Jobs in the United States

25+ jobs

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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
DevOps Platform Engineer and Linux Systems Administrator
Absolute Business Solutions Corp
Bethesda, MD
ABSC has an exciting opening for a TS/SCI-cleared DevOps Platform Engineer and Linux Systems Administrator supporting DIA-NDOC’s D3P modernization under the DTP contract. You will operate…
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
Middleware Team Lead w/Secret Clearance
TekSynap
Radford, VA
Understanding of scripting and automation using Python and PowerShell.
Added 1 min ago
Cloud Engineer Senior w/Secret Clearance
TekSynap
Radford, VA
We are seeking a Cloud Engineer Senior to join our team supporting an ITES task order.
Added 1 min ago
Senior UNIX System Engineer w/Secret Clearance
TekSynap
Radford, VA
Five (5) years as a UNIX Systems Administrator or IT Engineer, including task automation.
Added 1 min ago
Senior Windows Administrator w/Secret Clearance
TekSynap
Radford, VA
Five (5) years as a Windows Systems Administrator or Engineer, including 3 years of task automation using PowerShell.
Added 1 min ago
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BAS/BMS Controls Engineer
Carrier
Glen Allen, VA
- $64,500 to $129,500 USD / year
As a Controls Engineer, you will be crucial to ALC’s business through the designing of advanced building automation systems created specifically for each individual customer. We are looking…
Added 1 min ago
Model-Based Systems Engineer
Lockheed Martin
Manassas, VA
Lockheed Martin Rotary & Mission Systems seeks a full-time Systems Engineer to support the AN/SQQ-89 Undersea Warfare Combat System using a rigorous MBSE (SysML-driven) approach. As an…
Added 1 min ago
AI/ML Engineering Director
General Dynamics Information Technology
Fairfax, VA
GDIT is seeking a Director-level AI/ML Engineer to support CCaaS & AI digital transformation initiatives across federal and public sector environments. This role combines hands-on…
Added 1 min ago
Senior Software Back End Engineer
General Dynamics Information Technology
Fairfax, VA
Amazon Web Services (AWS),Cloud Computing,Software Solutions
Added 1 min ago
Software Developer – Entry Level (Top Secret Clearance Required)
CGI Technologies and Solutions, Inc.
Fairfax, VA
Bachelor’s degree in Computer Science, Software Engineer or related field
Added 2 mins ago
Principal AI Platform and Model Operations Engineer - TS/SCI with Polygraph
General Dynamics Information Technology
Chantilly, VA
We are seeking a hands-on AI Platform Operations Engineer to own and mature the end-to-end platform and lifecycle mechanisms that move AI models, prompts, retrieval assets, dependencies,…
Added 2 mins ago
Senior Director Digital Native, Customer Engineering
Cloudflare
Austin, TX
…Internet application online without adding hardware, installing software, or changing a line of code. Internet properties powered by Cloudflare all have web traffic routed through its…
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
Site Reliability Engineer- TS/SCI w/poly
General Dynamics Information Technology
Chantilly, VA
Advance how our customers operate while you advance your career. Join GDIT as a Site Reliability Engineer tor and build an impactful career in enterprise IT, collaborating with people who…
Added 2 mins ago
Sr. Controls Engineer, Data Center, Colocation Regional Engineering - AMER
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
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
Technical Lead/Solution Architect
Guidehouse
MCLEAN, VA
…architecture, and engineering direction for a large-scale agile software development and platform modernization program supporting the GrantSolutions contract. This role is responsible for…
Added 2 mins ago
Automation Principal Engineer
Wells Fargo
MCLEAN, VA
Wells Fargo is seeking a Principal Engineer for Network Automation and Software development. The skills for this position are critical to build and deliver a successful plan and service…
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
Senior Software Engineer
EPAM Systems
McLean, VA
We are looking for engineers who are passionate about developer productivity, command-line tooling, software distribution, observability, and telemetry. You should be equally comfortable…
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
…simulation validation, AI security testing, and scalable tooling…

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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