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Microsoft UK • London, United Kingdom

Senior Security Engineer

Employment type:  Full time

3 days/week at home

Fully flexible hours

Apply now

Job Description


The Microsoft Offensive Research & Security Engineering (MORSE) team is looking for a learn-it-all engineer that will help secure Microsoft products and devices.

The MORSE team is responsible for securing the Windows client and server operating systems, used by billions of customers every day in businesses and across Azure. This team performs security design reviews, code reviews, and penetration testing on key features of Windows and Azure to make sure they meet the highest possible security standards.

In this role, you will help engineering teams secure the operating systems built at Microsoft. The ideal candidate will have hands-on experience with native code (C/C++), penetration testing (code audit, writing fuzzers, finding creative ways to break assumptions), a clear understanding of OS security fundamentals, solid computer science skills, and a passion for keeping Microsoft customers safe.


  • Participate in security reviews to identify and mitigate risk in Microsoft products, including design reviews, code reviews, and fuzzing
  • Be the security contact for teams building new innovative products and technologies in the next version of Windows, Azure, and devices
  • Identify security vulnerabilities in a wide variety of key OS features such as network protocols, security features, and Microsoft devices
  • Leverage a broad and current understanding of security to devise new protections
  • Interact with the external security community and security researchers
  • Collaborate with product teams to improve security, and articulate the business value of security investments


  • Ample experience in a senior capacity, in a software engineering or security-related field.
  • Expertise in identifying vulnerabilities in operating systems and/or native (C/C++) applications.

The following additional experiences are favorable, but not requirements:

  • Public track record of relevant security research, especially around vulnerability discovery
  • Experience exploiting bugs and bypassing security mitigations in operating systems
  • Familiarity with Microsoft Windows architecture

Microsoft is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to age, ancestry, color, family or medical care leave, gender identity or expression, genetic information, marital status, medical condition, national origin, physical or mental disability, political affiliation, protected veteran status, race, religion, sex (including pregnancy), sexual orientation, or any other characteristic protected by applicable laws, regulations and ordinances. If you need assistance and/or a reasonable accommodation due to a disability during the application or the recruiting process, please send a request via the Accommodation request form.

Benefits/perks listed below may vary depending on the nature of your employment with Microsoft and the country where you work.

Company benefits

Wellbeing allowance
Health insurance
Dental coverage
Gym membership
Mental health platform access
Buy or sell annual leave
Shared parental leave
Matched pension contribution
Charity donation scheme
Employee assistance programme
Employee discounts
Volunteer days
Fertility treatment leave
Open to compressed hours
Open to job sharing
Fertility benefits
Enhanced sick pay
Enhanced sick days
Compassionate leave
Travel insurance
20 days annual leave + bank holidays
Enhanced maternity leave
Enhanced paternity leave
Adoption leave
Childcare credits
Carer’s leave
Cycle to work scheme
Faith rooms
Annual bonus
Annual pay rises
Company car
Open to part-time employees
Pregnancy loss leave
Life insurance
Equity packages
Financial coaching
Relocation packages
Employees are very happy with their working location freedom
Employees are very happy with the flexibility in the hours they work
Employees are largely happy with the benefits their company offers
Work-life balance
Employees feel that they can switch off quite easily from work
Role modelling
Employees feel that most people work flexibly
Employees feel that they can mostly manage how they get their own work done

Working at Microsoft UK

Company employees

Globally: 220,000

Gender diversity (male:female)


Office locations

London, Reading, Cambridge, Romsey, Manchester, Edinburgh

Hiring Countries

United Kingdom

Awards & Achievements

Most flexible companies

Most flexible companies

Flexa100 2024

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