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Network Engineer

  • London
  • Tech Operations
  • Contractor
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We are looking for an experienced network engineer wanting to join an innovative start-up in the distributed ledger space. The role offers the opportunity to make a significant contribution in an industry-leading, high-growth Fintech business developing one of the leading distributed ledger technology platforms. Distributed Ledger technology brings brand new challenges to the role of the network engineer, with networking and cloud service integration coming to the forefront of business and technical strategy.
Our flagship platform, Corda Network, is a distributed ledger platform which will ultimately link millions of Corda customer nodes communicating publicly over the internet and privately via dedicated communications. These customer nodes will be accessing a range of network services offered by R3 and for which high performance and continuous availability is essential. The Corda Network architecture integrates in-house, cloud-based and on-premise customer facilities.
You will play the lead role in building and operating the network architecture for Corda Network, overseeing its growth into the world’s leading DLT platform. You will have deep enterprise infrastructure knowledge and network integration skills together with strong communication and the ability to convince others of your ideas. You will be able to collaborate effectively with development, infrastructure architecture, operations and production support teams. You will have excellent analytical and problem-solving skills and will enjoy working in an atmosphere of high enthusiasm, passion and independent thinking.
Your responsibility will be to operate the existing network whilst leading an analysis of the current network architecture, designing the iterative developments needed to support the very high planned growth of our business, keeping a close eye on ongoing operational performance and robustness of the existing environment and being able to assist in technical troubleshooting. You will also be expected to lead the build of future iterations of the architecture across physical and virtual infrastructure, operating in an Agile environment appropriately configured to the need for continuous availability, rather than deployment.
You will take a hands-on role in network build-out and operation, working with a mix of internal and external engineering teams, including our cloud infrastructure suppliers, and you will be expected to ensure they are all working to a common network architecture and design. You must be able to rigorously segment and prioritise requirements according to the fast-changing


  • Design and build of all elements of network architecture and configuration for test and production environments for Corda Network customer services
  • Communication, documentation and promotion of the network architecture and the principles underpinning it
  • High availability and performance design of the physical and virtual network components
  • In conjunction with our security specialists, ensure a network security design consistent with our particular threat model
  • Provide firewall design, review and oversight
  • Provide feedback into infrastructure and software development teams regarding performance and stability of production environment from a networking perspective

Essential Skills

  • Advanced knowledge of networking principles and architecture, and specialism in TCP/IP and DNS, DHCP
  • Strong technical background in a hybrid hosted & cloud services environment (particularly Azure and AWS)
  • Experience of designing solutions for high availability, performance and security including firewall and load balancer deployment and configuration
  • Good experience of cloud service load balancing
  • Experience with Telco’s and Telco service procurement
  • Experience with Cisco router and ASA configuration and management
  • Excellent experience with network threat models, network security risks and the needs of security reviewers
  • Experience working with firewalls, intrusion prevention and intrusion detection systems
  • Strong experience of VPN management
  • Ability to define and clearly communicate a phased network architecture design and forward roadmap
  • Strong sense of technical discipline, attention to detail and need for accuracy
  • Strong commitment to configuration management and change discipline
  • Working knowledge of at least one contemporary scripting language. For preference: Python, and either Shell script or PowerShell.
  • Working with formal change control processes

Nice To Haves

  • Good experience of Infrastructure as Code
  • Experience with Kubernetes, ephemeral addressing
  • Software Defined Networks
  • Calico – networking for container solutions
  • Familiarity with bank-like processes to request and implement network changes
  • Experience of support and monitoring tooling
  • Experience of deploying cloud-based services in commercial institutions

At R3, we encourage a diverse and inclusive workforce. If you don’t meet all of the above criteria, but you think you’d be a great addition to R3, send us your CV. We’re always interested in meeting collaborative people who are excited to work with us.

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