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True Talent Solutions Partners

Full-Stack Engineer, Agent Evaluation & Reliability

San Francisco
Salary
$120,000 - $180,000 annually
Level
Mid
Work type
On-site · San Francisco
Visa
Sponsors visas

Open. First seen 25 October 2026.

Apply on the company's site →

About the role

About the Role

Join a seed-stage AI infrastructure startup building systems that help enterprise AI agents become more reliable. This backend-leaning full-stack role focuses on the data models, integrations, and workflows that turn agent performance signals into continuous product improvements.

What You'll Do

  • Build and operate backend systems for agent evaluation and continuous improvement.
  • Design data models for evaluation datasets, experiment runs, agent traces, knowledge versions, findings, and customer-defined quality criteria.
  • Develop and maintain enterprise integrations, including authentication, OAuth, webhooks, syncs, backfills, retries, and monitoring.
  • Own features from technical design and implementation through deployment, production monitoring, customer feedback, and iteration.
  • Work with customers to understand their systems, diagnose failures, and turn specific needs into reusable product capabilities.
  • Ship full-stack features that make the platform's underlying infrastructure useful to customers.

What We're Looking For

  • Two to four years of experience building and operating production software, including experience at a fast-paced startup.
  • Hands-on machine learning engineering and model development experience, with an understanding of how evaluating nondeterministic agent systems differs from conventional testing.
  • Strong production experience with TypeScript and Node.js or Bun, and the ability to work across the full stack.
  • Strong PostgreSQL skills and practical experience with Redis, job queues, background workers, or workflow systems.
  • Experience owning projects end to end, moving quickly, and making sound technical and product decisions.

Compensation & Benefits

Base salary: $120,000 to $180,000 annually. Visa sponsorship is available.

Location

On-site in San Francisco, California, United States.

What this role asks for

Particular to this role

OAuth · Redis

Rare in True Talent Solutions Partners's other 117 open postings.

Standard for full stack roles

JavaScript · Node.js · PostgreSQL · TypeScript

Common in full stack postings at any company.

Compared with True Talent Solutions Partners's other open jobs.

The team: Client Roles

This role is one of 118 open in Client Roles. 118 were posted in the last 30 days, including 6 lead roles: the team is hiring the people who run it too.

WHAT THE TEAM WORKS WITH, ACROSS ITS POSTINGS

Python (64 of 118), LLM (47 of 118), TypeScript (47 of 118), React (38 of 118), Machine Learning (30 of 118), AWS (27 of 118), JavaScript (27 of 118)

OTHER ROLES ON THIS TEAM

From the team and dates on True Talent Solutions Partners's own job board.

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