---
title: 'Senior / Staff Mechanical Engineer, Fluid Systems at Antora Energy'
canonical: 'https://feeny.ai/job/senior-staff-mechanical-engineer-fluid-systems-antora-energy-san-jose-sa596t0r0dkp'
type: 'job'
last_seen: '2026-09-09'
---

# Senior / Staff Mechanical Engineer, Fluid Systems at Antora Energy

- **Company:** Antora Energy
- **Location:** San Jose, CA
- **Posted:** 2026-03-27
- **Last confirmed live:** 2026-09-09
- **Apply:** https://job-boards.greenhouse.io/antora/jobs/5838836004

## Job description

Antora Energy delivers affordable, reliable energy to industry, data centers, and the grid. Our thermal batteries turn low-cost electricity into always-on heat and power, without supply-constrained critical minerals or multi-year construction timelines.

We are growing our company with people who put team and mission first, value connection through laughter and joy, and work with humility and openness. We are committed to building a diverse, passionate, and creative team dedicated to a future powered by abundant, clean, low-cost energy.

## The Role

Antora is seeking a self-driven and passionate Senior or Staff Mechanical Engineer, Fluid Systems to join our Product Development Team. In this role, you will own the design, analysis, and validation of subsystems that make Antora’s thermal battery possible. Your work will directly accelerate the demonstration and deployment of a first-of-a-kind long-duration energy storage technology.

This is a highly collaborative, hands-on role where you’ll work across disciplines to scope, design, and refine mechanical systems from concept through prototyping, testing, and production. You’ll also help build the processes, standards, and culture that enable our team to deliver at scale

You should be excited to pair strong first-principles engineering with modern tools, including AI-enabled workflows where they meaningfully improve speed, insight, or iteration quality. Just as important, you’ll bring the judgment to validate outputs, challenge assumptions, and keep engineering rigor at the center of every decision.

## What You'll Do

- Own subsystem design: Lead the architecture, analysis, detailed design, and testing of structural, thermal, and fluid components within Antora’s thermal battery.
- Perform rigorous analysis: Thoughtfully leverage AI, apply calculations, finite element analysis (FEA), and trade studies to guide design decisionspply hand calculations, finite element analysis (FEA), and trade studies to guide design decisions.
- Drive validation & reliability: Lead prototyping, testing, failure analysis, and root cause investigation to ensure robust, reliable hardware.
- Pursue cost-down: Identify and implement design and manufacturing approaches that reduce cost without sacrificing performance or reliability.
- Collaborate cross-functionally: Define system requirements, lead design reviews, and integrate feedback across adjacent engineering and operations teams.
- Establish best practices: Develop and maintain CAD standards, documentation, and engineering infrastructure that support high-quality execution and scale.
- Mentor & lead: Guide junior engineers and serve as a technical lead.
- Shape our processes: Balance fast execution with long-term improvements in team workflows, risk management, and product development culture.

## What We're Looking For

- Senior Engineer: Bachelor’s degree in Mechanical Engineering with 6+ years of relevant industry experience, or Master’s degree with 4+ years, or PhD
- Staff Engineer: Bachelor’s degree in Mechanical Engineering with 10+ years of relevant industry experience, or Master’s degree with 8+ years, or PhD with 4+ years
- Examples of relevant industry experience include power generation, aerospace, propulsion, or other industrial hardware products

Required Skills and Experience

- Proven track record of taking complex mechanical systems from concept to deployed hardware
- Strong proficiency with CAD (SolidWorks or similar), PDM systems, and creation of detailed drawings using GD&T and ASME Y14.5
- Deep experience designing machined components for low- to mid-volume production; experience with sheet metal, castings, or composites is a plus
- Proficiency in structural and/or thermal analysis, including FEA and hand calculations
- Experience applying sound engineering judgment in ambiguous, first-of-a-kind environments where requirements evolve and rapid iteration matters
- Curiosity about integrating evolving AI tools into engineering workflows, paired with the critical thinking to recognize limitations, sanity-check outputs, and maintain high technical standards
- Familiarity with systems analysis and risk management tools such as FMEA
- Experience developing engineering processes, standards, and best practices
- Excellent written and verbal communication skills, with a collaborative, humble, and mission-first mindset

Bonus Qualifications

- Experience designing components for very high-temperature environments (500–2500°C)
- Experience with composite and/or brittle materials
- Experience with fluid system design in demanding thermal or industrial environments
- FOAK (first-of-a-kind) product development from concept through sustaining

Work Location:  Onsite in San Jose, CA

Salary Range:  $154,000 USD - $193,000 USD

Salary Basis:  Annual

Please note that the salary range listed above reflects Antora Energy's estimated pay for this position. The actual salary offered will be within the posted range and determined based on several factors including but not limited to a candidate's experiences, credentials and expertise, as they pertain to the position's requirements.

In addition to a competitive base salary, Antora Energy’s Total Rewards program includes equity compensation in the form of stock options, a premium health benefits package with life and disability insurance, a 401K plan with employer contributions, flexible spending accounts, and an industry leading paid-time-off policy that features flexible and inclusive holiday observance, as well as paid volunteer time off. https://diversityjobs.com/employer/top-diversity-employers?utm_campaign=TopEmployer&utm_medium=badge  When it comes to stopping climate change, we need everyone. We believe that having a diversity of backgrounds and experiences strengthens all of us, and we strive to create an environment where every one of us is empowered to create meaningful change.

## About Antora Energy

## Company Overview
- **One-liner**: Antora Energy manufactures and deploys modular thermal batteries that convert low-cost, intermittent clean electricity into reliable, always-on heat and power for global industrial facilities and data centers.
- **Entity Type**: Private (Series B)
- **Headquarters**: San Jose, California, United States
- **Founded**: 2018
- **Founders**: Justin Briggs, Andrew Ponec, David Bierman

## Core Business
- **Primary industry/industries**: Renewable Energy Power Generation, Thermal Energy Storage, Industrial Decarbonization
- **Target customers**: Large-scale industrial energy users (biofuels, refining, pulp & paper, steel & iron, chemicals, mining, concrete & lime, food & beverage) and data center operators (B2B, Enterprise).
- **Mission or purpose statement**: “We are here to power global industry with clean energy.” The company aims to make cheap, clean energy the standard that powers global industry.

## Products & Services
- **Thermal Battery System**: A modular, factory-built energy storage system that uses solid carbon (one of the safest, most stable materials on earth) to store surplus clean electricity as heat. It delivers always-on heat and power for industrial operations, scales from megawatts to gigawatts, and is designed for low cost, rapid deployment, and massive scale.
- **Project Big Stone**: One of the largest battery storage systems in the world, deployed in under 12 months for POET, the world’s largest biofuels producer. It delivers affordable, reliable energy and serves as a proof-of-concept for the company’s giga-scale deployment model.

## Market Standing
- **Valuation/Market Cap**: Not publicly available.
- **Key Metric**: Total funding of **$220.0M** across 10 rounds, including a $150M Series B led by Decarbonization Partners (Feb 2024). Annual revenue estimated at **$7.7M**.
- **Notable Investors/Partners**: Decarbonization Partners, National Science Foundation, California Energy Commission. Key partner: POET (biofuels).
- **Growth Signals**: 197 employees (+36.6% YoY), 31,700 LinkedIn followers (+42.9% YoY), active job postings up 140% YoY. The company is building gigawatt-hours of thermal batteries annually at its U.S. factory and has a presence in Spain.

## Competitive Advantages
- **Proprietary Technology**: Uses solid carbon thermal storage—a simple, safe, and low-cost material—to provide both heat and power, differentiating from chemical battery or molten salt solutions.
- **Modular & Factory-Built**: Modules are manufactured in a U.S. factory, enabling rapid deployment, seamless integration, and operational redundancy at any scale.
- **Speed to Market**: Project Big Stone advanced from an empty lot to energy delivery in under 12 months, demonstrating a fast deployment model that can be replicated globally.
- **Multi-day Storage**: Provides reliable energy for industrial operations where downtime is not an option, solving the intermittency problem of renewables.

## Strategic Focus
- **Scale and Replicate**: Replicating the Project Big Stone model at factories and data centers across the U.S. and globally.
- **Giga-scale Manufacturing**: Expanding factory capacity to produce gigawatt-hours of thermal batteries each year, with a focus on American manufacturing.
- **Market Expansion**: Targeting hard-to-abate industrial sectors (steel, cement, chemicals) and data centers, while expanding internationally (e.g., Spain).
- **Cost Leadership**: Driving down costs to make cheap, clean energy the standard for global industry.

## Why Work Here
- **Mission-Driven Work**: The company’s north star is to power global industry with clean energy, offering employees a chance to work on one of the most urgent climate challenges.
- **Culture**: Values include “Build with Humility & Openness,” “Team & Mission First,” and “Joy & Laughter Connect Us.” The company emphasizes kindness, collaboration, and learning from setbacks.
- **Work Environment**: Hybrid/remote-friendly with “Home Week” each quarter to bring in-person and remote team members together. Offices in San Jose, CA; Big Stone City, SD; and remote roles in the U.S.
- **Benefits**: Competitive salary, stock options, 401k match, 16 weeks paid parental leave, comprehensive medical/vision/dental, HSA with employer contribution, subsidized backup childcare/senior care/petcare, mental health support, on-site gym, healthy snacks, and volunteer time off.
- **Engineering & Impact**: Teams work on cutting-edge thermal storage, manufacturing, and field engineering. The company is growing fast (36% headcount growth) and offers the chance to shape a new industry.

## Sources
1. [antora.com](https://www.antora.com/)
2. [antora.com/company](https://www.antora.com/company)
3. [antora.com/careers](https://www.antora.com/careers)
4. [linkedin.com/company/antora-energy](https://www.linkedin.com/company/antora-energy)
5. [cbinsights.com/company/antora-energy](https://www.cbinsights.com/company/antora-energy)

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