Design Engineer Professional

BT Group; Bengaluru; On-site; INR 2,500,000 - 4,000,000; Full time

Job summary

BT Group is hiring for a senior Java engineer to develop and support software for its digital and telecom services in Bangalore. You will work with cross-functional teams to deliver reliable, secure technology solutions, and participate in an agile environment to improve network operations.

The role emphasizes microservices, REST, Kafka, and distributed systems, with strong focus on performance, observability, and mentoring teammates.

Qualifications

• Expertise in Java 17/21 and Spring Boot.
• Experience designing microservices architectures.
• Strong REST and messaging patterns knowledge.
• Hands-on Kafka (Producers/Consumers/Groups).
• Experience with Event-Driven architecture patterns (Saga, Outbox).
• SQL databases (PostgreSQL/MySQL) and NoSQL databases (MongoDB/Cassandra/Redis/Elasticsearch).
• Distributed systems concepts: ACID, CAP, Sharding, Replication.
• Database performance tuning and data modeling.
• Java concurrency, multithreading, CompletableFuture, and Virtual Threads.
• Containerization with Docker and Kubernetes; CI/CD pipelines.
• Observability with Grafana/Prometheus/OpenTelemetry/ELK.

Responsibilities

• Develop and support software solutions for BT Group’s digital and telecom services.
• Collaborate with cross-functional teams to deliver reliable, secure tech solutions.
• Work in an agile engineering environment to continuously improve network operations.
• Contribute to design, code reviews, and mentoring of teammates.

Skills

Java concurrency

Microservices

REST & async messaging

Kafka

Event-Driven Architecture

SQL databases

NoSQL databases

Distributed systems

Docker & Kubernetes

CI/CD & DevOps

Observability tools

Agile/Scrum

Mentoring/communication

Tools

Spring Boot

PostgreSQL/MySQL

Elasticsearch/Redis

Job description

Location: Bangalore

Salary: Competitive

About the role

Business Area: Work within BT Group's telecom technology and digital engineering teams to build and support applications, platforms, and network solutions.

Impact: Help develop software that improves customer experience, network reliability, and operational efficiency.

Strategic Contribution: Support BT's digital transformation journey through innovation, automation, and modern software development practices.

What you’ll be doing

Develop and support software solutions that enhance BT Group's digital and telecom services. Collaborate with cross-functional teams to deliver reliable, secure, and customer-focused technology solutions.

Learn, contribute, and grow within an agile engineering environment while helping improve network operations

Essential Skills / Experience

• Strong expertise in Java 17 and/or Java 21.
• Proven experience in designing and developing Microservices-based architectures using Spring Boot.
• Strong understanding of inter-service communication patterns using REST and asynchronous messaging.
• Hands-on experience with Apache Kafka, including Producers, Consumers, Consumer Groups, Partitioning, Replication, and Message Delivery Guarantees.
• Experience building Event-Driven Architectures and implementing patterns such as Saga, Outbox, Circuit Breaker, Retry, and Bulkhead.
• Strong knowledge of SQL databases such as PostgreSQL, MySQL.
• Experience with NoSQL databases such as MongoDB, Cassandra, Redis, or Elasticsearch.
• Solid understanding of ACID, CAP Theorem, Sharding, Replication, and Distributed Systems concepts.
• Experience optimizing database performance, query tuning, indexing, and data modelling.
• Strong knowledge of Java concurrency, multithreading, Completable Future, and Virtual Threads.
• Experience with containerization technologies such as Docker and Kubernetes.
• Familiarity with CI/CD pipelines, Git, Maven/Gradle, and DevOps practices.
• Experience with monitoring and observability tools such as Grafana, Prometheus, Open Telemetry, or ELK Stack.
• Strong problem-solving skills with experience in production support, troubleshooting, and root cause analysis.
• Experience working in Agile/Scrum development environments.
• Excellent communication, stakeholder management, and mentoring skills.

Desirable Skills / Experience

• Java with Spring boot
• NoSQL and SQL Database knowledge
• Native app deployment using Jenkins, Docker, Kubernetes
• Kafka

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.