Jobs in the United States

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Added 30 mins ago
Technical Specialist - Propulsion Hydraulics - Warren MI
Military Spouse Jobs & VetJobs
United States
We are looking for an experienced engineer to lead the virtual development of propulsion hydraulic systems. This person will help hardware teams make better design decisions for engine…
Added 1 hour ago
Electrical Design Drafter
Trane Technologies
Haslet, TX
…growth markets of AI and data centers. We are seeking a dynamic engineer to join our team and help us define and shape this new segment of our engineering…
Added 1 hour ago
Mechanical Design Drafter
Trane Technologies
Haslet, TX
…growth markets of AI and data centers. We are seeking a dynamic engineer to join our team and help us define and shape this new segment of our engineering…
Added 1 hour ago
IDCS Chief Engineer
Leidos
San Antonio, TX
Must have provenexpertiseleading, architecting,and executing large-scale development programs
Added 1 hour ago
Staff Software Engineer, Cortex AI Functions
Snowflake Inc.
Bellevue, WA
8+ years of relevant experience in software engineering, applied machine learning, or database systems, including independently leading multi-engineer projects from definition through…
Added 2 hours ago
Fluid Systems Engineer III – New Glenn Third Stage (GS3)
Blue Origin Personnel, LLC
Denver, CO
We are looking for a design engineer with experience in flight vehicle fluid systems to act as a Cognizant Engineer (CogE), supporting the development and delivery of a New Glenn upper…
Added 2 hours ago
Fluid Systems Engineer III - New Glenn Third Stage (GS3)
Blue Origin Personnel, LLC
Denver, CO
We are looking for a design engineer with experience in flight vehicle fluid systems to act as a Cognizant Engineer (CogE), supporting the development and delivery of a New Glenn upper…
Added 2 hours ago
TT
Product Engineer
True Talent Solutions Partners
San Francisco Bay Area, CA
- $185,000 to $485,000 USD / year
On-site five days per week in the San Francisco Bay Area
Added 3 hours ago
Darwin Runtime Engineer, Core OS
Apple
Cupertino, CA
…Central Dispatch (GCD), secure inter-process communication systems, memory allocator, threading library, and concurrency and synchronization primitives. The team operates at the…
Added 3 hours ago
Scientist, Systems Engineer
L3Harris Technologies
Chantilly, VA
Job Title: Scientist, Systems Engineer - TS/SCI
Added 3 hours ago
SSR Engineer - Federal
Hewlett Packard Enterprise
Herndon, VA
…designing, developing, analyzing, troubleshooting and debugging systems, software and solutions for research and/or research development of product, services, and solutions for HPE’s…
Added 4 hours ago
Senior Turbomachinery Aerodynamic Engineer
Air Products and Chemical
Bethlehem, PA · Houston, TX
This position follows a hybrid work arrangement with four days per week in the office and requires minimal travel, typically less than 10%
Added 5 hours ago
Principal Radar / RF Electrical Subsystems Engineer
RTX
United States
Qualifications You Must Have:
Added 5 hours ago
Software Engineering Intern (Summer 2027)
RTX
United States
Qualifications You Must Have
Added 5 hours ago
Sr. Principal Manufacturing Engineer (onsite)
RTX
United States
Qualifications You Must Have
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Software Engineer I (Onsite)
RTX
United States
Qualifications You Must Have
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Software Engineering Intern (Summer 2027)
RTX
United States
Qualifications You Must Have
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Software Engineer I (Onsite)
RTX
United States
Qualifications You Must Have
Added 5 hours ago
Design Engineering Manager
The businesses of Merck KGaA, Darmstadt, Germany
Austin, TX
Based in Austin, TX, the manager partners with Product Engineering, Manufacturing Engineering, Applications, Project Management, Supply Chain, Quality, and Operations across global sites.…
Added 5 hours ago
Design Engineering Manager
The businesses of Merck KGaA, Darmstadt, Germany
Chandler, AZ
Based in Chandler, AZ the manager partners with Product Engineering, Manufacturing Engineering, Applications, Project Management, Supply Chain, Quality, and Operations across global sites.…
Added 5 hours ago
Systems Engineer
BAE Systems
Nashua, NH · Manchester, NH
Job Description Thank you for your interest in BAE Systems! Are you a Systems Engineer with 2 to 20+ years of experience looking for the next step to grow your career? Do you want to…
Added 5 hours ago
Sr Systems Integration Engineer – Radiation Producing Subsystem
x Varian Medical Systems, Inc.
United States
We seek a versatile Systems Engineer for our Linear Accelerator Systems group, supporting radiation-producing subsystems in oncology machines. Responsibilities include contributing to…
Added 6 hours ago
Senior FPGA Digital Design & Development Engineer (Hybrid)
Cisco Systems, Inc.
Milpitas, CA · San Jose, CA
As a Senior FPGA Engineer in Cisco’s IoT team, you’ll develop capabilities that help industrial networks operate reliably, maintain precise timing, and recover from disruptions. Your…
Added 6 hours ago
Advanced Packaging Development Engineer
Apple
Santa Clara, CA
Apple’s Advanced Packaging team is seeking an experienced Packaging Development Engineer to drive next-generation packaging integration and technology development for future products. In…
Added 6 hours ago
Senior Cloud Developer
Hewlett Packard Enterprise
Ft. Collins, CO · Andover, MA
This role has been designed as 'Hybrid' with a requirement that you will work on average 2 days per week from an HPE office

Darwin Runtime Engineer, Core OS

Cupertino, CA, United States

The base pay range for this role is between $129,300 and $225,300, and your base pay will depend on your skills, qualifications, experience, and location.

Apply on jobs.apple.com About employer

Applications open in a new tab.

Job details

Pay: The base pay range for this role is between $129,300 and $225,300, and your base pay will depend on your skills, qualifications, experience, and location.
Experience: 0-3+ years of relevant industry experience in low level systems programming
Posting language: English
Posted: Nov 10, 2026

Original job description

Summary The people here at Apple don’t just build products, we build the kind of wonder that revolutionise entire industries. Imagine what you could do here! Do you have a passion for understanding how each line of code affects all the others? In the Core Operating Systems group ensuring the OS is inseparable from each device’s identity as a whole. That’s because this group is committed to building fully integrated operating systems that combine hardware, software, and apps into a single Apple experience. Your dedication to cross-disciplinary collaboration will help develop groundbreaking technologies, such as iOS, macOS, watchOS, and tvOS. By crafting these distinct, complete user experiences, you’ll continue to uphold and advance the excellence people expect from Apple devices! The Darwin Runtime team in Core OS is looking for enthusiastic engineers interested in developing low-level system technologies for Apple’s operating systems.

Description The Darwin Runtime team is responsible for building the low-level runtime technologies like Grand Central Dispatch (GCD), secure inter-process communication systems, memory allocator, threading library, and concurrency and synchronization primitives. The team operates at the intersection of operating systems, programming language design, systems security, and high-performance computing. As a Software Engineer on the team, you'll work closely with kernel engineers, security architects, and framework developers to deliver foundational technologies that enable Apple's next-generation computing platforms.The ideal candidate should be self-motivated and effective in operating independently, with a desire to learn and develop technical leadership. Team members are welcome and encouraged to participate in design discussions, code reviews, and development across multiple technologies. Our environment fosters technical innovation, meaningful technology ownership, and a liberating amount of autonomy.

Responsibilities

You will be responsible for working on a range of technologies that form the foundation of Apple’s operating systems. The work would include responsibilities such as: Design and implement new features and APIs for Darwin Runtime technologies like GCD, XPC, pthread, and malloc Design and implement IDL compiler frontend and backend systems, including lexical analysis, parsing, semantic analysis, and code generation for both C and Swift targets Develop and maintain high-performance runtime libraries that handle secure communication, memory management, and component lifecycle across different execution environments Optimize code generation, runtime performance, and memory usage to meet strict performance requirements for low-level systems

An engineer in the Secure Runtime team would regularly:

Participate in all phases of software development cycle: from problem definition and design, through implementation, testing, and debugging Diagnose and resolve issues across different layers of the stack Work with cross functional teams to enable developer and product requirements

Minimum Qualifications BS or MS in Computer Science or equivalent degree 0-3+ years of relevant industry experience in low level systems programming Passion for low-level system technologies Fluency in the C programming language Experience with UNIX-like systems System design and architecture skills Strong understanding of operating system fundamentals like threading, synchronization primitives, inter-process communication, scheduling, and virtual memory Excellent collaborative skills, with the ability to work with a team to design system architecture

Preferred Qualifications Experience with compiler design, including lexical analysis, parsing, semantic analysis, and code generation Knowledge of capability-based security models, sandboxing, and secure IPC mechanisms Knowledge of operating system implementation, hardware architecture and assembly programming Knowledge of Swift or Objective-C Skilled at interface and/or API design Experience with lldb or gdb

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 $129,300 and $225,300, 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.

Apply on jobs.apple.com About employer

More about this job

Skills

Oracle Darwin
Apple macOS
Communication skills
Leadership
IDL
C
Swift
Debugging
Computer science
UNIX
Scheduling
Assembly
Objective C
API development

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Work requirements

Jobs in the United States