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# Senior Application Security Engineer

- **Company:** CharterUp, LLC.
- **Location:** Austin, TX, United States
- **Experience:** Expert
- **Salary:** $150,000 - $180,000
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Geographic Information Systems, Adobe InDesign, Artificial Intelligence, Amazon Web Services, User Authentication, Automation of Tests, Cloud Computing Security, Code Review, Continuous Integration, Customer Data Management, Identity and Access Management, Key Management, PCI Data Security Standards, Software Engineering, TypeScript, Software Vulnerability Management, Data Logging, Software Security, Containerization
- **Published:** November 12, 2026
- **Apply:** https://www.careerbuilder.com/job-details/senior-application-security-engineer-austin-tx--5874f4bb-54ab-44ca-b01f-448c56b4a0fd

## About the Role

Applications Security, Software Engineering, Event Management, Operating Systems, Automotive Automation, Fortune 500 Customers, Artificial Intelligence (AI), Large-Scale Systems, Pricing, Automation, * 5+ years of experience in software engineering or security, including 3+ years in application or product security

 * Strong software engineering skills in Java and/or TypeScript, with experience building production-grade security tooling, automation, libraries, and developer-facing solutions
 * Deep expertise in application security, including threat modeling, secure system design, authentication, authorization, access control, injection, SSRF, and manual code review; familiarity with security and compliance standards, including SOC 2, PCI DSS, and GDPR is a plus.
 * Hands-on experience with AWS and cloud-native security, including IAM, multi-account architecture, containerized workloads, CI/CD security, and vulnerability management
 * Strong technical judgment and influence, with the ability to set security standards, prioritize risk, and drive remediation across engineering teams without direct authority

## Description

CharterUP is seeking a Senior Application Security Engineer to raise the bar on how we build and ship secure software. This is a dedicated security role on the Platform Engineering team. Our applications handle customer PII, passenger manifests, trip and location data, and payment flows, and they enforce authorization boundaries between thousands of parties in a two-sided marketplace. You'll be the technical leader on application security here, setting our standards, defining what "secure enough to ship" means, owning security decisions in design and code review, and driving vulnerabilities through remediation. Expect to split your time roughly evenly between building security tooling and automation and conducting threat modeling, design reviews, and targeted code reviews., * Lead security design reviews, threat modeling, and targeted manual code reviews for high-risk systems, including authentication, authorization, payments, and customer data

 * Identify and prevent multi-tenant authorization vulnerabilities across quoting, booking, and trip workflows through scalable patterns and automated testing
 * Strengthen AWS security through IAM and account boundary design, secrets management, workload protection, and comprehensive logging
 * Scale security across engineering by building secure defaults, reusable libraries, automation, and developer guardrails, and establishing a security champions practice