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 3 days ago
Similar jobs that could be interesting for youBased on the Application Security Engineer in New York, NY vacancy
- ...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, NY2 days 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, NY2 days 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, NY3 days ago$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, 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, NY2 days ago$200k - $235k
...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 officeWorldwideShowcify
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, NY1 day 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 homeLPL Financial LLC
New York, NY2 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, NY4 days ago $150k - $180k
...careers, contribute meaningfully, and thrive professionally. The Position We are seeking a highly skilled Senior Application Security Engineer to help establish and mature our secure software development and DevSecOps program. This role will serve as the bridge...Full timeWilson Elser
New York, NY4 days ago- ...Application Security Engineer ALPHARETTA OR NYC (2 roles) 12 months+ Department: Cloud Security & Developer Enablement, CDRR What You'll Do: Be part of a team of engineers to implement Brokerage specific security policies in the CI/CD security...Work experience placement
Veterans Sourcing Group, LLC
New York, NY1 day ago - ...Application Security Engineer - Job Description (JD) Job Title Application Security Engineer (AppSec Engineer) Job Summary We are seeking an experienced Application Security Engineer to ensure the security of software applications throughout the Software...Remote work
Ova Technologies
New York, NY3 days ago $60 - $65 per hour
...A client of Innova Solutions is immediately hiring for an Application Security Engineer Position type: Full-Time Contract (W2) Role: Application Security Engineer Duration: 6+ Months Contract Location : Remote The Application Security / DevSecOps...Hourly payFull timeContract workTemporary workFor contractorsWork experience placementImmediate startRemote workWorldwideFlexible hoursInnova Solutions
New York, NY4 days ago$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 workWorldwideSpring Health
New York, NY4 days ago- ...tech, and best job-fit for every candidate we place. Our client, a leading financial services firm, is seeking a Lead Application Security Engineer to join their team in New York, NY! Responsibilities: Application Threat Modeling Perform threat modeling...Work at office
Eleven Recruiting
New York, NY4 days ago $165.2k - $295k
...annually across thousands of connected devices. The Samsara Application Security team protects this vast footprint end-to-end, spanning cloud... ...IoT hardware in the field. As a Staff Application Security Engineer, you’ll drive the overarching technical direction for our...Remote workFlexible hoursShift workSamsara
New York, NY3 days ago$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,...Zeta Global
New York, NY9 hours ago$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, NY3 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, NY3 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...
$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$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$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$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$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,...
$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$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
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