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.
Job title
Founding Senior Full Stack Software Engineer – AI-First SaaS Platform
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