Sim Infotech Inc.
Software Engineer, Platform
San Francisco
H1B sponsorship availableDetected 141 days ago
TypeScriptReactNext.jsFull-Stack DevelopmentGitAWSWebSocketsLLMsAgentic AIFigma
About the role
- Sim has been called the "Figma for AI agents" - an intuitive drag-and-drop canvas where developers connect LLMs, tools, APIs, and logic blocks into complex agentic workflows.
- You'll define the front-end architecture, set performance standards, and shape the developer ergonomics of a product used by 70,000+ builders.
Responsibilities
- Own the Sim visual canvas - the real-time, drag-and-drop workflow editor at the heart of the product
- Architect and build the front-end systems that render, connect, and manage complex agent workflows
- Design the interaction model for how developers create, test, debug, and deploy agents visually
- Build the bridge between visual flows and the underlying execution engine - ensuring what you see is what runs
- Drive performance and responsiveness across the editor, even as workflows grow in complexity
- Design-minded full-stack engineer with deep React and TypeScript experience
- Experience building complex, interactive UIs - canvas editors, real-time collaborative tools, visual programming environments, or similarly demanding front-end systems
Requirements
- Track record of shipping polished developer tools or creative tools to production
- Deep understanding of front-end performance - you know how to keep complex interfaces fast and responsive
- Comfort working across the stack in a Next.js monorepo
Nice to have
- Experience with real-time systems (WebSockets, CRDTs, or similar) is a plus
- Experience with AWS infrastructure is a plus
- Contributions to open-source projects are a plus
Skills
- the visual, end-to-end agent builder that tens of thousands of developers use every day.
- Your job is to make this experience fast, delightful, and powerful enough that developers never want to go back to writing agents in code.
Compensation
- Competitive salary + meaningful equity.
Company info
- agents will run the world, and Sim is the primary means by which that happens.
Equal opportunity
- Sim is committed to creating an inclusive environment for all employees.
- We celebrate diversity and are committed to creating an inclusive environment for all team members.
- We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.
Visa & Work Authorization
- Visa sponsorship available.
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This listing is sourced directly from Sim Infotech Inc.'s careers page and normalized into a canonical job model.