Senior Security Engineer, Infrastructure

We're transforming the grocery industry At Instacart, we invite the world to share love through food because we believe everyone should have access to the food they love and more time to enjoy it together. Where others see a simple need for grocery delivery, we see exciting complexity and endless opportunity to serve the varied needs of our community. We work to deliver an essential service that customers rely on to get their groceries and household goods, while also offering safe and flexible earnings opportunities to Instacart Personal Shoppers.

Instacart has become a lifeline for millions of people, and we’re building the team to help push our shopping cart forward. If you’re ready to do the best work of your life, come join our table. Instacart is a Flex First team There’s no one-size fits all approach to how we do our best work.

Our employees have the flexibility to choose where they do their best work—whether it’s from home, an office, or your favorite coffee shop—while staying connected and building community through regular in-person events. Learn more about our flexible approach to where we work. Overview The CAPS team at Instacart is responsible for securing Cloud infrastructure, AI systems, and Product surfaces.

We work closely with all other engineering teams, enabling them to roll out new product features and internal productivity systems in a secure way. Members of the CAPS team assume ownership of security risks and find solutions that mitigate whole classes of vulnerabilities. About the Job Identify business-critical risks across Instacart's cloud accounts, identity stack, AI/agent platforms, and product services.

Define remediation strategies that scale: prefer guardrails and platform changes over one-off fixes. Build secure-by-default primitives — policy-as-code, paved-road infra modules, identity and access frameworks — that make the safe path the easy path for product teams. Operate the SaaS and internal security platforms that back those guardrails (CSPM, IAM governance, vulnerability management, AMI/image supply chain, secrets, audit) and extend them with internal tooling when off-the-shelf falls short.

Lead investigations, root-cause incidents and findings, and drive variant analysis across the codebase to make sure a class of bug is gone — not just one instance. Coach and mentor engineers across security and other functions.

Minimum Qualifications

5+ years in security engineering, with depth in at least two of: cloud security (AWS/GCP), identity access engineering, vulnerability management at scale, or secure infrastructure platform engineering. 3+ years of experience performing code reviews and design reviews. Proficiency in Python or TypeScript sufficient to build and maintain internal services (APIs, scanners, dashboards) — not just glue scripts.

Working knowledge of cloud IAM (roles, trust policies, federation, SCPs/org policies) and the attack paths it enables when misconfigured. Hands-on Infrastructure-as-Code experience (Terraform, CloudFormation, or equivalent). Experience driving a remediation program end-to-end: discovery → ownership routing → fix → measurement → prevention.

Understanding of SaaS architectures, common risks, and threat models. Experience with Variant Analysis, Root Cause Analysis, or Secure Frameworks.

Preferred Qualifications

Track record of security research, competitive hacking, or OSS contributions. Track record building internal security platforms that other engineers actually adopt — IAM attack-path analysis, vulnerability management, supply-chain/AMI pipelines, secrets management, GRC automation, or similar. Policy-as-code authoring at organization scope (OPA/Rego, Terraform Sentinel/equivalent) with disciplined test coverage and rollout/grandfathering strategies.