Senior Software Engineer, Foundation Agents & Evals

Fieldguide; United States; On-site; USD 170,000 - 210,000; Full time

Benefits offered by this job

Health

Dental

PTO

Job summary

Fieldguide is seeking a Senior Software Engineer, Agents, to own how we measure and improve agent quality. You will drive evals, error-analysis, and platform reliability for long-horizon agents, designing infrastructure to support evaluation, learning from failures, and hardening backend systems at scale.

You will mentor teammates, work on frontier AI problems, and contribute to platform-level improvements that affect every agent built on Fieldguide.

Qualifications

• Backend engineering experience.
• Strong experience with AI platforms.
• 1+ years working specifically on agents.
• Demonstrated experience building evals and performing error analysis.
• Frontend experience is a plus; distributed systems experience is valuable.

Responsibilities

• Own evals strategy and error-analysis practice to improve agent quality.
• Design and build agent knowledge and evaluation infrastructure for Fieldguide’s long-horizon agents.
• Lead error analysis on agent behavior and drive platform-level reliability improvements.
• Build and harden backend systems that support agent execution, evaluation, and monitoring at scale.
• Mentor engineers on the team and raise the bar for eval rigor.

Skills

Backend engineering

Agents

Eval & error analysis

Distributed systems

Platform engineering

Mentoring

Leadership

Job description

Fieldguide is seeking a Senior Software Engineer, Agents, to own how we measure and improve agent quality. You will drive evals, error-analysis, and platform reliability for long-horizon agents, designing infrastructure to support evaluation, learning from failures, and hardening backend systems at scale.

You will mentor teammates, work on frontier AI problems, and contribute to platform-level improvements that affect every agent built on Fieldguide.