Network Security Engineer

G-Research; Greater London; On-site; GBP 100,000 - GBP 125,000; Full time

Job summary

An advanced quantitative finance firm based in London is seeking an experienced Network Security Engineer. This role involves designing and maintaining robust network infrastructure to support cutting-edge research. Candidates will handle security systems, conduct audits, and collaborate with teams to align security initiatives. Ideal applicants have expertise in security frameworks, enterprise firewalls, and automated solutions. This position offers competitive compensation and great benefits, including a work-life balance and professional growth opportunities.

Benefits

Highly competitive compensation plus annual discretionary bonus

Lunch provided and dedicated barista bar

30 days’ annual leave

9% company pension contributions

Informal dress code

Comprehensive healthcare and life assurance

Cycle-to-work scheme

Monthly company events

Qualifications

• Deep technical expertise in network security engineering.
• Problem-solving instinct and strategic thinking.
• Ability to automate intelligently and deliver reliably at scale.

Responsibilities

• Designing and implementing security systems.
• Delivering high-quality designs for strategic initiatives.
• Conducting regular network security audits for compliance.
• Implementing change requests and managing escalations.

Skills

Security frameworks such as NIST, CIS or similar

Configuring and operating enterprise firewalls, e.g., Fortinet, Palo Alto

Web proxy technologies and traffic inspection

F5 (LTM / ASM / APM or similar)

Deep packet inspection and core security engineering principles

Networking fundamentals (TCP/IP, routing, switching, DNS)

Automation and scripting

Privileged Access Management solutions

Job description

We tackle the most complex problems in quantitative finance, by bringing scientific clarity to financial complexity.

From our London HQ, we unite world-class researchers and engineers in an environment that values deep exploration and methodical execution - because the best ideas take time to evolve. Together we’re building a world-class platform to amplify our teams’ most powerful ideas.

As part of our engineering team, you’ll shape the platforms and tools that drive high-impact research - designing systems that scale, accelerate discovery and support innovation across the firm.

Take the next step in your career.

The role

We’re looking for an experienced Network Security Engineer who’s passionate about building and maintaining high-performance, scalable and resilient network infrastructure.

You’ll be part of a team that designs, automates and supports a global environment, which underpins cutting-edge research and technology operations, and drives the success of G-Research.

Key responsibilities of the role include:

• Designing and implementing security systems
• Delivering high-quality designs and ensuring successful roll-out of strategic initiatives
• Working closely with Security Architecture to drive security roadmaps
• Working closely with wider core infrastructure teams to ensure alignment on infrastructure goals and configurations
• Conducting regular network security audits and ensuring compliance with internal standards and best practices
• Being the point of contact for escalations from the operations team
• Implementing change requests

If you’re motivated by solving complex problems, working in a collaborative, high-performance environment, we’d love to hear from you.

Who are we looking for?

You’ll thrive in this role if you bring a mix of deep technical expertise, problem-solving instinct and a passion for modern network security engineering.

We’re looking for someone who can think strategically, automate intelligently and deliver reliably at scale.

The ideal candidate will have the following skills and experience:

• Security frameworks such as NIST, CIS or similar
• Configuring and operating enterprise firewalls, for example with Fortinet and Palo Alto
• Web proxy technologies and traffic inspection
• F5 (LTM / ASM / APM or similar)
• Deep packet inspection, core security engineering principles and modern attacker techniques
• Networking fundamentals, for example TCP/IP, routing, switching and DNS
• Automation and scripting
• Privileged Access Management solutions

Why should you apply?

• Highly competitive compensation plus annual discretionary bonus
• Lunch provided (via Just Eat for Business) and dedicated barista bar
• 30 days’ annual leave
• 9% company pension contributions
• Informal dress code and excellent work/life balance
• Comprehensive healthcare and life assurance
• Cycle-to-work scheme
• Monthly company events

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