Senior Security Engineer, Detection and Response

About Cape Cape is America’s privacy-first mobile carrier. Our mission is to be a force for good in global wireless. Cape was founded in 2022 by people who believe privacy is a fundamental right, not a luxury to be traded away. Our journey began when our founder recognized a critical vulnerability in our modern world: everyone relies on the same stagnant cellular infrastructure and legacy systems that track our every movement, monitor and profile our connections, and lose and sell our personal data. Instead of accepting the status quo, we decided to fix it. National security professionals, journalists, parents, and everyone in between can stay connected and have privacy. We didn’t just build a layer on top of old tech; we built America’s most private and secure mobile carrier from the ground up. By building our own network from scratch, we are able to design and build a suite of privacy and security features that no other carrier on the planet can offer. Today, Cape provides our secure network to consumers, businesses, and government agencies alike. We closed our Series C in March 2026, and we are scaling rapidly, with the goal of giving people back control of their most personal information. The Team At Cape, we are the architects of a privacy-centric movement that is just getting started. We are relentless builders, constantly innovating at the edge of what’s possible in telecommunications. We operate on a foundation of high trust and high expectations. As a member of our team, you will collaborate with world-class engineers, architects, and visionaries, and work across organizational lines to solve "impossible" problems and deliver mission-critical results for our users every single day. The Role We are seeking a seasoned Security Engineer with a specialization in detection and response to join our team. As a strategic partner, you will be responsible for designing, implementing, and maintaining security measures that comply with regulatory standards, enhance internal processes, and minimize data security risks. Through developing ongoing security strategies and technologies, you will support the organization's business objectives and daily operations. Responsibilities Design, implement, and manage robust security controls and policies across the business, enhancing our detection and response capabilities. Assist in addressing findings from automation and tooling, ensuring prompt and effective response and remediation. Run and manage detection tooling and automation across the organization Stay informed about the latest security threats, vulnerabilities, and compliance mandates affecting cloud environments, providing guidance on emerging technologies and security best practices. Offer expert guidance and mentorship to junior security team members and employees across the company, fostering an organizational culture of security awareness and continuous improvement. Collaborate with stakeholders to integrate security requirements effectively into IT projects and business initiatives. Preferred Experience Bachelor's degree in Computer Science, Information Security, or a related field (or equivalent experience), with advanced degrees or certifications (e.g., CISSP, AWS Certified Security Specialty) being advantageous. A minimum of 7 years of experience in information security, with at least 3 years concentrated on detection and response. Deep understanding of AWS architecture, security services, and best practices for securing cloud applications and data. Proficiency in using infrastructure as code (IaC) tools (like Terraform or AWS CloudFormation) and in automating security tasks within AWS. Skilled in scripting languages (Python, TypeScript, Go) for the automation of security tasks and the integration of security tools. Solid knowledge of network security, encryption technologies, and secure coding practices. Excellent analytical skills for identifying and mitigating complex security vulnerabilities and risks. Strong communication and leadership abilities, capable of working collaboratively across teams and effectively conveying technical information to non-technical stakeholders. Organized and able to manage multiple priorities in a dynamic, fast-paced environment. Competencies Role competencies Security Expertise : Experience running incidents. Knows how to run and optimize SIEMs for optimal detection and response capabilities. Understands the need for tooling and when it’s beneficial vs nice to have Analytical: Collects data and information; uses critical thinking to solve problems and make sound decisions. Collaboration & Teamwork: Builds partnerships with others to reach common goals. Able to share credit with coworkers, display enthusiasm and promote a friendly group working environment. Works closely with other departments as necessary, supports group decisions and solicits opinions from coworkers. Communication: Presents information through verbal and written communication; reads and interprets complex information; listens well. Develops and delivers multi-mode communications that convey clear understanding of unique audiences. Decision-Making: Acts quickly to solve problems and exercises good judgment by making sound and well-informed decisions. Perceives the impact and implications of decisions; makes effective and timely decisions, even when data is limited. Dependability/Self-Management: Possesses the personal discipline and diligence necessary to keep commitments and to complete tasks. Is accountable for actions and outcomes. Makes effort to improve situations without explicit instructions; a self-starter who consciously manages his/her own time and resources. Customer Centric : Values the importance of delivering high quality, innovative service to employees; understands the needs of the client; responds promptly and is accessible to them; follows through on commitments in a timely manner; maintains positive, long-term working relationships; assumes ownership of process issues and takes appropriate steps to mitigate problems. Gets consistently high feedback from stakeholders. Raises hand to help. Flexibility / adaptability : adjusts quickly to changing priorities, conditions, and challenges. Copes effectively with complexity and change. Is comfortable navigating ambiguity. Can handle business changes with ease and with a lack of frustration or feeling of defeat. Feels comfortable dealing with limited unknowns in an area they are well versed in. Planning & Organization – Manages multiple projects, determines project urgency in a meaningful and practical way, uses goals to guide actions, creates detailed action plans, and organizes tasks. Cape-specific competencies Do Excellent Work Respect The Opportunity (each other, the user) Overshare Bias Towards Action We offer competitive compensation that is geo-adjusted based on your location , along with meaningful equity so you share in the value you help create. Salary range for this role in New York, New York is $200,000-$255,000 depending on experience and interview performance. Our benefits include: 401(k) match 100% coverage of medical, dental, and vision premiums for you and your dependents 12 weeks paid parental leave (for all parents, no waiting period) Stipends for Family-forming needs Gender-affirming care Unlimited PTO Our Culture & Values We hire excellent people, give them outsized responsibility, and trust them to execute. Every person at Cape has a proven track record of tackling hard problems and winning. We believe that personal privacy and national security are not at odds, and that they can be reconciled through strong technology. We believe companies exist to build awesome things and take care of the people who build them, so we offer top-tier healthcare, 401(k) matching, and a generous vacation policy that our team actually uses to recharge. We believe that a stronger company and a better product are built by people from all walks of life. We hire without regard to race, color, ancestry, religion, sex, national origin, sexual orientation, gender identity, age, marital status, disability, or Veteran status. If you are great at what you do, you belong here. How to apply Click the link below to apply. We reserve the right to make use of any unsolicited resumes received from outside recruiting agencies and / or individual recruiters without being responsible for payment of any fees asserted from the use of unsolicited resumes.