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1,592

It Security Analyst jobs in United Kingdom

Senior Software Engineer - Firefox Enterprise Remote UK

Moz

United Kingdom
Remote
GBP 55,000 - 80,000
30+ days ago
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Network Engineer

Roc Technologies Ltd.

United Kingdom
On-site
GBP 40,000 - 55,000
30+ days ago

Cyber Software Engineer

Roke Manor Research Limited

United Kingdom
On-site
GBP 45,000 - 65,000
30+ days ago

Senior Network Engineer

Dubizzle Limited

Aberdeen City
On-site
GBP 45,000 - 65,000
30+ days ago

Information Security Manager (FTC)

Compare The Market Limited

London
Hybrid
GBP 60,000 - 80,000
30+ days ago
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Senior Software Engineer - National Security

CACI Limited

Manchester
On-site
GBP 55,000 - 75,000
30+ days ago

Cyber Software Engineer

Roke Manor Research Limited

Manchester
On-site
GBP 45,000 - 65,000
30+ days ago

Software Engineer →

AnaVation LLC

London
Hybrid
GBP 60,000 - 80,000
30+ days ago
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2682 - Senior Network Engineer UK Aberdeen

Prosource

Aberdeen City
Hybrid
GBP 80,000 - 100,000
30+ days ago

Cyber Operations Specialists

INZPIRE LTD

Malvern
On-site
GBP 45,000 - 65,000
30+ days ago

Senior Software Engineer

Dubizzle Limited

United Kingdom
Remote
GBP 60,000 - 80,000
30+ days ago

Software Engineer- Design Systems

Dataannotation

United Kingdom
Remote
GBP 80,000 - 100,000
30+ days ago

Data Analytics Developer

Peermusic Neighbouring Rights

London
Hybrid
GBP 40,000 - 60,000
30+ days ago

Senior Software Engineer 1 (Fast Track)

AnaVation LLC

Oxford
Hybrid
GBP 45,000 - 65,000
30+ days ago

Senior AI Software Engineer

microTECH Global Limited

Cambridge
On-site
GBP 60,000 - 90,000
30+ days ago

Senior Software Engineer

Econify LLC

Birmingham
Hybrid
GBP 125,000 - 150,000
30+ days ago

Software Engineer

National Quantum Computing Centre

South Oxfordshire
On-site
GBP 57,000
30+ days ago

Software Engineer - Undergraduate Placement 2026

Mbda Systems

Bristol
Hybrid
GBP 23,000 - 28,000
30+ days ago

Senior Software Engineer in Test London, England, United Kingdom London, England, United Kingdom

Axon Enterprise

London
Hybrid
GBP 70,000 - 90,000
30+ days ago

Software Engineer

Dubizzle Limited

London
Hybrid
GBP 60,000 - 90,000
30+ days ago

Solutions Architect

Amber Labs Limited

North East
Hybrid
GBP 60,000 - 80,000
30+ days ago

Solution Architect - HR & Payroll

Stansted Airport Ltd

Manchester
Hybrid
GBP 60,000 - 80,000
30+ days ago

Software Engineer

Sirius Digital

Portsmouth
On-site
GBP 40,000 - 60,000
30+ days ago

Security Architect

LGBT Great

London
Hybrid
GBP 70,000 - 90,000
30+ days ago

Senior Software Engineer

AnaVation LLC

London
Hybrid
GBP 85,000 - 100,000
30+ days ago

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Senior Software Engineer - Firefox Enterprise Remote UK
Moz
Remote
GBP 55,000 - 80,000
Full time
30+ days ago

Job summary

A leading open-source software organization is seeking a Senior Software Engineer to contribute to the Firefox desktop platform. The role involves developing new features, enhancing security, and collaborating with a geographically-distributed team. Candidates should have a solid grasp of C/C++ and experience in systems programming. A variety of benefits are offered, including a performance-based bonus, medical coverage, and generous retirement contributions.

Benefits

Generous performance-based bonus plans
Rich medical, dental, and vision coverage
Generous retirement contributions
Quarterly all-company wellness days
Country specific holidays plus a day off for your birthday
One-time home office stipend
Quarterly well-being stipend
Considerable paid parental leave
Employee referral bonus program

Qualifications

  • Experience with systems programming on Windows, macOS, or Linux.
  • Solid understanding of C/C++ and some Rust knowledge.
  • Excellent communication skills, especially in a distributed team setting.

Responsibilities

  • Develop and ship new features for Firefox.
  • Improve security and administration tools for large deployments.
  • Optimize Firefox quality by fixing software defects.

Skills

Systems programming
C/C++
Rust
Strong communication
Job description
Senior Software Engineer - Firefox Enterprise

Remote UK

Overview

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

Our team is geographically-distributed, and working in the open is the norm. We contribute to the code driving Firefox on a number of desktop platforms - Windows, Linux, and macOS.

A Senior Software Engineer contributes to architectural discussions, and driving feature development within a team. At Mozilla, Senior Engineers are expected to work independently on scoped projects, collaborate closely with peers, and play a key role in delivering high-quality software that aligns with team goals.

What You'll Get To Do
  • Develop, innovate, and ship the next experience of Firefox through improved integration with the operating system.
  • Improve the ease of use and security of Firefox in large deployments by developing better administration and monitoring tools.
  • Assess what work supports the team and product roadmap and make insightful recommendations in regards to priorities.
  • Work with expert software engineers to further develop your understanding of the Windows, macOS and Linux platforms.
  • Optimize the quality of Firefox by hunting down and fixing software defects, improving the experience of hundreds of millions of users.
  • Work with a geographically-distributed development team.
What You Bring
  • Experience with systems programming on a major desktop platform (Windows, macOS or Linux).
  • A solid understanding of C/C++ and some knowledge of Rust.
  • You are an excellent communicator and have participated effectively on a distributed team.
  • You’re pragmatic about how to move things forward in specific timeframes including trade-offs and safeguards when implementing new functionality.
  • Experience working collaboratively with product managers, project managers, and/or other non-engineering teams.
Bonus Points
  • Professional programming experience in Rust.
  • You have developed cross-platform desktop applications, particularly when this involves low level systems programming such as Cocoa APIs on macOS or GTK on Linux.
  • You have previously successfully contributed to an open source project.

We value a variety of voices within our team and at Mozilla. You don't need to check every box on this list to apply.

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
  • 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.

Hiring Ranges

Remote UK

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* The salary benchmark is based on the target salaries of market leaders in their relevant sectors. It is intended to serve as a guide to help Premium Members assess open positions and to help in salary negotiations. The salary benchmark is not provided directly by the company, which could be significantly higher or lower.

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