Jobs in the United States

25+ jobs

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RH
Software Engineer
Robert Half
Orlando, FL
- $80 to $85 USD / hour
We are looking for a Software Engineer to join the client’s engineering team within Workforce Technology. This role will play a key role in designing, building, and supporting the…
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RH
Systems Engineer - OEM Products
Robert Half
Lavergne, TN
- $130,000 to $150,000 USD / year
Our client is seeking a highly skilled Systems Engineer to bring formal systems engineering expertise and best practices into a growing product development organization.
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Senior Mechanical Engineer - Buildings
WSP
Roseville, CA
WSP is currently initiating a search for a Senior Mechanical Engineer for our Roseville, CA office to join our Property & Buildings team.
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EHS Specialist II - Environmental Compliance
Relativity Space
Cape Canaveral, FL
Balance time between program development and in-field support, helping to build on our positive EHS culture through visibility and availability.
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Engineering Manager - Palo Alto, US (hybrid)
Nubank
Palo Alto, CA
We strive for state-of-the-art software development practices, that currently includes a variety of technologies. While we value candidates that are familiar with them, we are also…
Added 1 min ago
Sr Software Engineer
Gartner
Irving, TX · Stamford, CT
This Senior Software Engineer role is a core individual contributor on one of three Scrum teams within the Peer Community product organization in Digital Product Technology (DPT). You will…
Added 1 min ago
RH
Cloud Engineer
Robert Half
Memphis, TN
- $70 to $85 USD / hour
Job Summary We are seeking a skilled Cloud Engineer to design, implement, manage, and optimize cloud-based infrastructure and services across enterprise environments. The ideal candidate…
Added 1 min ago
RH
Software Engineer
Robert Half
Memphis, TN
- $70 to $85 USD / hour
Software Engineer - .NET Developer Job Summary We are seeking a highly skilled Software Engineer (.NET Developer) to design, develop, test, and maintain scalable enterprise applications…
Added 2 mins ago
Radiation Therapist
Confluence Health
Wenatchee, WA
…and/or ancillary personnel and may be required to assist in the development of new techniques for simulations and/or treatments, in the use of new equipment and the development of new…
Added 2 mins ago
Chemical Engineer I
Stefanini Group
Southfield, MI
Stefanini is looking for a Chemical Engineer I in Southfield, MI 48033
Added 2 mins ago
HB
Front End Software Engineer
HIGH BRIDGE CONSULTING LLC
Vienna, VA
- $100,000 to $140,000 USD / year
The Software Engineer / Technical Delivery Lead will provide hands-on software development and drive technical delivery for a suite of applications supporting a federal project. The role…
Added 2 mins ago
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Water-Wastewater Engineer
GPAC
Seattle, WA
- $100,000 to $135,000 USD / year
We are seeking a Water/Wastewater Engineer to join a growing, multi-disciplinary engineering consulting firm. This individual will contribute to the planning, design, and delivery of…
Added 2 mins ago
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Civil Design Engineer
GPAC
Phoenix, AZ
- $80,000 to $90,000 USD / year
We are seeking a talented and motivated Civil Design Engineer to join our growing team. This individual will be responsible for the design and development of land development and…
Added 3 mins ago
Mechanical Design Engineer
Actalent
Torrance, CA
Job Title: Mechanical Design EngineerJob DescriptionThe Mechanical Design Engineer creates accurate, parametric CAD models and detailed drawings for complex manufactured hardware across…
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Maintainability Engineer
Actalent
Greensboro, NC
As an experienced Maintainability Engineer, you will monitor and analyze vehicle maintenance data to identify trends and patterns and recommend corrective actions as necessary. You will…
Added 3 mins ago
A
Senior Mechanical Design Engineer
Actalent
Marietta, OH
- $50.48 to $72.11 USD / hour
Senior Mechanical Design EngineerJob DescriptionThe Mechanical Design Engineer leads the design and development of custom-engineered industrial equipment and integrated systems within a…
Added 3 mins ago
Mechanical Product Design Engineer I
Detroit Diesel Corporation
Detroit, MI
…transmission, axle, fluids and electronic component research and development. Our team focuses on validation of transmissions and (e)Axle and their fluids. This team takes pride in our…
Added 3 mins ago
A
Electrical Engineer
Actalent
Melville, NY
- $100,000 to $125,000 USD / year
Job Title: Electrical EngineerJob DescriptionThe Electrical Engineer develops concepts, designs, and documentation for electrical power distribution, control, and instrumentation systems…
Added 3 mins ago
A
Packaging Engineer
Actalent
East Hanover, NJ
- $43.26 to $45 USD / hour
Job Title: Packaging EngineerJob DescriptionAs a Packaging Engineer, you will be responsible for the development and deployment of packaging solutions, specifically in a fast-moving…
Added 3 mins ago
Mechanical Engineer
Actalent
Whippany, NJ
Job Title: Mechanical EngineerJob DescriptionThis Mechanical Engineer role focuses on designing and analyzing components and assemblies for aerospace applications, ensuring reliable…
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A
Electronics Engineer
Actalent
Melbourne, FL
- $70 to $85 USD / hour
Job Title: Senior Electrical Engineer High-Speed Digital HardwareJob DescriptionThis Senior Electrical Engineer role focuses on leading the design, development, integration, and validation…
Added 3 mins ago
A
Test Rngineer
Actalent
Merritt Island, FL
- $36 to $43 USD / hour
Job Title: Integration and Test EngineerJob DescriptionThe Integration and Test Engineer defines, documents, analyzes, performs, and interprets tests for products, systems, components, and…
Added 3 mins ago
Mechanical Design Engineer
Actalent
Raleigh, NC
NOW HIRING: Mechanical Design EngineerWe are seeking an experienced Mechanical Design Engineer to support the design, development, validation, and release of industrial Ethernet networking…
Added 3 mins ago
A
SECOND SHIFT- MANUFACTURING ENGINEER
Actalent
Charlotte, NC
- $45 to $46 USD / hour
Job Title: Manufacturing Engineer SupervisorJob DescriptionThis role is responsible for leading daily operations across air-cooled chiller assembly lines within the value stream. The role…
Added 3 mins ago
Design Manager
Actalent
Marietta, OH
Experience in manufacturing or engineer-to-order environments.

Modem System Test Engineer - Wireless Technologies and Ecosystems |

CA, United States

The base pay range for this role is between $150,400 and $277,600, and your base pay will depend on your skills, qualifications, experience, and location.

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Job details

Pay: The base pay range for this role is between $150,400 and $277,600, and your base pay will depend on your skills, qualifications, experience, and location.
Posting language: English
Posted: Nov 6, 2026

Original job description

Summary Join the Wireless Technologies and Eco-Systems (WTE) team and drive wireless innovations that impact millions of users worldwide! We design, validate, and integrate cutting-edge wireless technologies that enrich everyday experiences across our entire product ecosystem.

We are seeking a passionate, detail-oriented Modem Systems Test Engineer with a focus on Wireless Coexistence (COEX). In this role, you will be at the forefront of validating multi-radio platforms ensuring seamless concurrent operation between cellular technologies (LTE, 5G NR FR1/FR2) and adjacent radios such as Wi-Fi, Bluetooth, Ultra-Wideband (UWB), and GNSS. If you thrive in a fast-paced environment solving complex cross-radio interference, desense, and protocol arbitration challenges, we would love to hear from you.

Description In this role, you will be responsible for end-to-end system testing, performance characterization, and failure triage of advanced cellular baseband and multi-radio coexistence features. You will bridge baseband protocol software, RF hardware, and connectivity systems to guarantee robust real-world performance under hostile interference conditions.

You will rely on deep trace analysis, lab simulation, RF instrumentation, and automation to uncover edge-case performance degradation, desense mechanisms, and protocol timing collisions. Working cross-functionally with system architecture, firmware, protocol development, RF design, and carrier engineering, you will drive test coverage, root-cause complex issues, and influence system-level mitigation designs.

Responsibilities

Coexistence Test Design & Execution: Define, develop, and execute comprehensive test plans targeting in-device coexistence (IDC), inter-radio arbitration, multi-SIM / multi-active scenarios, and concurrent multi-band operation (LTE/5G NR with Wi-Fi, Bluetooth, UWB, and GNSS).

RF & Protocol Root-Cause Analysis: Analyze baseband protocol traces (PHY, MAC, RLC, PDCP, RRC), air-interface captures, and RF measurements to root-cause desense, throughput degradation, scheduling conflicts, dropped calls, and handover anomalies.

Mitigation & Feature Validation: Evaluate and validate dynamic coexistence mechanisms, including power back-off, time-division multiplexing (TDM) / frequency-division multiplexing (FDM) filtering, antenna switching/sharing, and adaptive link management.

Intelligent Test Automation: Develop robust, scalable test automation scripts and post-processing analytics pipelines in Python to automate test execution, KPI aggregation (BLER, throughput, latency), and anomaly detection.

Testbed & Environment Integration: Set up, calibrate, and maintain sophisticated lab testbeds incorporating cellular network emulators (call boxes), RF matrix switches, combiners, spectrum analyzers, and wireless channel emulators.

Cross-Functional Collaboration: Partner closely with baseband firmware, connectivity software, RF systems engineering, and hardware teams to reproduce lab/field defects, validate fixes, and verify 3GPP and internal performance specifications.

Minimum Qualifications Education: Bachelor’s or Master’s degree in Electrical Engineering, Computer Engineering, Telecommunications, or a related field.

Cellular Protocol Stack Expertise: Deep technical understanding of 3GPP LTE and 5G NR (Rel-15/16+) across Layer 1 (PHY), Layer 2 (MAC/RLC/PDCP), and Layer 3 (RRC/NAS).

Coexistence & RF Fundamentals: Strong grasp of RF transceiver architectures, in-device coexistence (IDC), antenna isolation, harmonics, intermodulation distortion (IMD), receiver desense, and multi-radio interference mitigation techniques.

Hands-on Validation Experience: Proven track record of system test, integration, or validation using commercial wireless network emulators (e.g., Keysight, Rohde & Schwarz, Anritsu) and RF instrumentation (spectrum analyzers, signal generators, power meters).

Automation & Scripting: Strong proficiency in Python for test automation, instrument control (SCPI/VISA), and automated parsing/analysis of large log datasets.

Analytical Problem Solving: Demonstrated capability to triage and root-cause multi-layer failures across hardware, firmware, and protocol interactions.

Preferred Qualifications Prior experience testing Dual-SIM / Dual-Active (DSDS/DSDA) or complex Cellular scenarios with simultaneous connectivity radios. Working knowledge of 3GPP in-device coexistence specifications (e.g., Rel-11+ IDC mechanisms, autonomous denial, auxiliary information reporting). Experience with non-cellular wireless standards (Wi-Fi 6/6E/7 - 802.11ax/be, Bluetooth 5.x, UWB, NFC, GNSS). Familiarity with data analysis and visualization libraries (Pandas, NumPy, Plotly/Matplotlib) for large-scale test KPI dashboards. Contributions to 3GPP standardization (RAN4, RAN5) or carrier certification testing for coexistence and performance. Proficiency in diagnosing complex system-level issues through lab/field experimentation, analytics, and log analysis. Excellent analytical & critical thinking skills, Excellent communication & interpersonal skills.

Pay & Benefits At Apple, base pay is one part of our total compensation package and is determined within a range. This provides the opportunity to progress as you grow and develop within a role. The base pay range for this role is between $150,400 and $277,600, and your base pay will depend on your skills, qualifications, experience, and location.

Apple employees also have the opportunity to become an Apple shareholder through participation in Apple’s discretionary employee stock programs. Apple employees are eligible for discretionary restricted stock unit awards, and can purchase Apple stock at a discount if voluntarily participating in Apple’s Employee Stock Purchase Plan. You’ll also receive benefits including: Comprehensive medical and dental coverage, retirement benefits, a range of discounted products and free services, and for formal education related to advancing your career at Apple, reimbursement for certain educational expenses - including tuition. Additionally, this role might be eligible for discretionary bonuses or commission payments as well as relocation. Learn more about Apple Benefits

Note: Apple benefit, compensation and employee stock programs are subject to eligibility requirements and other terms of the applicable plan or program.

EEO Statement Apple is an equal opportunity employer that is committed to inclusion and diversity. We seek to promote equal opportunity for all applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, Veteran status, or other legally protected characteristics. Learn more about your EEO rights as an applicant

Accessibility At Apple, we believe accessibility is a fundamental human right. You’ll find that idea reflected in everything here - in our culture, our benefits and our digital tools. By welcoming as many perspectives as possible, we help you build a career where you feel like you belong.

Learn about accessibility in Apple’s workplace

Learn about reasonable accommodations for job applicants

Application Deadline Apple accepts applications to this posting on an ongoing basis.

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More about this job

Skills

Hardware testing methods
Firmware
Root cause analysis
Test automation
Python
Electrical engineering
Computer engineering
NAS
Problem solving
Reporting
Data analysis
NumPy
Critical thinking
Communication skills
Interpersonal skills

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