Senior Security Engineer

At Keystone AI, we’re building a world where value moves like information does today. It’s big, it’s bold, and we’re already doing it. Through our crypto solutions for financial institutions, businesses, governments and developers, we are improving the global financial system and creating greater economic fairness and opportunity for more people, in more places around the world. And we get to do the best work of our career and grow our skills surrounded by colleagues who have our backs. If you’re ready to see your impact and unlock incredible career growth opportunities, join us, and build real world value. THE WORK: As a Senior Security Engineer focusing on anti-abuse and threat intelligence, you will lead the design and development of systems and automation to detect, mitigate, and prevent threats targeting Keystone AI’s staff, products, and users. This includes identifying and advising on Advanced Persistent Threats (APTs) targeting the crypto ecosystem, phishing campaigns, impersonation attempts, and social engineering campaigns across web, mobile, and social platforms. You will collaborate closely with Legal, Communications, Brand Security, and third-party vendors to build a scalable and proactive threat intelligence capability. WHAT YOU’LL DO: Operationalize threat intelligence: Develop systems to detect and disseminate intelligence on threats impacting Keystone AI and Keystone AI customers. Automate intelligence sharing: Build tooling, workflows and AI agents to streamline the integration and interpretation of intelligence across Keystone AI orgs. Analyze attack patterns: Investigate attacker infrastructure and threat trends to advise proactive defenses. Develop internal visibility tools: Create dashboards and alerts to supervise threat detection and public awareness on emerging threats. Assist with incident response: Assist in investigations for sophisticated abuse cases and help implement long-term preventative measures. Guide strategy: Advise on threat intelligence standard methodologies, tooling decisions, and vendor integrations to improve Keystone AI’s external security posture. WHAT YOU'LL BRING: 5+ years of experience working within a security, abuse prevention, or threat detection domain, ideally with exposure to large-scale platforms, FinTech, or crypto environments. Proficiency in Python, Go, or similar languages for building automation and detection systems. Experience investigating cyber threats, phishing, impersonation, or abuse at scale - ideally in FinTech, crypto, or social platforms. Ability to analyze attack trends, extract insights, and drive detection improvements through data. Familiarity with abuse reporting and enforcement APIs (e.g., threat intelligence feeds, social platforms, domain registrars). Strong communication skills and an ability to tailor them to various technical/non-technical audiences. Passion for stopping bad actors and building trust in crypto ecosystems. Above all, a teammate that can handle ambitious situations, a rapidly maturing security culture, and an eagerness to mentor less expert engineers Other common names for this role: Senior Threat Intelligence Engineer, Senior Trust & Safety Engineer WHO WE ARE: Do Your Best Work The opportunity to build in a fast-paced start-up environment with experienced industry leaders A learning environment where you can dive deep into the latest technologies and make an impact. A professional development budget to support other modes of learning. Thrive in an environment where no matter what race, ethnicity, gender, origin, or culture they identify with, every employee is a respected, valued, and empowered part of the team. In-office collaboration for moments that matter is important to our culture, and we give managers and teams the flexibility to decide which 10+ days a month they come in. Bi-weekly all-company meeting - business updates and ask me anything style discussion with our Leadership Team We come together for moments that matter which include team offsites, team bonding activities, happy hours and more! Take Control of Your Finances Competitive salary, bonuses, and equity Competitive benefits that cover physical and mental healthcare, retirement, family forming, and family support Employee giving match Mobile phone stipend Take Care of Yourself R&R days so you can rest and recharge Generous wellness reimbursement and weekly onsite & virtual programming Generous vacation policy - work with your manager to take time off when you need it Industry-leading parental leave policies. Family planning benefits. Catered lunches, fully-stocked kitchens with premium snacks/beverages, and plenty of fun events Benefits listed above are for full-time employees. Keystone AI is an Equal Opportunity Employer. We’re committed to building a diverse and inclusive team. We do not discriminate against qualified employees or applicants because of race, color, religion, gender identity, sex, sexual identity, pregnancy, national origin, ancestry, citizenship, age, marital status, physical disability, mental disability, medical condition, military status, or any other characteristic protected by local law or ordinance. Please find our UK/EU Applicant Privacy Notice and our California Applicant Privacy Notice for reference.