Independent Contractor Audio Mastering Engineer Jobs in Missouri

Sigma Connectivity Inc., an engineering services company with its roots in mobile phone innovation at Sony Ericsson and Sony, stands as a distinguished design house. Our team, comprising over 700 skilled engineers based primarily in Lund, Southern Sweden, specializes in developing connected consumer electronics and IoT devices through dedicated in-house projects. Equipped with the necessary talent, expertise, and state-of-the-art laboratories, we are adept at bringing the market’s most challenging projects to life. Our operations stretch across San Jose, San Diego, Seattle, and New York, ensuring a comprehensive national presence. As we continue to expand, we are on the lookout for versatile and dynamic individuals eager to contribute to our growth. At Sigma Connectivity Inc, our culture is grounded in the exchange of knowledge and experiences, underpinned by a Scandinavian approach to work-life balance and a commitment to our team's well-being. Here, you’ll Never Work Alone; instead, you’ll be part of a collaborative and supportive environment, ready to explore new horizons together.

JOB OVERVIEW

In the Audio and Acoustic Systems Integration Engineer role, you will support the lead Audio Integration Engineer in carrying out design studies and providing support to resolve audio-related hardware issues. You will also help evaluate the audio quality for AR and VR systems.

RESPONSIBILITIES

• Support the design and prototyping of audio subsystems for AR and VR products.
• Support the design and prototyping of noise and vibration subsystems (such as VR fan systems).
• Perform acoustic analysis of audio subsystems or noise and vibration subsystems through measurement, DOEs, and communicating results to cross-functional teams.
• Support the manufacturing of products by collaborating with cross-functional teams, suppliers, and/or CMs.
• Collaborate with internal teams to bring up development-level hardware for audio and acoustic testing. This involves working with development-level software and hardware.
• Act as point of contact for specific product audio development activities. Plan and lead team meetings as necessary to accomplish project goals. Proactively engage and update team members to keep product requirements and timelines on target.
• Independently manage multiple workstreams and prioritize critical activities.
• Requires 15% travel to Asia

Required Qualifications

• Graduate Degree; M.S. in acoustics preferred; graduate-level degree in EE or ME
• Strong mathematical background in physics
• Strong understanding of the full acoustic/audio and software/hardware signal paths
• Strong fundamentals in digital signal processing and psychoacoustics
• Acoustic test and measurement skills
• Experience with data analysis, reporting, and presentation
• Experience with MATLAB and/or Python coding
• Experience with Soundcheck, Audio Precision, DAW (digital audio workstation)
• Critical listening skills for audio quality evaluationsStrong technical communication skills
• Self-motivated, flexible to switch contexts, and open to learning
• Strong problem-solving and critical-thinking skills

Soft Skills

• Strong problem-solving and analytical skills
• Ability to work in fast-paced, client-facing environments
• Excellent communication and collaboration skills
• Adaptability to changing requirements and priorities
• Team player
• Proactiveness in collaboration and execution
• Flexibility to switch technical context
• Willingness to learn new methods/tools/processes
• Ability to prioritize, multitask, and take ownership
• Strong problem-solving and critical-thinking skills
• Strong communication and interpersonal skills

• The annual salary range for this role is $160,000-$190,000.
• The Annual Salary depends upon various job-related factors such as professional background, training, work experience, location, business needs, and market demand. This range is subject to change and may be modified in the future.
• Sigma Connectivity, Inc. also offers a comprehensive benefits package that includes the following:
• Paid Time off/Vacation and Paid Holidays
• 401(k)
• 401(k) matching
• Life insurance
• Flexible Spending Account (FSA): Healthcare and Dependent Care
• Health Savings Account (HSA)
• Employee Assistance Program
• Employee and Customer Referral Program
• For positions in California, long-term and short-term disability insurance

Audio and Acoustics Systems Integration Engineer

Sigma Connectivity Inc.

Bay Area, CA, United States

2026-08-19