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Interface Designer - ESN

Job Req ID:  53993
Posting Date:  9 Dec 2025
Function:  Design
Unit:  Networks
Location: 

Assembly, Bristol, United Kingdom

Salary:  Competitive, plus benefits

Location(s)- Bristol

Why this job matters

The RAN network has grown increasingly complex over recent years. We now have 3 technology layers, with multiple carriers. The technology can be delivered in hundreds of combinations depending on the environment and capacity to support our customers. This is delivered by three main macro vendors.

As an Interface Designer, you will be responsible for delivering the E2E technical solutions deployed within the RAN, this includes complete Radio Network Design (All technologies) and ensuring that the produced designs meet the quality within the agreed time frame to keep EE number 1. You will primarily cover Mission Critical Network design on 4G & 5G+. Ensure the work is delivered with the high standard in the challenging timeframe.

You’ll work with the wider Design/strategy teams and vendor to deliver and deploy the designs as per the agreed network strategy within the software cycles.  Co-ordinate with vendors and test partners to meet the business needs.  

You will be required to undergo National Security Vetting to SC or NPPV level.

What you’ll be doing

  • Creating and implementing technical solutions for a domain or cross domains / portfolios of work within a specific technology area autonomously, understanding how solutions impact systems internally and/or externally and assessing impact of change.
  • Providing technical quality assurance over work of other engineers through matrix team structure.
  • Providing sound technical expertise to consult on significant component(s) of a technical solution within a specific domain or cross domain.
  • Identifying opportunities to improve standards of practice within a project, continuously enhancing ways of working.
  • Delivering resolutions to problems that tend to be complex, cross-domain or of high impact to customers.
  • Work both within the team and across the department to ensure deliveries are on time, and to a high level of quality
  • Work in conjunction with internal Design/Optimization/Deployment/Operations and our external customers and suppliers to ensure appropriate End to End solutions are delivered to ensure RAN Design & Customer experience KPI Targets are maintained/exceeded
  • Support the field trials of new products, software releases and features prior to wider deployments.
  • Liaise with wider teams to develop design scopes & requirements
  • Develop, review & comment on low level designs from vendors.
  • Analyse and inform technical projects, ensuring planned deliveries are achievable, they call on the most appropriate technical options available and are effectively managing risks and issues.
  • Deliver process optimisation that brings benefits to both our customers and to BT.
  • Ensuring the EE network remains the number one performing network in the UK
  • Driving the vendor to meet BT’s targets.

What we would like to see on your CV

  • Expert knowledge and hands on 4G & 5G (NSA & SA) design experience.
  • Experience in Mobile Radio Access Network Design, planning or delivery in 4G or 5G.
  • Familiarity with test software & devices (Accuver).
  • Able to analyse in depth, drive test logs, Wireshark traces and protocol analysers traces for 4G & 5G networks
  • Proven experience working with and building relationships with both internal and external stakeholders up to Director level

The skills you’ll need

Vendor Management
Network Design

Benefits

At BT, we entertain, educate, and empower millions of people every single day. We’re a brand built on connecting people – whether that’s friends, family, businesses, or communities. Working here, you’ll receive an attractive salary and a range of competitive benefits, but – more than that – you’ll be joining an ambitious organisation with a culture of togetherness, collaboration, and inclusivity, that takes a genuine and proactive interest in your progress and development.


•    10% on target annual bonus 
•    BT Pension scheme, minimum 5% employee contribution, BT contribution 10%
•    X4 Salary Life Assurance
•    Huge range of flexible benefits including Cycle to Work, Healthcare, Season Ticket Loan, Electric Vehicle Salary Sacrifice
•    25 days annual leave (not including bank holidays), increasing with service
•    From January 2025, equal family leave:  receive 18 weeks at full pay, 8 weeks at half pay and 26 weeks at the statutory rate. It’s for all parents, no matter how your family is made up.
•    Enhanced women’s health support: including help with menopause symptoms, cancer screenings, period care and more.
•    24/7 private virtual GP appointments for UK colleagues
•    2 weeks paid carer’s leave 
•    World-class training and development opportunities
•    Option to join BT Shares Saving schemes
•    Discounted broadband, mobile and TV package
•    Access to 100’s of retail discounts including the BT shop


Flexible Working
This role offers a 3 together, 2 wherever working model. This means you are required to be at your contractual location 3 days a week with 2 flexible 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.

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.

 

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