---
title: 'Staff Application Security Engineer at Brex'
canonical: 'https://feeny.ai/job/staff-application-security-engineer-brex-united-states-3h1zd0ck9h8n'
type: 'job'
last_seen: '2026-09-04'
---

# Staff Application Security Engineer at Brex

- **Company:** Brex
- **Location:** United States
- **Work type:** remote
- **Posted:** 2026-06-25
- **Last confirmed live:** 2026-09-04
- **Apply:** https://www.brex.com/careers/8584366002?gh_jid=8584366002

## Job description

## Why join us

Brex is the intelligent finance platform that enables companies to spend smarter and move faster in more than 200 markets. By combining global corporate cards and banking with intuitive spend management, bill pay, and travel software, Brex enables founders and finance teams to accelerate operations, gain real-time visibility, and control spend effortlessly. Brex’s AI-native automation and world-class service eliminate manual expense and accounting tasks for customers so they can focus on what matters most. Tens of thousands of the world's best companies run on Brex, including DoorDash, Coinbase, Robinhood, Zoom, Plaid, Reddit, and SeatGeek.

Working at Brex allows you to push your limits, challenge the status quo, and collaborate with some of the brightest minds in the industry. We’re committed to building a diverse team and inclusive culture and believe your potential should only be limited by how big you can dream. We make this a reality by empowering you with the tools, resources, and support you need to grow your career.

Engineering at Brex

Engineering at Brex is about building systems that scale with speed and intention. Our teams span Software, Data, Security, and IT, and operate with high autonomy and deep collaboration. We tackle hard technical problems, own our outcomes, and push for excellence at every level — from architecture to deployment. It’s an environment where engineering is a craft, and builders become leaders.

Responsibilities:

- Lead the technical vision and strategic roadmap for the Application Security team, aligning security objectives with Brex's enterprise growth and high-velocity engineering metrics.
- Establish technical standards and secure defaults across the entire engineering organization, fostering a culture of collaborative security excellence and bridging product platforms, infra, and trust.
- Architect and secure novel AI/ML and agentic workflows, applying cutting-edge practices to mitigate risks such as prompt injection, model manipulation, and data poisoning.
- Mentor and coach engineers within the team and across the broader organization, guiding technical growth, helping individuals level up their security expertise, and accelerating team delivery.
- Drive proactive vulnerability discovery and offensive security testing strategies, executing complex attack chains to demonstrate business impact and prioritize cross-functional remediation.
- Partner with Product Platform, Cloud Infrastructure, and Data engineering teams to ensure core primitives, APIs, and microservices are secure by default from design to deployment.

Requirements:

- 8+ years of experience in Application Security, Product Security, or software engineering with a primary focus on offensive and defensive application security.
- Proven track record of technical leadership and team mentorship on complex, multi-quarter security engineering initiatives in a fast-paced environment.
- Deep proficiency and technical expertise in AI security, including hands-on experience securing agentic architectures, LLM gateways, and evaluating adversarial AI vectors.
- Strong systems-thinking capabilities with extensive experience defining secure product development lifecycles, threat modeling complex topologies, and cloud-native container security (AWS, Kubernetes).
- Proficiency in Python, Go, or similar languages to architect internal tooling, pipeline automation, and advanced detection/scanning engines.
- Exceptional written and verbal communication skills, with a demonstrated ability to navigate ambiguity, influence technical leaders, and manage up and out across EPD organizations.

Bonus Points:

- Experience with Kotlin, gRPC, GraphQL, Kubernetes
- Previous experience in building and scaling security teams
- Experience with securing distributed systems in AWS and cloud environments
- Contributions to the wider technical community — open source, public research, CTF participation, blogging, CVEs, or presentations
- Experience submitting to bug bounty or responsible disclosure programs
- Published AI security research or contributions to AI security frameworks

Compensation:

The expected salary range for this role is $240,000 USD - $300,000 USD. However, the starting base pay will depend on a number of factors including the candidate’s location, skills, experience, market demands, and internal pay parity. Depending on the position offered, equity and other forms of compensation may be provided as part of a total compensation package. Please be aware, job-seekers may be at risk of targeting by malicious actors looking for personal data. Brex recruiters will only reach out via LinkedIn or email with a [brex.com](http://brex.com/) domain. Any outreach claiming to be from Brex via other sources should be ignored.

## About Brex

## Company Overview
- **One-liner**: Brex provides a modern finance platform combining corporate cards, expense management, travel booking, banking, and treasury services, all powered by AI-driven automation.
- **Entity Type**: Private (backed by venture capital; last known Series D3 at $12.3B valuation in 2022)
- **Headquarters**: San Francisco, California, United States
- **Founded**: 2017
- **Founders**: Henrique Dubugras and Pedro Franceschi

## Core Business
- Primary industry/industries: Financial technology (fintech) – specifically spend management, corporate cards, expense automation, and business banking.
- Target customers: B2B – startups, mid-size companies, and enterprises; over 35,000 companies use Brex.
- Mission/purpose statement: "Empower employees anywhere to make better financial decisions."

## Products & Services
- **Corporate Cards**: Physical and virtual corporate cards with built-in spend controls, real-time budgets, and cash back/rewards.
- **Expense Management**: AI-powered automation for receipts, expense reports, and approvals; integrates with ERP systems.
- **Travel**: In-app global travel booking and management with policy enforcement.
- **Bill Pay**: Automated invoice entry, approval workflows, and vendor payments.
- **Banking & Treasury**: Business cash accounts with up to 4.36% yield, same-day liquidity, and up to $6M in additional FDIC insurance.

## Market Standing
- **Valuation/Market Cap**: $12.3 billion (Series D3, 2022 – recent valuation not disclosed; may have changed)
- **Key Metric**: Over 35,000 businesses use Brex (source: brex.com). Total funding exceeds $1.5 billion (publicly reported, not detailed in provided sources).
- **Notable Investors/Partners**: Greenoaks, IVP, Tiger Global, Y Combinator, Kleiner Perkins, DST Global, Max Levchin, Peter Thiel, Lone Pine Capital, Ribbit Capital.
- **Growth Signals**: Named #2 on Fast Company’s 2023 Top 50 Disruptors; expanding AI-driven finance automation; 756 hours average time saved per year for customers; 71% of expenses prepared on Brex handled entirely by automation.

## Competitive Advantages
- **All-in-one platform**: Combines cards, expense management, travel, bill pay, and banking in a single stack – reducing the need for multiple vendors.
- **AI-powered automation**: Uses AI to automate receipt capture, expense categorization, approval workflows, and GL coding, enabling faster close.
- **Higher credit limits**: Offers up to 30x higher credit limits compared to traditional providers.
- **Founder-centric culture**: Over 100 Brex alumni have started their own companies (4x industry average), signaling a culture that breeds entrepreneurship.

## Strategic Focus
- **AI-first finance**: Continually investing in AI to eliminate manual work (e.g., AI expense assistant, invoice automation).
- **Global expansion**: In-app global travel and multi-entity support for international teams.
- **Enterprise penetration**: Deepening ERP integrations, procurement flows, and vendor-specific card controls for mid-market and enterprise clients.
- **Cash management innovation**: Offering competitive treasury yields to attract and retain deposits.

## Why Work Here
- **Culture**: Emphasizes “Be the founder of your career” – hires people with “grit, autonomy, and ambition” and supports rapid growth. Values include Growth Mindset, Ownership, Customer Obsession, and One Brex.
- **Remote-first**: Committed to remote-first work, with in-office days/offsets for connection and up to 4 fully remote weeks per year. Employees can optimize time and location.
- **Benefits**: Generous parental leave, Carrot Fertility, Milk Stork, medical/dental/vision, Spring Health (mental health), Calm app, generous vacation, and year-end company shutdown.
- **Headcount**: ~800 employees (Built In), 501–1,000 range (The Muse) with 7 offices globally.
- **Engineering focus**: Strong engineering culture visible through “Building Brex” blog and emphasis on automation and AI.

## Sources
1. [brex.com](https://www.brex.com/careers)
2. [brex.com](https://www.brex.com/about)
3. [brex.com](https://www.brex.com/index)
4. [builtin.com](https://builtin.com/company/brex/faq/workplace-perception)
5. [themuse.com](https://www.themuse.com/profiles/brex)

## Other roles at Brex

- [Senior Brand Designer](https://feeny.ai/job/senior-brand-designer-brex-san-francisco-california-naz3vcb0ajxa) — San Francisco California, United States
- [Senior Brand Designer](https://feeny.ai/job/senior-brand-designer-brex-new-york-new-york-jryvamsa02rh) — New York New York, United States
- [Staff Brand Designer](https://feeny.ai/job/staff-brand-designer-brex-new-york-new-york-860hz4z5peyx) — New York New York, United States
- [Staff Brand Designer, Interactive](https://feeny.ai/job/staff-brand-designer-interactive-brex-san-francisco-california-tctq99dzznzk) — San Francisco California, United States
- [Staff Brand Designer](https://feeny.ai/job/staff-brand-designer-brex-san-francisco-california-0rvtk7nhjd04) — San Francisco California, United States
- [Staff Product Manager, AI](https://feeny.ai/job/staff-product-manager-ai-brex-new-york-new-york-asgk4ngp12p5) — New York New York, United States
- [Senior Product Manager, AI](https://feeny.ai/job/senior-product-manager-ai-brex-seattle-washington-dkks7rn8af5a) — Seattle Washington, United States
- [Senior Product Manager, AI](https://feeny.ai/job/senior-product-manager-ai-brex-san-francisco-california-d3xgnnx0053a) — San Francisco California, United States
- [Staff Product Designer](https://feeny.ai/job/staff-product-designer-brex-seattle-washington-v2rf7njx2t6c) — Seattle Washington, United States
- [Staff Product Designer](https://feeny.ai/job/staff-product-designer-brex-san-francisco-california-yybe8a4e2jnj) — San Francisco California, United States