SpaceXSI is seeking an Application Security Engineer focused on protecting the security and integrity of payments and financial products throughout the software development lifecycle. In this onsite Washington, DC role, you will help strengthen controls for code security, CI/CD pipeline security, threat modeling, and vulnerability management, with support from security tooling such as SBOMs and agentic or LLM-based solutions.

What you’ll do

Perform in-depth code reviews and static analysis to identify and mitigate security vulnerabilities in financial applications
Design and implement secure coding guidelines and best practices for development teams
Work with development teams to embed security practices into the CI/CD pipeline
Conduct threat modeling and risk assessments for payments, wallets, ledgers, and related product surfaces, including mitigations for fraud, abuse, and unauthorized movement of funds or credits
Oversee vulnerability tracking and remediation, providing guidance to development teams
Manage the bug bounty program, including intake, triage, researcher communication, and coordinated disclosure
Support application security incident response activities
Monitor emerging threats targeting financial and cloud-native systems and continuously improve controls
Evaluate and secure software supply chains, producing and maintaining Software Bills of Materials (SBOMs)
Design and implement agentic and LLM-based solutions to help detect, investigate, or prevent security problems

Required qualifications

Bachelor’s degree in Computer Science, Cybersecurity, or a related field
3-5 years of experience in application security, with a strong focus on code security practices
Experience in payments, money transmission, digital wallets, or related financial platforms
Deep understanding of secure coding practices, application security frameworks, and common vulnerabilities (including OWASP Top 10)
Proficiency in Python or Rust with secure coding practices in these languages
Experience securing CI/CD pipelines and implementing DevSecOps practices
Familiarity with software supply chain security and SBOM generation tools
Experience with security testing tools such as Burp Suite and OWASP ZAP, plus static and dynamic code analysis
Experience securing payments, wallets, ledgers, or other high-value transaction systems, including controls against fraud, abuse, and integrity issues
Experience designing and implementing agentic and LLM-based solutions for security problems
Excellent communication skills to explain complex security issues to technical and non-technical audiences

Technologies

Python, Rust
OWASP Top 10
Burp Suite, OWASP ZAP
SBOMs, SBOM generation tools
DevSecOps
Agentic solutions, LLM-based solutions
CI/CD pipelines

Compensation and benefits

USD 100,000 - 258,000 per yearly salary range. Base salary is part of a total rewards package that includes equity, comprehensive medical, vision, and dental coverage, access to a 401(k), short & long-term disability insurance, life insurance, and various other discounts and perks.

Preferred skills and experience

Hands-on experience securing applications on AWS (other cloud platforms are a plus)
Relevant security certifications (e.g., BSCP, OSCP, OSWE)
Experience managing bug bounty programs
Background in data privacy and compliance relevant to financial products and cloud-native applications
Experience with GitOps and infrastructure-as-code security
Experience building custom security tooling to enhance and automate security processes
Contributions to open-source security projects or tools

ITAR requirements

To conform to U.S. Government export regulations, applicants must be a (i) U.S. citizen or national, (ii) U.S. lawful, permanent resident (green card holder), (iii) Refugee under 8 U.S.C. § 1157, or (iv) Asylee under 8 U.S.C. § 1158, or be eligible to obtain the required authorizations from the U.S. Department of State. Learn more about the ITAR here.

Application Security Engineer