Joist AI Tech Stack

AI-powered proposal and RFx platform for architecture and construction firms

Software Development San Diego , CA 11–50 employees Founded 2022 Privately Held

Joist AI builds proposal automation software for AEC teams, with a tech stack built around Python, React, and multi-model LLM orchestration (OpenAI, Claude, Mistral, Llama via LangGraph and LlamaIndex). The company is actively shipping agentic AI applications and ML evaluation frameworks while adopting infrastructure-as-code tooling (Terraform, Pulumi) — indicating a shift toward production-grade AI deployment at scale. Engineering dominance in the hiring mix (5 of 14 roles) paired with internal pain points around "deploying bleeding-edge AI to production" and "reducing ticket-waiting" suggests the team is solving hard problems in generative model evaluation and operational efficiency.

Tech Stack 46 technologies

Core StackReact Python FastAPI AWS AWS Lambda AWS RDS GitHub GitHub Actions Playwright Jira Postman Java PyTorch TensorFlow OpenAI Pinecone Weaviate AWS Step Functions Linear TestRail Zephyr Swagger SQL Claude Mistral Llama LangGraph LlamaIndex Crew AI FAISS+14 more

AdoptingTerraform Pulumi

What Joist AI Is Building

◆Challenges

Demanding workflows
Streamlining proposal processes
Modernizing revenue operations
Faster pursuit operations
Modernizing industry operations
Deploying bleeding-edge ai to production
Eliminating friction for engineering teams
Reducing ticket-waiting
Streamlining proposal delivery
High churn risk

▲Active Projects

Golden path internal developer tools
Observability-as-a-service layer
Joint success plans
Executive business reviews
Data-driven value realization
Web application development
Agentic ai applications for autonomous decision-making
Ml pipelines for production scalability
Evaluation frameworks for generative models
Ci/cd evolution

Hiring Activity

Minimal15 roles · 1 in 30d

Department

Engineering

Support

Sales

Marketing

Product

Seniority

Senior

Manager

Mid

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About Joist AI

Joist AI is a sales enablement and content management platform for architecture, engineering, and construction teams. The product helps proposal teams respond to RFQs and RFPs by retrieving institutional knowledge, generating compliant content, and catching quality issues — reducing both turnaround time and internal friction. Founded in 2022 and based in San Diego, the company operates at 11–50 employees with a senior-heavy engineering organization (10 senior-level roles across engineering, product, and support). Active development spans web application infrastructure, agentic AI for autonomous decisions, ML pipelines for production scalability, and observability tooling.

HeadquartersSan Diego , CA

Company Size11–50 employees

Founded2022

Hiring MarketsIndia, United States

Frequently Asked Questions

What AI models does Joist AI use?

Joist AI integrates multiple large language models including OpenAI, Claude, Mistral, and Llama, orchestrated via LangGraph and LlamaIndex for retrieval-augmented generation and agentic workflows.

What is Joist AI's tech stack?

Front-end: React. Backend: Python with FastAPI. Cloud: AWS (Lambda, RDS, Step Functions). LLM/ML: PyTorch, TensorFlow, OpenAI, Claude, Mistral, Llama, LangGraph, LlamaIndex, Crew AI, FAISS, Pinecone, Weaviate. DevOps: GitHub, GitHub Actions, Terraform, Pulumi.