Principal Security Engineer, Detection & Response

Circle
Ireland
Workplace: RemoteFull timeEUR 110,000 - 170,000 annuallyFunction: CybersecuritySkills: ["Collaboration","Judgment","Problem-solving","Independence","Communication"]

Lead detection and response across Circle’s highest-stakes surfaces: blockchain/custody environments, cloud-native infrastructure on AWS/EKS, and AI tooling used internally and shipped in product. Build detections for crypto-native and cloud attacks, advance AI-assisted SOC workflows, and develop core security tooling plans (SIEM and orchestration). Investigate and resolve incidents, collaborate with teams on visibility and threat modeling, and participate in on-call rotations.

Loading

Loading job details...

Preparing the role view and application actions.

FursaFursa
Circle
Circle
2 months ago

Principal Security Engineer, Detection & Response

✓ Verified Job

Canonical indexed version, validated from employer's careers page.

Source: Company careers pageValidated by: Fursa AI
Last checked: 18 hours agoStatus: Live
Reposted: similar role first listed 2 months ago

Job Summary

Lead detection and response across Circle’s highest-stakes surfaces: blockchain/custody environments, cloud-native infrastructure on AWS/EKS, and AI tooling used internally and shipped in product. Build detections for crypto-native and cloud attacks, advance AI-assisted SOC workflows, and develop core security tooling plans (SIEM and orchestration). Investigate and resolve incidents, collaborate with teams on visibility and threat modeling, and participate in on-call rotations.
Location: Ireland
Workplace: Remote
Employment Type: Full time
Job Function: Cybersecurity
Seniority: Mid level

Key Responsibilities

  • •Proactively identify and respond to emerging security threats across cloud, endpoint, blockchain, and AI surfaces.
  • •Build detection and response capability for blockchain/crypto-native threats including custody-vault interactions, wallet abuse, smart contract exploitation, and protocol-level attackers.
  • •Develop detection coverage for cloud-native attacks across AWS + EKS, including IAM compromise, identity federation abuse, lateral movement, runtime exploitation, and misconfiguration drift.
  • •Extend SOC capabilities by advancing AI deployment for detection triage, enrichment, and analyst-acceleration workflows.
  • •Lead incident response and collaborate cross-team to investigate and resolve incidents while improving tooling (SIEM/orchestration), visibility via logging, and security guidance; take on-call shifts.

Pay and Benefits

Salary: EUR 110,000 - 170,000 annually

Key Requirements

  • •10+ years of experience in detection, response, or security engineering.
  • •3+ years of experience commanding security incidents, especially those involving engineering.
  • •Deep cloud security knowledge in AWS environments including IAM, identity federation, KMS, EKS/container attack patterns, runtime exploitation, and CSPM (e.g., Wiz).
  • •Working knowledge of blockchain and crypto-native threats, including wallet and custody attack patterns, on-chain monitoring, protocol-level risks, and smart contract abuse.
  • •Hands-on experience using AI tooling for acceleration and threat defense, plus programming experience in Python, Golang, or similar languages.
Experience:BlockchainCryptoSecurity operationsCloud securitySOC
Skills:CollaborationJudgmentProblem-solvingIndependenceCommunication
Tech Stack:AWSEKSIAMIdentity federationKMSCSPMWizSIEMSOARCase ManagementOrchestrationPantherTinesBlockchainSmart contractsOn-chain monitoringPythonGolangSlackApple macOS

Company Brief

Circle
Provides blockchain-based financial infrastructure and stablecoins (notably USDC and EURC) and payment solutions for enterprises, developers, and financial institutions to enable programmable money and global payments.
Industry: Fintech Infrastructure
Company Size: Large (251 to 1,000 employees)
Revenue: USD 1B+
Growth: Public Company
Valuation: Public Company (Market Cap in USD)
Funding: IPO / Publicly Listed
Headquarters: New York City, United States
Founded: 2013
Glassdoor
Glassdoor: 4.1
WebsiteLinkedInGlassdoor