Raydar
Founding Software Engineer
$150K–$250K
New York, New York · Full-time · Posted Oct 16, 2026
About the job
Build and ship a consumer product’s AI agent framework, application features, backend services, and supporting infrastructure alongside company leadership.
What you'll do
- Design and improve agent capabilities, including tool use, memory, prompting, retrieval, and evaluation; deploy and tune GPU infrastructure for open-source language models.
- Deliver features from architecture through launch and iteration across the app and backend, and build scalable sandboxed tools and database infrastructure.
- Work with founders on user experience and make technical tradeoffs involving speed, cost, stability, data protection, and usability.
What they ask for
- Full-stack or backend engineering background.
- Hands-on experience building agentic systems beyond basic LLM SDK calls, including tool calling, memory, and system prompts.
- Practical experience serving, fine-tuning, or evaluating open-source language models.
- A track record of building and shipping a product with measurable results, plus a public code portfolio showing personal projects and recent, steady activity.
Nice to have
- Founding or early engineering experience at an applied AI or consumer startup.
- Strong consumer product instincts or open-source contributions.
Pay
USD 150,000 to 250,000 per year (base salary)
Tools
GPU infrastructure, open-source language models
AI focus
Build agentic systems and supporting infrastructure; work with open-source language models, including deployment, fine-tuning, and evaluation.
Model-written summary · the original posting is authoritative