flexible hours\nWork alongside the brightest minds in the crypto space\nCompetitive salary + equity package\nRegular team off-sites to international locations\nUnlimited vacation policy\nTop-tier health, dental, and vision coverage for US employees
\nXML job scraping automation by YubHub
","url":"https://yubhub.co/jobs/job_2798986b-685","directApply":true,"hiringOrganization":{"@type":"Organization","name":"Espresso Systems","sameAs":"https://www.espressosystems.com/","logo":"https://logos.yubhub.co/espressosystems.com.png"},"x-apply-url":"https://jobs.lever.co/Espresso/135f4767-f690-41f8-9ab0-95fd9d398677","x-work-arrangement":"remote","x-experience-level":"senior","x-job-type":"full-time","x-salary-range":null,"x-skills-required":["Rust","async Rust","Solidity","smart contract security audits","formal verification of smart contracts","software engineering principles","low-level programming","high-level programming","distributed systems","testing and static analysis tools","Foundry","Slither"],"x-skills-preferred":["blockchain knowledge","IoT","automotive","finance"],"datePosted":"2026-04-17T12:31:17.516Z","jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Remote"}},"jobLocationType":"TELECOMMUTE","employmentType":"FULL_TIME","occupationalCategory":"Engineering","industry":"Technology","skills":"Rust, async Rust, Solidity, smart contract security audits, formal verification of smart contracts, software engineering principles, low-level programming, high-level programming, distributed systems, testing and static analysis tools, Foundry, Slither, blockchain knowledge, IoT, automotive, finance"}]}