Jobs in the United States

25+ jobs

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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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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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EHS Specialist II - Environmental Compliance
Relativity Space
Cape Canaveral, FL
…the ground up. Whether you’re in propulsion, manufacturing, software, avionics, or a corporate function, you’ll collaborate across teams, shape decisions, and see your work come to life in…
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Senior DevOps Engineer
PathAI
Boston, MA
…set technical direction for how we build, test, and release software, and partner closely with our product and integration engineering teams, embedding with them when a project calls for…
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Mechanical Project Manager
GPAC
Chicago, IL
- $110,000 to $150,000 USD / year
Bachelor's degree in Construction Management, Mechanical Engineering or a related field
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Lead Industrial Construction Estimator
GPAC
Longview, WA
- $160,000 to $200,000 USD / year
…pricing strategies, and collaborate with project management, engineering, procurement, and construction teams to support successful project execution and…
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IT Administrator / Network Support
TEKsystems
Bellevue, WA
- $40 to $50 USD / hour
…between hands-on desktop support (JAMF, Intune) and core network engineering (switching, routing, Wi-Fi, and Meraki portal management) for a growing office. You will be supporting several…
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Lead Industrial Construction Estimator
GPAC
Castle Rock, WA
- $160,000 to $200,000 USD / year
…pricing strategies, and collaborate with project management, engineering, procurement, and construction teams to support successful project execution and…
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Lead Industrial Construction Estimator
GPAC
Winlock, WA
- $160,000 to $200,000 USD / year
…pricing strategies, and collaborate with project management, engineering, procurement, and construction teams to support successful project execution and…
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Lead Industrial Construction Estimator
GPAC
Toledo, WA
- $160,000 to $200,000 USD / year
…pricing strategies, and collaborate with project management, engineering, procurement, and construction teams to support successful project execution and…
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Engineering Manager - Palo Alto, US (hybrid)
Nubank
Palo Alto, CA
- Experience leading Engineering teams, ideally with a background as a software engineer or software architect
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Mechanical Assistant Project Manager
GPAC
Chicago, IL
- $65,000 to $90,000 USD / year
Bachelor's degree in Construction Management, Engineering or a related field
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Senior Mechanical Project Manager
GPAC
Chicago, IL
- $130,000 to $170,000 USD / year
Bachelor's degree in Construction Management, Mechanical Engineering or a related field
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Lead Industrial Construction Estimator
GPAC
Chehalis, WA
- $160,000 to $200,000 USD / year
…pricing strategies, and collaborate with project management, engineering, procurement, and construction teams to support successful project execution and…
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Mechanical Project Manager
GPAC
Minneapolis, MN
- $100,000 to $135,000 USD / year
Bachelor's degree in Construction Management, Mechanical Engineering or a related field
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Mechanical Estimator
GPAC
Chicago, IL
- $90,000 to $125,000 USD / year
Bachelor's degree in Construction Management, Mechanical Engineering or a related field
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Quality Control -CMM
GPAC
Yonkers, NY
- $80,000 to $100,000 USD / year
…CNC-machined parts, ensuring compliance with customer requirements, engineering drawings, and industry…
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Lead Industrial Construction Estimator
GPAC
Tumwater, WA
- $160,000 to $200,000 USD / year
…pricing strategies, and collaborate with project management, engineering, procurement, and construction teams to support successful project execution and…
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Quality Assurance Manager
BERNATELLO'S PIZZA INC.
Waupaca, WI
Proficient in Microsoft Office suite, basic experience with laboratory software and manufacturing database.
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IT Recruiter
Robert Half
Minneapolis, MN
- $45 to $55 USD / hour
Build and maintain candidate pipelines for positions such as product managers, designers, information security specialists, cloud professionals, and software engineering talent.
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Technical Customer Support Lead
Robert Half
Auburn, NH
3+ years of experience in technical support, software support, or service desk operations within a fast-paced environment.
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Lead Industrial Construction Estimator
GPAC
Olympia, WA
- $160,000 to $200,000 USD / year
…pricing strategies, and collaborate with project management, engineering, procurement, and construction teams to support successful project execution and…
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Lead Industrial Construction Estimator
GPAC
Dupont, WA
- $160,000 to $200,000 USD / year
…pricing strategies, and collaborate with project management, engineering, procurement, and construction teams to support successful project execution and…
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Mechanical Project Manager
GPAC
Houston, TX
- $110,000 to $140,000 USD / year
Bachelor's degree in Construction Management, Mechanical Engineering or a related field
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Mechanical Estimator
GPAC
Saint Louis, MO
- $85,000 to $115,000 USD / year
Bachelor's degree in Mechanical Engineering or Construction Management

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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