Software Engineering Specialist

Req ID: 59489

Job Function: Software Engineering

Posting Start Date: 02/07/2026

Posting End Date: 05/07/2026

Division: Networks

Job Location: GBR-Manchester-New Bailey

Advertised Salary: Competitive + Benefits

About the role

We are driving the modernisation of Core Voice Network platforms, transforming legacy telephony systems into scalable, cloud-native, microservices-based architectures while also enabling next-generation Voice AI capabilities such as intelligent call handling, automation, and conversational services.

This role sits within a Software Engineering Development team focused on designing, developing, and evolving distributed applications that underpin call services and routing across BT’s fixed voice estate. You will play a key role in building and shaping microservice architectures, leveraging technologies such as Java, Spring Boot, Podman, and Kubernetes, and contributing to system design for high availability, scalability, and real-time processing. Working closely with cross-functional teams, you will help deliver robust, production-grade solutions, mentor engineers, and continuously improve development practices.

This role is based at New Bailey, Manchester, UK with a hybrid working model of 3 days together, 2 days wherever.

What you’ll be doing

Design, develop, and maintain scalable microservices-based applications using Java, Spring Boot, and containerisation technologies (Docker, Kubernetes)

Define and implement RESTful APIs aligned to OpenAPI (Swagger) standards to support digital and distributed systems

Lead by example through hands-on development, while reviewing code and mentoring engineers to ensure high-quality delivery

Adopt an AI-first engineering approach, leveraging AI tools and Voice AI capabilities to accelerate development, improve code quality, and enable intelligent call handling solutions

Collaborate with architects, product teams, analysts, and engineers to deliver solutions across component and end-to-end system levels

Contribute to system design and architecture, ensuring scalability, resilience, and performance for real-time, high-throughput platforms

Solve complex technical issues, performing coding, debugging, testing, and troubleshooting across the application stack

Conduct deep-dive analysis to identify bottlenecks, optimise performance, and reduce technical debt through continuous improvement

Contribute to and help shape the technical roadmap, aligning engineering deliverables with business objectives and innovation trends

Champion best practices and continuously share knowledge on emerging technologies, including AI-driven development approaches

Exposure to Core Voice platform development (e.g., OCCAS) including working with telecom protocols and tools such as SIP signalling, RTP media flows, traffic simulation (SIPP), and troubleshooting using tools like Wireshark is desirable but not mandatory

Essential Skills / Experience

Strong experience in Java development with good working knowledge of Spring Boot, along with experience in designing and building production-ready APIs using OpenAPI (Swagger)
Good understanding of microservices architecture patterns, distributed system design, and experience working with relational databases (such as MYSQL/Timesten) for scalable solutions
Understanding of container technologies such as Docker, comfort working in Linux environments with basic Bash scripting, along with working knowledge in AI concepts and frameworks within software development

Desirable Skills / Experience

Experience using Git for version control. Awareness of continuous integration and delivery (CI/CD) practices
Familiarity with tools like Consul and Prometheus for service discovery and monitoring
Strong foundational knowledge of Container as a Service, including its key components and how it supports scalable applications
Experience working in Agile teams, using tools such as Jira and Scrum practices
Familiarity with cloud platforms (such as AWS, Azure, or OpenStack) and virtualised environments
Experience working with telecom or voice systems
Exposure to Core Voice platform development (e.g., OCCAS), including working with protocols and tools such as SIP signalling, RTP media flows, traffic simulation using SIPP, and troubleshooting with tools like Wireshark

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.

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