---
title: 'Senior Application Security Engineer at CharterUP'
canonical: 'https://feeny.ai/job/senior-application-security-engineer-charterup-austin-gtbzexff4yza'
type: 'job'
last_seen: '2026-09-10'
---

# Senior Application Security Engineer at CharterUP

- **Company:** CharterUP
- **Location:** Austin, TX
- **Compensation:** $150k–$180k
- **Posted:** 2026-09-01
- **Last confirmed live:** 2026-09-10
- **Apply:** https://job-boards.greenhouse.io/charterup/jobs/5406170008

## Job description

About CharterUP. CharterUP is transforming the $450+ billion group transportation and mobility market with an AI native platform that powers modern charter, shuttle, and emerging autonomous vehicle operations. Trusted by many Fortune 500 companies, CharterUP connects enterprises, institutions, and event organizers to thousands of bus operators nationwide, while increasingly serving as the operating system for large scale shuttle and transit programs across airports, campuses, industrial sites, and major events.

Through real time availability, transparent pricing, intelligent routing, and AI driven dispatch and optimization, CharterUP replaces a fragmented and opaque industry with automation, accountability, and scale.

## Why Join Us

- Innovative Impact: Be part of the team that's revolutionizing group travel, setting new standards in an industry overdue for change.
- Growth Opportunities: As a hyper growth company and one of the fastest-growing companies recognized by Inc., there’s no better time to join our dynamic, growth-stage organization.
- Driven Team: Collaborate with some of the most driven minds in tech, all while working in a remote-first environment with a tech hub in Austin, TX.
- Funding and Stability: Our $60 million Series A funding was just the start—we’re poised for even greater expansion, and you can be part of this exciting journey. CharterUp has achieved this growth profitability and efficiently, ensuring long-term stability.

## About the Role

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.

Title: Senior Application Security Engineer

Reports to: Engineering Manager

Location: Austin, TX (Hybrid: Monday, Wednesday, Friday in-office)

## What You’ll Do

- Own security tooling and vulnerability management across SAST, dependency and container scanning, secret detection, and penetration testing, including triage, routing, and remediation SLAs
- 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

## What You’ll Bring

- 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

Recruiting Process

- Step 1 - Video call: Talent Acquisition interview
- Step 2 - Video call: Technical interview
- Step 3 - Video call: Team interviews
- Step 4 - Offer & reference check
- Welcome aboard!

Salary $150,000—$180,000 USD

Global Benefits & Perks at CharterUP

We believe great people can live anywhere—and they deserve great benefits, too. While offerings may vary slightly by location, we prioritize hiring near our hubs in Austin, Atlanta, Miami, and Denver as we grow our global team.

- Flexible Work Model: CharterUP operates as a remote-first company, with select roles requiring regular, in-office presence based on team and business needs. Role-specific expectations will be shared during the hiring process. U.S.-based employees may reside in any of our 19 approved states.
- Comprehensive Health & Wellness: Medical, dental, and vision insurance, mental health support, virtual care, gym discounts, and family-building benefits. In the U.S., we cover 100% of premiums for employees. International benefits align with local standards.
- Time Off to Recharge: Paid time off so you can truly unplug. U.S.: 15 PTO days (increasing to 20 after 2 years) + 8 paid holidays. International policies vary by country.
- Financial Peace of Mind: Company-paid life, short-term, and long-term disability insurance where available.
- Performance-Driven Culture: Join a fast-moving, ambitious, and collaborative team that wins together.
- Referral Rewards: Earn bonuses for bringing top talent to the team.
- Planning for the Future: Long-term financial planning support. U.S.: 401(k) plan. International: region-specific savings programs where applicable.
- Top-Tier Tech: Choose a Mac or PC, plus monitor, keyboard, and mouse to hit the ground running.

CharterUP is an Equal Opportunity Employer. We are committed to creating an inclusive, accessible, and respectful workplace. We consider all qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity or expression, age, national origin, ancestry, disability, medical condition, marital status, veteran status, or any other protected characteristic in accordance with applicable federal, state, and local laws in the United States and Canada. If you require accommodation during the recruitment process, please let us know. CharterUP is committed to providing reasonable accommodations during the hiring process. If you need assistance or an accommodation, please contact your recruiter.

Hiring Locations: CharterUP U.S.-based candidates and employees must reside in one of the following states: Arizona, Colorado, Florida, Georgia, Hawaii, Mississippi, Missouri, North Carolina, New Hampshire, Nevada, New York, Oklahoma, South Dakota, Tennessee, Texas, Utah, Washington, and Wyoming.

We hire in the U.S. and Canada and are actively expanding our global footprint.

## About CharterUP

## Company Overview
- **One-liner**: CharterUP is a digital marketplace that connects groups and organizations with a nationwide network of bus operators, enabling instant booking and management of private group transportation.
- **Entity Type**: Private (Series A; raised $60M in 2022)
- **Headquarters**: Austin, Texas, United States
- **Founded**: 2018
- **Founders**: Armir Harris

## Core Business
- **Primary industry/industries**: Group transportation, travel technology, mobility services
- **Target customers**: B2B – corporations, K-12 schools, universities, government agencies (including Department of Defense), airports, professional sports teams, event organizers, and other organizations that need charter buses or shuttle services.
- **Mission or purpose statement**: “To provide a group transportation experience that’s transparent, safe, and good for the planet.”

## Products & Services
- **Charter Booking Platform (Marketplace)**: A web-based platform that lets customers compare vehicles, prices, and operator ratings, and book a charter bus in as little as 60 seconds. Includes real-time availability, dynamic pricing, and live tracking.
- **Shuttle Management System**: A proprietary system for organizations to procure buses, track payments, and manage riders under one platform. Designed for recurring shuttle routes (corporate campuses, universities, airports).
- **Operator Marketplace**: A lead-generation and management platform for bus operators, providing qualified leads, pricing tools, and driver/vehicle tracking to help keep fleets busy year-round.

## Market Standing
- **Valuation/Market Cap**: Not publicly disclosed (private company)
- **Key Metric**: Annual Revenue of ~$150 million (LinkedIn estimate) and Total Funding of $60 million (Series A, October 2022)
- **Notable Investors/Partners**: Lead investor Tritium Partners (Series A). Partners with 700+ bus operators nationwide.
- **Growth Signals**: Ranked as America’s No. 2 fastest-growing company (source: careers page). Headcount grew 6.8% YoY to 214 employees. Processes 20,000+ qualified leads per month. Serves 100,000+ customers and millions of passengers annually. In 2022, claimed to have cut over 1 billion miles of carbon emissions through group travel.

## Competitive Advantages
- **First online marketplace** for charter buses, bringing transparency and instant booking to a traditionally offline, opaque industry.
- **Nationwide network** of 700+ operators provides backup and coverage, ensuring trip reliability.
- **Speed and convenience**: Booking in 60 seconds eliminates the old process of calling multiple vendors and waiting days for quotes.
- **Vertical integration**: Platform handles everything from booking to payment to rider management, creating a sticky ecosystem for both customers and operators.

## Strategic Focus
- **Sustainability**: Promoting group travel as a greener alternative to individual car trips; actively measuring and reducing carbon emissions.
- **Platform expansion**: Moving beyond one-time charters into long-term shuttle programs for corporates, schools, and airports.
- **Technology investment**: Hiring engineers and data scientists to improve pricing algorithms, real-time tracking, and automation.
- **Geographic growth**: Operating in 7 countries (US, Brazil, Canada, El Salvador, Philippines, Georgia) and hiring in Austin, Miami, and remote locations.

## Why Work Here
- **Remote-first culture** with hubs in Atlanta, Austin, and Miami; flexible work environment that encourages work-life balance.
- **Rapid growth trajectory** – employees have opportunities to broaden skills, take ownership, and make a direct impact on a $30 billion market.
- **Values-driven**: Core values include innovation, collaboration, customer focus, sustainability, and taking ownership. Emphasis on diversity and inclusion.
- **Perks**: Competitive salary, medical/vision/dental insurance, generous parental and family leave, and a real family leave policy.
- **Engineering culture**: Described as small, nimble teams working on challenging projects; world-class engineers and managers; focus on innovation and speed.
- **Community impact**: Opportunity to work on a product that supports local economies and reduces carbon emissions.

## Sources
1. [charterup.com/about-us](https://www.charterup.com/about-us/)
2. [charterup.com/careers](https://www.charterup.com/careers/)
3. [charterup.com](https://www.charterup.com/)
4. [job-boards.greenhouse.io/charterup](https://job-boards.greenhouse.io/charterup)
5. [linkedin.com/company/charterup](https://www.linkedin.com/company/charterup)

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