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IoT 2nd Line CS Engineer (HLR, HSS)

Aggregate function:  Technology
Business Area:  VT Network Operations
Posting Country:  Romania
Date Posted:  21 Apr 2026
Full Time / Part Time:  Full Time
Contract Type:  Permanent

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.

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 #CreateTheFuture

About this Role

We are seeking a skilled and motivated IoT 2nd Line Voice & SMSC Engineer to join our Network Application Operations team within VOIS Romania. This role focuses on the development, maintenance, and optimisation of complex IT and telecom systems that enable enterprise customers to achieve connectivity and smart automation through the Vodafone Global Internet of Things platform. Based in Bucharest, the role plays a key part in ensuring high availability, performance, and continuous improvement of critical customer-facing services, while supporting the transition of solutions from development into live operations.

What you will do

  • Develop, test, implement, and maintain scripts and software solutions used by Vodafone IoT enterprise customers.
  • Ensure network, software, and tooling systems operate reliably, supporting critical applications to minimise downtime and service disruption.
  • Modify and adapt software solutions to enhance performance, scalability, and customer experience.
  • Review technical and functional specifications and translate them into effective hardware and software implementations.
  • Perform impact analysis and design technical solutions to resolve incidents and complex technical issues.
  • Provide high-level 2nd Line technical support for network applications and systems, including participation in on-call rotas outside business hours.
  • Implement changes and maintenance activities in line with defined procedures, including documentation of configurations and code changes.
  • Contribute to the creation and maintenance of operational documentation, procedures, and work instructions.
  • Identify opportunities for automation and develop scripts to improve efficiency and system performance.
  • Work in line with operational agreements and service performance indicators such as response time, speed, and error rates.

Who you are

  • An experienced telecom or IT professional with hands-on exposure to Telecom Core services, including CS, VoLTE (IMS), and SMS services.
  • Comfortable working with Linux/UNIX command-line environments across any distribution.
  • Experienced with Telecom Core Circuit Switch technologies, SS7 protocols, and platforms such as SMSC, NGIN, CSDB, HLR, and HSS, with
  • knowledge of 3G/4G packet-switched networks.
  • Knowledgeable in SIP and Diameter protocols and IMS interfaces.
  • Familiar with virtualisation and orchestration tools such as VMware, Docker, or Kubernetes.
  • Confident in IP networking concepts, equipment, and protocols.
  • Experienced with SOAP and REST APIs, microservices, SOA, and web servers such as Apache.
  • Able to script or program in languages such as Bash, Perl, Python, Java, or C/C++.
  • Analytical and methodical in solving advanced technical problems and implementing sustainable solutions.
  • Comfortable working in a multinational environment and communicating in English at B2–C1 level.
  • Ideally certified or knowledgeable in areas such as CCNA, LPIC1, Oracle Certified Associate, ITIL, and packet capture tools like Wireshark or tcpdump.

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

- Hybrid way of working: 2 days per week/ 8 per month
- Medical and dental services
- Life and hospitalization insurance
- Dedicated employee phone subscription
- Take control of your benefits and choose any of the below options: MEAL TICKETS/ PRIVATE PENSION/VACATION VOUCHERS/ CULTURAL VOUCHERS within the budget.
- Special discounts for gyms and retailers
- Annual Company Bonus
- Ongoing Education – we continuously invest in you to ensure you have everything needed to excel on the job and enhance your skills 
- You get to work with tried and trusted web-technology
- We let you write your own story by planning vacations: go for a trip, experience new things, have fun and enjoy your 23 days off.
- Special Paternal Program - 4 months of paid paternity leave
 
We recognize and celebrate the importance of diversity and inclusivity in our workplace so that we are as diverse as the customers and communities we serve. We do not tolerate any form of discrimination especially related to but not limited to race, color, age, veteran status, gender identification, sexual orientation, pregnancy, ethnicity, disability, religion, political affiliation, trade union membership, nationality, indigenous status, medical condition, HIV status, social origin, cultural background, social or marital status. 

Worried that you don’t meet all the desired criteria exactly? We are passionate about Inclusion for All and creating a workplace where everyone can thrive, whatever their personal or professional background. So, if you’re excited about this role but your experience doesn’t align exactly with every part of the job advert, we encourage you to apply as you may be just the right candidate for this role or another role, and our recruitment team can help see how your skills fit in. 

What skills you will learn

  • Advanced operational knowledge of Vodafone’s Global IoT, Voice, and SMS platforms.
  • Deeper expertise in IMS, VoLTE, and core network integrations within enterprise environments.
  • Practical experience in automation, scripting, and system optimisation at scale.
  • Enhanced incident management, root cause analysis, and stakeholder communication skills.

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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Vodafone is committed to attracting, developing and retaining the very best people by offering a motivating and inclusive workplace in which talent is truly recognised and rewarded. We are committed to promoting Inclusion for All with the belief that diversity plays an important role in the success of our business. We actively encourage everyone to consider becoming a part of our journey.

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