Senior Software Engineer, Agents (Foundation Agents)

Fieldguide; San Francisco (CA); On-site; USD 225,000 - 250,000; Full time

Benefits offered by this job

Competitive equity

Health benefits

401(k) plan

In-person offsites in the U.S.

Job summary

Fieldguide is seeking a Senior Software Engineer, Agents, to own how we measure and improve the quality of long-horizon agents on our AI platform. You’ll lead evaluations, build infrastructure, and drive reliability across production systems.

You will mentor peers, collaborate with the AI team, and help shape the platform roadmap while delivering scalable backend solutions that power agent execution and monitoring.

Qualifications

• 1+ years working specifically on agents.
• Strong experience working on an AI platform.
• Demonstrated experience building evals and performing error analysis.
• Backend engineering experience.

Responsibilities

• Evals strategy and error-analysis to improve agent quality.
• Design and build agent knowledge and evaluation infra.
• Lead error analysis on agent behavior to drive reliability.
• Build and harden backend systems for agent execution at scale.
• Advance the AI platform's reliability roadmap with the team.
• Mentor engineers on eval rigor and error-analysis practices.

Skills

Agents

Evals & error analysis

Backend engineering

AI platform

Job description

About Us

Fieldguide is establishing a new state of trust for global commerce and capital markets by automating and streamlining 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.

About Us

Fieldguide is establishing a new state of trust for global commerce and capital markets by automating and streamlining 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.

We're based in San Francisco, CA, and 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.

About The Role

The Foundation Agents team stewards the long-horizon agents powering the Fieldguide AI platform. We work at the frontier of AI product development: agent knowledge, evaluations, and improving quality and reliability at scale. As a Senior Software Engineer, Agents, you'll take ownership of how the team measures and improves agent quality, and help drive the platform forward.

What You’ll Own

• Evals strategy and error-analysis practice, shaping how the team measures and improves agent quality
• Design and build agent knowledge and evaluation infrastructure for Fieldguide's long-horizon agents
• Lead error analysis on agent behavior, turning findings into concrete platform-level reliability improvements
• Build and harden backend systems that support agent execution, evaluation, and monitoring at scale
• Drive the AI platform's reliability and quality roadmap forward, working closely with the broader AI team
• Mentor engineers on the team, raising the bar on eval rigor and error-analysis practice

Who You Are

• You've built AI products end-to-end, with real ownership over agent quality outcomes
• You think in evals and error analysis as a discipline; you dig into why an agent failed and fix the systemic cause
• You're strong in the backend and comfortable owning platform-level systems
• You're motivated by long-horizon agents that do real work in production
• You multiply the people around you, not just your own output

Experience

Must-have

• 1+ years working specifically on agents
• Strong experience working on an AI platform
• Demonstrated experience building evals and performing error analysis
• Backend engineering experience

Nice-to-have

• Strong platform engineering skills
• Frontend experience
• Distributed systems experience

What Should Excite You

• Long-horizon agents: Working on agents that do real, sustained work
• Evaluation as a craft: Evals and error analysis are core to how this team improves quality, not an afterthought
• Platform-level impact: Your work shapes the reliability and quality of every agent built on top of it
• Frontier problems: You're working on open problems in agent reliability that don't have established playbooks yet

Benefits

• Competitive compensation with equity
• Comprehensive health and wellness benefits
• Flexible time off and work schedulesTechnology reimbursements
• 401(k) plan
• Twice-yearly in-person offsites across the U.S.
• Wellness benefits starting on your first day

Our Values

• Fearless — Inspire and break down seemingly impossible walls
• Fast — Launch fast with excellence; iterate to perfection
• Lovable — Deliver happiness and 11-star experiences
• Owners — Execute and run the business with ownership
• Win-win — Create mutual value and earn trust for life
• Inclusive — Scale the best ideas with inclusive teams

Compensation Range

$225K - $250K