Payroll & Stock Administration Assistant

Mixel, a Silvaco Company, is an innovator of high-performance analog mixed signal semiconductor IPs whose solutions are powering Mobile, Display, Camera, Automotive, VR, AR and AI applications.

Our mission is to provide our customers and partners with outstanding mixed-signal, silicon-proven IPs, creating in the process a differentiating technology that sets your products apart.

At Mixel, you will find an inspiring environment with a strong focus on technical innovation, people well-being, no layers of management, and the freedom to make meaningful contributions in a setting that encourages creative thinking. We value open communication, empathy, mutual trust, and respect.

Payroll & Stock Administration Assistant

Full-Time

About the Role

We are looking for a detail-oriented and organized Payroll & Stock Administration Assistant to support our Finance team. This role is responsible for assisting with day-to-day payroll processing and equity administration activities. The ideal candidate is highly accurate, comfortable with multiple systems, and eager to grow their career in payroll and equity operations.

Key Responsibilities

Payroll

• Assist with end-to-end payroll processing for U.S. employees on a bi-weekly basis
• Maintain and update employee records in the payroll system, including new hires, terminations, salary changes, and deductions
• Reconcile payroll reports and resolve discrepancies in a timely manner
• Support garnishment, tax withholding, and benefit deduction processing
• Assist with payroll tax filings and year-end activities including W-2 preparation
• Respond to employee inquiries related to pay, deductions, and payroll policies

Stock / Equity Administration

• Support the administration of equity plans including RSUs and ESPP
• Assist with processing equity grants, vesting schedules, and releases in the equity platform
• Maintain accurate equity records and assist with reconciliation between the equity platform and internal records
• Coordinate with external brokers, transfer agents, and legal as needed
• Assist with equity-related reporting for financial statements and SEC disclosures
• Support employees with questions related to equity awards, vesting, and tax implications

Qualifications

Required

• 1–2 years of experience in payroll processing, equity administration, or a related HR/Finance support role
• Strong attention to detail and accuracy in data entry and record-keeping
• Proficiency in Microsoft Excel (e.g., VLOOKUP, pivot tables)
• Ability to handle confidential information with discretion and professionalism
• Strong organizational and time management skills with the ability to meet deadlines
• Excellent written and verbal communication skills

Preferred

• Experience with Rippling for payroll and HR administration
• Experience with Workday for HCM or payroll workflows
• Experience with Solium Shareworks (Morgan Stanley) or similar equity administration platforms
• Exposure to equity compensation concepts (RSUs, stock options, ESPP, vesting schedules)
• Experience at a public company or in a SOX-compliant environment
• Associate's or Bachelor's degree in Accounting, Finance, Business Administration, or a related field

What We Offer

• Competitive salary commensurate with experience
• Comprehensive health, dental, and vision benefits
• Equity participation in the company
• Opportunity to grow within a fast-paced, dynamic team
• Collaborative and supportive work environment

All Mixel, a Silvaco Company salary ranges are determined by role, level and geographic location. Within the range, individual pay is determined by work location, role-related knowledge and skills, depth of experience, relevant education or training and additional role-related considerations.

Depending on the position offered, equity, bonuses, commission or other forms of compensation may also be provided as part of total compensation package, in addition to full range of medical, financial and other benefits.

WE ARE AN EQUAL OPPORTUNITY EMPLOYER

At Mixel, a Silvaco Company, we do not discriminate based upon race, religion, color, national origin, gender (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics.

If you need assistance or an accommodation due to a disability, please contact us at 408.567.1000.

https://mixel.com/