Senior Software Security Engineer

Fieldguide is establishing a new state of trust for global commerce and capital markets by automating the work of assurance and audit practitioners specifically in cybersecurity privacy and financial audits. We build software for the people who enable trust between businesses.

Were based in San Francisco CA and built remote-first. Were backed by Goldman Sachs Alternatives Bessemer Venture Partners 8VC Floodgate Y Combinator and more. Over 50 of the top 100 accounting and consulting firms trust Fieldguide to power mission-critical work.

Our customers hand us their most sensitive audit and compliance data and our product is built around trust. That means our own security practices are core to what we promise them. The Information Security & Compliance team protects Fieldguides systems and earns that trust every day.

As one of the first dedicated security hires youll help build the security function from the ground up. As a Senior Software Security Engineer you will make the secure path the easy path for every Fieldguide engineer. Youll range across secure design identity and secrets management infrastructure security and agentic AI security. We prioritize around the biggest risks rather than fixed specialties so your focus will shift over time.

Youll report to our Lead Security Engineer and work closely with both Product and Platform teams.

• Cloud & Infra: AWS Kubernetes Terraform

• Application: Python TypeScript GraphQL

• AI: LLM gateway and agent orchestration across multiple model providers

• Security Tooling: Socket Chainguard GitHub Advanced Security frontier cyber models

• Partnering with engineering to find the biggest risks in a system before it ships and building secure frameworks and libraries that make control adoption the path of least resistance.

• Building and maintaining identity and secrets management systems including credential issuance rotation and workload authentication. Were moving towards short-lived workload-based identity across our cloud and Kubernetes environments.

• Hardening our cloud security controls and contributing to continuous cloud security posture management through infrastructure-as-code scanning misconfiguration detection and automated remediation.

• Building the security model for AI agents that perform audit work. Youll design permission boundaries that enforce what agents can see and do harden them against prompt injection in untrusted documents and ensure strict tenant isolation across our agentic platform.

• Raising the security bar across engineering through design reviews and coaching helping teams build securely without a gate in the way.

• You have 5 years of software engineering experience building and maintaining security-relevant systems in production.

• Youve led a security initiative from design through adoption and you can point to engineers who are safer and faster because of it.

• You have hands-on experience with identity and secrets management including protocols such as OAuth 2.0 and OIDC.

• Youre familiar with Kubernetes security primitives including RBAC namespaces network policies and admission controllers.

• You reason clearly about trust boundaries and threat models to prioritize risk.

• You thrive on breadth ambiguity and evolving priorities rather than a single narrow lane.

Bonus Points

• Experience with developer security tooling such as SAST dependency scanning or secure build infrastructure.

• Experience with SAML or SPIFFE/SPIRE or building workload authentication systems from scratch.

• Experience securing LLM-based or agentic systems.

Fieldguide is a values-based company. Our values are:

• Fearless - Inspire & break down seemingly impossible walls.

• Fast - Launch fast with excellence iterate to perfection.

• Lovable - Deliver happiness & 11 star experiences.

• Owners - Execute & run the business with ownership.

• Win-win - Create mutual value & earn trust for life.

• Inclusive - Scale the best ideas with inclusive teams.

• Competitive compensation packages with meaningful ownership

• Flexible PTO

• 401k

• Wellness benefits including a bundle of free therapy sessions

• Technology & Work from Home reimbursement

• Flexible work schedules

Required Experience:

Senior IC