SERVICE MESH - Security Design Engineer

Project overview

We are looking for an experienced Network Security Architect/Security Engineer with strong Service Mesh experience to support a major security transformation within a complex enterprise environment.

This is a Network Security role, not a DevOps, SRE or Platform Engineering position.

The core focus is the security architecture surrounding Service Mesh and modern microservices environments. We need someone who brings a genuine background in network security, understands technologies such as firewalls, proxies, IDS/IPS, segmentation and Layer Seven security, and has subsequently applied those principles within Kubernetes and Service Mesh environments.

You will also need a good understanding of software and the Software Development Lifecycle, ideally gained through working closely with software-development teams or within software-led organisations.

Service Mesh - Core Requirement

Service Mesh experience is central to this role and should be clearly demonstrated in your professional experience.

We are particularly interested in experience with:

You should be comfortable explaining how traditional network-security principles translate into a modern environment where large numbers of microservices communicate dynamically across Kubernetes infrastructure.

Network Security - Core Requirement

The successful person will come from a Network Security background and should have practical experience across a broad range of network-security technologies and controls.

This should include several of the following:

We need somebody who understands the fundamentals of how network traffic is controlled, inspected, segmented and protected, and who can apply that knowledge to Service Mesh and cloud-native environments.

Software and SDLC

This role sits close to software engineering teams, so you need to understand how software is designed, developed, tested, released and operated.

We are particularly interested in experience involving:

A previous software-development or software-engineering background would be particularly valuable.

You do not need to be a current software developer, but you must be technically comfortable discussing application architecture and security with development teams.

Contract Details

• Istio
• Envoy
• Linkerd
• Kubernetes/OpenShift
• Service-to-service communication
• mTLS and inter-service encryption
• Service-to-service authentication and authorisation
• Service Mesh security policies
• Ingress and egress security
• Traffic routing and traffic policies
• Workload identity and trust between services
• Observability within Service Mesh environments
• Microservices security
• Enterprise firewalls/Next-Generation Firewalls
• Palo Alto, Check Point, Fortinet, Cisco Firepower/ASA or Juniper SRX
• IDS/IPS
• Network segmentation and micro-segmentation
• Reverse proxies
• Forward proxies
• Network Access Control Lists and security policies
• Layer Seven firewalling
• WAF
• DDoS protection
• VPN/IPsec
• Secure ingress and egress
• Zero Trust networking
• SASE/ZTNA
• Load balancing and application delivery
• F5/equivalent technologies
• Cloud network security across AWS, Azure and/or GCP
• Software Development Lifecycle/SDLC
• Working directly with software-development teams
• Application architecture
• Microservices
• APIs and API security
• Secure-by-design principles
• Threat modelling
• Software release and deployment processes
• CI/CD awareness
• Application security
• Security requirements throughout the development lifecycle
• This is an initial 6 month engagement with a Tier 1 bank. You will be able to work in a hybrid model from London, Sheffield, Birmingham, or Manchester (3 days a week)
• This will operate INSIDE IR35
• We are not able to move this to an Outside IR35 engagement

Project details

London, UK

Trading as TEKsystems. Allegis Group Limited, Bracknell, RG12 1RT, United Kingdom. No. 2876353. Allegis Group Limited operates as an Employment Business and Employment Agency as set out in the Conduct of Employment Agencies and Employment Businesses Regulations 2003. TEKsystems is a company within the Allegis Group network of companies (collectively referred to as "Allegis Group"). Aerotek, Aston Carter, EASi, Talentis Solutions, TEKsystems, Stamford Consultants and The Stamford Group are Allegis Group brands.

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• Start: 2026-10-29
• Location: London, GB-ENG, UK, GB

Security Design Engineer (Service Mesh)

IMPORTANT - Please ensure your CV highlights your experience with Service Mesh technologies, Network Security, and any Software experience. These are essential skills for this role

• 6 Month Contract
• INSIDE IR35
• London, Sheffield, Manchester, Birmingham
• No Sponsorship Available