About this opportunity
CipherData lists this Security Engineer opportunity in bellevue, Washington. Review the employer’s description below for duties, qualifications and application requirements.
Job description
About the Role
AIDR's agents investigate every alert autonomously. Your job is to make sure they investigate the right things, the right way. You will build the detection and correlation content our agents reason over, label the real investigations that tell us whether their conclusions are correct, and work inside customer SOCs while AIDR runs in production.
This is a product role, not a corporate security or compliance role. You are joining our founding security team — you will work directly with the AI engineering team and with the engineer who leads our security function, and you will see your detection work go from idea to customer environment in days. We will level this role to the person: a strong engineer with a few years of hands‑on SOC or detection work will grow fast here; a senior engineer will own large pieces outright.
What You'll Do
Detection and correlation engineering: Write, test, tune, and retire the detection logic and correlation rules that turn multi‑vendor security data into signal our agents can reason over.
Ground truth: Label real investigations into the benchmark datasets that measure whether agent output is right; find and document the cases where it is confidently wrong.
Threat research: Track attacker tradecraft and turn it into detection content, test cases, and agent capability.
Security lakehouse: Contribute to normalization, enrichment, and query patterns on our SIEM‑less security lakehouse as we expand it.
Customer SOC work: Help deploy, tune, and validate AIDR in customer environments and carry analyst feedback back into detection and evaluation.
Incident response: Participate in customer‑reported and internal incident response, including analysis, documentation, and post‑incident review.
Our Core Values
Five principles guide every decision at CipherData. We hire against them and evaluate against them:
Trustworthiness — be trustworthy to all people. Integrity, transparency, and dependability with colleagues, partners, and customers.
Growth Mindset — learn from anything, anyone, anytime. Past experience is data, not dogma. Curiosity over ego; first principles over status quo.
Proactive Ownership — do the right thing for the customer. Customer first, then company, then team, then self. Step beyond your role and hold yourself accountable.
Disagree and Commit — debate when it matters, execute with unity. Challenge high‑impact decisions with data and conviction, regardless of title. Once decided, commit fully.
Impact‑Driven Execution — ship, learn, iterate. Move fast, take calculated risks, and measure yourself by outcomes, not activity.
Minimum Qualifications
3+ years hands‑on in a SOC, detection engineering, threat hunting, or incident response role
You have written and tuned detections in production and can explain the false‑positive trade‑offs you made
Working experience with at least one SIEM or security data platform and EDR/XDR telemetryli>
Working Python; comfortable in a codebase with code review, tests, and CI
Comfort with ambiguity and ownership at an early‑stage startup: you scope your own work, ask for help early, and ship
Preferred Qualifications
5+ years, including senior‑level detection engineering or IR (we will level and title accordingly — Senior Security Engineer)
Detection‑as‑code practice
Cloud and identity telemetry depth
Experience building labeled datasets or evaluations
Familiarity with LLM‑based systems and their failure modes
Purple team, adversary emulation, or offensive security background
Details
Position: Security Engineer / Senior Security Engineer, Detection & Response (leveled to experience)
Experience: 3+ years
Employment type: Full‑time
Location: Bellevue, WA
CipherData is an equal opportunity employer. We consider all qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status, or any other protected characteristic.
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Worksite address
bellevue, WA, 98009, US
Who can apply
Review the original listing for work authorization, qualifications and employer requirements.