Systems Engineer III (Automation)

Tesco; Welwyn Garden City; Hybrid; GBP 60,000 - 80,000; Full time

Job summary

A leading retail company based in Welwyn Garden City is looking for a Senior Systems Engineer to enhance network infrastructure automation. Responsibilities include designing network solutions, contributing to the Technology Roadmap, and keeping technical skills updated. Ideal candidates will have over 10 years of experience in complex organizations and proven skills in F5 platforms and firewall technologies. The position is hybrid with competitive benefits including an annual bonus and generous holiday allowance.

Benefits

Annual bonus scheme up to 20%

25 days holiday plus personal day

Private medical insurance

Paid maternity and paternity leave

Free virtual GP service

Qualifications

• 10+ years of experience in designing and deploying solutions for large organizations.
• Analytical and structured approach to design, process and troubleshooting.
• Self-starter willing to take ownership and accountability.

Responsibilities

• Design and deliver network solutions using existing network infrastructure.
• Contribute to the Technology Roadmap for Tesco Network Services.
• Resolve incidents and problems in the technical area.

Skills

Strong knowledge of F5 platforms

Firewall technologies (Palo Alto)

Proficient in Python

Experience with BlueCat or Infoblox

Knowledge of Layer 2/3 networking

Skilled in API configuration

Troubleshooting with Splunk

Packet capture with Wireshark

Education

Engineering / Science Graduate/Diploma

Tools

GitHub

Terraform

Job description

Tesco UK • Welwyn Garden City • Hybrid • Full-Time • Apply by 31-Dec-2025

Job Summary

Senior Systems Engineers work with knowledge of Network Infrastructure automation, and are responsible for the entire development and support process for that specialism. You're responsible for delivering quality solutions for colleagues and customers alike, with the impact ranging from saving time, effort or money to re-defining normal.
You have knowledge of latest technology trends, expertise & practical knowledge of the types of systems, infrastructure & applications used within Tesco.

What is in it for you

• Annual bonus scheme of up to 20% of base salary
• Holiday starting at 25 days plus a personal day (plus Bank holidays)
• Private medical insurance
• 26 weeks maternity and adoption leave (after 1 years' service) at full pay, followed by 13 weeks of Statutory Maternity Pay or Statutory Adoption Pay, we also offer 6 weeks fully paid paternity leave
• Free 24/7 virtual GP service, Employee Assistance Programme (EAP) for you and your family, free access to a range of experts to support your mental wellbeing

You will be responsible for

• Design and deliver network solutions using existing network infrastructure. Where new Network technologies are being introduced, implement them and establish best practice for their adoption. Resolve incidents and problems associated with the technical area of responsibility.
• Contribute to the Technology Roadmap for Tesco Network Services.
• Evaluate new tools and techniques being able to understand their value and impact.
• Lead group design discussions on my area of expertise and be able to present with authority to a variety of audiences.
• Collaborate with other technical teams to understand their requirements and assist them consuming Infrastructure in the most seamless way possible.
• Keep my technical skills up to date and keep track of new technologies, understanding how they might benefit the Technology team and wider Tesco.
• Introduce automation to all aspects of my day to day work.

You will need

• Experience designing and deploying solutions for large, complex global organizations
• Analytical and structured approach to design, process and advanced troubleshooting
• Work with Architecture to produce and maintain high quality HLD/LLD and maintain standard documentation for area of responsibility.
• Well organized self-starter who takes personal ownership and accountability at required levels of the work stream and project life cycles; willing to go the extra mile at every opportunity
• Builds and maintains positive relationships within and across teams
• Communicates effectively, able to deliver and present both written and verbal, designs, strategies and concepts clearly.

Required Technology Skills

• Strong knowledge and hands-on experience with:
• F5 platforms: LTM, GTM, BigIQ, including Viprion, Velos, iSeries, and rSeries hardware
• Firewall technologies: Especially Palo Alto
• Scripting: Proficient in Python, Unix/Linux shell, or alternatives PowerShell
• IPAM and DNS: BlueCat or Infoblox platforms
• Layer 2/3 networking: Including dynamic routing protocols

• Solid understanding of:
• API configuration: Skilled in application setup, with proficiency in JSON/YAML and both declarative and imperative APIs
• Splunk: For troubleshooting and analysis
• Packet capture and debugging: Tools such as Wireshark

Desirable Technical Skills

• Kubernetes networking, knowledge of container technologies.
• Large-scale DDoS mitigation and Web Application Firewall (WAF) solutions
• Automation and configuration management: Experience with GitHub, GitActions, and Terraform
• Certificate management: Including CSR generation and lifecycle management
• Web protocols: In-depth knowledge of HTTP/HTTPS, redirects, response codes, headers, and F5 iRules/policies for custom traffic management
• Network management: Familiarity with tools such as Panorama and Arista CVP, protocols like SNMP, and hands-on experience with network management and alerting solutions
• Security best practices: Understanding of NIST, CIS, and ISO27000 frameworks

Educational Qualifications: Engineering / Science Graduate/Diploma

Years of Experience: 10+

About us

Our vision at Tesco is to become every customer's favourite way to shop, whether they are at home or out on the move. Our core purpose is 'Serving our customers, communities and planet a little better every day'. Serving means more than a transactional relationship with our customers. It means acting as a responsible and sustainable business for all stakeholders, for the communities we are part of and for the planet.

We are proud to have an inclusive culture at Tesco where everyone truly feels able to be themselves. At Tesco, we not only celebrate diversity, but recognise the value and opportunity it brings. We're committed to creating a workplace where differences are valued, and make sure that all colleagues are given the same opportunities. We're proud to have been accredited Disability Confident Leader and we're committed to providing a fully inclusive and accessible recruitment process.