Hybrid Founding Senior Full Stack Software Engineer – AI-First SaaS Platform

at AI Fund

• Job title: Founding Senior Full Stack Software Engineer – AI-First SaaS Platform
• Job type: Full Time
• Experience level: Senior
• Salary: Not specified
• Degree requirement: Bachelor's Degree
• Tech skills: AWS, Azure, Distributed Systems, Google Cloud Platform, JavaScript, Node.js, Python, TypeScript
• Location requirements: Hybrid, Irvine, United States

About the role

• Founding Senior Full Stack Software Engineer contributing to an AI-first SaaS platform startup. Engaging in full-stack development, mentoring, and shaping the engineering culture.

Responsibilities

• Act as a founding engineer, shaping architecture, engineering standards, and best practices.
• Design, build, and maintain end-to-end features across the ResolveGrid SaaS platform.
• Develop and operate backend services using Node.js with TypeScript/JavaScript.
• Build and evolve frontend application flows using modern JavaScript/TypeScript frameworks.
• Write and maintain Python services and supporting tools.
• Design and implement AI-powered features, including: Chat agents and autonomous agents, Context management and memory strategies, Prompt engineering, evaluation, and iteration, and Agent workflows and orchestration.
• Use AI coding agents (e.g., Cursor, Windsurf, Claude) as a first-class part of daily development.
• Make architectural decisions with scalability, reliability, and maintainability in mind.
• Collaborate closely with product and leadership on roadmap and execution.
• Debug production issues and continuously improve system performance and reliability.
• Mentor and help grow the engineering team over time.

Requirements

• 7+ years of professional software engineering experience.
• Strong expertise in TypeScript/JavaScript and Node.js.
• Proven experience building and operating SaaS platforms.
• Solid production experience with Python.
• Hands-on experience building AI-driven systems, including LLM-based chat or agent workflows.
• Practical knowledge of prompt engineering, context/window management, and agent design patterns.
• Demonstrated experience using AI coding agents (e.g., Cursor, Windsurf, Claude).
• Experience deploying and operating systems on AWS, GCP, or Azure.
• Strong understanding of system design, APIs, and distributed systems.
• Comfortable operating with ambiguity and high ownership in an early-stage startup.
• Ability to work regularly from Irvine, CA (Orange County).

Benefits

• Be a founding engineer with real ownership and influence.
• Join an AI-first, high-caliber engineering team that treats AI as a force multiplier.
• Build production-grade AI systems with real customer impact.
• Competitive compensation including meaningful equity.
• Opportunity to grow into technical leadership as the company scales.