Founding Software Engineer Fast-growing consumer software

Position: Founding Software Engineer Fast-growing consumer software company New York $150k to $250k USD base a year
Location: New York

# Founding Software Engineer Fast-growing consumer software company
* Location New York
* Type Full-time
* Posted
16 October 2026

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The role, as published## About the company

Our client is a fast-growing consumer software company.## The role Raydar is recruiting for this role on behalf of our client. Own the design and delivery of application and backend features for a widely used consumer product, working side by side with company leadership. The work centers on applied AI systems and the infrastructure behind them, in a compact, in-person environment.##

What you'll do
* ** Build and refine the core AI agent framework**, covering tool use, memory, prompting, retrieval and evaluation.
* Take features from architecture through launch and ongoing iteration across the user-facing app and backend services.
* ** Partner directly with the founders to shape a simple**, polished user experience.
* Extend agent capabilities with sandboxed tooling and backend and database infrastructure designed to scale.
* Help deploy and tune GPU infrastructure, including fine-tuning and serving open-source language models.
* Weigh tradeoffs between speed, spend, stability, data protection and usability when making technical decisions.
* Contribute to future product initiatives as the company grows.## What we're looking for
* Solid engineering background across the full stack or on the backend.
* Hands-on experience building an agentic system that goes beyond simple LLM SDK calls, including tool calling, memory and system prompts.
* Practical experience with open-source language models, such as serving, fine-tuning or evaluation.
* A history of building and shipping your own product, whether a startup, side project or open-source work, with measurable results such as users, revenue or adoption.
* A public code portfolio showing personal projects and recent, steady activity.
* Clear, effective communication.
* Comfort taking ownership of whatever needs attention in a lean team.
* Willingness to work an intense early-stage schedule, up to 7 days a week with 5 in the office.## Bonus points
* Founding or early engineer experience at an applied AI or consumer startup.
* Strong consumer product instincts.
* Open-source contributions.
* A long coding history that predates AI coding tools.## Location and work model
* New York, NY, United States
* On-site, 5 days per week in the office
* Full-time## Compensation, as the posting describes it
* Equity Pay $150k to $250kUSD base a year