2L Voice Core Specialist - VOIS

VOIS (Vodafone Intelligent Solutions) is a strategic arm of Vodafone Group Plc, creating value for customers by delivering intelligent solutions through Talent, Technology & Transformation.
As the largest shared services organisation in the global telco industry with 30,000 FTE, our portfolio of next-generation solutions and services are designed in partnership with customers across Vodafone Group, local markets, and partner markets to simplify and drive growth. With our strategic partner Accenture, we work alongside our Vodafone customers, other Telco and tech companies to drive transformation, meet the challenges of our industry and ensure we stay relevant and resilient. This partnership is a unique, industry-first model which brings together the best of in-house and 3rd party capability.
We work with customers across 28 countries from 10 VOIS locations: Albania, Egypt, Hungary, India, Romania, Spain, Turkey, UK, Germany, Ireland, and with a network of teams in Czech Republic, Italy, Greece, and Portugal.
#VOIS #BeUnrivalled #CreateTheFuture

• Support and manage IMS and CS Core network elements such as MTAS, CSCF, HSS, IPWorks, MSC, MGW, SBC, and STP.
• Safeguard service availability through maintenance, monitoring, and resolving incidents.
• Participate in a 24x7 on-call rotation to ensure timely support.
• Analyse service failures, conduct root cause analyses, and implement sustainable resolutions.
• Monitor KPIs, identify performance trends, and propose improvements to protect network availability.
• Perform regular health checks, resilience assessments, and proactive service assurance tasks.
• Configure new number ranges, support fraud barring requirements, and assist in isolating network nodes when needed.
• Support supplier and vendor management, SLA adherence, and audit preparations.
• Contribute to change management processes ensuring risk-free implementation of planned changes.
• Assist in software lifecycle management, including testing and rollout of new software versions.
• Promote knowledge sharing and provide guidance to less experienced team members.
• Communicate effectively with stakeholders, ensuring clarity in technical updates and issues.

Skilled in IMS architecture (CSCF, MTAS, HSS, SBC) and CS Core network components (MSC, MGW).Experienced in telecom protocols including SIP, Diameter, SS7, and SIGTRAN.Knowledgeable in VoLTE or VoNR call flows and IMS registration procedures.Comfortable working in virtualised environments such as VMware, OpenStack, and Linux OS.Able to apply troubleshooting skills using tools and scripting languages (Python or Bash preferred).Adaptive, collaborative, and able to work effectively within a 24x7 operational environment.Holds experience working in multi-vendor environments (Ericsson, Huawei, Nokia).Possesses a Bachelor’s degree in Telecommunications, Electronics, or Computer Engineering, with relevant certifications preferred.

Concerned you may not meet every requirement? Vodafone is committed to creating an inclusive workplace where everyone can thrive. If you are excited about this role but your experience does not align exactly with every aspect of the job description, you are encouraged to apply. You may be the right candidate for this or another opportunity, and the recruitment team will support you in exploring where your skills fit best.

Opportunities to gain exposure to advanced IMS and CS Core technologies and multi-vendor environments.Experience collaborating with global teams and industry-leading partners.Engagement in innovative transformation initiatives across the telco domain.A supportive environment encouraging knowledge sharing, upskilling, and professional growth.

Advanced troubleshooting and performance analysis across IMS and CS Core systems.Vendor and SLA management within complex telecom ecosystems.Change management and risk-controlled implementation techniques.Service assurance practices including resilience testing and KPI-based optimisation.Cross-functional collaboration and communication within a global operations setup.

Vodafone recognises and celebrates the value of diversity in building a workforce that reflects the customers and communities it serves. No form of discrimination is tolerated. This includes, but is not limited to, discrimination based on race, colour, age, veteran status, gender identity, gender expression, sexual orientation, pregnancy, maternity or parental status, ethnicity, disability, religion or belief, political affiliation, trade union membership, nationality, citizenship, indigenous status, medical condition, HIV status, neurodiversity, social origin, cultural background, marital or civil partnership status, or socio-economic background.

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