principal security engineer Work, Jobs in england (with Salaries)

Principal Security Engineer - Fuzzing Specialist
Arm —Cambridge
- £126,200 - £170,800 a year
- Hybrid work
- AWS
- C++
- APIs
Principal Security Engineer, SDO AppSec EMEA
Amazon Development Centre (London) Limited —London
- Full-time
- Computer Science
- Engineering
- Master's degree
Principal Security Engineer
Hastings Direct —Bexhill
- Full-time
- Hybrid work
- Azure
- Mentoring
- Agile
Global IT Director - Principal Security Engineer
Boston Consulting Group —London
- Full-time
- Azure
- Java
- AWS
Principal Cyber Security Engineer
Yorkshire Building Society —Bradford
- £55,000 - £65,000 a year
- Leadership
- Communication skills
12d
Principal AI Engineer
1st Central —Haywards Heath
- £75,378 - £100,000 a year
- Hybrid work
- Azure
- System design
- Computer networking
Principal Product Security Engineer
SoundCloud —London
- Data analysis skills
- SQL
- AWS
- Work from home
- Gym membership
Principal Software Engineer - UK Security Clearance eligibility required.
Appvia —London
- £80,000 - £90,000 a year
- Full-time
- Hybrid work
- Azure
- Java
- SQL
- Employee assistance programme
- Flexible schedule
Quick apply
Principal Network Security Engineer
Entrust —Newbury
- Full-time
- Hybrid work
- Management
- Computer Science
- No experience needed
Principal Security Engineer
RedCloud —London
- Hybrid work
- Project management
- Software development
- IT
- Annual leave
- Employee discount
Principal Systems Engineer
Medtronic —London
- £64,400 - £96,600 a year
- Full-time
- Engineering
- Bachelor's degree
- Travel
Principal Process Engineer
DBD International —Warrington
- Hybrid work
- Engineering
- Communication skills
Principal/Lead Systems Engineer (Security)
Leonardo UK Ltd —Southampton
- Full-time
- Hybrid work
- Military
- Engineering
- Flexible schedule
- Referral programme
Principal Security Engineer
Pipedrive —London
- Full-time
- Hybrid work
- English
- Master's degree
- APIs
- Relocation assistance
- Flexible schedule
Quick apply
Azure Principal Platform Engineer - UK Security Clearance eligibility required
Appvia —London
- £90,000 - £120,000 a year
- Full-time
- Hybrid work
- Azure
- DevOps
- Project management
- Employee assistance programme
- Flexible schedule
Quick apply
Principal Engineer
Kier Group —Liverpool
- From £70,000 a year
- Full-time
- Engineering
- Business
- Leadership
Principal Security Engineer
Smart Pension —London
- Hybrid work
- Azure
- DevOps
- AWS
- Employee assistance programme
- Employee discount
Principal Mechanical Engineer
BAE Systems Inc. —Westminster
- £118,095 - £200,762 a year
- Full-time
- Remote
- Doctoral degree
- CAD
- Engineering
- Annual leave
- Employee assistance programme
6d
Principal Quality Engineer
Leonardo UK Ltd —Luton
- £55,000 - £65,000 a year
- Full-time
- Hybrid work
- Analysis skills
- Continuous improvement
- Flexible schedule
- Referral programme
Principal Engineer
OSB Group —Wolverhampton
- £90,000 - £110,000 a year
- Full-time
- Azure
- DevOps
- AWS
- Annual leave

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principal security engineer jobs near england

Principal Security Engineer - Fuzzing Specialist

Arm -
Cambridge

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Job details

£126,200 - £170,800 a year

Qualifications

Kubernetes
Firmware
Google Cloud Platform
OS Kernels
AWS
C++
C
APIs
Root cause analysis
Communication skills
Python

Full job description

Job ID 2025-15045

Date posted Jun. 03, 2026

Location Cambridge, United Kingdom

Category Software Engineering

Job Overview:

As a Security Engineer – Fuzzing Specialist, you will own and evolve our coverage-guided fuzzing program. Your mission is to uncover hard-to-reach security flaws before attackers do, drive fixes to closure, and help product teams to embrace dynamic testing like fuzzing. You’ll scout for new attack surfaces, craft high-performance fuzzing harnesses, and design custom sanitisers that push the state of the art. Success means measurable coverage gains, actionable crash reports, and products that ship with provable resilience.

Responsibilities:

Map & prioritise fuzzing surfaces across services, libraries, APIs, and protocols; maintain a living risk-based roadmap.
Design, build, and extend fuzzing harnesses (libFuzzer, AFL++, Honggfuzz, etc.) that improve code-path exploration and minimise false positives.
Continuously improve coverage by growing seed corpus, deploying targeted mutation strategies, and integrating new instrumentation techniques.
Automate crash triage & root-cause analysis; distinguish exploitable vulnerabilities from benign faults and drive CVE-level findings to remediation.
Develop custom sanitisers to expose classes of bugs traditional fuzzing misses.
Validate fixes & guard against regressions through differential fuzzing and regression corpora.
Assess external disclosures (bug bounties, supply-chain advisories) to determine fuzzing detectability and refine harnesses when gaps are found.
Document, report, and share insights — from coverage metrics to post-mortems to create data-driven security.

Required Skills and Experience:

1+ years in application or product security with a deep focus on coverage-guided fuzzing.
Hands-on expertise with at least one modern fuzzing framework (e.g., libFuzzer, AFL++, Honggfuzz).
Proficient in C/C++ plus strong scripting ability in Python for automation.
Solid understanding of memory-safety vulnerabilities, undefined behaviour, sanitisers, and compiler instrumentation.
Demonstrated ability to triage crashes using debuggers, profilers, and reverse-engineering tools (gdb/lldb, IDA/Ghidra).
Excellent written communication for documenting findings and influencing engineering teams.

“Nice To Have” Skills and Experience :

Contributions to open-source fuzzing tools, sanitisers, or security research publications.
Knowledge of distributed fuzzing at scale (GCP/AWS, Kubernetes, or bare-metal clusters).
Familiarity with kernel, embedded, or firmware fuzzing (e.g., Syzkaller, QEMU-based harnesses).
Background in reverse engineering, static analysis or symbolic execution.
Experience integrating fuzzing into CI/CD pipelines and tracking coverage metrics.

If you’re passionate about breaking software safely, love high-coverage charts, and want to make a measurable dent in product security, we’d love to hear from you!

In Return:

You will develop the roadmap for Arm’s core interconnect and control subsystems, ensuring they are strategically aligned and technically validated across markets. While the initial focus is infrastructure, you will work across line of business and customers to ensure these foundational technologies are robust, driven, and reusable across Arm’s diverse product portfolio. Your ownership of requirement specs and roadmap rigor will ensure subsystem coherence across product generations — enabling Arm to scale from IP to complete system solutions.

#LI-CI1

Accommodations at Arm

At Arm, we want to build extraordinary teams. If you need an adjustment or an accommodation during the recruitment process, please email [email protected]. To note, by sending us the requested information, you consent to its use by Arm to arrange for appropriate accommodations. All accommodation or adjustment requests will be treated with confidentiality, and information concerning these requests will only be disclosed as necessary to provide the accommodation. Although this is not an exhaustive list, examples of support include breaks between interviews, having documents read aloud, or office accessibility. Please email us about anything we can do to accommodate you during the recruitment process.

Hybrid Working at Arm

Arm’s approach to hybrid working is designed to create a working environment that supports both high performance and personal wellbeing. We believe in bringing people together face to face to enable us to work at pace, whilst recognizing the value of flexibility. Within that framework, we empower groups/teams to determine their own hybrid working patterns, depending on the work and the team’s needs. Details of what this means for each role will be shared upon application. In some cases, the flexibility we can offer is limited by local legal, regulatory, tax, or other considerations, and where this is the case, we will collaborate with you to find the best solution. Please talk to us to find out more about what this could look like for you.

Equal Opportunities at Arm

Arm is an equal opportunity employer, committed to providing an environment of mutual respect where equal opportunities are available to all applicants and colleagues. We are a diverse organization of dedicated and innovative individuals, and don’t discriminate on the basis of race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran.

Salary Range:

£126,200

£170,800

per year

Apply Now

Refine Your Search

principal security engineer jobs in england

Principal Security Engineer - Fuzzing Specialist

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