Top Java Developer Jobs in Kolkata

Develop and maintain Java and Spring Boot backend microservices for distributed billing and account management systems. Build GraphQL APIs, event-driven workflows, transactional data processes, and multi-datastore integrations. Deliver tested features through GitLab CI/CD, improve observability and resilience, and support safe production deployments. The role involves maintaining accurate billing accounts across MySQL, DynamoDB, MongoDB, and Zuora while ensuring reliability, consistency, and compliance.

Develop and maintain Java applications, RESTful services, and Angular frontends using Spring Boot and NgRx. Deploy applications to cloud platforms, practice TDD, manage CI/CD with Jenkins, and work with Oracle and PostgreSQL databases. Participate in agile processes, collaborate with cross-functional teams, mentor engineers, and independently lead technical initiatives and feature delivery.

Develop scalable full-stack applications using Java, React.js, Spring Boot microservices, Kafka, and AWS. Responsibilities include REST API development, cloud deployment, CI/CD, database integration, performance optimization, security, monitoring, logging, and production-ready code delivery. The role requires expertise in Java concurrency, event-driven architecture, Docker, Jenkins, Redis, observability tools, and SQL databases.

Design and evolve highly scalable backend systems for social products. Improve performance, availability, monitoring, alerting, incident response, data pipelines, and engineering productivity. Translate business requirements into reusable capabilities, plan long-term technical improvements, and collaborate cross-functionally. Participate in design and code reviews while applying AI-powered development tools securely and effectively.

Develop and maintain Java web applications using legacy J2EE and modern microservices architectures. Build reusable backend code and responsive interfaces with JSP, JavaScript, React, and related frameworks. Perform code reviews, unit testing, test automation, API development, and database integration. Lead high-performing onsite and offshore teams, support enterprise clients, communicate with stakeholders, and deliver end-to-end solutions using Agile practices.

Build and maintain Apache Camel routes and Spring Boot integration services connecting ERP, fulfillment, commerce, EDI, PLM, and data platforms. Own production troubleshooting across systems, including queues, retries, idempotency, and dead-letter handling. Deploy through Azure Kubernetes Service using Helm and related tooling, query PostgreSQL, review code, document fixes, and collaborate with India-based ERP and data teams. The role requires daily use of AI coding agents and reliable evening IST overlap with U.S. Mountain Time.

Develop a Java-based desktop IDE, coordination server, and relational data backend for a semiconductor test engineering DSL. Responsibilities include architecture, data modeling, versioning, synchronization, language editing and validation, debugging, automated testing, and platform quality. Collaborate with international engineering teams and domain experts to build a reliable, extensible development environment.

Develop a Java-based desktop IDE, coordination server, and relational data backend for a semiconductor test engineering DSL. Responsibilities include desktop UI development, data modeling, client-server synchronization, language editing and validation, architecture, debugging, automated testing, and platform quality. The role involves shaping a modular development environment and collaborating with international engineering teams and domain experts.

Design, implement, and maintain high-volume, low-latency Java applications. Participate across the development lifecycle, write testable code, perform analysis, testing, debugging, produce releases, and recommend architectural improvements.

Design, build, optimize, and operate scalable, low-latency backend services for an AI risk decisioning SaaS platform. Collaborate with product, frontend, and QA teams; implement testing and CI/CD practices; monitor service health; resolve performance bottlenecks; and mentor junior engineers.

Develop Android and Fire TV applications plus scalable Go or Java backend services for subscriptions, payments, in-app purchases, and entitlement workflows. Design REST APIs, microservices, distributed transaction processing, and resilient systems supporting millions of users and traffic spikes. Optimize performance, implement monitoring and observability, troubleshoot production issues, and collaborate across engineering and product teams.

Design and build scalable Java backend services for subscriptions, payments, entitlements, and Fire TV in-app purchases. Develop REST APIs, microservices, event-driven workflows, and reliable transaction-processing systems. Integrate payment providers and external platforms while ensuring idempotency, fault tolerance, consistency, and high performance. Improve observability, troubleshoot distributed production systems, and participate in architecture and code reviews.

Build and maintain scalable full-stack subscription, payment, and entitlement systems using Java and modern web technologies. Develop React-based user experiences, REST APIs, microservices, and Fire TV in-app purchase integrations. Design resilient distributed systems supporting high concurrency, reliability, observability, and traffic spikes. Integrate payment providers and platform APIs, improve performance, handle reconciliation and failure scenarios, participate in architecture and code reviews, and mentor engineers.

Build and maintain scalable full-stack subscription, payment, and entitlement systems using Java and modern web technologies. Develop React-based frontends, REST APIs, and microservices; integrate Fire TV in-app purchases, payment providers, app stores, and platform APIs. Improve performance, reliability, monitoring, and distributed-system consistency under high traffic. Collaborate across engineering and product teams, deliver production features independently, and participate in design and code reviews.

Design and build scalable Java and Spring Boot backend services for subscriptions, payments, entitlements, and Fire TV in-app purchases. Develop REST APIs, microservices, and event-driven workflows integrating payment providers and external platforms. Ensure high availability, fault tolerance, idempotent transaction processing, and performance during traffic spikes. Troubleshoot distributed production systems, improve observability, and participate in architecture and code reviews while mentoring engineers.

Develop and enhance scalable Java Spring Boot microservices and cloud-native supply chain and warehouse management applications on GCP. Responsibilities include designing SCM/WMS modules, integrating UI components, managing codebases and CI/CD pipelines, collaborating with product, UX, and QA teams, and ensuring production performance, security, and reliability. The role also involves agile ceremonies, code reviews, technical design, and supporting logistics workflows.

Develop and maintain high-throughput distributed services for Binance’s KYC platform. Responsibilities include translating business requirements into reliable Java services, writing tests and documentation, tuning performance, troubleshooting incidents, collaborating across engineering teams, and mentoring junior engineers. The role requires expertise in Java, Spring, MySQL, distributed system design, messaging middleware, and collaboration across global teams. KYC or compliance experience and JVM, SQL, or RPC performance-tuning experience are desirable.

Develop Java backend software using Core Java, object-oriented programming, Spring Boot, REST APIs, databases, Redis, JPA, Docker, and JUnit. Collaborate with IT teams to create high-quality software solutions, troubleshoot problems, and support reliable application development. The role requires Java up to version 17, database experience, strong analytical skills, and effective communication.

Develop scalable full-stack enterprise applications using Java, Spring Boot, microservices, REST APIs, and React or Angular. Design architectures, integrate databases and messaging systems, implement security, testing, CI/CD, Docker, Kubernetes, and cloud deployments. Apply agentic AI, LLM integrations, AI coding tools, prompt engineering, and tool calling to improve development workflows. Troubleshoot production issues, collaborate across technical teams, conduct code reviews, and mentor developers.

Develop and implement financial products such as wallets, payment gateways, cash rebates, merchant management, and compliance systems. Build open APIs, collaborate with product managers, tune performance, troubleshoot online incidents, refactor systems, and write clean, maintainable Java code using engineering best practices.

Build scalable enterprise applications using Java and Vue3. Develop RESTful APIs and maintainable frontend and backend code with Spring Boot, TypeScript, HTML5, CSS3, and MySQL. Apply Spring Security, JPA, JWT, design patterns, and enterprise architecture principles. Collaborate within Agile Scrum processes, follow SDLC practices, and deliver clean, testable software while solving technical problems effectively.

Design, build, and operate Java backend services, REST APIs, compliance capabilities, and analytics products. Develop blockchain data pipelines, model relational and NoSQL data, optimize queries, and improve production reliability, observability, and performance. Translate regulatory requirements into technical solutions while collaborating with compliance and product specialists. The role may also involve AWS infrastructure, Kafka, crypto integrations, and AI-assisted development tools.

Designs and develops content governance platforms, anti-abuse tools, rule engines, and scalable governance pipelines. Integrates recommendation systems, implements content takedown policies, and builds capabilities for content review, risk detection, policy enforcement, and effectiveness analysis. The role addresses spam, fraud, traffic diversion, low-quality content, and black- or gray-market activity while collaborating with product, operations, algorithm, and business teams.

Develop and maintain fintech applications using Java and Spring Boot. Design secure RESTful APIs for financial transactions, translate financial workflows into technical solutions, ensure PCI DSS and GDPR compliance, and optimize high-volume, low-latency systems. Participate in Agile ceremonies, code reviews, CI/CD, Docker, cloud, and DevOps practices while collaborating with product managers, analysts, business units, leaders, associates, and clients.

Develop secure, high-performance financial transaction systems using Java, Spring Boot, microservices, React.js, and RESTful APIs. Build and integrate financial APIs using OAuth2 and JWT, ensure PCI DSS and GDPR compliance, optimize high-volume low-latency applications, and collaborate with product teams. Participate in Agile practices, code reviews, and DevOps activities while delivering technical solutions across business and product stakeholders.