Security Engineer II, Detection and Response

About Circle

Circle (NYSE: CRCL) is one of the world’s leading internet financial platform companies, building the foundation of a more open, global economy through digital assets, payment applications, and programmable blockchain infrastructure. Circle’s platform includes the world’s largest regulated stablecoin network anchored by USDC, Circle Payments Network for global money movement, and Arc, an enterprise‑grade blockchain designed to become the Economic OS for the internet.

Enterprises, financial institutions, and developers use Circle to power trusted, internet‑scale financial innovation.

• Proactively identify and respond to emerging security threats.
• Advance deployment of AI to SOC function.
• Help manage core tooling, such as SIEM and orchestration platforms.
• Identify gaps in our infrastructure and work with business partners to gain visibility through logging and detection.
• Respond to incidents and collaborate across teams to investigate and resolve.
• Develop detection techniques to identify anomalous behaviors and attacks across the environment.
• Support broader security team projects such as threat modeling, vulnerability scanning, audits, and custom tool building.
• Take on‑call shifts and provide support during evening, night, and weekend incidents.

• Strong ability to work collaboratively across teams during high‑stress situations, including after‑hours work.
• Ability to manage multiple competing priorities and use good judgment to establish order of priorities on the fly.
• Self‑motivated and creative problem‑solver able to work independently with minimal guidance.
• Experience/familiarity with Slack, Apple macOS, and G Suite.
• 2+ years of experience in detection, response, or security engineering.
• Experience working security incidents, especially those involving engineering.
• Experience working in an AWS+EKS environment.
• Hands‑on experience using AI tooling to accelerate work and address threats, with an understanding of organizational risks AI introduces and strategies to defend against them.
• Knowledge of operating systems, file systems, and memory on macOS.
• Programming experience in Python, Go, or similar languages.
• Professional or hobbyist blockchain exposure is preferred.

• View Security Detection & Response as a data and engineering problem.
• Exude positivity and are not afraid to share ideas.
• Meet problems head‑on and view them as opportunities.
• Are self‑reliant, motivated, and communicate fearlessly.

Starting pay is determined by relevant experience, skill set, qualifications, and other business and organizational needs. Base Pay Range: $122,500 – $165,000.

We are an equal‑opportunity employer and do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. Circle participates in the E‑Verify Program in certain locations, as required by law. If you require accommodations or assistance in our interview process because of a disability, please reach out to