Jobs in the United States

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Added 1 min ago
MT
Information Systems Security Officer (ISSO)
Modern Technology Solutions Inc
Dayton, OH · Dayton
- $120,000 to $140,000 USD / year
MTSI is seeking an Information Systems Security Officer (ISSO) to support a high-profile Air Force program at Wright Patterson Air Force Base, OH. This position requires travel of up to…
Added 1 min ago
Founding Software Engineer
Raydar
New York, NY
- 6 days per week in office
Added 3 mins ago
Lead Information Security Engineer - Cyber Defense
Fifth Third Bank, National Association
United States
The Lead Information Security Engineer (ISE) will help lead our software, platform, and site reliability engineering work with the detection, response, and threat intel analysts to build,…
Added 4 mins ago
Experienced Infra Technology Project Controls Engineer
Samsung Austin Semiconductor, LLC.
1530 FM 973 Taylor, TX
Samsung Austin Semiconductor is seeking an Infrastructure Project Controls Engineer to join the Infra Integration team. This is a high-visibility role that blends technical project…
Added 4 mins ago
U
Software Engineer II
Uber
San Francisco, CA · Sunnyvale, CA
- $171,000 to $190,000 USD / year
This role is on the Courier Pricing team within the Marketplace organization. As a Software Engineer II on the Courier Pricing team, you will interact with a wide range of data and analytic…
Added 4 mins ago
Pool Tecnician (Eng 1)
Pyramid Global Hospitality
Palm Coast, FL
· Must have knowledge in the proper operation & maintenance of pool equipment including automatic chlorination feed systems · · Must possess electrical trouble shooting skills
Added 6 mins ago
Programmer
Booz Allen Hamilton_United States
Camp Pendleton, CA
As a senior embedded software engineer at Booz Allen, you’ll support the development of systems, sites, and tools for our clients. Using the latest tools and technology, you’ll write, test,…
Added 6 mins ago
RF Systems and Test Electrical Engineer
Booz Allen Hamilton_United States
MD
As an electrical engineer, you understand the workings behind complex systems. That knowledge is key when it comes to designing and fielding radio systems. We’re looking for an electrical…
Added 7 mins ago
J
Lead Integration and Automation Engineer (Multiple Openings)
WA
- $119,700 to $125,700 USD / year
The Lead Integration and Automation Engineer will be required to maintain and deploy a detailed understanding of electric power system engineering integration, automation, and industrial…
Added 8 mins ago
Staff Software Engineer, Fraud & Payment Risk Platform
Flex
NY
Flex is looking for a Staff Software Engineer to build and scale our Fraud and Payment Risk Platform. You will lead the architecture and hands-on development of backend services and shared…
Added 10 mins ago
O
Senior Principal Data Center Low Voltage Engineer
Oracle
Phoenix, AZ
- $102,300 to $209,500 USD / year
Leads the deployment of physical plant cabling systems. Leads the coordination of infrastructure implementation efforts for Oracle data centers. Collaborates with Program Management teams…
Added 10 mins ago
O
Senior Platform Software Engineer
Oracle
Nashville, TN
- $87,800 to $209,500 USD / year
Software Engineer - OCI User Experience Engineering Platform
Added 10 mins ago
O
Platform Software Engineer 2
Oracle
Nashville, TN
- $81,000 to $166,100 USD / year
Performs periodic maintenance and testing operations for systems that require upgrading or patching (e.g., for critical vulnerabilities), with limited guidance.
Added 10 mins ago
O
Senior Platform Software Engineer
Oracle
Nashville, TN
- $87,800 to $209,500 USD / year
As a senior software engineer in Generative AI Service team, you will be leading the effort of building distributed, scalable, high-performance AI model training and serving systems in…
Added 10 mins ago
O
Principal Software Engineer, Core Infrastructure
Oracle
Nashville, TN
- $114,600 to $234,600 USD / year
An engineer on the Strategic Customer Engineering team plays a critical role in aligning technical details across various service teams, collaborating with cross-functional stakeholders,…
Added 14 mins ago
Manufacturing Engineer
Alfa Laval Inc (US)
Broken Arrow, OK
The Manufacturing Engineer is responsible for developing, improving, and maintaining efficient manufacturing processes and systems within the production environment. The scope of the role…
Added 15 mins ago
Supervisor Gas Control (Anchorage)
ENSTAR Natural Gas Company
Anchorage, AK
Works with the Systems Engineer on SCADA system projects, upgrades, maintenance, and other SCADA functions.
Added 16 mins ago
Specialist, Network Plan Engineer-Splunk Administrator/Analyst
L3Harris Technologies
San Antonio, TX
Must have a Top Secret clearance with eligibility to SCI
Added 16 mins ago
Senior Associate, Software Engineer (FPGA Firmware Eng.)
L3Harris Technologies
Palm Bay, FL
We are seeking a Senior Associate, Software Engineer (FPGA Firmware Eng.) who wants to stay hands-on at the intersection of embedded hardware and mission-focused capability. You will turn…
Added 16 mins ago
Specialist, Software Engineering (Application)
L3Harris Technologies
Plano, TX
As a Senior Specialist, Software Engineer (Application), you will be responsible for supporting and leading the development and execution of software interfacing with the targeted hardware.…
Added 17 mins ago
Commercial Building Engineer - Miami, FL
Parkway Services LLC
Miami, FL
The Building Engineer applies trade skills to perform preventive maintenance and corrective repair of building systems for the safe, efficient, and proper operation of the assigned…
Added 17 mins ago
RM
Field Engineer
Rex Moore Group, Inc.
Sacramento, CA
- $26.88 to $39.9 USD / hour
As a Field Engineer, you will coordinate manpower, manage on-site materials, logistics, tools, and rental equipment, and assist with field workers' certification management. Your…
Added 18 mins ago
Lead Generator Project Engineer-1
GE Gas Turbines (Greenville) L.L.C.
United States
The Lead Generator Project Engineer provides technical project management, technical direction, and drives coordination of engineering activities and critical issue resolution for…
Added 18 mins ago
Lead Generator Project Engineer-2
GE Gas Turbines (Greenville) L.L.C.
United States
The Lead Generator Project Engineer provides technical project management, technical direction, and drives coordination of engineering activities and critical issue resolution for…
Added 18 mins ago
Senior SRE Engineer - San Francisco
Plaud
San Francisco, CA
- Design and operate highly available, scalable cloud-native systems for AI workloads

Mozilla

Staff Software Engineer, Browser (New Products)

Remote, United States

Apply on job-boards.greenhouse.io About employer

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Job details

Posting language: English
Posted: Nov 10, 2026

Original job description

Why Mozilla?

Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people.

The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders - only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms.

About this team and role

Mozilla is seeking experienced browser engineers to join a small team exploring new applications of browser technology. The work combines deep systems engineering, rapid experimentation, and close collaboration across technical disciplines.

We are looking for a browser engine specialist who enjoys turning difficult systems questions into working experiments. You will investigate browser behavior, implement changes deep in the engine, and establish which ideas produce meaningful improvements. This is a hands-on individual contributor role with ownership of engine-level investigations and implementation, working closely with the team’s technical lead.

The work suits someone who has built or substantially changed browser internals, understands the tradeoffs embedded in those systems, and enjoys applying that knowledge to unfamiliar problems. Your experiments will help inform technical direction.

What you'll do:

Design and implement experiments within browser engine subsystems. Investigate how internal data structures and execution behavior affect performance, correctness, and the interfaces exposed to developer tools.
Evaluate ways to represent and expose browser state efficiently and accurately. Identify the tradeoffs in each approach, including information loss, implementation complexity, and compatibility with dynamic web content.
Prototype engine capabilities that support reliable programmatic interaction with web content. Investigate how document structure, layout, navigation, and event handling affect correctness and performance.
Instrument browser behavior and evaluate changes against repeatable tasks. Measure performance and correctness, isolate the effect of each change, and document unsuccessful experiments as clearly as successful ones. Check that gains hold beyond the workloads used to develop the prototype.
Profile the overhead introduced by new capabilities and pursue improvements where measurements justify them. Use AI tools to accelerate coding and analysis, and verify their output through debugging, tests, and measurement.

What you'll bring:

Deep hands-on expertise in at least one browser engine subsystem, such as DOM and Web APIs, layout and rendering, accessibility, JavaScript runtimes, or networking and process architecture. You have implemented substantial changes and can trace their effects into neighboring subsystems.
Strong proficiency in C++ or Rust, experience navigating a large systems codebase, and practical knowledge of memory ownership, concurrency, object lifetimes, and performance debugging. You can build the JavaScript and scripting tools needed to exercise and measure your work.
A demonstrated ability to investigate unfamiliar code, form a precise hypothesis, construct a useful prototype, and interpret the results. You can separate the effects of your implementation from variability in websites, workloads, or model behavior.
A strong understanding of web platform behavior and compatibility. You can reason about how document structure, script execution, rendering, and user interaction relate, including cases where the browser’s internal state is difficult to expose accurately to another system.
Experience with profiling, tracing, regression tests, or conformance tests, and a habit of grounding performance claims in reproducible evidence. You can explain both the benefit of an optimization and the circumstances in which it fails.
Curiosity about AI agents and a willingness to work directly with agent harnesses and coding tools. You can connect a low-level implementation choice to the information an agent receives and the work it must do next.

Nice to have:

Contributions to Gecko, Servo, Blink, WebKit, or another browser engine
Experience maintaining an open-source project
Technical leadership in a small team building a new product
Experience with accessibility infrastructure, browser security, profiling, or automated evaluation of agent workflows

What you’ll get:

Generous performance-based bonus plans to all eligible employees - we share in our success as one team
Rich medical, dental, and vision coverage
Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute)
Quarterly all-company wellness days where everyone takes a pause together
Country specific holidays plus a day off for your birthday
One-time home office stipend
Annual professional development budget
Quarterly well-being stipend
Considerable paid parental leave
Employee referral bonus program
Other benefits (life/AD&D, disability, EAP, etc. - varies by country)

About Mozilla

Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online.

Commitment to diversity, equity, inclusion, and belonging

Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientations, gender identities, and expressions.

We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation.

We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose.

Group: C

Req ID: R3221

Hiring Ranges:

US Tier 1 Locations

$163,000 - $217,000 USD

US Tier 2 Locations

$150,000 - $200,000 USD

US Tier 3 Locations

$138,000 - $185,000 USD

Apply on job-boards.greenhouse.io About employer

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Jobs in the United States