Founding AI Research Engineer: Agentic Coding Systems

Socket.dev; San Francisco (CA); On-site; USD 150,000 - 250,000; Full time

Benefits offered by this job

Equity

YC-backed

Founding team

Job summary

Klavis AI is hiring a founding engineer to build, test, debug, and ship software that powers frontier AI post-training data projects. You’ll work with the founders to create tasks, environments, and data pipelines using Python, TypeScript, Docker, and advanced AI tooling.

You should have extensive experience with LLMs, coding agents, and AI-assisted engineering workflows, and you’ll own core product areas from design to production within a founding team.

Qualifications

• 3+ years of professional software engineering experience.
• Extremely strong with LLMs, coding agents, and AI-assisted engineering workflows.
• Proficient across Python, TypeScript, shell, Docker, Git, APIs, databases, and modern dev tools.
• Strong taste for realistic long-horizon coding tasks, test design, agent workflows, evals, and edge cases.
• Care deeply about correctness, verification, reproducibility, and data quality.
• Move fast without accepting sloppy work.
• Desire ownership and intensity of founding-stage work.

Responsibilities

• Build high-quality long-horizon coding datasets for frontier AI post-training.
• Create coding tasks, hidden tests, gold solutions, rubrics, dockerized environments, and agent trajectories.
• Design realistic software engineering workflows across terminals, repos, APIs, databases, and developer tools.
• Use LLMs and coding agents to accelerate engineering and data production.
• Build infrastructure for data generation, environment orchestration, verification, evaluation, and QA.
• Work with human experts to define valuable tasks for frontier post-training.
• Turn customer needs into reliable, scalable data products.

Skills

LLMs & coding agents

Python

TypeScript

Shell

Docker

Git

APIs & databases

AI-assisted engineering

Product ownership

Tools

MCP servers

Eval systems

LLM orchestration tools

Claude Code / Codex

Job description

Klavis AI is hiring a founding engineer to build, test, debug, and ship software that powers frontier AI post-training data projects. You’ll work with the founders to create tasks, environments, and data pipelines using Python, TypeScript, Docker, and advanced AI tooling.

You should have extensive experience with LLMs, coding agents, and AI-assisted engineering workflows, and you’ll own core product areas from design to production within a founding team.