Senior Security Engineer

Range•McLean, VA

About The Position

Range is building AI-powered wealth management that actually works, offering a single platform for investments, taxes, retirement, and estate planning. We are a hyper-growth startup with a small team where every person matters. We are looking for a senior security engineer who will be responsible for keeping our members' financial lives safe by probing our AI systems, infrastructure, and applications for weaknesses. This role involves working directly with engineers to fix identified issues, closing gaps in threat detection and response, and exploring new attack surfaces introduced by AI, such as training pipelines, inference systems, and model architectures. The security engineer will also help build automated tools, contribute to security program measurement, and foster security awareness within the engineering team. At Range, security engineers are builders, not gatekeepers.

Requirements

6+ years of professional security engineering experience
Deep hands-on experience with offensive security: red teaming, penetration testing, or vulnerability research
Experience assessing cloud infrastructure security, preferably AWS (EC2, ECS, RDS, S3, IAM, and similar)
Ability to develop custom tools and automation for security testing (Python, Go, or similar)
Experience analyzing and exploiting web application vulnerabilities
Strong understanding of threat actor techniques, tactics, and procedures
Bachelor's degree in Computer Science, Cybersecurity, or a related field, or equivalent practical experience

Nice To Haves

Experience with AI/ML system security: training pipelines, inference systems, model architectures
Familiarity with AI-specific attack vectors such as prompt injection, model poisoning, or data extraction
Fintech or financial services security experience
Experience building security metrics and reporting frameworks
Startup experience
Relevant certifications (OSCP, OSCE, GXPN, or similar)

Responsibilities

Think like an attacker to build like defenders.
Probe AI systems, infrastructure, and applications for weaknesses.
Work directly with engineers to fix identified security issues.
Close gaps in threat detection and response.
Figure out AI-specific threats for a fintech company and develop mitigation strategies.
Build automated tools to scale security testing.
Contribute to measuring security as a program.
Help the engineering team raise their security instincts.
Translate technical security findings into clear, actionable recommendations for engineering teams.

Benefits

100% employer-covered medical insurance for employees (75% for dependents)
Dental coverage
Vision coverage
401(k) retirement savings program
Paid Time Off
Most federal holidays
Comprehensive parental leave policy
Select meals covered throughout the week
Monthly movement stipend
Early exercise eligibility for equity
Strong focus on professional development
Annual compensation reviews for salary and equity refreshes
Boomerang Program (opportunity to take time off to start own company and return)