{"schemaVersion":"jobsearcher.job.v1","id":"312a981c63ca3f9c85d6e2b9","url":"https://jobsearcher.com/jobs/312a981c63ca3f9c85d6e2b9","canonicalUrl":"https://jobsearcher.com/jobs/312a981c63ca3f9c85d6e2b9","title":"Senior Full-Stack Engineer — Application Security","description":"Location Menlo Park, CA (San Francisco Bay Area)\r\nWorking arrangement Hybrid\r\nAbout Simulation95Simulation95 is building at the intersection of artificial intelligence, healthcare, and life sciences. We believe meaningful progress starts with people who understand the hardest problems firsthand. We're bringing together experts, researchers, and builders to turn that understanding into technology that matters.\r\nFor curious people who take their craft seriously, this is an opportunity to help shape something early- with challenging problems, meaningful responsibility, and room to make a lasting contribution.\r\nAbout the roleYou will build the applications that support expert onboarding, data collection, document handling, review, and delivery. Your work will span the front end, back end, APIs, and databases, from initial design through production.\r\nApplication security is central to this role. The software handles sensitive information and proprietary work, so access controls, data handling, and security testing must be part of everyday engineering decisions. This is a senior individual contributor position with responsibility for architecture, implementation, and product quality.\r\nResponsibilitiesDevelop product features across user interfaces, back-end services, data models, and integrations.\r\nImplement authentication, authorization, secure sessions, and appropriate separation of customer, project, and user data.\r\nBuild secure workflows for uploading, processing, storing, sharing, and deleting documents and data.\r\nReview designs and code for security weaknesses, explain their impact, and implement fixes.\r\nAdd automated tests, dependency checks, secret scanning, and security checks to development and release workflows.\r\nImprove monitoring, audit trails, error handling, and recovery while keeping sensitive information out of logs.\r\nInvestigate production failures, address vulnerabilities, improve performance, and document technical decisions.\r\nQualificationsExperience shipping and maintaining production applications across the full stack.\r\nStrong back-end development skills, including API design, relational databases, background processing, and third-party integrations.\r\nExperience implementing authentication and server-side authorization, including tests that prevent access to another user's or customer's data.\r\nPractical knowledge of injection, cross-site scripting, broken access controls, unsafe external requests, and other web application vulnerabilities.\r\nExperience deploying and troubleshooting cloud applications.\r\nAbility to work independently, explain technical tradeoffs, and communicate with technical and nontechnical colleagues.\r\nPreferred experienceApplications that handle confidential business, research, or health information.\r\nEnterprise identity integrations, single sign-on, and multifactor authentication.\r\nThreat modeling, penetration-test remediation, or security-focused code review.\r\nAI application security, including prompt injection, unintended data exposure, and permission controls for tools connected to models.\r\nData provenance, versioning, and workflows with traceable review and approval.#J-18808-Ljbffr","company":"Simulation 95","rawCompany":"simulation 95","city":"Menlo Park","state":"CA","isRemote":false,"isActive":false,"createdAt":"2026-11-04T03:16:39.030Z","occupations":[{"code":"15-1252.00","title":"Software Developers","slug":"software-developers"},{"code":"15-1299.08","title":"Computer Systems Engineers/Architects","slug":"computer-systems-engineers-architects"},{"code":"15-1299.05","title":"Information Security Engineers","slug":"information-security-engineers"}],"industries":[{"code":"541511","title":"Custom Computer Programming Services","slug":"custom-computer-programming-services"},{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"},{"code":"513210","title":"Software Publishers","slug":"software-publishers"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Senior Full-Stack Engineer — Application Security","description":"Location Menlo Park, CA (San Francisco Bay Area)\r\nWorking arrangement Hybrid\r\nAbout Simulation95Simulation95 is building at the intersection of artificial intelligence, healthcare, and life sciences. We believe meaningful progress starts with people who understand the hardest problems firsthand. We're bringing together experts, researchers, and builders to turn that understanding into technology that matters.\r\nFor curious people who take their craft seriously, this is an opportunity to help shape something early- with challenging problems, meaningful responsibility, and room to make a lasting contribution.\r\nAbout the roleYou will build the applications that support expert onboarding, data collection, document handling, review, and delivery. Your work will span the front end, back end, APIs, and databases, from initial design through production.\r\nApplication security is central to this role. The software handles sensitive information and proprietary work, so access controls, data handling, and security testing must be part of everyday engineering decisions. This is a senior individual contributor position with responsibility for architecture, implementation, and product quality.\r\nResponsibilitiesDevelop product features across user interfaces, back-end services, data models, and integrations.\r\nImplement authentication, authorization, secure sessions, and appropriate separation of customer, project, and user data.\r\nBuild secure workflows for uploading, processing, storing, sharing, and deleting documents and data.\r\nReview designs and code for security weaknesses, explain their impact, and implement fixes.\r\nAdd automated tests, dependency checks, secret scanning, and security checks to development and release workflows.\r\nImprove monitoring, audit trails, error handling, and recovery while keeping sensitive information out of logs.\r\nInvestigate production failures, address vulnerabilities, improve performance, and document technical decisions.\r\nQualificationsExperience shipping and maintaining production applications across the full stack.\r\nStrong back-end development skills, including API design, relational databases, background processing, and third-party integrations.\r\nExperience implementing authentication and server-side authorization, including tests that prevent access to another user's or customer's data.\r\nPractical knowledge of injection, cross-site scripting, broken access controls, unsafe external requests, and other web application vulnerabilities.\r\nExperience deploying and troubleshooting cloud applications.\r\nAbility to work independently, explain technical tradeoffs, and communicate with technical and nontechnical colleagues.\r\nPreferred experienceApplications that handle confidential business, research, or health information.\r\nEnterprise identity integrations, single sign-on, and multifactor authentication.\r\nThreat modeling, penetration-test remediation, or security-focused code review.\r\nAI application security, including prompt injection, unintended data exposure, and permission controls for tools connected to models.\r\nData provenance, versioning, and workflows with traceable review and approval.#J-18808-Ljbffr","datePosted":"2026-11-04T03:16:39.030Z","dateModified":"2026-11-04T03:16:39.030Z","hiringOrganization":{"@type":"Organization","name":"Simulation 95","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Menlo Park","addressRegion":"CA","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"312a981c63ca3f9c85d6e2b9"},"url":"https://jobsearcher.com/jobs/312a981c63ca3f9c85d6e2b9"}}