Network Design Specialist , London, United Kingdom)

Recruiter: Trevor Newman

Career Grade: D

External Closing Date: 17/04/25

(Our hybrid working model means you are expected to be in the office 3 days per week)

With over 175 years of heritage, BT is now the flagship business brand of BT Group. We’ve brought together our best people and capabilities into a B2B powerhouse serving 1.2 million business customers internationally.

We’re a global leader for secure connectivity and collaboration platforms for businesses of all shapes and sizes, from big household names and government departments, right through to sole traders and new start-ups. But it’s not just the technology that matters, it’s what it can do to help them build stronger, smarter, more secure businesses.

We value diversity and inclusion and believe in making a positive impact. We connect for good by championing digital inclusion and equipping people, businesses, and communities with digital skills to thrive.

As a member of our team, you will be part of an organisation that celebrates difference, fosters innovation and provides you with opportunities to be your best. With millions of businesses relying on us daily, joining BT means you can be part of a diverse and multi-skilled team that makes a significant impact to society

Why this job matters

The BT Mobile network is currently the best performing network in the UK, according to external benchmarking studies. The IMS & Mobile Voice team is tasked with designing and planning the capacity of a network that serves over 30 million users across 2G, 3G, 4G, 5G, Wi-Fi, and Fixed telephony. As a Solution Architect Specialist, you will have the chance to work with a variety of technologies, from the latest IMS innovations to traditional circuit-switched technology. You will be responsible for designing, delivering, and maintaining voice services for both fixed and mobile customers from Consumer and Enterprise Customer Facing Units. In this role, you will be involved in voice services and voice platform design and capacity management, either leading the design or supporting projects and BAU activities. You will also have the opportunity to shape the strategic direction of the Voice Network through interactions with Senior Management, CFUs, and the Architecture community.

What you’ll be doing

Accountable for detailed voice design inputs and outputs at both platform and service levels. Responsible for creating and maintaining high-quality high-level and low-level voice design documentation. Represent the team in project engagements, contributing team requirements and deliverables from concept to launch. Demonstrate excellent communication skills (oral and written) with the team, senior management, and other internal/external teams as needed. Design scalable and resilient voice solutions using the best technology to attract new customers and ensure existing customers have the best experience possible. Monitor the capacity of voice platforms and their associated interfaces that the team is responsible for. Plan and deliver necessary capacity upgrades, configuration changes, and migration activities. Collaborate closely with test and operations teams and other stakeholders across "Networks" to ensure the stability of voice solutions. Provide technical expertise and consultancy within BT and with external vendors. Support and coach team members on voice core design activities Provides technical expertise to inform contract and commercial management Creates and implements technical solutions for a domain or across domains / portfolios of work within a specific technology area. Strong experience of producing great documentation for complex solutions Excellent troubleshooting and low-level diagnostic ability Detailed understanding of voice core networks as well as wider understanding of mobile and BT core networks and services Analytical thinking with the ability to analyse and interpret data, network statistics and financial details.

The skill you'll need

Expert knowledge and experience with IMS technologies and related voice services, including VoLTE, VoWiFi, Interconnect, Fixed, and 5G. Extensive design experience in the IMS Voice Services domain. Strong, mature knowledge and experience with telecom voice solutions based on virtualized technology, such as VMware and COTS. Solid, mature knowledge and experience with telecom voice solutions utilizing private or public cloud technologies, including containerization, Kubernetes, Linux, and OpenStack software. Practical and expert knowledge and experience with protocols such as SIP, HTTP, Diameter, DNS, BICC, ISUP, CAP, and INAP. Hands-on experience with subscriber provisioning processes and systems. Proficiency in telecom platform and software security skills. Made decisions in ambiguous situations using incomplete information or differing opinions (e.g., divided project team opinions or unclear deliverables). Demonstratable experience in mobile voice network design roles. Good communication skills that simply explain technical details to varied audiences up to and including Director level. Ability to Work with multiple teams and vendors to drive network customisations to enhance features and functionality. Collaborating positively with others in and outside BT to drive best solutions and practices. Ability to develop an internal network of strong working relationships you can call on to assist with your role.

Our leadership standards

Looking in: Leading inclusively and Safely I inspire and build trust through self-awareness, honesty and integrity. Owning outcomes I take the right decisions that benefit the broader organisation.

Looking out: Delivering for the customer I execute brilliantly on clear priorities that add value to our customers and the wider business. Commercially savvy I demonstrate strong commercial focus, bringing an external perspective to decision-making.

Looking to the future: Growth mindset I experiment and identify opportunities for growth for both myself and the organisation. Building for the future I build diverse future-ready teams where all individuals can be at their best.

A FEW POINTS TO NOTE:

Although these roles are listed as full-time, if you’re a job share partnership, work reduced hours, or any other way of working flexibly, please still get in touch.

We will also offer reasonable adjustments for the selection process if required, so please do not hesitate to inform us.

DON'T MEET EVERY SINGLE REQUIREMENT?

Studies have shown that women and people who are disabled, LGBTQ+, neurodiverse or from ethnic minority backgrounds are less likely to apply for jobs unless they meet every single qualification and criteria. We're committed to building a diverse, inclusive, and authentic workplace where everyone can be their best, so if you're excited about this role but your past experience doesn't align perfectly with every requirement on the Job Description, please apply anyway - you may just be the right candidate for this or other roles in our wider team.

BENEFITS:

Annual On target bonus 10% (personal and company multipliers) BT Pension scheme; minimum 5% employee contribution, BT contribution 10% Life Assurance Direct share scheme Exclusive colleague discounts on our latest and greatest BT broadband packages 50% off EE mobile pay monthly or SIM only plans and 50% discount for friends and family on EE SIM only plans My Discounts gives colleagues access to unbeatable savings on everyday purchases at hundreds of retailers Discounted EE TV including TNT Sport and the NOW Entertainment membership Great support for working parents including pay whilst on maternity, adoptive, and paternity leave Option to join the Healthcare Cash Plan or other benefits such as dental insurance, gym memberships etc. 25 days annual leave (not including bank holidays), increasing with service with buy holiday option Volunteering days so you can give back to your local community Brand new electric vehicle salary sacrifice arrangement, known as ‘My EV’