Jobs in the United States

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AB
Systems Engineer - HPC and GPU Infrastructure
Absolute Business Solutions Corp
Bethesda, MD
- $90,000 to $170,000 USD / year
ABSC has an exciting opening for a TS/SCI-cleared Systems Engineer specializing in high-performance computing and GPU infrastructure supporting DIA-NDOC under the DTP contract. You will…
Added just now
AB
Senior Product Owner
Absolute Business Solutions Corp
Bethesda, MD
- $135,000 to $245,000 USD / year
Experience as a Technical Product Owner, Development Team Lead, Systems Engineer, or similar leader within an Agile software-development team.
Added just now
AB
Product Owner
Absolute Business Solutions Corp
Bethesda, MD
- $110,000 to $225,000 USD / year
…design, engineering, development, and deployment of mission software for DIA-NDOC under the DTP contract. You will lead an Agile application team and work with Government leads, the Lead…
Added 1 min ago
Test Engineer TS SCI
Northrop Grumman
Stafford, VA
Northrop Grumman, Defense Systems, is seeking an Associate Test Engineer to work on the Whisper program in Stafford, Virginia. The Whisper program is a large Antenna based RF Transmission…
Added 1 min ago
C
BAS/BMS Controls Engineer
Carrier
Glen Allen, VA
- $64,500 to $129,500 USD / year
As a Controls Engineer, you’ll be an expert voice on-site- performing difficult and complex engineering activities and creating standard work for common procedures.
Added 1 min ago
HA
Facilities Mechanical Engineer - HSC
Howmet Aerospace
Hampton, VA
- $90,000 to $115,000 USD / year
Howmet Aerospace’s Hampton Structural Castings (HSC) is seeking a Facilities Mechanical Engineer who has a demonstrated ability to achieve results, as well as the passion to put that…
Added 1 min ago
Model-Based Systems Engineer
Lockheed Martin
Manassas, VA
Cross-Functional Coordination: Collaborate with hardware/software/test engineers and naval stakeholders to align MBSE models with integration requirements, ensure onboard compatibility, and…
Added 1 min ago
Full Stack Software Engineer/Developer
CACI International
Sterling, VA
Job Title: Full Stack Software Engineer/Developer
Added 1 min ago
Software Developer – Entry Level (Top Secret Clearance Required)
CGI Technologies and Solutions, Inc.
Fairfax, VA
As an Entry Level Software Developer, you’ll work with cross functional teams to design, build, test, and enhance technology solutions that address client needs. You’ll gain hands‑on…
Added 2 mins ago
Staff Principal Systems Engineer 5
Northrop Grumman
Charlottesville, VA
Northrop Grumman is seeking a Staff Principal Systems Engineer Level 5 to join our team of qualified, diverse individuals. The Marine Systems organization, part of Northrop Grumman Mission…
Added 2 mins ago
Senior Specialist, Technical Trainer/ Mission Operations Trainer
L3Harris
Chantilly, VA
Job Title: Senior Specialist, Integration & Test Engineer
Added 2 mins ago
Mission Operations Engineer (Entry-Level) - Millennium Space Systems
The Boeing Company
Chantilly, VA
As a Mission Operations Engineer, you will be the lead technical authority for Millennium’s on-orbit spacecraft. Your work will encompass the entire spacecraft mission life cycle, from the…
Added 2 mins ago
Senior Electrical Engineer, Data Center Engineering - Electrical Products and Services (DCE-EPS)
Amazon
Herndon, VA
You'll join a diverse team of software, hardware, and network engineers, supply chain specialists, security experts, operations managers, and other vital roles. You'll collaborate with…
Added 2 mins ago
Engineer IV
General Atomics
Herndon, VA
…board functional testing, firmware development, and associated test-software…
Added 2 mins ago
Jr. Software Test & Evaluation Engineer (Cleared) - 30980
Huntington Ingalls Industries
Virginia Beach, VA
HII’s System Integration group is seeking a Software Test Engineer to join our Integrated Training Systems Software Development team. This full-time, on-site position is located in Virginia…
Added 2 mins ago
Senior Human Factors Engineer (HFE)
The MITRE Corporation
McLean, VA
MITRE’s Human-Systems Integration (HSI) and User Experience (UX) department is seeking a Senior Human Factors Engineer (HFE) who is passionate about designing and developing user-centered…
Added 2 mins ago
Data Engineer 4 (Python, AWS, SQL, GenAI) (Enterprise Platforms Technology)
Capital One
McLean, VA
Collaborate with and across Agile teams to design, develop, test, implement, and support technical solutions in full-stack development tools and technologies
Added 2 mins ago
Human Factors Engineer (HFE) Lead
The MITRE Corporation
McLean, VA
MITRE’s Human-Systems Integration (HSI) and User Experience (UX) department is seeking a Lead Human Factors Engineer (HFE) who is passionate about designing and developing user-centered…
Added 2 mins ago
Senior Quality Engineer SDET
Hilton
McLean, VA
…hospitality industry around the world! As a Senior Quality Engineer SDET , you will bring your technical skills to a hospitality company with an award-winning culture. On the Quality…
Added 2 mins ago
Marine Engineer (Auxiliary & Fluid Systems) - Arlington, VA
Serco
Norfolk, VA · Arlington, VA · Newport News, VA · Alexandria, VA · Herndon, VA
The Maritime Engineering Operation (MEO) of Serco North America is seeking a motivated and experienced Marine Engineer to join our team working in our Arlington, VA location. MEO supports…
Added 2 mins ago
AI-Native Software Engineer Advisor Senior
Elevance Health
Richmond, VA
The AI-Native Software Engineer Advisor Senior will be responsible for shipping, evaluating, securing, and supporting real systems. The ideal candidate is a strong engineer who has real…
Added 2 mins ago
Integration Engineer 4 (MAC)
Capital One
McLean, VA · Richmond, VA
Capital One is looking for a Lead Integration Engineer to join our growing Mac Engineering team. The platform has grown to support over 40,000 endpoints in recent years, as one of the…
Added 2 mins ago
Global Red Team Senior AI Engineer, Vice President
MUFG Bank, Ltd.
Jersey City, NJ · Tempe, AZ
Integrate AI red team findings into enterprise risk, validation, remediation, and re-test workflows.
Added 2 mins ago
Director, Full Stack Engineer
Capital One
McLean, VA · Richmond, VA
As a Director, Full-stack Engineer at Capital One, you will lead high-performing engineering teams working to define the future of banking in the cloud. You will partner closely with…
Added 2 mins ago
Software Engineer 2
Humana
Richmond, VA
The Software Engineer 2 develops, tests, and maintains software applications that support business and technology objectives. The associate works on moderately complex assignments,…

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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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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