BrexEngineering

Staff Application Security Engineer

United StatesFull-timeStaff$240,000 – $300,000
Posted Aug 19, 2026Deadline: Keep Open
Job SnapshotActively hiring
LocationUnited States
Job typeFull-time
Salary$240,000 – $300,000
DeadlineKeep Open

Finjobsly Role Intelligence

Experience level
Staff
Work style
Not specified
Visa sponsorship
Not specified
Salary
$240,000 – $300,000
Key skills
PythonGoGraphQLAWSKubernetesData Engineering

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Company insights

58

Happiness score

58/100

Based on 20 verified employee signals

Capital One completes acquisition of Brex

Capital One completed its cash-and-stock acquisition of Brex on April 7, 2026. The deal was initially valued at $5.15 billion, with CEO Pedro Franceschi continuing to lead Brex.

2026From the webCapital One

Brex COO Camilla Matias steps down

Chief Operating Officer Camilla Matias left Brex after nearly eight years. She joined as head of finance in 2018 and became COO in January 2024.

mid-2026From the webFinTech Futures

Brex ships Spring 2026 accounting and card-management release

Brex launched ERP vendor creation, foreign VAT recovery integrations, Microsoft Dynamics 365 connectivity, customizable card programs and new vendor-management tools.

spring 2026From the webBrex

Brex reports first month of positive operating cash flow

CEO Pedro Franceschi said Brex grew 49% in August 2025 and was operating-cash-flow positive for the first time in the company's history.

late 2025From the webBrex

AI Generated Insights

Finjobsly Intelligence— Generated from the employer's job description

What you'll own

Lead the technical vision and roadmap for Application Security, set secure defaults across Brex’s engineering org, and architect security for AI/ML workflows while driving proactive vulnerability discovery.

What they're looking for

8+ years in application or product security with strong offensive/defensive expertise, deep AI security knowledge, systems‑thinking, and proficiency in Python or Go; proven technical leadership and mentorship experience.

Why this role matters

Securing Brex’s high‑velocity platform and AI services is critical to protect its global finance products, maintain trust with enterprise customers, and enable rapid, safe product delivery.

Best suited to

Seasoned security engineers who thrive on leading cross‑functional security initiatives, mentoring engineers, and tackling complex AI and cloud‑native threats.

About this role

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.

What you'll do

  • 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.

What they're looking for

  • 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.

Nice to have

  • 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 domain. Any outreach claiming to be from Brex via other sources should be ignored.

More about this role

About company

Required skills

PythonGoGraphQLAWSKubernetesData Engineering