Company: Segment (Twilio)

Apply for the Senior Infrastructure Engineer

Location: Kingswood

Job Description:

Due to the interesting work we do and the sector this team is working in, we require all candidates to currently hold eDV clearance.

About Us

At Raytheon UK, we take immense pride in being a leader in defence and aerospace technology. As an employer, we are dedicated to fuelling innovation, nurturing talent, and fostering a culture of excellence. We help solve customers’ toughest challenges across land, sea, air, space and cyberspace and provide digital and training transformation solutions to commercial and military customers.

Our National Security Cyber business delivers mission‑critical solutions that safeguard our national security 24 hours a day, seven days a week. Working in a mature, agile environment, our SCRUM teams work synchronously with our customers to solve some of the toughest digital challenges faced in the world today.

Role & Responsibilities

Perform system administration and backup tasks
Assist in the investigation and resolution of issues relating to applications, networks and services
Contribute to maintenance, installation and problem resolution
Research and resolve system design issues
Provide interpretation of requirements and design into component design and implementation

Required Experience

Experience working within an Agile / SCRUM / DevOps delivery model
Experience as a Systems Engineer in software intensive programmes covering full engineering lifecycle from requirements decomposition to acceptance and customer sign off
Understanding of the complexities in design and implementation of large‑scale information systems
Ability to take responsibility for technical aspects of a project and to work closely with project management to deliver
Linux administration and deployment
Understanding of server, storage and desktop hardware

Desirable Experience

Experience working in a Linux environment (RedHat, CentOS)
Knowledge of Windows Server, Active Directory, OU, User and Group Management
Demonstrable experience of model‑based systems architecture/engineering (e.g. MODAF, TOGAF)
Knowledge of RedHat migrations
Knowledge of networking health monitoring
Knowledge of Concourse (writing pipelines, administering the cluster)
Understanding of VMware vSphere ESXi
Knowledge of Atlassian Suite
Infrastructure as Code (e.g. Terraform, Ansible)
Docker / Kubernetes containerisation and orchestration
Elasticsearch/Kibana
Cloud services (AWS or Azure)
Helm charts
MongoDB
Experience building enterprise level web applications or services
Apache Kafka

Benefits

Competitive salary
Contributory pension scheme (up to 10.5% company contribution)
Life assurance payable 6 times salary with pension
25 days holiday (increasing with service) plus statutory public holidays; opportunity to buy and sell up to 5 days (37 hours)
Company bonus scheme (discretionary)
Flexible benefits scheme with extensive salary sacrifice options (Health Cashplan, Dental, Cycle to Work, etc.)
Enhanced sick pay
Enhanced family‑friendly policies including maternity, paternity & shared parental leave
Work culture: 37‑hour working week with flexible days; early finish on Fridays at 1.30pm, start your weekend early
Remote, hybrid and site‑based working opportunities; up to 5 paid days volunteering each year
Flexible working culture focused on output; formal arrangements available on request (assessed by role)

Equal Employment Opportunity

RTX adheres to the principles of equal employment. All qualified applications will be given careful consideration without regard to ethnicity, color, religion, gender, sexual orientation or identity, national origin, age, disability, protected veteran status or any other characteristic protected by law.

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Posted: July 14th, 2026