Application Security Engineer
Reuben Cooley, Inc.
Senior Application Security Engineer with Hands on Python
Location- Princeton, NJ & NYC, NY (Hybrid)
• 8-15+ years in software engineering and application security, with substantial hands-on development experience (not security-adjacent - you've shipped code).
• Strong Python for automation and tooling.
• Proficiency with Claude Code - you use it daily and know your way around its extensibility (skills, subagents, hooks, slash commands, and MCP integrations) to build reusable security workflows and automation, with a clear-eyed view of its strengths and failure modes.
• Working understanding of AI agents and agentic frameworks, and the emerging security concerns around them (OWASP LLM Top 10, agent tool permissions, prompt injection, supply-chain risk in model/tooling).
• Depth in secure SDLC, threat modeling, and common vulnerability classes (OWASP Top 10, API security, authn/authz).
• The judgment to know when to automate, when to escalate, and when to just fix it yourself.
Nice to have
• Experience securing production LLM/agentic systems or building internal AI security tooling.
• Contributions to open-source security tools.
• Relevant certifications (OSCP, GWAPT, CSSLP) - helpful, not required.
Location- Princeton, NJ & NYC, NY (Hybrid)
• 8-15+ years in software engineering and application security, with substantial hands-on development experience (not security-adjacent - you've shipped code).
• Strong Python for automation and tooling.
• Proficiency with Claude Code - you use it daily and know your way around its extensibility (skills, subagents, hooks, slash commands, and MCP integrations) to build reusable security workflows and automation, with a clear-eyed view of its strengths and failure modes.
• Working understanding of AI agents and agentic frameworks, and the emerging security concerns around them (OWASP LLM Top 10, agent tool permissions, prompt injection, supply-chain risk in model/tooling).
• Depth in secure SDLC, threat modeling, and common vulnerability classes (OWASP Top 10, API security, authn/authz).
• The judgment to know when to automate, when to escalate, and when to just fix it yourself.
Nice to have
• Experience securing production LLM/agentic systems or building internal AI security tooling.
• Contributions to open-source security tools.
• Relevant certifications (OSCP, GWAPT, CSSLP) - helpful, not required.
Vacancy posted 2 days ago
Similar jobs that could be interesting for youBased on the Application Security Engineer in New York, NY vacancy
$100k - $258k
...knowledge. Our team is small, highly motivated, and focused on engineering excellence. This organization is for individuals who... ...teammates.ABOUT THE ROLE:We are seeking a skilled and innovative Application Security Engineer to join ð Money. In this role, you will protect...SuggestedPermanent employmentTemporary workX
New York, NY15 hours ago$150 per hour
A financial firm is looking for an Application Security Engineer to join their team in Iselin, NJ or NYC.Compensation: $150-200kResponsibilities:Perform Application Security scans (e.g. DAST and SCA) on applications and APIs to identify security vulnerabilities and weaknessesTriage...SuggestedOpen Systems Technologies
New York, NY2 days ago- ...SaaS Security Engineer 6–9 Month Contract | Potential Extension Hybrid – New York City | 2–3 Days/Week Onsite Overview Our client... ...help strengthen the security posture of its critical SaaS applications. This role will focus heavily on SaaS Security Posture...SuggestedContract work2 days per week3 days per week
Clear Point Consultants
New York, NY1 day ago - ...partnered with a Financial Services firm in search for an Application Security professional to join their team. Responsibilities: Conduct... ...: Computer Science, Information Management, Computer Engineering, Cybersecurity or equivalent Certifications: CISSP, CEH,...SuggestedFull timeVisa sponsorship
Lawrence Harvey
New York, NY1 day ago $244k - $305k
As a Staff Application Security Engineer at Datadog, you'll set technical direction for how we approach application security at scale. You'll define the frameworks, methodologies, and architectural patterns that engineering teams across Datadog adopt and apply independently...SuggestedDatadog
New York, NY1 day ago- ...Application Security Engineer The mission of the Cloud Security & Developer Enablement team is to implement the Firm's Cybersecurity Strategy by architecting, engineering, deploying and operating technical security controls and capabilities for the Enterprise. This...Work experience placement
TriOptus LLC
New York, NY3 days ago $100.63k - $167.79k
...Sr. Application Security Engineer Where Ambition Meets Innovation Build a career that matches all your initiative with an impressive dose of innovation. From cutting-edge resources and a collaborative environment to the freedom to make an impact and more, you'll...Work from homeThe Private Trust Company, an affiliate of LPL
New York, NY4 days ago- ...Because at Valence, the work worth doing is the kind that redefines work itself. The Role We are seeking a seasoned Application Security Engineer to help us secure our products and platform that serve our Fortune 500 customers. In this pivotal role, you will be...Full timeFreelanceWork from home
Valence
New York, NY3 days ago $180k - $258k
...Product Security Engineer We are looking for a Product Security Engineer to join our team and act as a champion for security within our... ...security engineering, specifically focusing on product security or application security. Technical Skills: Proficiency in one or...Shift workCandid Health
New York, NY5 days ago- ...SpaceXAI is seeking an Application Security Engineer to protect the security and integrity of payments and financial products across the software development lifecycle. You will oversee code security, secure CI/CD practices, and SBOM‑driven supply chain controls while...
$1,000 per month
...and keep building AI fluency in ways that support their role and our mission. Spring Health is looking for a Senior Application Security Engineer II to join our growing Application Security team. Reporting to the Manager, Application Security, you will play a key role...Full timeWork experience placementRemote workWorldwide$121.4k - $166.7k
...industry.Rockstar is on the lookout for a passionate Senior Security Platform Engineer who is skilled at diving into complex software designs to... ...in Downtown Manhattan. WHAT WE DOThe Rockstar Games Application Security team partners with numerous development teams across...Full timeWork at officeRockstar Games
New York, NY2 days ago- ...Job Title: Application Security Engineer Client: JPMC Employment Type: W2 Contract Location: Albany, NY Hybrid Job Summary JPMC is seeking an experienced Application Security Engineer to work closely with development teams on enterprise Java...Contract work
SoftPathTechnologies
New York, NY2 days ago $192k - $240k
...support you need to grow your career. Engineering at Brex Engineering at Brex is about building... .... Our teams span Software, Data, Security, and IT, and operate with high autonomy... ...become leaders. What you’ll do As a Senior Application Security Engineer, you will focus on...Remote jobWork experience placement- Overview Application Security Engineer Remote within the US US Citizen Approximately 8 Month Contract (w/ possible extensions) Summary The Application Security Engineer candidate will have a strong background in cybersecurity and understanding of web application and zero...Contract workRemote work
- ...across 17+ industries. We rank among the leaders in areas like application development and AI/ML, and our people-first culture has... ...you! ABOUT THE ROLE We are looking for a Senior Application Security Engineer to strengthen secure coding and DevSecOps practices across engineering...Work at officeWork from homeVisa sponsorshipWork visa
$190k - $237k
...more, and counts the former President and COO of Hubspot, JD Sherman, among its board members. Role Overview The Senior Application Security Engineer is a senior individual contributor responsible for strengthening Apollo’s secure software development lifecycle and reducing...WorldwideFlexible hours$169k - $220k
...lower cost through early diagnosis and longitudinal care management of chronic conditions. We are looking for a Senior Application Security Engineer to break Counterpart Assistant before anyone else does. This is a hands-on offensive security role on our Eng Core team,...Work experience placementWork at officeRemote workFlexible hours- The Estée Lauder Companies Inc. is seeking an experienced Application Security professional to evangelize our security strategy under the Global Head of Application Security. You will work on SDLC security, DevSecOps, and multi-cloud initiatives to deliver trusted software...
- Estée Lauder Companies in New York seeks an experienced Application Security professional to lead secure SDLC initiatives, DevSecOps integration... ...and partners. This role emphasizes collaboration with IT, engineering, and security stakeholders to implement threat modeling,...
$160.3k - $240.5k
...architecture, retail, energy, and government. Our Product Security team keeps that platform, and the software built on top... ...millions of creators and their users. We are seeking a Senior Application Security Engineer with profound expertise in application security. In this...Work at officeWorldwide$75.2k - $158.1k
Job Title: Application Security Engineer Job Category: Information Technology Time Type: Full time Minimum Clearance Required to Start: Secret Employee Type: Regular Percentage of Travel Required: Up to 10% Type of Travel: Local * * * The Opportunity: Join a mission‑driven...Full timeContract workWork experience placementInterim roleLocal areaFlexible hours$82k - $118k
...available while providing a level of professionalism and service unsurpassed in the lending industry. Position Summary The Application Security Engineer at Guild Mortgage supports the security of our applications, including AI-enabled applications and services. Working...Minimum wageWork at officeLocal areaWork from homeMonday to FridayShift work$130k - $190k
...that a workforce reflecting the richness of our communities and customers helps us better serve their needs. The Senior Application Security Engineer serves as a hands-on technical authority for the security of Mitek’s software products. This role bridges Information Security...Remote workWork from homeWorldwideHome office$130k - $190k
...This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Sr. Application Security Engineer based in United States. This is a highly technical Application Security role focused on protecting software...Remote workWork from homeHome office- Driving the technical direction for application security and vulnerability management programs, the full-time Staff Application Security Engineer will work remotely within the US (excluding specific metro areas) to lead strategy, improve processes, and mentor engineers...Full timeRemote work
$220k - $250k
...headquartered in New York City with offices around the world. To learn more, go to About the Role We’re seeking a Lead Application Security Engineer to help advance Zeta Global’s application and platform security posture through AI-native security practices, intelligent...$177k - $225k
...Pacific Standard time zone** Are you passionate about securing global-scale ecommerce services and applications that power millions of customers across over a... ...looking for a hands-on Principal Product Security Engineer to lead our Secure Development Lifecycle assurance...Remote work$120.38k - $192.6k
...location. Relocation assistance: is not available for this opportunity. Requisition #: 76525 The Role at a Glance The Lead Application Security Engineer is responsible for working with application development and infrastructure teams to ensure applications are designed,...Work experience placementWork at officeRemote workWork from homeRelocation package$200k - $235k
...our New York City office to support collaborative team dynamics and innovative problem-solving. We are seeking a Senior Application Security Engineer to lead the technical execution of our product security strategy. This role focuses on securing high-growth FinTech and...Full timeWork at officeWorldwide
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Application Security Engineer. Be the first to apply!
Related searches
- application security engineer New York, NY
- field applications engineer New York, NY
- application engineer New York, NY
- application engineering manager New York, NY
- application operations engineer New York, NY
- application performance engineer New York, NY
- technical application engineer New York, NY
- project application engineer New York, NY
- junior application support engineer New York, NY
- network applications engineer New York, NY