Java Backend Developer - Microservices & Cloud

BT Group; Bengaluru; On-site; INR 1,800,000 - 3,000,000; Full time

Job summary

BT Group in Bengaluru is seeking a Software Engineering Professional to design, develop, and maintain backend services and APIs using Java 8/17/21. You will build and manage microservices with Spring Boot, write clean, efficient code, and work across SQL and NoSQL databases.

The role focuses on performance, scalability, and reliability, with strong emphasis on CI/CD and collaboration with cross-functional teams.

Qualifications

• 4–9 years of hands-on Java backend development experience.
• Strong expertise in Java 8/11/17/21, including Streams and concurrency.
• Proven experience with Spring Boot and microservices architecture.
• Solid understanding of Hibernate/JPA and ORM concepts.
• Experience with RESTful APIs and API security.
• Working knowledge of SQL and NoSQL databases.
• Familiarity with Git, Maven/Gradle, and CI/CD tools.
• Understanding of application performance tuning and JVM concepts.
• Strong problem-solving and analytical skills.

Responsibilities

• Design, develop, and maintain backend services and APIs using Java 8/17/21.
• Build and manage microservices using Spring Boot and related frameworks.
• Implement clean, efficient, and reusable code following best practices.
• Develop data access layers using Hibernate/JPA.
• Use Java Streams and functional programming concepts.
• Work with SQL databases (MySQL, PostgreSQL, Oracle) and NoSQL databases (MongoDB, Cassandra).
• Optimize application performance, scalability, and reliability.
• Implement unit and integration tests and support CI/CD pipelines.
• Collaborate with architects, DevOps, QA, and product teams.
• Participate in code reviews and contribute to design discussions.
• Troubleshoot production issues and support root cause analysis.

Skills

Java backend

Java versions

Spring Boot

Hibernate / JPA

RESTful APIs

SQL & NoSQL

Git

Maven/Gradle

CI/CD tools

JVM tuning

Tools

Git

Maven/Gradle

CI/CD tools

Job description

Software Engineering Professional Job Req ID: 64117 Posting Date: 15-Nov-2026 Function: Software Engineering Location: Bengaluru Salary: Competitive

About the role

• Specific business area:
  • Revenue growth, customer experience, differentiation
  • Business continuity, operational backbone
  • Cost optimization, operational stability
  • Data-driven decision making
  • Scalability, resilience, efficiency
  • Risk mitigation, regulatory compliance
  • Cross-system connectivity and business agility
• Impact of the role:
  • 1. Business & Customer Impact- Translates business requirements into reliable digital solutions, directly enabling revenue generation, customer experience, and service differentiation. Improves time-to-market by delivering scalable, reusable, and automation-friendly solutions. Enhances customer satisfaction through performant, secure, and resilient applications.
  • 2. Operational Stability & Efficiency- Builds systems that reduce manual effort, defects, and operational incidents. Improves system reliability and availability through well-designed architectures and proactive defect prevention. Supports incident reduction and faster recovery by writing maintainable and observable code.
  • 3. Scalability & Long-Term Sustainability- Designs applications that scale with business growth using modular, microservices-based approaches. Controls technical debt by following clean code, design patterns, and coding standards. Ensures systems are adaptable to future requirements, regulatory needs, and technology upgrades.
• Link to strategy:
  1. Core Technical Foundation (Must-Have) -Be strong in fundamentals that never change. Focus Areas:
     • Data Structures & Algorithms
     • Object-Oriented Design & SOLID principles
     • Design Patterns
     • Clean Code & Refactoring
  2. Programming Language Mastery (Java-Focused) - Go deep rather than wide. Focus Areas:
     • Java 8/11/17/21 features
     • Streams, Lambdas, Concurrency
     • JVM internals & performance
  3. Backend & Microservices Architecture - Build scalable, production-ready systems. Focus Areas:
     • Spring Boot, Spring Cloud RESTful APIs
     • Microservices design patterns
     • Resilience, Circuit Breakers
  4. Database & Data Strategy - the right data store and model efficiently. Focus Areas:
     • SQL (Postgres, MySQL)
     • NoSQL (MongoDB, Cassandra)
     • Transactions, Indexing, Performance
  5. DevOps & Cloud Readiness - Develop with deployment and scalability in mind. Focus Areas:
     • Docker & Kubernetes
     • CI/CD pipelines
     • Cloud basics (AWS/Azure/GCP)
  6. Engineering Excellence & Quality - Write code that is reliable, testable, and secure. Focus Areas:
     • Unit & Integration Testing
     • Code reviews
     • Observability (logs, metrics, tracing)
  7. Career Progression Strategy Goal: Move from Developer → Senior → Tech Lead / Architect.
• What you’ll be doing:
  • Design, develop, and maintain backend services and APIs using Java 8/17/21.
  • Build and manage microservices using Spring Boot and related frameworks.
  • Implement clean, efficient, and reusable code following best practices.
  • Develop data access layers using Hibernate / JPA.
  • Make effective use of Java Streams, lambda expressions, and functional programming concepts.
  • Work with SQL databases (e.g., MySQL, PostgreSQL, Oracle) and NoSQL databases (e.g., MongoDB, Cassandra).
  • Optimize application performance, scalability, and reliability.
  • Implement unit and integration tests and support CI/CD pipelines.
  • Collaborate with architects, DevOps, QA, and product teams.
  • Participate in code reviews and contribute to design discussions.
  • Troubleshoot production issues and support root cause analysis.
• Essential Skills / Experience:
  • 4–9 years of hands‑on experience in Java backend development.
  • Strong expertise in Java 8 / 17 / 21, including Streams and concurrency concepts.
  • Proven experience in Spring Boot and microservices architecture.
  • Solid understanding of Hibernate / JPA and ORM concepts.
  • Experience with RESTful APIs and API security.
  • Working knowledge of SQL and NoSQL databases.
  • Familiarity with Git, Maven/Gradle, and CI/CD tools.
  • Understanding of application performance tuning and JVM concepts.
  • Strong problem‑solving and analytical skills.
• Desirable Skills / Experience:
  • Work with SQL databases (e.g., MySQL, PostgreSQL, Oracle) and NoSQL databases (e.g., MongoDB, Cassandra).
  • Optimize application performance, scalability, and reliability.
  • Implement unit and integration tests and support CI/CD pipelines.
  • Collaborate with architects, DevOps, QA, and product teams.
  • Participate in code reviews and contribute to design discussions.
  • Troubleshoot production issues and support root cause analysis.
• 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.