Senior Java Backend Developer

BT Group; Bengaluru; On-site; INR 2,400,000 - 3,600,000; Full time

Job summary

BT Group in Bengaluru (Networks division, Martini team) is seeking a Software Engineering Specialist to design and build backend services in Java, apply multichannel architecture, data modelling and integration patterns.

You will own CI/CD pipelines, mentor developers, work with SQL Server, Oracle, MySQL, ClickHouse and caches like Redis, Memcached, Varnish, and drive proactive fault detection to reduce outages.

Qualifications

• 8+ years of hands-on Java backend development.
• Strong understanding of multichannel architecture, data modelling, data exchange, and system integrations.
• Experience with relational databases and caching technologies listed.
• Ability to provide accurate development estimates from high-level requirements.
• Experience performing root cause analysis and resolving production issues.

Responsibilities

• Design and build backend services using Java, applying multichannel architecture, data modelling, and integration patterns.
• Provide accurate development estimates based on high-level business and technical requirements.
• Maintain clear and regular communication with stakeholders and customers throughout each project.
• Work with databases including SQL Server, Oracle, MySQL, and ClickHouse, and caching technologies like Redis, Memcached, and Varnish.
• Perform root cause analysis on production issues and drive timely resolution.
• Build tools and automation to reduce recurring errors and improve the experience for Network Operations users.
• Lead and mentor backend developers through code reviews, pair programming, and setting engineering standards.
• Shape system architecture when needed, ensuring solutions are scalable and maintainable.
• Own and improve CI/CD pipelines and deployment processes to enable fast, reliable releases.

Skills

Java backend development

Multichannel architecture

Data modelling

Data exchange

System integrations

CI/CD pipelines

Communication skills

Agile teams

Tools

SQL Server

Oracle

MySQL

Redis

Memcached

Varnish

ClickHouse

Kubernetes

Kafka

Job description

Software Engineering Specialist Job Req ID: Posting Date: Function: Location: Salary:

About the role Based in BT's Networks division within the Martini team, which delivers network performance monitoring and fault detection capabilities. Directly impacts BT's network reliability by enabling Network Operations teams to detect and resolve faults faster, reducing customer-impacting outages. Supports BT's operational excellence strategy by driving proactive network management and improving mean time to detect/repair.

What you’ll be doing

• Design and build backend services using Java, applying multichannel architecture, data modelling, and integration patterns.
• Provide accurate development estimates based on high-level business and technical requirements.
• Maintain clear and regular communication with stakeholders and customers throughout each project.
• Work with databases including SQL Server, Oracle, MySQL, and ClickHouse, as well as caching technologies like Redis, Memcached, and Varnish.
• Perform root cause analysis on production issues and drive timely resolution.
• Build tools and automation to reduce recurring errors and improve the experience for Network Operations users.
• Lead and mentor backend developers through code reviews, pair programming, and setting engineering standards.
• Shape system architecture when needed, ensuring solutions are scalable and maintainable.
• Own and improve CI/CD pipelines and deployment processes to enable fast, reliable releases.

Essential Skills / Experience

• 8+ years of hands‑on experience in Java backend development.
• Strong understanding of multichannel architecture, data modelling, data exchange, and system integrations.
• Working knowledge of relational databases (SQL Server, Oracle, or MySQL) and caching technologies (Redis, Memcached, or Varnish).
• Experience with ClickHouse or similar columnar databases.
• Ability to provide accurate development estimates from high-level requirements.
• Experience performing root cause analysis and resolving production issues.
• Comfortable leading and mentoring developers through code reviews and engineering best practices.
• Familiarity with CI/CD pipelines and deployment automation.
• Strong communication skills — able to keep stakeholders informed clearly and regularly.
• Experience working in agile teams.

Desirable Skills / Experience

• Experience with containerisation using Kubernetes.
• Experience with messaging systems such as Kafka.
• Experience in the telecoms or network operations domain.
• Exposure to network performance monitoring or fault detection systems.

Our Package

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.

Experience Level Mid Level