Jobs in the United States

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Added 1 min ago
Software Engineer II, Fintech
Twitch
San Francisco, CA
Twitch's Enterprise Platform & Technology (EPT) organization is looking for a Software Development Engineer II to build agentic AI systems on AWS that power Finance and enterprise functions…
Added 1 min ago
Summer 2027 AI Full Stack Developer Consulting Intern
Elire
Minneapolis, MN
The AI Full Stack Developer Consulting Intern will focus on building and reviewing software in an AI-enabled development environment. This role is designed for a strong programmer who can…
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Association Coordinator (JellyBird Brand) - (Dallas, San Antonio, Georgetown, Houston TX, Chandler AZ offices) - We Are Growing! Come Join the Team!
SpectrumAM
Dallas, TX · Fort Worth, TX · Houston, TX · Katy, TX · Austin, TX · Plano, TX · San Antonio, TX · Georgetown, TX · Chandler, AZ
- $52,500 USD / year
Experience and knowledge of Office software (Word, Excel, PowerPoint, etc.)
Added 3 mins ago
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Community/Property Manager - HOA Managed Communities (Portfolio manager)
SpectrumAM
San Antonio, TX
- $57,500 USD / year
Experience and knowledge of Office software (Word, Excel, PowerPoint, etc.)
Added 3 mins ago
Assistant Store Manager - Banter by Piercing Pagoda - Northwoods Mall
Zale Delaware, Inc.
North Charleston, SC
Knowledge of operating POS terminals and scanners, using basic computer software and hardware
Added 3 mins ago
Assistant Store Manager - Banter by Piercing Pagoda - Tanger Outlet Center - Charleston
Zale Delaware, Inc.
Banter by Piercing Pagoda North Charleston, SC
Knowledge of operating POS terminals and scanners, using basic computer software and hardware
Added 3 mins ago
Assistant Store Manager - Banter by Piercing Pagoda - The Centre at Salisbury
Zale Delaware, Inc.
Salisbury, MD
Knowledge of operating POS terminals and scanners, using basic computer software and hardware
Added 4 mins ago
Jr. Data Engineer
Amentum
Springfield, VA
…your skills in data engineering, cloud platforms, and secure software…
Added 4 mins ago
Senior UI/UX Designer
Amentum
Merrifield, VA · Arlington, VA
Day shift, Monday through Friday · Office environment, light physical demands, must have ability to attend to mental tasks for the duration of the workday
Added 4 mins ago
Senior UI/UX Designer
Amentum
Merrifield, VA · Arlington, VA
Day shift, Monday through Friday · Office environment, light physical demands, must have ability to attend to mental tasks for the duration of the workday
Added 5 mins ago
Software Development Engineer - Developer Platform
Workday, Inc.
CO
As a Software Engineer on the Developer Platform team, you will build and improve the front-end surfaces and developer tooling that make up the Workday Developer Portal. You will execute…
Added 5 mins ago
Software Development Engineer - US Federal
Workday Government, LLC
United States
4+ years experience with UML, Web application development or SaaS (Software as a Service) technologies
Added 5 mins ago
Digital Engineer
MANTECH
Remote, United States
8+ years as a system engineer, data engineer or software developer or other related areas such as experience in software engineering, full-stack application development, or AI/ML systems…
Added 5 mins ago
Digital Engineer
MANTECH
Remote, United States
10+ years of experience in software and/or site development and administration
Added 6 mins ago
Solution Architect, Global Supply Chain
Roche
Indianapolis, IN
Formulate and articulate a compelling, long-term technical vision for our supply chain infrastructure, ensuring software systems scale seamlessly with product portfolio growth.
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Fuels Technical Specialist
BBCH
San Antonio, TX · Knoxville, TN
- $100,000 to $130,000 USD / year
…proposals, and related documents, and transferring data into software for review with…
Added 8 mins ago
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Fuels Technical Specialist
BBCH
San Antonio, TX · Knoxville, TN
- $100,000 to $130,000 USD / year
…proposals, and related documents, and transferring data into software for review with…
Added 8 mins ago
Application Security Engineer
The Northern Trust Company
Tempe, AZ
Experience working with source control, CI/CD, cloud services, developer tooling, enterprise platforms, or comparable software-delivery technologies.
Added 9 mins ago
Casual Hire – Director of Volleyball Operations (DOVO)
University of Hawaii
Honolulu, HI
Assist in inputting current and accurate team information in ARMS software and management of compliance software;
Added 9 mins ago
TG
Office Manager/Coordinator
The Glass Guru of Provo, UT
Provo, UT
- $17 to $20 USD / hour
Schedule and coordinate customer estimates, installations, follow-ups, and service appointments using scheduling software
Added 9 mins ago
Store Manager
Walgreens
BRYAN, TX
Ensures staff has working knowledge of all computer and technology systems and software (e.g. registers, StoreNet, Intercom+, etc. Ensures response to all systems problems by contacting…
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Pharmacist
Walgreens
KANSAS CITY, MO
- $60.9 to $82.3 USD / hour
…records and legal compliance, pharmacy operations, pharmacy software and technology systems and…
Added 9 mins ago
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Pharmacist
Walgreens
BOISE, ID
- $60.9 to $82.3 USD / hour
…records and legal compliance, pharmacy operations, pharmacy software and technology systems and…
Added 9 mins ago
Darwin Runtime Engineer, Core OS
Apple
Cupertino, CA
…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…
Added 9 mins ago
Data Architect
Node.Digital
McLean, VA
Must have an active TS/SCI FS Poly

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