Software Engineer, Platform

Benefits

Parental leave

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Non-birth-parent leave

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Family-building benefits

• Fertility benefits: Not verified
• Adoption assistance: Not verified
• Surrogacy assistance: Not verified

Mental health support

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Relocation assistance

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Childcare support

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Learning budget

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Verification

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Salary

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401(k) match

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Market context

U.S. role benchmark (BLS OEWS)

$116,543 U.S. median for this role

Projected growth (BLS Employment Projections)

+9.8% - Much faster than average

Matched to SOC 15-1252 - Software Engineering aggregate by role bucket.

Source: U.S. Bureau of Labor Statistics, OEWS, May 2024 and Employment Projections, 2024-2034.

Role

Role function

Engineering From the posting source checked Jun 20, 2026

Seniority

Mid From the posting source checked Jun 20, 2026

Work mode

Onsite From the posting source checked Jun 20, 2026

In-office days

5 days From the posting source checked Jun 20, 2026

Schedule

Shift type

Not verified

Weekend work

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Company

Company stage

Series A From the posting source checked Jun 20, 2026

Application

Cover letter

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Assessment

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Deadline

Not stated

Where they hire

State eligibility is not yet verified.

About this role

Software Engineer, Platform San Francisco | OnSite ABOUT SIM We're a small team, YC X25, and backed by a $7M Series A led by Standard Capital with participation from Paul Graham, Perplexity, SV Angel, and Y Combinator. We're based in San Francisco and build in person every day. Our mission is simple: agents will run the world, and Sim is the primary means by which that happens. ABOUT THE ROLE You'll lead the Sim platform: the visual, end-to-end agent builder that tens of thousands of developers use every day. You'll own the front-end architecture, the real-time canvas, and the systems that turn visual flows into reliable, production agents. 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. Your job is to make this experience fast, delightful, and powerful enough that developers never want to go back to writing agents in code. This is a foundational role. You'll define the front-end architecture, set performance standards, and shape the developer ergonomics of a product used by 70,000+ builders. On a small team, you own the entire surface area that developers interact with. WHAT YOU'LL DO - 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 -

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