Jobs in the United States

25+ jobs

Group jobs by employerEmail me new jobs Save this search

Added just now
Staff /Sr. Staff Test Platform & Firmware Integration Engineer
Lightmatter
Mountain View, CA
Hardware-in-the-loop test experience with real devices under test, fixtures, and instruments, including fault injection and negative testing
Added 7 mins ago
LCTMK, RANGE INTEGRATION, AND IN-TUBE-CONVERSION LEAD ENGINEER
Strategic Systems Programs Office
Washington Navy Yard, DC
In either above, the courses must have included a fundamental course in general physic
Added 8 mins ago
Senior Capital Program Manager, Design & Configuration Management
Washington Metropolitan Area Transit Authority
Washington, DC
…oversight of design, procurement, construction, system integration, testing and turn-over activities as applicable. The incumbent establishes and maintains effective working relationships…
Added 8 mins ago
Mechanical Engineer
Washington Metropolitan Area Transit Authority
Washington, DC
The Washington Metropolitan Area Transit Authority (WMATA) is seeking an experienced Mechanical Engineer to join the Architecture & Facilities Engineering (AFE) Department. In this role,…
Added 8 mins ago
Senior Electronic Test Engineer
Acuity Inc.
Washington, MO
We are seeking a dynamic and passionate Manufacturing Electronic Test Engineer to lead the support of our production as well as the development and deployment of test equipment. In this key…
Added 12 mins ago
Senior Software Engineer, Interfaces and Contracts, Amazon LEO, D2D Software
Amazon Kuiper Manufacturing Enterprises LLC
Redmond, WA
…Architect, Software Architecture & Specifications. It owns hardware and software contracts, supplier interfaces, command dictionaries, and the telemetry and metadata contract. Before…
Added 16 mins ago
Senior Principal RF Thermal Analyst-Marlborough, MA
RTX
United States
Qualifications You Must Have
Added 16 mins ago
Vision Systems - Senior Test Engineer
RTX
United States
Qualifications You Must Have
Added 16 mins ago
Vision Systems - Principal Systems/Test Engineer
RTX
United States
Qualifications You Must Have
Added 16 mins ago
Senior System Engineer
RTX
United States
Qualifications You Must Have:
Added 19 mins ago
R&D Engineer - Product Development, MedTech
AtriCure
Mason, OH
…technologies within AtriCure's product development organization. The engineer will work within a cross-functional team environment and be expected to own designated workstreams from concept…
Added 20 mins ago
Senior Flight Harness Design Engineer
Castelion Corporation
Torrance, CA · Torance, CA
We are seeking a Senior Flight Harness Design Engineer to lead the design, development, and integration of electrical harnessing across our missile and vehicle systems. This engineer will…
Added 23 mins ago
Engineer/Principal Engineer Systems Test (AHT)
Northrop Grumman
Rolling Meadows, IL
Candidates may be hired as a Engineer Systems Test (level 2) or a Principle Engineer Systems Test (level 3) based on their qualifications. This position is part of our Space Sector Eastern…
Added 28 mins ago
Hardware Development Engineer
Rubrik Job Board
Palo Alto, CA
The Senior Hardware Engineer will implement hardware development programs from inception to product shipment. Will work with Rubrik’s operations team and Server OEMs to develop, support,…
Added 31 mins ago
B&
Associate SCADA Engineer - Renewables & Grid
Black & Veatch Family of Companies
Irvine, CA
- $95,186 to $158,965 USD / year
The Associate SCADA Engineer works as part of an experienced, multidisciplinary project team, applying established engineering standards and procedures while developing technical expertise…
Added 34 mins ago
L
Staff Mechanical Engineer
Lumafield
Boston, MA
- $150,000 to $190,000 USD / year
The Hardware Group is looking for a Staff Mechanical Engineer to set technical direction for the mechanical engineering domain within our Hardware Group. You'll shape the architectures…
Added 34 mins ago
Software Development Engineer in Test
Stored Energy Systems
Longmont, CO
We are looking for an experienced Software Development Engineer in Test (SDET) to join our engineering team. The SDET will be responsible for designing, developing, and maintaining an…
Added 38 mins ago
2027 Summer Embedded SW Engineering Intern
Motorola Solutions, Inc.
Schaumburg, IL
You must possess knowledge in (or an interest in) microprocessor-based hardware design
Added 39 mins ago
Software Quality Assurance Engineer
ThinKom Solutions
Hawthorne, CA
Hardware-in-the-Loop (HIL) Testing: Execute hardware-in-the-loop (HIL) integration testing using laboratory equipment, including spectrum analyzers, oscilloscopes, signal generators, and…
Added 56 mins ago
Sr Assoc Field Engineering
L3Harris
Tulsa, OK
Closely integrate with multiple engineering development teams, adding subject-matter expertise during the requirements, design, testing and implementation phases of hardware and software.
Added 1 hour ago
P
Senior Production Test Engineer
PrideStaff
San Jose
- $120,000 to $140,000 USD / year
Experience: At least 5+ years of direct test engineer experience
Added 1 hour ago
I
Electrical Engineer - IRL
Interlune
Houston, TX
- $90,000 to $120,000 USD / year
As an Electrical Engineer, this role will join Interlune’s engineering team and be responsible for the physical design, development, and implementation of the critical hardware that will…
Added 1 hour ago
Electrical Engineer III
Arcfield
Louisville, CO
The Electrical Engineer III provides technical solutions to complex engineering problems requiring a comprehensive understanding of electrical engineering principles. Working under general…
Added 1 hour ago
Senior Mechanical Design Engineer - Robotics & Automation
Valstad
Austin, TX
This is a hands-on engineering role spanning concept development, detailed mechanical design, prototyping, fabrication, testing, and deployment.
Added 1 hour ago
Associate HMI Design Engineer
Alpharetta, GA
As an Associate HMI Design Engineer, you will be responsible for designing, developing, modifying, and implementing software programming for generator control switchgear human-machine…

Infleqtion

Staff Systems Engineer (Time and Frequency)

Louisville, CO, United States

$160,000 to $210,000 USD / year

Apply on jobs.workable.com About employer

Applications open in a new tab.

Job details

Pay: $160,000 to $210,000 USD / year
Posting language: English
Posted: Sep 23, 2026

Original job description

Infleqtion is a global quantum technology company solving the world’s most challenging problems. The company harnesses quantum mechanics to build and integrate quantum computers, sensors, and networks. From fundamental physics to leading edge commercial products, Infleqtion enables “quantum everywhere” through our ecosystem of devices and platforms. As a deep-tech startup, Infleqtion embraces a results-driven, fast-paced, and customer-focused approach to innovation. We seek an experienced Staff Systems Engineer to support multidisciplinary government and commercial R&D projects. The duties and responsibilities below describe the expected scope of ownership. Depending on business needs, this role may perform a combination of some or all of the following duties; additional duties may arise.

Own and manage system requirements for Time & Frequency products and programs, including customer requirement review, internal decomposition, traceability, and alignment across engineering teams.
Maintain Jama or equivalent requirements-management tools as the source of truth for customer requirements, derived requirements, verification methods, requirement status, version control, and change history.
Own and manage interface control documentation (ICDs), including source-of-truth documentation, revision control, and coordination across the physics package, lasers and optics, electronics, FPGA/firmware, software, mechanical, thermal, command-and-telemetry, and customer teams.
Lead verification and validation planning by mapping requirements to verification methods, defining evidence needs, coordinating test-plan inputs, and ensuring customer-facing V&V documentation is complete, consistent, and review-ready.
Coordinate with AI&T leads and technical teams to define, document, and oversee integration and test activities from subsystem through full-system level, including capture of performance data and preparation of results for internal and customer review.
Own the quality and readiness of customer-facing systems-engineering documentation, including templates, folder structure, revision control, release status, and delivery readiness.
Author major systems-engineering documents and assign technical sections to subject-matter experts as needed, including requirements documents, ICDs, system architecture documents, CONOPs, verification plans, test plans, design-review packages, and customer deliverables.
Drive Product Lifecycle execution for selected R&D, product-development, and customer programs by defining required deliverables, establishing review entry and exit criteria, preparing design-review packages, and tracking closure actions.
Work with the Chief Engineer and program leadership to establish a repeatable design-review structure, including standard review materials, required artifacts, action-item tracking, and customer-facing closure evidence.
Maintain the program risk register and support risk communication with program management and customers, including mitigation plans, assigned owners, schedule impacts, and linkage to technical decisions.
Support and maintain FMEA or similar failure-analysis documentation, ensuring identified failure modes are connected to requirements, design mitigations, test coverage, and program risks.
Own and maintain system CONOPs by working with physicists, subsystem leads, applications engineering, and customers to ensure operational concepts are consistent with system architecture, interfaces, operating modes, constraints, and intended use cases.
Own and maintain system architecture documentation for precision timing products, including functional allocations, subsystem responsibilities, timing and frequency-reference architecture, interfaces, operating modes, and change propagation across teams.
Own source-of-truth SWaP tracking by collecting updated size, weight, power, thermal, and environmental estimates from IPT leads; documenting assumptions and margins; and communicating impacts to architecture, requirements, risk, and customer deliverables.
Establish lean, right-sized systems-engineering processes suitable for deep-tech R&D, product development, and customer deployment without creating unnecessary process burden.
Ensure consistent use of systems-engineering tools and methods across selected programs, including requirements management, configuration control, document control, review readiness, traceability, and change management.
Bachelor's degree in engineering, science, physics, or a related technical field.
5+ years of progressive systems engineering experience with complex hardware/software systems, ideally including quantum systems, precision sensors, aerospace systems, spacecraft payloads, or other multidisciplinary R&D systems.
Demonstrated ability to own requirements from customer-level intent through internal decomposition, traceability, change control, and verification planning.
Experience developing or maintaining ICDs across electrical, mechanical, optical, software, command/telemetry, and customer interfaces.
Experience creating V&V plans, test plans, verification matrices, and customer-ready evidence packages for complex technical systems.
Experience with configuration management, document control, revision control, and formal technical review processes.
Ability to learn enough technical depth in complex physics, hardware, electronics, software, and integration/test systems to drive practical systems engineering decisions and keep teams aligned.
Demonstrated ability to work with engineers, physicists, program managers, customers, and subcontractors in a fast-paced, matrixed environment.
Professional-level written, verbal, and presentation skills, including the ability to turn incomplete technical inputs into clear customer-facing documentation.

Preferred skills:

Hands-on experience with Jama, DOORS, Polarion, or comparable requirements management and traceability tools.
Experience supporting government-funded R&D, NASA programs, aerospace payload development, or customer-facing technical reviews such as SRR, PDR, CDR, TRR, or equivalent gate reviews.
Experience managing FMEA, risk registers, action-item logs, design-review artifacts, or technical decision records.
Experience with AI&T, hardware bring-up, subsystem integration, environmental testing, qualification planning, or test readiness reviews.
Experience owning architecture diagrams, CONOPs, SWaP budgets, or interface documentation for systems involving sensors, lasers, electronics, software, controls, or telemetry.
Experience helping organizations implement lean Product Life Cycle or productization processes for R&D-to-product transition.
Salary Range: 160000 - 210000 per year
Comprehensive medical, dental, and vision coverage, including full-spectrum fertility support for growing families.
Employer-funded Health Savings Account
Unlimited PTO
401(k) match
Company-paid Life and AD&D Insurance
Flexible Savings Account
Paid FMLA, Maternity/Paternity Leave
Employee Assistance Program
Student Loan Repayment
Equity Program

Notice to Recruitment Agencies:

Infleqtion does not accept unsolicited resumes from agencies. Infleqtion is not responsible for any fees related to unsolicited resumes.

Apply on jobs.workable.com About employer

Report this job

Work requirements

Jobs in the United States