# Principal Security Engineer, Detection & Response

Hiring organization: [Circle](https://career.thegoodapps.co/organizations/circle)

Canonical page: https://career.thegoodapps.co/jobs/33b135ae-2b08-488a-b43b-9233f81aea91

Listed on Circle's own careers site. Applications go to them directly.

- Seniority: Principal
- Salary: 110000 – 170000 EUR per year

## Summary

Circle seeks a seasoned security leader to build detection and response capabilities across blockchain, cloud infrastructure, and AI systems. This role is for an experienced engineer who can architect and implement security solutions at scale across three critical threat surfaces while supporting incident response and on-call operations.

_Our summary, not Circle's wording._

## Skills named

Amazon EKS, Amazon Web Services (AWS), macOS, Python, Slack

## Required

- 10+ years in detection, response, or security engineering
- 3+ years commanding security incidents involving engineering
- Deep AWS cloud security knowledge including IAM, identity federation, KMS, EKS, and container attack patterns
- Working knowledge of blockchain and crypto-native threats including wallet and custody attack patterns
- Hands-on experience with AI tooling and understanding of organizational AI risks
- SIEM, Case Management, and SOAR platform knowledge
- macOS operating system and file system knowledge
- Python, Golang, or similar programming experience
- Detections As Code experience
- Ability to work across teams during high-stress situations including after-hours work
- On-call availability every third week plus occasional weekends

## Nice to have

- GCP or OCI exposure
- Direct experience defending blockchain, custody, or DeFi infrastructure
- Strong understanding of smart contract abuse patterns and protocol-level risks

Apply on Circle's site: https://circle.wd1.myworkdayjobs.com/en-US/Circle/job/Dublin---remote-first-in-Ireland/Principal-Security-Engineer--Detection---Response_JR101051