Job Title: IMS Engineer Location: Reading (Hybrid) Role Overview Responsible for design, integration, and support of IMS core networks enabling VoLTE/VoWiFi services, ensuring high availability and service performance. Key Responsibilities Manage and support IMS nodes (CSCF, HSS/UDM, SBC, TAS) Troubleshoot SIP/Diameter call flows and perform RCA Support VoLTE/VoWiFi service delivery and optimization Handle L2/L3 incidents and ensure SLA adherence Lead upgrades, integrations, and new service rollouts Collaborate with RAN, Core, and vendor teams Required Skills Strong IMS architecture knowledge (SIP, Diameter, VoLTE call flows) Hands-on troubleshooting (Wireshark, traces) Experience with LTE/5G Core integration Linux/Unix; Scripting (Python/Shell preferred) Preferred Experience with vendors like Ericsson, Nokia, Huawei Exposure to UK operators such as Vodafone or BT Group Knowledge of NFV/Cloud (OpenStack/Kubernetes)
Apr 15, 2026
Contractor
Job Title: IMS Engineer Location: Reading (Hybrid) Role Overview Responsible for design, integration, and support of IMS core networks enabling VoLTE/VoWiFi services, ensuring high availability and service performance. Key Responsibilities Manage and support IMS nodes (CSCF, HSS/UDM, SBC, TAS) Troubleshoot SIP/Diameter call flows and perform RCA Support VoLTE/VoWiFi service delivery and optimization Handle L2/L3 incidents and ensure SLA adherence Lead upgrades, integrations, and new service rollouts Collaborate with RAN, Core, and vendor teams Required Skills Strong IMS architecture knowledge (SIP, Diameter, VoLTE call flows) Hands-on troubleshooting (Wireshark, traces) Experience with LTE/5G Core integration Linux/Unix; Scripting (Python/Shell preferred) Preferred Experience with vendors like Ericsson, Nokia, Huawei Exposure to UK operators such as Vodafone or BT Group Knowledge of NFV/Cloud (OpenStack/Kubernetes)
System Engineer - CCSDS & LunaNet (LLD Focus) Overview We are seeking a System Engineer with strong CCSDS and LunaNet experience to support the detailed design and implementation of space communication architectures . The role focuses on low-level system design, interface definition, and protocol implementation , rather than high-level architecture. Key Responsibilities Develop Low-Level Design (LLD) documentation for space communication systems. Implement and define interfaces aligned with CCSDS standards . Support LunaNet-compatible architecture and protocol implementation . Define detailed message flows, protocol stacks, and interface control documents (ICDs) . Work with software, network and flight/ground segment teams to ensure interoperability and standards compliance . Support system integration, verification and validation activities. Contribute to simulation and test scenarios for deep-space communications . Analyse link performance, data routing and network behaviours within LunaNet environments. Required Skills & Experience Strong experience with CCSDS standards (eg space packet protocol, CFDP, DTN/BP, TM/TC). Experience with LunaNet architecture and interoperability concepts . Proven work on Low-Level Design (LLD) and interface definition. Experience with deep-space communications or space networking systems . Familiarity with Delay/Disruption Tolerant Networking (DTN) . Experience writing ICDs, protocol specifications and interface documentation . Experience supporting system integration and test campaigns . Desirable Experience with NASA or ESA communication architectures . Knowledge of optical communications or advanced space networking . Experience with space mission ground/flight systems integration .
Apr 14, 2026
Contractor
System Engineer - CCSDS & LunaNet (LLD Focus) Overview We are seeking a System Engineer with strong CCSDS and LunaNet experience to support the detailed design and implementation of space communication architectures . The role focuses on low-level system design, interface definition, and protocol implementation , rather than high-level architecture. Key Responsibilities Develop Low-Level Design (LLD) documentation for space communication systems. Implement and define interfaces aligned with CCSDS standards . Support LunaNet-compatible architecture and protocol implementation . Define detailed message flows, protocol stacks, and interface control documents (ICDs) . Work with software, network and flight/ground segment teams to ensure interoperability and standards compliance . Support system integration, verification and validation activities. Contribute to simulation and test scenarios for deep-space communications . Analyse link performance, data routing and network behaviours within LunaNet environments. Required Skills & Experience Strong experience with CCSDS standards (eg space packet protocol, CFDP, DTN/BP, TM/TC). Experience with LunaNet architecture and interoperability concepts . Proven work on Low-Level Design (LLD) and interface definition. Experience with deep-space communications or space networking systems . Familiarity with Delay/Disruption Tolerant Networking (DTN) . Experience writing ICDs, protocol specifications and interface documentation . Experience supporting system integration and test campaigns . Desirable Experience with NASA or ESA communication architectures . Knowledge of optical communications or advanced space networking . Experience with space mission ground/flight systems integration .
Earth Ground Segment Consultant (Senior) Role: Earth Ground Segment Consultant Type: Senior Consultant/Advisor Overview We are seeking a senior Earth Ground Segment consultant with extensive experience in ground segment architecture, operations and space mission infrastructure , with a skill profile similar to senior experts working across ESA/commercial space programmes . The consultant will provide strategic and technical expertise across ground segment systems , including design, operations, integration and modernization. Key Responsibilities Provide expert advisory support on Earth ground segment architecture . Support design and optimisation of mission ground infrastructure . Define ground segment operational concepts and service models . Contribute to ground system architecture reviews and programme planning . Support development of network operations concepts and service provisioning . Advise on integration of ground stations, network infrastructure and mission control systems . Support procurement strategies and supplier technical evaluation . Contribute to ground segment modernization and interoperability initiatives . Required Skills & Experience Extensive experience in Earth observation or space mission ground segments . Expertise across ground station networks, mission control systems and data processing chains . Experience with ESA/NASA-style ground segment architectures . Knowledge of space communications infrastructure and network operations . Experience with ground segment service delivery models and operations . Strong experience supporting multi-stakeholder space programmes . Desirable Experience with multi-mission ground systems . Experience with commercial ground station networks . Familiarity with cloud-based ground segment architectures and data platforms . Experience advising agencies or large space programmes.
Apr 14, 2026
Contractor
Earth Ground Segment Consultant (Senior) Role: Earth Ground Segment Consultant Type: Senior Consultant/Advisor Overview We are seeking a senior Earth Ground Segment consultant with extensive experience in ground segment architecture, operations and space mission infrastructure , with a skill profile similar to senior experts working across ESA/commercial space programmes . The consultant will provide strategic and technical expertise across ground segment systems , including design, operations, integration and modernization. Key Responsibilities Provide expert advisory support on Earth ground segment architecture . Support design and optimisation of mission ground infrastructure . Define ground segment operational concepts and service models . Contribute to ground system architecture reviews and programme planning . Support development of network operations concepts and service provisioning . Advise on integration of ground stations, network infrastructure and mission control systems . Support procurement strategies and supplier technical evaluation . Contribute to ground segment modernization and interoperability initiatives . Required Skills & Experience Extensive experience in Earth observation or space mission ground segments . Expertise across ground station networks, mission control systems and data processing chains . Experience with ESA/NASA-style ground segment architectures . Knowledge of space communications infrastructure and network operations . Experience with ground segment service delivery models and operations . Strong experience supporting multi-stakeholder space programmes . Desirable Experience with multi-mission ground systems . Experience with commercial ground station networks . Familiarity with cloud-based ground segment architectures and data platforms . Experience advising agencies or large space programmes.
F5 Resident Engineer This role is primarily remote, with occasional on-site attendance required at locations in southern cities. The engineer will act as the day-to-day operational owner of the F5 estate, covering BAU operations, incidents, changes, and life cycle support. Engineer Responsibilities Incident support and troubleshooting (P1-P3) BAU operations and service monitoring Configuration changes across LTM, DNS, ASM, and APM SSL certificate management and renewals WAF policy tuning and onboarding of partner services DNS/GSLB traffic steering and site failover support Support for upgrades, pre-prod testing, and production promotions Collaboration with internal customer and vendor teams Required Skills Mandatory: Senior-level experience with F5 BIG-IP LTM Strong hands-on experience with BIG-IP DNS/GSLB ASM (WAF) policy management and tuning APM/SSL VPN configuration and support Ability to read, troubleshoot, and modify iRules Experience supporting 24x7 production environments Strongly preferred: Service provider/telco network experience Multi-site, HA and failover architectures Proxy environments (forward and reverse) Exposure to BIG-IQ and centralised licensing models
Apr 13, 2026
Contractor
F5 Resident Engineer This role is primarily remote, with occasional on-site attendance required at locations in southern cities. The engineer will act as the day-to-day operational owner of the F5 estate, covering BAU operations, incidents, changes, and life cycle support. Engineer Responsibilities Incident support and troubleshooting (P1-P3) BAU operations and service monitoring Configuration changes across LTM, DNS, ASM, and APM SSL certificate management and renewals WAF policy tuning and onboarding of partner services DNS/GSLB traffic steering and site failover support Support for upgrades, pre-prod testing, and production promotions Collaboration with internal customer and vendor teams Required Skills Mandatory: Senior-level experience with F5 BIG-IP LTM Strong hands-on experience with BIG-IP DNS/GSLB ASM (WAF) policy management and tuning APM/SSL VPN configuration and support Ability to read, troubleshoot, and modify iRules Experience supporting 24x7 production environments Strongly preferred: Service provider/telco network experience Multi-site, HA and failover architectures Proxy environments (forward and reverse) Exposure to BIG-IQ and centralised licensing models
Role Specification: Test Automation & Performance Engineer Key Skillset and Responsibilities: VoIP Performance Testing: Hands-on experience with SIP/VoIP call performance testing tools such as SIPp, Spectra, WinSIP, and StarTrinity . Ability to design, execute, and analyse large-scale call performance scenarios. Automation Development: Proficient in Python and Robot Framework for test automation. Experience developing and maintaining automated test suites across multiple domains (API, GUI, performance). API Testing & Performance Engineering: Skilled in API test automation and load testing using tools like Locust, BlazeMeter/Taurus, k6, Newman, and JMeter . Capable of designing scalable test strategies for API and system-level performance validation. GUI Test Automation: Strong understanding of Front End automation using TestCafe, Robot Framework, and Selenium . Familiar with browser automation best practices and test stability optimization. Continuous Integration & Delivery (CI/CD): Experience integrating automated tests into CI/CD pipelines for continuous validation. Familiarity with common CI/CD tools (eg, Jenkins, GitLab CI, Azure DevOps). Infrastructure & Automation Tools: Working knowledge of Ansible and Terraform for Linux-based environment setup and infrastructure automation. System Administration: Basic Linux and Windows administration skills, including environment configuration, log analysis, and troubleshooting.
Oct 08, 2025
Contractor
Role Specification: Test Automation & Performance Engineer Key Skillset and Responsibilities: VoIP Performance Testing: Hands-on experience with SIP/VoIP call performance testing tools such as SIPp, Spectra, WinSIP, and StarTrinity . Ability to design, execute, and analyse large-scale call performance scenarios. Automation Development: Proficient in Python and Robot Framework for test automation. Experience developing and maintaining automated test suites across multiple domains (API, GUI, performance). API Testing & Performance Engineering: Skilled in API test automation and load testing using tools like Locust, BlazeMeter/Taurus, k6, Newman, and JMeter . Capable of designing scalable test strategies for API and system-level performance validation. GUI Test Automation: Strong understanding of Front End automation using TestCafe, Robot Framework, and Selenium . Familiar with browser automation best practices and test stability optimization. Continuous Integration & Delivery (CI/CD): Experience integrating automated tests into CI/CD pipelines for continuous validation. Familiarity with common CI/CD tools (eg, Jenkins, GitLab CI, Azure DevOps). Infrastructure & Automation Tools: Working knowledge of Ansible and Terraform for Linux-based environment setup and infrastructure automation. System Administration: Basic Linux and Windows administration skills, including environment configuration, log analysis, and troubleshooting.
