---
title: 'Mechanical Assembly and Rework Technician - Contract Position at Stealth-mode Battery Startup'
canonical: 'https://feeny.ai/job/mechanical-assembly-and-rework-technician-contract-position-stealth-mode-56yprcnddykq'
type: 'job'
last_seen: '2026-09-24'
---

# Mechanical Assembly and Rework Technician - Contract Position at Stealth-mode Battery Startup

- **Company:** Stealth-mode Battery Startup
- **Location:** Fremont, CA
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-09-15
- **Last confirmed live:** 2026-09-24
- **Apply:** https://jobs.ashbyhq.com/company/e0572941-5ca9-421e-8dfa-c40eb246ca71

## Job description

Mechanical Assembly and Rework Technician - Contract Position

The Mechanical Assembly and Rework Technician will support the assembly, modification, and rework of large battery busplates and related components. Initial work will focus on connector soldering, adhesive-backed assembly, fixture operation, part cleaning, and tab-removal rework. As the role expands, the technician may support additional prototype and low-volume production activities involving large-format mechanical and electromechanical assemblies. This is a hands-on role requiring strong mechanical aptitude, attention to detail, and consistent execution of documented processes.

## Responsibilities

- Solder electrical connectors onto large busplates using established techniques and work instructions.
- Assemble busplates and related components using adhesives, compression fixtures, fasteners, brackets, and hand tools.
- Support prototype builds, engineering trials, and low-volume production of large-format mechanical and electromechanical assemblies.
- Perform controlled rework and part modifications using Dremels, sanders, files, deburring tools, and similar equipment.
- Prepare and clean surfaces and completed parts to meet manufacturing cleanliness requirements.
- Inspect assemblies for dimensions, alignment, fit, surface condition, and overall workmanship using basic measuring tools.
- Set up and maintain tools and fixtures, identify assembly issues, and provide feedback to improve tooling and work instructions.
- Organize materials and document completed work, process results, and observed defects.
- Maintain a clean and safe work area and follow all requirements for soldering equipment, adhesives, power tools, and PPE.

## Qualifications

- High school diploma or equivalent required; associate degree, trade-school training, or technical certification preferred.
- Hands-on experience in mechanical assembly, manufacturing, fabrication, production rework, equipment assembly, or a similar environment.
- Experience using hand tools, power tools, assembly fixtures, and basic measuring equipment.
- Experience with Dremels, sanders, files, deburring tools, or similar fabrication and rework tools.
- Soldering experience preferred; ability to learn and consistently perform a product-specific soldering technique.
- Familiarity with adhesives, surface preparation, clamping, bonded assemblies, or torque-controlled fastening is preferred.
- Ability to read and follow drawings, work instructions, rework instructions, and visual standards.
- Experience with busbars, busplates, battery components, sheet-metal assemblies, or industrial equipment is a plus.
- Strong mechanical aptitude and ability to perform precise, repeatable work.
- Strong attention to detail, safety, cleanliness, and workmanship.
- Basic documentation and data-entry skills.
- Effective communication and ability to work collaboratively with technicians, engineers, and manufacturing teams.

Physical Requirements

- Ability to sit or stand and perform repetitive assembly tasks for extended periods.
- Ability to lift up to 50 pounds with or without reasonable accommodation.
- Ability to handle and position large components safely.
- Ability to perform tasks requiring dexterity, precision, and hand-eye coordination.
- Ability to safely operate soldering equipment, hand tools, power tools, fixtures, and rotary tools.
- Ability to wear required PPE and work in controlled manufacturing or laboratory environments.

Work Environment

- Onsite, hands-on laboratory and pilot-line operations.
- Day shift: 8:00 AM–4:30 PM.
- Swing shift: 3:00 PM–11:30 PM.

The expected duration for the contract is 3 months to start and this is a non-exempt hourly role.

## About Stealth-mode Battery Startup

## Company Overview
- **One-liner**: A stealth-mode startup developing next-generation battery technology to accelerate the global transition to clean energy.
- **Entity Type**: Private (Stealth-mode startup)
- **Headquarters**: San Francisco Bay Area, California, United States
- **Founded**: Not publicly available
- **Founders**: Not publicly available

## Core Business
- Primary industry/industries: Battery Manufacturing, Energy Technology, Clean Energy
- Target customers: B2B (likely automotive, energy storage, or consumer electronics manufacturers)
- Mission or purpose statement: "Revolutionize battery technology to accelerate the global transition to clean energy."

## Market Standing
- **Valuation**: Not publicly available (stealth-mode startup)
- **Key Metric**: Total Funding — Not disclosed; company is currently hiring for multiple roles, suggesting active fundraising or prior funding.
- **Notable Investors/Partners**: Not publicly available
- **Growth Signals**: The company is actively hiring across engineering, project management, and IT roles. Job postings have appeared regularly in recent months. LinkedIn followers have grown at +3.4% monthly, indicating growing interest.

## Competitive Advantages
- **Stealth Mode as a Moat**: By operating in stealth, the company can protect proprietary technology, manufacturing processes, and material science breakthroughs from competitors during critical R&D stages.
- **Advanced Manufacturing Focus**: Emphasis on "advanced manufacturing techniques" and "next-generation energy storage architectures" suggests a manufacturing-centric approach that is harder to replicate than purely chemical innovations.
- **Talent Pipeline from Tesla**: LinkedIn data shows talent sources include Tesla, indicating potential knowledge transfer from the leading EV battery manufacturer.

## Strategic Focus
- **Building the Engineering & Operations Team**: Current hiring priorities focus heavily on engineering, program management, and operations — roles critical to scaling from R&D to pilot production.
- **Manufacturing Readiness**: Job descriptions emphasize procurement, vendor coordination, logistics, and equipment delivery — suggesting the company is moving toward prototype or pilot manufacturing scale.
- **San Jose Operations**: Listing roles in San Jose points to establishing physical lab and manufacturing facilities in a key clean-tech hub.

## Why Work Here
- **Mission-Driven**: Direct impact on clean energy transition and climate change through battery innovation.
- **Early-Stage Equity Potential**: As a stealth startup, early employees likely receive significant equity upside.
- **Compensation**: Competitive base salaries — for example, the Engineering Project Specialist role lists a base salary range of $145,000–$190,000.
- **Hands-On Ownership**: Job descriptions emphasize real ownership and cross-functional collaboration — not just supporting roles.
- **Growth Opportunity**: Roles are designed to scale with the company, offering clear career progression from operations into broader procurement, vendor management, and supply chain leadership.
- **On-Site Culture**: All roles are on-site (San Jose/San Francisco Bay Area), suggesting a collaborative, lab-intensive environment typical of hardware startups.
- **Tech Stack Exposure**: Current tech stack includes tools like Rippling, Python, Jira, SolidWorks, CATIA, Altium, ANSYS, and Linux — indicating a sophisticated engineering environment.
- **Equal Opportunity Employer**: Company explicitly states equal opportunity employment practices.

## Sources
1. [batterystartup.careers](https://www.batterystartup.careers/)
2. [LinkedIn - Stealth Battery Startup](https://www.linkedin.com/company/stealth-battery-startup)
3. [Rise Open Jobs - Engineering Project Specialist](https://joinrise.co/stealth-mode-battery-startup/engineering-project-specialist-eps-t4hp)
4. [Jobsearcher - Stealth Battery Startup](https://jobsearcher.com/companies/stealth-battery-startup)
5. [Ashby - Stealth-mode Battery Startup Careers](https://jobs.ashbyhq.com/company)

## Other roles at Stealth-mode Battery Startup

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- [OT Engineer](https://feeny.ai/job/ot-engineer-stealth-mode-battery-startup-san-jose-283exp9y5m0n) — San Jose, CA
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