---
title: 'Founding AI Engineer at Semble AI'
canonical: 'https://feeny.ai/job/founding-ai-engineer-semble-ai-san-francisco-q5a1fxyh2wz6'
type: 'job'
last_seen: '2026-09-05'
---

# Founding AI Engineer at Semble AI

- **Company:** Semble AI
- **Location:** San Francisco, CA
- **Compensation:** $150k–$250k
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2025-12-11
- **Last confirmed live:** 2026-09-05
- **Apply:** https://jobs.gem.com/sembleai-com/am9icG9zdDrvVr9xBDWeWBRZkvVNM3dc

## Job description

## About Semble AI

Semble AI builds AI agents that design building-systems (fire, HVAC, plumbing, and security). Construction companies use Semble to replace weeks of manual design work with instant, code-compliant system layouts and bills of materials. The $600B building-system integration industry still runs on spreadsheets and hand-drawn markups, even as building codes evolve rapidly and grow more localized. It’s one of the largest blind spots in construction tech, and we’re fixing it. Jonathan and Ethan met studying computer science at Stanford. Jonathan worked at Convergint, one of the world’s largest building-system integrators, to learn the industry from the inside. Ethan’s motivation is personal: his home burned down in 2017 due to a faulty fire system.

We’re building the platform that will become the industry standard for construction-system design, and we’re looking for people who want to build foundational AI products that touch every building on the planet.

## What you’ll work on

As a founding engineer, you’ll work directly with the founders to own and build systems such as:

- Vision pipelines that segment rooms, walls, and architectural elements from noisy PDFs/CAD files
- LLM + RAG workflows that interpret building codes and produce compliant designs
- Full-stack features across our React/Node/Postgres platform You’ll have massive ownership and help set the technical direction of a company in a market that’s about to undergo a once-in-a-generation transition.

Our tech

- Typescript / React / Node / Express / PostgreSQL
- Python (PyTorch, NumPy, etc.)
- Vision models: object detection, instance + semantic segmentation
- AI Agents: multi-agent reasoning, workflow orchestration, MCP
- RAG pipelines: vector DBs, embeddings, chunking strategies

You might be a great fit if you

- Have strong experience in ML (vision AND LLMs), backend, building AI agents, and full-stack engineering
- Thrive in fast-moving environments and love shipping end-to-end
- Care about building reliable, production-grade AI systems
- Want to be early at a YC startup where your work directly defines the company’s trajectory

## Why join us

- You’ll work directly with the founding team (YC F25)
- Ship real AI systems into production for companies across the U.S.
- Own major pieces of the product and architecture
- Help shape the engineering culture from day zero
- Build something that will become the industry standard for top quality commercial building design

Apply Here: https://www.workatastartup.com/jobs/86167

## About Semble AI

## Company Overview
- **One-liner**: Semble AI provides an all-in-one, AI-powered operating system for construction and building system integrators, automating workflows from design and takeoffs to field operations and invoicing.
- **Entity Type**: Private (YC F25, Pre-Seed/Seed stage)
- **Headquarters**: San Francisco, California, United States
- **Founded**: 2025
- **Founders**: Jonathan Tyshler (CEO) and Ethan Boyers (CTO)

## Core Business
- **Primary industry/industries**: Construction Technology (ConTech), Building System Integration, AI-Powered Workflow Automation
- **Target customers**: B2B; building system integrators (fire, HVAC, plumbing, security), construction firms, and engineering companies managing commercial and residential projects.
- **Mission or purpose statement**: To serve as the operating system for construction businesses, keeping the office and field in sync on every project and providing AI agents to run essential workflows.

## Products & Services
- **[Semble Platform]**: A unified SaaS platform that covers the full project lifecycle for integrators, including takeoffs & design, quoting, scheduling, field operations, inventory management, and invoicing. It features a mobile app for technicians that works offline.
- **[AI Workflow Agents]**: Custom AI agents trained on a business's specific operations to automate repetitive back-office processes such as scheduling, coordination, project handoffs, and data entry across portals.

## Market Standing
- **Valuation/Market Cap**: Not publicly available
- **Key Metric**: Total Funding of $625,000 across two rounds (Seed: $125k, Pre-Seed: $500k)
- **Notable Investors/Partners**: Y Combinator (lead investor for Pre-Seed round), Agile Angel, Eight Capital Group, Rock Yard Ventures.
- **Growth Signals**: Recently founded in 2025 and accepted into Y Combinator's Fall 2025 batch; has a very small but rapidly growing team (3 employees with 66.7% monthly headcount growth); actively hiring a Founding AI Engineer.

## Competitive Advantages
- **All-in-One Platform**: Unlike fragmented tool stacks, Semble is the only platform that covers every aspect of an integrator's business—from design and quoting to field ops and invoicing—on a single system at a fraction of the cost of alternatives.
- **AI-Native Workflows**: Deep integration of AI agents specifically trained on a construction business’s own operations, reducing manual, repetitive processes and ensuring code compliance.
- **Offline-First Field Ops**: The technician mobile app works without a signal, allowing field crews to access plans, tasks, and photos from any job site.

## Strategic Focus
- **Product Development**: Building out the platform's generative design capabilities and AI agent functionality to handle more complex workflows.
- **Talent Acquisition**: Hiring a founding AI engineer to lead the development of core AI and machine learning systems.
- **Customer Acquisition**: Targeting building system integrators and construction firms looking to digitize and automate their operations.

## Why Work Here
- **Founding Team Impact**: As an early employee at a Y Combinator-backed startup, you will have significant ownership and influence over the product and technical direction.
- **Cutting-Edge Tech Stack**: Work with modern technologies including PyTorch, React, PostgreSQL, Python, and TypeScript.
- **Hybrid Work Environment**: The company operates with a hybrid workspace in San Francisco, combining remote flexibility with on-site collaboration.
- **Founder Background**: Founders are Stanford CS graduates with deep industry knowledge (CEO Jonathan Tyshler previously worked at Convergint, a major building system integrator), providing strong domain expertise and mentorship.

## Sources
1. [sembleai.com](https://www.sembleai.com/)
2. [linkedin.com](https://linkedin.com/company/sembleai)
3. [ycombinator.com](https://www.ycombinator.com/companies/semble-ai)
4. [builtin.com](https://builtin.com/company/semble-ai)
5. [cbinsights.com](https://www.cbinsights.com/company/sembleai)

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