Core Network Engineer

Overview

Core Network Engineer (Packet Core)

In our world things change by the millisecond.

We build the technology that creates amazing moments and better connects our customers. Ready to play your part? Join us and Be Phenomenal. Working towards the same shared goal of better connectivity, our tech teams enjoy a high degree of freedom. We love hearing ideas and seeing them come to life. With great resources, you'll get to be part of a team at the foundations of the transformation of our business. Who knows what the next innovation will be? That's what makes a career at Three so exciting. Since we set foot in Ireland, we've done things differently. Investing in infrastructure, we built a network that now connects 2.2 million customers nationwide, carrying more data than all alternative telecommunications providers combined. We take the script and rip it up, we're a big-hearted energetic bunch, striving for a better connected life. We encourage our employees to face their weaknesses, to really open themselves up to new tasks and projects in a super-charged and rich learning environment. We want you to become the best version of yourself.

Role purpose

Join us as a Core Network Engineer. This position resides in the Data Core Network Design team; a team which is accountable for ensuring the delivery of all designs for NFVI Infrastructure, EPC, 5G Core, IOT Slice, and DNS Core flows. Your focus will be related to (but not limited to) EPC and 5G Core design deliverables. The role reports to the Data Core Design Manager and will support vendor management for outsourced design services, ensuring wrap-around design continuity toward VAS, Service Layer, RAN, Transmission, IP, IT, and Service Delivery, as well as toward Test and Operations for both strategic and development change for the Core Networks. Your role will contribute to all aspects of the development of the future network (design/add, change and/or increase the networks services and resources for capacity, features and functionality). You will act as a point of technical accountability, working with functional stakeholders to establish appropriate responsibility levels and to influence without direct authority. Your approach will be customer focused and aligned to the commercial goals of the business, and you will drive our values in day to day technical and operational choices. You will be the technical authority for LTE EPC and 5G Core and responsible for the design and technical delivery of LTE EPC/5GC.

Responsibilities

• Responsible and accountable for capacity management; provide innovative solutions to ensure cost-effective growth, engage with vendors and stakeholders to ensure that Mobile Core network elements do not become bottlenecks affecting the customer experience.
• Drive Core Design deliveries from Solution Design through High Level Design, Low Level Designs, Databuild, and handover into Core Operations for implementation.
• Design deliveries for Mobile Core elements and interfaces to other network elements within the wider core network architecture.
• Collaborate with wider Core and RAN design and operations teams to ensure end-to-end design management and prioritisation of business needs.
• Align with Core Programme Delivery team to provide insight into detailed project planning; work with project managers throughout project life to maintain timelines.
• Coordinate with the Test team to ensure correct definition of test objects and review test results to ensure successful implementation of new designs and solutions.
• Support Core Operations to translate design process outputs into accurate node configuration and Method of Procedure integration documentation.

Qualifications and experience

• Educated to degree level in an Engineering/Telecommunications/Computer Science discipline, or equivalent experience.
• 5+ years experience in packet core network design and lifecycle management, including performance and capacity management projects.
• Experience within ITIL v4 framework, with hands-on experience using BMC Helix for creation and tracking of implementation CRQs.
• Proven track record in continuous improvement and driving efficiencies while maintaining high levels of customer satisfaction.
• Excellent working knowledge of Mobile Core networks architecture, elements, and protocols including 3GPP interfaces such as SIP, GTP, DIAMETER, RADIUS, SIGTRAN, BICC, MAP, Cap and INAP.
• Good understanding of IoT technologies, including NB-IoT, Cat-M, PSM, eDRX and REDCap.
• Excellent communication skills, both verbal and written, with the ability to engage across business areas at varying technical levels.

Nice to have

• Knowledge of 3G MCC elements and key interfaces and protocols (GTP, DIAMETER, RADIUS, SIGTRAN, BICC, MAP, Cap and INAP).
• Experience with Ericsson core network systems.
• VoIP/VoLTE/VToW/VoNR deployment and testing experience.
• Knowledge of IPv6 implementation in a telecom environment.
• Knowledge of Automation APIs including Python, Ansible, Netconf, Restconf; experience with Postman and REST.
• Working knowledge of IP networks; SD-WAN experience and familiarity with leading IP vendor equipment.
• Cisco/Juniper certifications (CCNA/CCNP) are a plus.

Benefits of Working at Three

• Flexible hybrid model with three days per week in the office; location dependent.
• Competitive salary, annual performance bonus and pension contribution.
• 25 days holidays plus 2.5 company days.
• Annual Leave buy or sell up to 5 days per year.
• Healthcare Insurance through our flexible benefits programme.
• Life assurance, provided device (phone & laptop), subsidised canteen.
• Access to learning and development tools.
• Free on-site parking.
• There's a lot more to us than meets the eye.

Equality, diversity and inclusion

At Three, we are committed to diversity and inclusion. As Ireland's largest mobile telecommunications provider, we provide a better connected life for our diverse customer base, and want our teams to reflect this. We welcome and celebrate all identities and strive to create a culture of belonging where employees can thrive as their authentic selves. If you do not 'tick every box' in this job description, you likely have other valuable skills that would make you a great fit for one of our teams. If you feel this role is for you, then please apply

If you require reasonable adjustments for your interview, please let us know when scheduling your interview, or email aoife.omeara@three.ie

How to apply — Apply now at: https://www.three.ie/careers

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