---
title: 'Security Engineer, Detection & Response at Brain Co.'
canonical: 'https://feeny.ai/job/security-engineer-detection-response-brain-co-san-francisco-9vmcqadw0r0v'
type: 'job'
last_seen: '2026-10-21'
---

# Security Engineer, Detection & Response at Brain Co.

- **Company:** Brain Co.
- **Location:** San Francisco, CA
- **Employment:** full-time
- **Work type:** hybrid
- **Posted:** 2026-10-14
- **Last confirmed live:** 2026-10-21
- **Apply:** https://jobs.ashbyhq.com/brainco/962d81f4-ca91-4f9c-ae9b-21842d673672

## Job description

## Our Mission

Rebuild how the world works, to make institutions work better for the people they serve.

About Brain Co. Brain Co. builds AI-native operating systems for large, regulated institutions. Each system is built for a specific industry, powered by agents that push real workflows forward. Underneath it all is Atlas, our proprietary platform that keeps customers in control, secure by design, and never locked into one model.

## Why Now

Brain Co. is entering its next phase of production deployments on a national scale with an elite team built from Palantir, Google, Meta, and Nvidia, and a growing footprint across government, insurance, health, and financial services. Joining now means shaping both the company and a new category of applied AI. Every project here ships to production and is expected to create measurable customer value and impact. You'll work alongside exceptional peers on some of the hardest problems in applied AI. It’s the kind of work you'll still be proud of in ten years from now.

## About the Role

We are looking for a Security Engineer, Detection & Response to build and operate our detection and response capabilities as Brain Co. expands. Reporting directly to the Head of Security, you will partner closely with engineering, infrastructure, infrastructure security, IT, and operational teams to protect our environments and respond effectively to security incidents. This is an engineering-focused builder role rather than a passive alert-monitoring position. You will strengthen our security posture from the ground up: designing high-signal detections, automating triage and investigation workflows, leading cross-functional incident response, and converting incident findings into safer engineering defaults across the company. The program is early enough that your judgment will shape the tooling, workflows, metrics, and operating model—not just the alerts you investigate. You will have significant autonomy to improve signal quality, streamline integrations, and turn incident lessons into stronger engineering defaults across the organization.

## What You’ll Build & Own

- Design, build, and maintain automation, playbooks, and systems for timely triage, investigation, and incident response, using sound software engineering practices and modern AI tools where they add value.
- Develop and refine high-signal detections so security findings are actionable and noise is minimized.
- Integrate security telemetry and tooling across our cloud and application stack to enable consistent investigation and self-service triage.
- Lead cross-functional incident response across applications, cloud infrastructure, endpoints, identity, and internal services.
- Translate incident data and response metrics into secure-by-design improvements alongside product and infrastructure teams.
- Continuously evaluate response procedures and partner across engineering, infrastructure security, IT, and operational teams to close gaps and improve the operating model.

## What We’re Looking For

- Demonstrated capability in security engineering, detection engineering, or incident response.
- Hands-on experience investigating security incidents or suspicious behavior in complex environments.
- Practical experience with EDR, SIEM, SOAR, log-management, or equivalent detection-and-response tooling.
- Ability to write code and build software automation or detections in at least one relevant scripting or query language.
- Strong understanding of modern cloud infrastructure and SaaS security principles.
- Sound risk-based judgment when prioritizing threats and operational tasks.
- Ability to make sound, timely decisions with incomplete information during active incidents.
- Clear communication and cross-functional collaboration skills during high-pressure situations.

## Preferred Experience

- Building self-serve security triage automation or AI-assisted response capabilities.
- Threat hunting, digital forensics, threat intelligence, or infrastructure-as-code security controls.
- Investigating complex security events within containerized or Kubernetes-based cloud environments.
- Translating security incident trends into architectural or systemic engineering improvements.
- Experience navigating security challenges in fast-paced, high-growth startup environments.

On-Call Expectation This position includes participation in a regular on-call rotation to support rapid response to critical security incidents and maintain operational resilience.

## Equal Opportunity and Accessibility

Brain Co. is an equal opportunity employer. We make employment decisions without regard to race, color, religion, sex, national origin, age, disability, genetic information, or any other status protected by applicable federal, state, or local law. We provide reasonable accommodations for applicants and employees with disabilities or sincerely held religious beliefs - contact talent@braincompany.ai to request one.

Ready to build with us?

## About Brain Co.

## Company Overview
- **One-liner**: Brain Co. builds applied AI platforms and applications that automate complex, manual workflows for the world’s most important institutions, turning permitting, insurance, supply chain, and patient-care processes from months-long bottlenecks into minutes-long transactions.
- **Entity Type**: Private (Series A)
- **Headquarters**: San Francisco, California, United States (also offices in the United Arab Emirates, United Kingdom, and Spain)
- **Founded**: 2024 (founding conversation in February 2024; public launch in 2025)
- **Founders**: Jared Kushner, Dan Ashton (CEO), Elad Gil, Dr. Luis Videgaray, Eric Wu, Mircea Pasoi, Revant Kapoor

## Core Business
- **Primary industries**: Artificial intelligence, government technology, healthcare, insurance, energy, hospitality, supply chain logistics
- **Target customers**: Global 2000 enterprises, federal/state governments, large healthcare systems, insurance carriers (B2B / Enterprise)
- **Mission or purpose statement**: “Empower the world’s most important institutions to create an abundant AI future” and “reinvent the broken processes that hold governments and institutions back.”

## Products & Services
- **Permitting**: Automates construction and other permitting workflows, cutting the process from months to minutes (claims 99% faster, $375M+ unlocked annually). SaaS / AI workflow platform.
- **Specialty Insurance**: Cuts complex underwriting and adjusting workflows from hours to minutes. AI-powered decision engine.
- **Supply Chain**: Optimizes end-to-end supply chain operations, delivering 30% lower cost, 99% reliability, and mitigating $100M+ in lost revenue. Integrated AI platform.
- **Patient Pathways**: Automates patient care-path management, returning patients to optimal care faster. Healthcare AI application.
- **General AI Platform**: An underlying platform that automatically incorporates advances in foundation models, enabling applications to stay current without traditional re-development.

## Market Standing
- **Valuation/Market Cap**: Not publicly disclosed (private company; Series A at $30M raised)
- **Key Metric**: $30 million total funding (Series A, led by Elad Gil and Affinity Partners, announced October 2025)
- **Notable Investors/Partners**:
  - Lead investors: Elad Gil (Gil Capital), Affinity Partners
  - Strategic partner: OpenAI
  - Angel investors include Ali Ghodsi (CEO Databricks), Andrej Karpathy, Aravind Srinivas (CEO Perplexity), Brian Armstrong (CEO Coinbase), Kevin Weil (CPO OpenAI), Reid Hoffman, Patrick Collison (CEO Stripe), Sarah Guo (Conviction), and many more.
- **Growth Signals**:
  - Headcount: 73 employees (LinkedIn, June 2026), monthly growth of +20.2%, quarterly job posting growth +47.4%
  - 10+ Global 2000 customers and multiple government engagements
  - $375M+ annual value unlocked in permitting alone; $100M+ supply chain revenue loss mitigated
  - Strategic partnership with OpenAI for model access and co-innovation
  - Engineering talent sourced from Stripe, Palantir, Amazon, Adobe, Roblox, and Alchemy

## Competitive Advantages
- **Outcome-based pricing**: Revenue model tied to client results, not software licenses – clients pay based on value delivered.
- **Production deployment, not pilots**: Every engagement begins with a value case; solutions go straight into production.
- **Domain-expertise embedded**: Subject matter experts in each vertical (government, insurance, healthcare) work alongside AI engineers to build around specific rules, regulations, and workflows.
- **Future-proof AI**: Applications automatically incorporate new capabilities from foundation models as they are released, avoiding obsolescence.
- **Enterprise-grade security**: SOC 2 and HIPAA-ready infrastructure with hallucination controls and guardrails.

## Strategic Focus
- Scale the platform across additional government and enterprise verticals (e.g., energy, hospitality)
- Deepen the partnership with OpenAI to rapidly leverage newest model capabilities
- Expand headcount (28 active job postings, especially in AI engineering, infrastructure, security, and deployment)
- Extend presence in the Middle East (Qatar, UAE) and Europe (UK, Spain)
- Continue building a new software-development paradigm where applications auto-update with AI advances

## Why Work Here
- **Culture**: “World-class talent built to deliver applied AI in production.” The team includes engineers from Tesla, NVIDIA, DeepMind, and top tech companies. Emphasis on solving hard, high-impact problems for the largest institutions.
- **Remote/hybrid/office**: Not explicitly stated, but headquarters in San Francisco with distributed teams in UAE, UK, and Spain. Likely a hybrid or office-first model given the nature of client engagements.
- **Notable perks or engineering culture**:
  - Outcome-driven work: every project tied to measurable value cases
  - Direct partnership with OpenAI and access to cutting-edge models
  - High-caliber co-founders (Kushner, Gil, Videgaray, Wu) and leadership (Marne Levine, former COO Instagram/Meta)
  - Rapidly growing (~73 people, +20% monthly headcount growth) – offers early-stage ownership
  - Roles span AI platform engineering, agentic systems, infrastructure, security, and deployment consulting

## Sources
1. [brain.co](https://brain.co/) – Main site overview
2. [brain.co](https://brain.co/blog/introducing-brain-co-9gk9a) – Introducing Brain Co. blog post (funding, founders, investors, customers)
3. [braincompany.ai](https://braincompany.ai/about) – About page (team, approach, security)
4. [linkedin.com](https://www.linkedin.com/company/brainco-ai/jobs) – LinkedIn company page (headcount, growth, job postings, talent sources)
5. [jobs.ashbyhq.com](https://jobs.ashbyhq.com/brainco/) – Careers page (open positions)

## Other roles at Brain Co.

- [AI Product Engineer, 2027 New Grad](https://feeny.ai/job/ai-product-engineer-2027-new-grad-brain-co-san-francisco-bmk4rke9vkc4) — San Francisco, CA
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- [AI Platform Engineer Co-Op Intern, Winter 2027](https://feeny.ai/job/ai-platform-engineer-co-op-intern-winter-2027-brain-co-san-francisco-kp0p14kewgt0) — San Francisco, CA
- [Machine Learning Engineer, Applied AI Co-Op Intern, Winter 2027](https://feeny.ai/job/machine-learning-engineer-applied-ai-co-op-intern-winter-2027-brain-co-san-zryx6b3070na) — San Francisco, CA
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