Senior Enterprise Security Engineer
WFA Digital Insight
Thumbtack’s Security Engineering team is tackling a unique challenge: securing the AI‑driven workflows that now power much of the company’s internal operations. Unlike traditional security roles that focus on perimeter defenses, this position digs deep into identity management for non‑human agents, the safe orchestration of autonomous tools, and the data pipelines that feed AI models. Candidates will be expected to design reusable security guardrails that let product teams move quickly while keeping data and access tightly controlled. The role sits at the intersection of security architecture and emerging AI technology, offering a chance to shape how a fast‑growing consumer platform balances innovation with trust.
Job Description
THUMBTACK HELPS MILLIONS OF PEOPLE CONFIDENTLY CARE FOR THEIR HOMES. Thumbtack is the one app you need to take care of and improve your home — from personalized guidance to AI tools and a best-in-class hiring experience. Every day in every county of the U.S., people turn to Thumbtack to complete urgent repairs, seasonal maintenance and bigger improvements. We help homeowners know which projects to do, when to do them and who to hire from our growing community of 300,000 local service businesses. If making an impact inspires you, join us. Imagine what we’ll build together. ABOUT THE CYBERSECURITY TEAM The Security Engineering team at Thumbtack is focused on enabling innovation at scale by making the secure path the easiest path. We believe strong security is not a blocker to velocity, but a force multiplier when it is designed into systems, platforms, and developer workflows from the start. We partner closely with teams across the organization to shape system design, guide architectural decisions, and evolve Thumbtack’s security posture as the company scales. Through collaboration, automation, and thoughtful tradeoffs, we help ensure Thumbtack can ship fast, innovate boldly, and maintain customer trust. THE CHALLENGE AI is reshaping how work gets done at Thumbtack. Employees leverage AI assistants in their daily work and teams are building autonomous agents that act on their behalf - reading data, calling APIs, and making changes across enterprise systems. This introduces changes in the risk landscape. Identities now belong to agents and services as often as to people. Protocols like MCP are opening new pathways between AI and enterprise data. And the pipelines feeding AI systems cross more services, vendors, and trust boundaries than they have previously. The challenge is to evolve security controls to address these shifts in the technology and risk landscape driven by AI-adoption: hardening IAM for non-human and delegated identities, defining safe defaults for MCP servers and autonomous agents, and securing the data pipelines that feed AI systems. We package these controls as secure defaults, paved paths, and reusable patterns so teams can adopt them with confidence. The goal is straightforward — keep Thumbtack moving fast on AI while keeping customer and employee data protected. WHAT YOU’LL DO - This role focuses on improving AI-adjacent security at Thumbtack, including the agents, identities, integrations, and data pipelines that modern AI systems depend on. It also covers broader security engineering work across the enterprise platforms and services that support them.
- Deliver high-quality security assessments and threat models for first-party and third-party AI tools, agents, and AI-integrated systems, ensuring they adhere to enterprise security principles and approved patterns, with sound authentication, authorization, data access, and observability by design.
- Design and validate technical guardrails and reusable patterns that keep AI usage safe at Thumbtack.
- Harden IAM across the enterprise, with particular focus on the non-human and delegated identities behind AI systems (service accounts, agent credentials, SaaS-to-SaaS OAuth, and SCIM federation). Bring least-privilege and lifecycle hygiene to identities that increasingly act at machine speed.
- Provide broader security engineering support across Thumbtack's enterprise platforms and services, including SaaS security and posture management, third-party and integration security, data governance, endpoint security, and identity-centric controls.
- Lead cross-functional security initiatives end-to-end. Partner with IT, Engineering, Legal, Privacy, Procurement, and business stakeholders to surface risk early, set clear requirements, and support scalable adoption of secure patterns. Conduct security design and architecture reviews for enterprise applications, SaaS platforms, and internally developed systems.
- Mentor engineers and partner-team members, raising the overall security bar through guidance and example.
- Support security incident response and drive learning through post-incident analysis.
- Experience developing threat models and proposing technical guardrails for AI tooling and agentic systems, including non-human identities, tool/permission scoping, and safe defaults for agent behavior.
- Deep expertise in modern enterprise security disciplines: authentication and authorization (SSO, OAuth/OIDC, SAML, federation, SCIM), API security and token handling, secrets management, least-privilege design, SaaS security and posture management.
- Strong experience evaluating risk and conducting security design and architecture reviews across enterprise applications, SaaS platforms, integrations, and internally developed systems, including evaluating data flows, third-party integrations, trust boundaries, automation platforms, AI-connected workflows, and emerging integration patterns such as MCP.
- Strong experience securing modern, cloud-native systems (AWS and/or GCP) and familiarity with core control domains such as audit logging, encryption, access control, data retention, and incident response.
- Strong sense of ownership and accountability, balancing hands-on technical execution with the ability to mentor others, raise standards, and drive measurable improvements in enterprise security.
- Excellent written and verbal communication skills, with the ability to influence without authority and translate technical risk into clear requirements and actionable guidance for both technical and non-technical audiences.
- For candidates living in Austin, TX or Washington DC metros or in California, Massachusetts, New Jersey, or Washington states, the expected salary range for the role is currently $189,600.00 - $245,300.00.
- For candidates living in all other US locations, the expected salary range for this role is currently $179,400.00 - $232,100.00.
How to Stand Out
- Highlight concrete examples of threat models or security guardrails you’ve built for AI or ML pipelines in your resume.
- Bring a short demo or write‑up of a past project where you hardened IAM for service accounts or automated least‑privilege enforcement.
- Expect interviewers to ask about handling non‑human identities; be ready to discuss OAuth, SCIM, and lifecycle management.
- Prepare to discuss how you balance security with velocity; use specific scenarios where you enabled rapid delivery without compromising safety.
- Research Thumbtack’s AI initiatives (e.g., autonomous agents) and reference them in your cover letter to show genuine interest.
- When negotiating, emphasize the value of equity and remote‑work flexibility, as these are core parts of Thumbtack’s compensation philosophy.
- Watch for vague descriptions of “security tooling”; ask clarifying questions about the existing stack to gauge fit.
This is a remote position listed on WFA Digital, the platform for professionals who work from anywhere. Browse more remote jobs across all categories.