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BT Group • GBR-London-BTHQ One Braham

Specialist Design Engineer, Voice

Employment type:  Full time
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Job Description

Working Locations: Bristol, London

Working Style: 3 days a week in office, 2 days anywhere

About the role

Microsoft Teams is a massive growth area for BT. We are at a major turning point in the UC marketplace with more and more solutions moving from on-prem to vendor clouds such as Office 365. This role is key in providing innovative, cost-effective ways to compliment these services by enabling PSTN connectivity and providing an end-end service wrap with enhanced QoE tools and reporting.

We are looking for a Specialist Design Engineer, voice to be Subject Matter Expert for Microsoft Teams Direct Routing and Operator Connect with responsibility for technical design, deployment and support of various platforms providing Enterprise Voice for BT business customer both direct and through Wholesale.

What you’ll be doing

  • Design & configuration of Audiocodes SBCs connected to a variety of SIP trunking platforms from Enterprise and Wholesale.
  • Design & deployment of hosting environment in Azure including support for High Availability.
  • Design, deployment & testing of new Teams features such as Local Media Optimisation.
  • Engaging with customers to provide expertise and consultancy on both technical architecture and troubleshooting. Eg assisting with “must win” opportunities.
  • 4th line support to key stakeholders.
  • Design responsibility for hybrid cloud platforms such as Zoom which make use of the same SBC hosted architecture.
  • Maintaining awareness of technical trends and innovation across the UC marketplace and sharing with stakeholders in the LoBs to help BT gain an early mover advantage where appropriate.
  • Driving efficiency and scalability through the re-use of technical designs and automation.
  • Proactively simplifying and enhancing the architecture to improve customer experience.

Essential Skills / Experience

  • Expert knowledge in Zoom / Skype for Business or Office365 including Skype Online or Teams.
  • Knowledge of the Enterprise voice (preferably Microsoft) portfolio and marketplace.
  • Knowledge of voice, collaboration and technology trends.
  • Experience of consultancy, design, deliver and migration of Microsoft / voice solutions (Skype, Teams Office365).
  • Have a background in producing detailed design documents for a technical audience.
  • Be able to consider how any given product or feature will not only be deployed, but how it will supported and maintained in-life, how it will be ordered, and how faults will be resolved.
  • Expert knowledge of the different consumption models Wholesale/Direct and how changes in API’s will impact each line of business.
  • Work alongside suppliers, third parties and other teams within BT, such as security, firewalls and data networks.
  • Collaborate with cross-functional teams, suppliers to deliver secure & reliable solution and to ensure technical designs align with product and platform requirements.

Desirable Skills / Experience

  • Be passionate about working with new technologies and product.
  • Have the ability to work independently on complex voice and data solutions.
  • Have experience with Microsoft voice technologies /Teams including Operator connect.
  • Be comfortable presenting completed solutions to relevant BT teams.
  • Be comfortable working across multiple projects simultaneously.
  • Externally recognised credentials such as Microsoft MCSE Communications / Productivity or equivalent.

Our Package

Tailored benefits make a real difference. That’s why we offer a comprehensive range to support your growth, wellbeing, and everyday life.
You can design the package to suit you and your lifestyle. Your core benefits include:


• 10% on target annual bonus
• Access to an online private GP 24/7 for you and your immediate family
• Market-leading paid carers leave with up to 2 weeks off
• Equalized maternity, paternity, and adoption leave – 18 weeks’ full pay and 8 weeks’ half pay
• Discounted EE and BT products, including mobile and broadband
• Market leading Pension scheme – 5% from you and 10% from us
• Holiday purchase scheme


You can select additional benefits, including healthcare, dental, gym memberships and more when you’re ready.
Ready to connect for good and help shape the future? Apply now

BT Group is the UK’s leading communications group and the holding company behind some of the country’s most recognised brands – including BT, EE, Openreach and Plusnet. Our purpose is as simple as it is ambitious: we connect for good. Our customers include consumers, small, medium and large businesses, public sector organisations and other communications providers.

BT Group’s role is about setting direction, unlocking value and creating the conditions for our brands and businesses to thrive.

Having come through the most capital-intensive phase of our fibre investment, our focus now is on what comes next – simplifying how we operate, using technology and AI to work smarter, and organising ourselves to serve customers better and grow sustainably. Group teams shape strategy, policy, brand, capital allocation and transformation, helping the whole organisation perform at its best.

We have a singular culture that unites all our people: we are customer-first challengers, who are committed, clear and connected. These behaviours unite us as one team to deliver for our colleagues, our customers, our stakeholders and the country. Joining BT Group means working at the heart of a business that matters to the UK, with the opportunity to shape decisions, influence outcomes and help set the future course of one of the country’s most important companies.

Apply now

Company benefits

25 (UK, increasing with service) / 21 (India) days annual leave + bank holidays
Adoption leave – 18 weeks full pay, 8 weeks half pay, 6 months statutory
Bank holiday swaps
Buy or sell annual leave – buy up to 5 days/year pro rata
Carer’s leave – Two weeks paid leave
Cinema discounts
Coaching
Compassionate leave
Complimentary Medical Services
Cycle to work scheme
Employee assistance programme
Employee discounts
Enhanced maternity leave – 18 weeks full pay, 8 weeks half pay, 6 months statutory
Enhanced paternity leave – 18 weeks full pay, 8 weeks half pay, 6 months statutory
Enhanced pension match/contribution
Enhanced sick pay – 3 months
Faith rooms
In house training
L&D budget – sponsored accreditation available for certain professions
Learning platform – internal and external learning content via Degreed
Learning license – unlimited access
Lunch and learns
Mental health platform access – Silvercloud
Mentoring
Neo-natal leave
Open to job sharing
Open to part time work for some roles
Optional unpaid leave
Private GP service – 24/7 virtual GP access for UK colleagues
Referral bonus
Returnship
Salary sacrifice
Share options
Shared parental leave
Travel loan
Volunteer days – 3 volunteer days per year
Reservist leave
Fertility treatment leave
Pregnancy loss leave
Pregnancy support
Fertility treatment leave
Pregnancy loss leave
Pregnancy support
On-site catering
On-site barista
On-site shower
Modern office
Collaboration spaces
Private booths
On-site wellness room
Open to part-time employees
Open to compressed hours

Working at BT Group

Company employees:

100,000 across BT Group (24,000 at BT Business)

Gender diversity (m:f):

74.3:25.7 (BT Group)

Hiring in countries

Brazil

Hungary

India

Malaysia

Singapore

United Kingdom

Office Locations

Awards & Accreditations

2nd - Best Workplace Culture

2nd - Best Workplace Culture

Flexa awards 2026
3rd – Most loved - Large companies

3rd – Most loved - Large companies

Flexa awards 2026
Most Family Friendly Company

Top 10 - Most Family Friendly Company

Flexa awards 2025
Best Career Progression

Top 10 - Best Career Progression

Flexa awards 2025

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