Senior AI Engineer

The Role

We’re hiring a Senior AI Engineer to own the design, development, and continuous improvement of the AI agent systems that power modern research operations.

This is a high-ownership, high-impact role at the intersection of applied AI and systems engineering. You’ll work on genuinely hard problems: agent reliability at scale, long-context handling, cascading error mitigation, and evaluation infrastructure — like codegen agents that write in proprietary DSLs, computer-use agents that QA live deployments, data agents that clean tabular exports and configure multi-step analysis, and evals for outputs where “correct” is genuinely ambiguous. And you’ll do it on a team that ships fast and treats quality as non-negotiable.

What You’ll Own

Agent Harness and Architecture

Own the agent harness our production agents run on — the loop where agents plan, use tools, check their work, and recover from failures

Lead research and implementation for long-context handling and cascading-error challenges in multi-step agent pipelines

Drive context engineering strategy and experimentation frameworks across the team

Evaluation and Production Monitoring

Define structured rubrics for evaluating AI outputs on nuanced, ambiguous research tasks

Build continuous monitoring, tracing, and failure-mode analysis for agents in production — including the loop that turns production failures into test cases

Create tooling that lets domain experts refine and evolve the skill files, eval sets, and knowledge bases our agents consume

Reliability for High-Stakes Outputs

Build eval suites — regression sets, golden datasets, LLM-as-judge pipelines — that catch regressions before deploy

Develop evaluation datasets for DSLs, structured data transforms, and computed outputs to systematically find and close model weaknesses

Design human-in-the-loop and review workflows for outputs where a single wrong number in a client report is unrecoverable

What We’re Looking For

Must-Have

Built and operated agentic systems in production — multi-step pipelines, tool use, codegen, computer-use, or data and reporting agents — not just prototypes

4+ years of engineering experience, with at least 1 year focused on LLM/agent systems in production

Deep hands-on experience with frontier model APIs (Anthropic, OpenAI, Gemini), evaluation frameworks, and AI system optimization

Strong Python skills; Go or TypeScript a plus

Solid grasp of context engineering and evaluation methodology

Strong instincts for debugging complex, non-deterministic system failures

High ownership: you drive problems to resolution independently and pull others in when it matters

Nice to Have

Experience with LLM observability and eval tooling (Braintrust, Langfuse, LangSmith, Weave, promptfoo, or in-house equivalents)

Background in semantic parsing, DSLs, or structured-output generation

Prior work on computer-use or browser agents

Experience with human-in-the-loop agent workflows where proposals are reviewed before apply, or agents over large structured datasets

Why Metaforms

Work at the frontier of production AI: systems handling 1,000+ research projects a month, with the reliability bar that implies

A small, senior team where your decisions carry real architectural weight

Zero-bureaucracy culture: high autonomy, fast feedback loops, direct access to leadership

Well-funded and financially stable, with a clear roadmap and the runway to execute on it

Benefits

Full family health insurance

$1,000 USD annual learning and development budget

Dedicated mentor and coaching support

Free snacks and dinner at the office