Software Engineer, Platform at Sim | Y Combinator
Hacker News
February 23, 2026
AI-Generated Deep Dive Summary
Sim is an open-source platform designed to help developers build, deploy, and orchestrate AI agents using a visual, Figma-like canvas. Over 70,000 developers worldwide, including those from early-stage startups and the U.S. Department of Defense, rely on Sim to transform ideas into production-grade workflows. The platform connects with over 1,000 apps and LLMs, offering cutting-edge tools like a state-of-the-art Copilot for natural language-based workflow creation. Backed by $7 million in Series A funding led by Standard Capital, with support from Y Combinator and notable figures like Paul Graham, Sim is positioned to play a pivotal role in the AI agent revolution.
The Software Engineer, Platform role at Sim is foundational, focusing on leading the visual canvas that serves as the heart of the platform. This includes owning front-end architecture, ensuring real-time performance, and designing intuitive interaction models for creating, testing, and deploying agents visually. The ideal candidate is a design-minded full-stack engineer with deep experience in React, TypeScript, and building complex interactive UIs. They must excel at shipping polished developer tools, optimizing front-end performance, and shaping user ergonomics.
Why does this matter? Sim’s approach to AI development through visual workflows represents a significant shift away from traditional coding, offering developers a faster, more intuitive way to build intelligent systems. For tech enthusiasts, the role at Sim is an opportunity to impact a rapidly growing platform with a mission that aligns with the future of AI. With its open-source roots and world-class backing, Sim is poised to redefine how agents are built, making it a compelling choice for those seeking meaningful innovation in tech.
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Originally published on Hacker News on 2/23/2026