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Heirloom Tech Stack

Direct air capture technology that removes CO2 at scale

Environmental Services San Francisco, CA 51–200 employees Founded 2020 Privately Held

Heirloom operates a Direct Air Capture (DAC) facility—the first permanent-capture DAC plant in North America—built on limestone-based chemistry that compresses years of natural carbonation into days. The tech stack reveals a hardware-first operation: AutoCAD, Revit, MATLAB, and Aspen HYSYS dominate, paired with operational tooling (Kafka, Kubernetes, SQL) for process control and logistics. The hiring mix is engineering-heavy with senior-level roles clustered around mechanical subsystems, process control, and manufacturing—pointing to rapid scale-out of hardware production and the transition from pilot to commercial operations.

Tech Stack 18 technologies

Core StackApache Kafka Go Linux Kubernetes Smartsheet AutoCAD Revit Python MATLAB NATS MQTT SQL Git Microsoft Project Oracle Primavera Google Workspace Aspen HYSYS AutoCAD Plant 3D

What Heirloom Is Building

◆Challenges

Reducing dac cost
Building high-performing finance function
Reducing maintenance frequency
Low-cost scalable design
High-volume parts manufacturing
Challenging environment parts
Improving economics
Ensuring robust internal controls
Scaling dac operations
Ensuring reliable dac operations

▲Active Projects

Building internal accounting team
Collaborating with external accounting partners
In-house hardware platforms for cdr process
Electro-mechanical subsystem lifecycle
Mechanical subsystem design and deployment
Accelerated looping process control
Direct air capture technology development
Digital tooling for reliable operations
Pilot plant in tracy, ca
Demonstration plant

Hiring Activity

Accelerating10 roles · 8 in 30d

Department

Engineering

7

Finance

1

Logistics

1

Ops

1

Research

1

Seniority

Senior

7

Mid

2

Intern

1

Manager

1

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About Heirloom

Heirloom develops direct air capture technology to remove CO2 permanently from the atmosphere. The company has deployed a commercial DAC facility in Tracy, CA, and sells carbon removal credits to major buyers including Microsoft, JP Morgan, McKinsey, Stripe, and Shopify. Founded in 2020 and based in San Francisco with 51–200 employees, the company is structured around hardware development, process optimization, and facility operations. Current focus areas include accelerating cost reduction, designing for high-volume manufacturing, and scaling reliable operations across multiple sites.

HeadquartersSan Francisco, CA

Company Size51–200 employees

Founded2020

Hiring MarketsUnited States, Canada

Frequently Asked Questions

What is Heirloom's direct air capture technology?

Heirloom uses limestone-based chemistry to capture CO2 from air. The process accelerates natural carbonation from years to days, enabling permanent removal. The company operates a commercial DAC facility in Tracy, CA—the first permanent-capture plant in North America.

What tech does Heirloom use for operations?

Core stack includes AutoCAD, Revit, MATLAB, and Aspen HYSYS for hardware design and process simulation. Operations rely on Kafka, Kubernetes, SQL, Go, and MQTT for control systems and logistics. Project management uses Microsoft Project and Oracle Primavera.