Founding Backend Software Engineer

Join to apply for the Founding Backend Software Engineer role at Rebolt (YC W25)

Rebolt is building the next‑generation no‑code platform that empowers companies to create and deploy custom full‑stack applications in minutes. Our mission is to enable both technical and non‑technical teams to replace brittle spreadsheets and one‑size‑fits‑all SaaS with their own internal tools.

Base pay range

$60,000–$180,000 per year.

Why Join

• Participate in building a cutting‑edge AI agent platform from 0 to 1 and scale it to production.
• Significant founding‑team equity.
• Work directly with AI/ML systems, web agents, and full‑stack development.
• Shape the technical architecture and culture of a fast‑growing YC‑backed startup.

Qualifications

• 2+ years of backend engineering experience and a solid foundation in both Computer Science and software engineering principles. We’re also open to exceptional college graduates with strong intern/co‑op experience.
• Fluent in Python and TypeScript, with experience in FastAPI and/or Next.js.
• Understanding of databases (KV, SQL, document‑based), when each should be used and how they can be optimized.
• Experience developing, testing, and scaling RESTful APIs.
• Self‑motivated, low ego, and eager to work on a fast‑paced, intense, fun team; passion for building a world‑class engineering culture.
• Product‑focused, viewing technology as a means to create an amazing product.
• Values code quality while shipping fast when needed.
• Excited about AI/ML applications, having worked with LLMs, agents, and automation.

Nice To Have

• Knowledge of OOP design patterns, clean architecture, event sourcing, and test‑driven development.
• Experience with DevOps tooling: Docker, Kubernetes, GitHub Actions, and cloud platforms.
• Thorough knowledge of the Linux operating system.

Hiring Process

• 30‑minute interview with a founder to discuss your background.
• If we think you’re a potential fit, you’ll receive a take‑home assignment.
• One‑hour interview reviewing your submission and discussing your solution.
• Final interview with the full team.

What It Means To Join The Team

• Own the engine room: architect and ship core services that power our multi‑agent AI workflows—rock‑solid RESTful APIs, evolution‑ready data models, and deployment/debug tools that work.
• Be the go‑to expert: troubleshoot critical production issues, mentor peers on system design, and evangelize best practices across services and languages.
• Move at startup speed: partner directly with customers, diagnose pain points, and deliver impactful improvements in hours, not quarters.