Staff Offensive Security Engineer

Greenlight Financial Technology; United States; Hybrid; USD 165,000 - 200,000; Full time

Benefits offered by this job

Medical benefits

Dental & Vision

401k match

Unlimited PTO

Parental leave

Hybrid/Remote work

Professional development

Mental health resources

Equity rewards

Job summary

Greenlight is seeking a Staff Offensive Security Engineer to lead continuous security validation across consumer apps, cloud infrastructure, and internal environments. You will drive strategy, perform multi-stage adversary simulations, and research high-risk areas to prevent threats.

You will partner with DevOps to implement automated guardrails, support incident response, and mentor engineers, all while promoting a security-first culture across R&D.

Qualifications

• 8+ years of offensive security experience, with red team or pentest track record.
• Deep AWS security architecture knowledge, IAM bypass techniques, container escapes.
• Experience reviewing Node.js, Python, or Go code for security weaknesses.
• Ability to script in Python, Bash, or Go to automate testing in CI/CD.

Responsibilities

• Define the long-term offensive security vision and validation strategy.
• Design and execute complex red teaming and multi-stage simulations across cloud, mobile, and internal networks.
• Lead deep-dive vulnerability research into high-risk areas.
• Collaborate with DevOps to build automated security guardrails and self-healing infrastructure.
• Support detection and response with purple team exercises and improved monitoring.
• Mentor senior and mid-level engineers to foster security-minded development.

Skills

Expert-level Offensive Security

Cloud Native Security (AWS/Kubernetes)

Application Security & code review

Automation & scripting (Python/Bash/Go

Strategic communication with execs

OSCP/OSCE or GXPN

Ethical hacking mindset

Collaboration across R&D

Ownership mindset

Tools

AWS

Kubernetes

CI/CD tools

Job description

Greenlight is a family technology company on a mission to help families raise financially smart kids and navigate life together. Its suite of products — including the Greenlight app, debit card, Safe Family GPS trackers, and Family Hub — brings together financial tools, safety features, and everyday family management in one connected experience. Designed for busy families who want convenience without compromise, Greenlight continues to innovate alongside the evolving needs of modern life. Today, more than 6.5 million family members trust Greenlight to stay in sync.

At Greenlight, we’re here to make the day-to-day easier and futures brighter, so families can spend less time managing life, and more time living it. That’s why we get out of bed every morning.

Greenlight is looking for a Staff Offensive Security Engineer for our Security team. This individual will be responsible for the continuous offensive security validation across our consumer digital platforms, mobile applications, cloud infrastructure, internal corporate environments, and emerging hardware device lines. The Staff Offensive Security Engineer will drive the long-term technical strategy for offensive security, lead complex red teaming and multi-stage adversary simulations, manage deep-dive vulnerability research into high-risk areas, champion a culture of security-minded development across the R&D organization, and establish automated security guardrails and self-healing infrastructure within a fintech environment.

Your day-to-day:

• Lead Technical Strategy: Define the long-term vision for offensive security at Greenlight, moving beyond point-in-time testing to continuous security validation.
• Red Teaming & Adversary Simulation: Design and execute complex, multi-stage adversary simulations targeting our cloud infrastructure (AWS), mobile applications (iOS/Android), and internal corporate environments.
• Vulnerability Research: Conduct deep-dive research into high-risk areas of our ecosystem, identifying zero-day vulnerabilities or sophisticated logic flaws that automated tools miss.
• Pave the “Golden Path”: Partner with DevOps and Engineering to build automated security guardrails and “self-healing” infrastructure that prevents common attack vectors from being introduced.
• Incident Response Support: Work closely with the Detection and Response team to improve our monitoring capabilities by performing “purple team” exercises to validate alert coverage.
• Mentorship: Act as a force multiplier by mentoring senior and mid-level engineers, fostering a culture of security-minded development across the entire R&D organization.

What you’ll bring to the team:

• Expert-level Offensive Skills: 8+ years of experience in offensive security, red teaming, or penetration testing, with a proven track record of uncovering critical vulnerabilities in complex environments.
• Cloud Native Expertise: Deep understanding of AWS security architecture, including IAM bypass techniques, container escapes (Kubernetes), and serverless security.
• Application Security Depth: Experience with manual code review (Node.js, Python, or Go) and bypass techniques for modern web and mobile security controls.
• Automation Mindset: Ability to script in Python, Bash, or Go to automate exploitation chains or integrate security testing into CI/CD pipelines.
• Strategic Communication: The ability to translate complex technical risks into business impact for executive stakeholders while remaining a trusted peer to software engineers.
• Relevant Certifications (Optional but valued): OSCP/OSCE, GXPN, or equivalent demonstration of deep technical skill.
• An Ethical Hacker at Heart: You are curious, persistent, and think outside the box to find ways around traditional security controls.
• A Collaborative Partner: You believe that “breaking things” is only half the job; the real value is in helping the team build them back stronger.
• Owner Mindset: You take pride in your work and feel a deep sense of responsibility for the safety of our families and their finances.

Not sure this one’s for you? Don’t count yourself out. Show us what you’ve got and we’ll reach out if there’s a great fit.

Work perks at Greenlight:

• Medical, dental, vision, and HSA match
• Paid life insurance, AD&D, and disability benefits
• Traditional 401k with company match
• Unlimited PTO
• Paid company holidays and pop-up bonus holidays
• Professional development stipend
• Mental health resources
• 1:1 financial planners
• Fertility healthcare
• 100% paid parental and caregiving leave, plus cleaning service and meals during your leave
• Flexible WFH, both remote and in-office opportunities
• Fully stocked kitchen, catered lunches, and occasional in-office happy hours
• Employee resource groups

Our stance on salaries:

Greenlight provides a competitive compensation package with a market-based approach to pay and will vary depending on your location, experience and skill set. The total compensation package for this position will also include a discretionary performance bonus, equity rewards, medical benefits, 401K match, and more. Greenlight conducts continuous compensation evaluations across departments and geographies to ensure we are keeping our pay current and competitive.

The estimated base pay range for this position in (NY, CA, WA): $165,000-200,000

The estimated base pay range for this position in (CO): $165,000-185,000

Who we are:

It takes a talented team to aim for a mission like ours. We’re looking for people who ask “is it bold enough?” People who bring their real selves to the table and push the people around them to do the same. We win by never hesitating to jump in, offer a hand, or share the credit, because we know we’re stronger together than apart. And through all of it, the mission stays the thing we measure ourselves against: are we doing right by the families counting on us? If that sounds like your kind of team, we’d love for you to apply.

Greenlight is an equal opportunity employer and will not discriminate against any employee or applicant based on age, race, color, national origin, gender, gender identity or expression, sexual orientation, religion, physical or mental disability, medical condition (including pregnancy, childbirth, or a medical condition related to pregnancy or childbirth), genetic information, marital status, veteran status, or any other characteristic protected by federal, state or local law.

Greenlight is committed to an inclusive work environment and interview experience. If you require reasonable accommodations to participate in our hiring process, please reach out to your recruiter directly or email [e-mail]