Vodafone

International Roaming Network Support Specialist - VOIS

Pune, Maharashtra, India (city only)

Hybrid

First seen by offpeak October 22, 2026

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Who we are

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 #CreateTheFutur

About this Role

We are seeking an International Roaming Network Support Specialist to join Group Technology within TSSI Networks in Pune or Bengaluru. You will act as a subject matter expert for international roaming platforms and services, helping maintain their availability, security and performance. The role covers second-line operational support for 4G and 5G standalone and non-standalone networks, signalling platforms, roaming firewalls and value-added roaming services. You will resolve complex incidents, implement technical changes, improve network performance, support security remediation and contribute to the operational acceptance of new platforms.

What you will do

Own operational support for international roaming platforms, including services, applications, hardware, operating systems, databases, configurations and routing.
Investigate and resolve complex incidents within agreed service levels, complete root-cause analysis and implement permanent corrective actions.
Review, schedule and implement controlled changes, including software upgrades, capacity expansions, certificate renewals, security patches and hardware modifications.
Review changes proposed by external teams and suppliers, evaluating technical risks and protecting service continuity.
Monitor and optimise core network performance indicators, identify deviations and coordinate corrective action.
Troubleshoot protocol and signalling flows across 2G, 3G, 4G and 5G standalone and non-standalone networks.
Operate technologies such as Tekelec Diameter Routing Agent and Diameter Signalling Router, Oracle Eagle Signalling Transfer Point, Titanium Firewall and 5G Security Edge Protection Proxy, F5 DNS and TOMIA roaming services.
Coordinate with technology suppliers on complex incidents, defects, investigations and technical remediation.
Implement vulnerability remediation and platform hardening in line with applicable cyber security standards.
Review high-level and low-level designs for new projects, conduct operational design validation and support functional and non-functional testing.
Identify and implement improvements to operational tools, processes and workflows.
Share technical knowledge through workshops, documentation and team training.

Who you are

You have at least 12 years of experience in core telecommunications operations, including advanced configuration, incident and operational management of international roaming services.
You have practical experience with 4G and 5G technologies, including the 5G Security Edge Protection Proxy and N32 signalling.
You understand roaming and interconnect architectures and protocols, including Diameter, SS7, GTP control and user plane, Gx, Gy, packet core, HSS, STP, DRA, DNS, online charging and value-added roaming services.
You have experience operating Tekelec DRA/DSR, Oracle Eagle STP, Titanium Firewall, number portability databases, F5 DNS, Titanium 5G-SEPP or TOMIA platforms.
You understand Platform as a Service and Container as a Service environments, virtualisation, clustering and Kubernetes-based container orchestration.
You have at least five years of hands-on Linux administration experience across Red Hat Enterprise Linux, CentOS or Ubuntu, with confident use of Linux and Unix command-line tools.
You have practical knowledge of database administration, database troubleshooting, vulnerability management, certificate lifecycle activities and security hardening.
You apply structured analytical judgement to unfamiliar technical problems and can make risk-informed decisions during incidents and changes.
You communicate effectively across operational teams, engineering functions, external suppliers and stakeholders in different markets.
You are able to act as a subject matter expert while supporting collaborative learning and continuous service improvement.

Not a Perfect Fit?

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.

What’s in it for you

The opportunity to support business-critical international roaming services with a direct impact on network reliability and customer experience.
Exposure to complex, multi-generation telecommunications environments covering 2G, 3G, 4G and 5G technologies.
Collaboration with engineering teams, operational specialists, suppliers and stakeholders across international markets.
Opportunities to shape service improvements, strengthen cyber security controls and contribute to new technology transitions.
A specialist role that combines hands-on technical ownership, operational decision-making and knowledge sharing.

What skills you will learn

Advanced troubleshooting of international roaming signalling, routing and service flows.
Operational management of 5G standalone and non-standalone roaming technologies.
Security operations involving roaming firewalls, 5G-SEPP, platform hardening and vulnerability remediation.
Kubernetes-based platform operations within virtualised and containerised telecommunications environments.
Operational validation of technical designs, change procedures and new platform transitions.
Cross-market supplier management, incident coordination and root-cause analysis.
Development and delivery of technical training for specialist operational teams.

VOIS Equal Opportunity Employer Commitment

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.

Join Us

At Vodafone, we’re working hard to build a better future. A more connected, inclusive and sustainable world. As a dynamic global community, it's our human spirit, together with technology, that empowers us to achieve this.
We challenge and innovate in order to connect people, businesses, and communities across the world. Delighting our customers and earning their loyalty drive us, and we experiment, learn fast and get it done, together.
With us, you can be truly be yourself and belong, share inspiration, embrace new opportunities, thrive, and make a real difference.

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