[Remote] Security Engineer

Note: The job is a remote job and is open to candidates in USA. Five9 is a leading provider of cloud contact center software. The company is seeking a Security Engineer to own incident response, detection engineering, response automation, threat intelligence, threat hunting, and AI-assisted development for its security triage pipeline.

Responsibilities

• Incident response. Own incidents end to end: scoping, containment, forensics, write-up, and remediation follow-through
• Detection engineering. Write, tune, test, and retire detections. Detection content is version controlled, reviewed, and measured on outcomes rather than alert volume
• IR automation. Build playbooks, integrations, and workflows that remove repeated manual steps from the response process. This is a large part of the role
• Threat intelligence. Track activity relevant to our environment and convert it into detections, hunts, and hardening work
• Threat hunting. Be a contributor to our hypothesis-led threat hunting initiatives
• AI-assisted development. Build and improve the agents, prompts, and enrichment logic behind the triage pipeline
• Alert triage. A limited amount: escalations the pipeline surfaces, plus the feedback that improves it

Skills

• Hands-on security operations experience, including incidents you can walk through in detail
• Proficiency in at least one scripting language (Python or equivalent) and a preference for solving recurring problems with code
• Working knowledge of detection logic, log pipelines, and modern telemetry sources: EDR, identity, cloud, network, and SaaS
• Ability to take an ambiguous problem, define what done looks like, build it
• Clear written communication: incident timelines, design notes, and postmortems
• GCP and/or AWS experience, including cloud logging, IAM, and cloud-specific failure modes
• Low-code automation platforms such as Tines or n8n, and judgment about when a workflow should become production code
• Agent programming and prompt engineering, specifically LLM tooling reliable enough for operational use
• Experience with AI-enriched detection or triage pipelines

Benefits

• Health, dental, and vision coverage, beginning on the first day of employment. Five9 covers 100% of the employee portion of the health, dental and vision coverage and shares a high portion of the dependent cost.
• Short & Long-Term Disability
• Basic Life Insurance
• 401k saving plan with employer matching
• Access to an innovative mental health support platform that offers personalized care and resources in areas such as: therapy, coaching and self-guided mindfulness exercises for all covered employees and their covered dependents.
• Generous employee stock purchase plan.
• Paid Time Off
• Company paid holidays
• Paid volunteer hours
• 12 weeks paid parental leave
• Annual performance bonus, stock, and/or other applicable incentive compensation plans may also be included in the total compensation package.
• Fully remote for candidates who reside outside the 30 mile radius of one of our offices.
• Hybrid work requiring 3 days a week (T, W, TH) in office for candidates who reside within a 30 mile radius of one of our offices.

Company Overview

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