# Lead Engineer, AI Platform at Circle+

- Company: Circle+
- What the company does: Streamline Metrics for Growth. Backed by Techstars.
- Company website: https://circleplus.xyz
- Type: Startups (AI role)
- Level: Senior
- Location: Anywhere
- Work setup: Remote
- Pay: $170K base salary per year (USD)
- Posted: 2026-10-23
- Apply by: 2026-12-07
- Apply: https://jobs.ashbyhq.com/circle/cb085d54-568c-46b3-829f-b18885c6cda2?utm_source=1752vc&utm_medium=careers
- Page: https://www.1752.vc/careers/jobs/circle-labs-lead-engineer-ai-platform/

## About the role

The AI Quality engineering team at Circle owns the foundation for measuring, diagnosing, and improving the quality of Circle's AI-powered features. This team focuses on building the infrastructure to measure, diagnose, and improve production AI systems, rather than ML research or model training. Found on 1752vc Careers, the job board for startup and VC roles.

## What they're looking for

- Experience building evaluation or observability infrastructure for ML/AI systems. You've built eval pipelines, scorers, dashboards, or CI/CD for evals before and have experience with evaluation frameworks like Braintrust, LangSmith, or similar
- Experience designing datasets, annotation workflows, or labeling pipelines for ML/AI evaluation. You know how to turn raw examples into a dataset you can trust through human annotation, AI-generated data, or simulation
- Comfortable in a fast-paced environment with ambiguity. You’ll need to learn and pick up new technologies when projects require it
- Strong alignment with our company values
- You are proficient in English (spoken, written, and reading) at a CEFR Level C2 / ILR Level 5

Tags: R&D

Source: 1752vc Careers, https://www.1752.vc/careers/jobs/circle-labs-lead-engineer-ai-platform/