Senior Infrastructure Engineer

About Us Fieldguide is establishing a new state of trust for global commerce and capital markets through automating and streamlining the work of assurance and audit practitioners specifically within cybersecurity, privacy, and financial audit. Put simply, we build software for the people who enable trust between businesses. We’re based in San Francisco, CA, but built as a remote-first company that enables you to do your best work from anywhere. We’re backed by top investors including Growth Equity at Goldman Sachs Alternatives, Bessemer Venture Partners, 8VC, Floodgate, Y Combinator, DNX Ventures, Global Founders Capital, Justin Kan, Elad Gil, and more. We value diversity — in backgrounds and in experiences. We need people from all backgrounds and walks of life to help build the future of audit and advisory. Fieldguide’s team is inclusive, driven, humble and supportive. We are deliberate and self-reflective about the kind of team and culture that we are building, seeking teammates that are not only strong in their own aptitudes but care deeply about supporting each other’s growth. As an early-stage startup employee, you’ll have the opportunity to build out the future of business trust. We make audit practitioners’ lives easier by bringing together up to 50% of their work and giving them better work-life balance. If you share our values and enthusiasm for building a great culture and product, you will find a home at Fieldguide. About the Role As a Senior Infrastructure Engineer at Fieldguide, you'll own critical infrastructure decisions, build platforms that other teams rely on, and bring a level of rigor and reliability that makes the whole organization move with more confidence. In a product built around trust and compliance, the quality of our infrastructure isn't just an engineering concern, but also core to what we promise our customers. Our engineering hub is located in San Francisco. This role is open to remote candidates anywhere in the US; Bay Area-based employees will work in a hybrid setting. What You’ll Do • Design, build, and maintain core platform infrastructure to support scalable, reliable, and secure services across engineering teams. • Develop and manage Infrastructure as Code (IaC) using tools like Terraform to ensure consistent, reliable environments. • Own major architectural decisions and long-term technical direction for Fieldguide’s infrastructure. • Build reusable platforms, abstractions, and AI-enabled tooling that raise the baseline for engineering teams. • Monitor and improve system reliability, performance, and cost efficiency through metrics, logging, and alerting frameworks (e.g., Datadog, CloudWatch). • Ensure infrastructure security and compliance by implementing best practices for identity management, network segmentation, secrets handling, and vulnerability management. • Lead incident response and postmortem processes, driving root cause analysis and structural long-term improvements. • Mentor and collaborate with engineers and tech leads, fostering a culture of reliability, automation, and continuous improvement. • Support disaster recovery and business continuity planning, ensuring high availability and resilience of critical systems. • Document infrastructure design, architecture decisions, and operational procedures for transparency and team enablement. Who You Are • You have 5+ years of hands-on experience constructing complex cloud solutions using multiple AWS services. • You are skilled in provisioning and configuring cloud services using Terraform and the AWS CLI / API. • You have proficiency in designing effective monitoring/alerting and log aggregation solutions using tools like Datadog and AWS CloudWatch (New Relic, Prometheus/Grafana, etc.) • You have a solid und