2 Javamail Jobs

Role Overview We are looking for a Java developer with strong fundamentals to work on OpenAS2 , an open-source protocol server used for secure, reliable file transfer over the internet. You will be responsible for understanding the codebase, configuring its components, and implementing enhancements around messaging, encryption, and protocol workflows. Prior experience with AS2 or file transfer systems is not mandatory — we value deep curiosity and the ability to work with well-structured open-source systems. Responsibilities Clone, build, and run the OpenAS2 open-source Java project (Maven-based). Modify and extend protocol behavior around message handling, validation, and error recovery. Configure file-based settings such as system routing, partner setup, and certificate handling. Implement enhancements or custom modules for system reliability, monitoring, and alerting. Collaborate with internal teams to deploy and support the gateway in staging/production. Troubleshoot edge cases like transmission failures, signature mismatches, and response codes. Work with X.509 certificates and Java Keystores (JKS), including importing/exporting keys. Technical Skills Required Must Have: Strong core Java experience (Java 8+; ideally Java 11 or above) Maven, Git, and standard Java project structure familiarity Solid understanding of file I/O, multi-threading, and exception handling Comfortable reading and navigating large open-source codebases Basic knowledge of cryptography (signing, encryption, hashing) Understanding of HTTP , HTTPS , and client-server communication (request/response lifecycle) Familiar with concepts like content-type , MIME boundaries , and headers Nice to Have: Worked with or explored any protocol-based open-source project Experience handling Java keystores (JKS) and SSL/TLS configuration Familiarity with BouncyCastle or JavaMail libraries Comfortable with basic Linux CLI for deploying Java apps Familiarity with logging frameworks (Log4j, SLF4J) Bonus Skills (Not Mandatory) Exposure to open-source message transfer tools (AS2, FTP, SFTP, MQ) Experience with test automation or scripting integrations around backend services Understanding of structured data formats like XML, JSON, or custom text-based protocols Why Join Us? Work directly with real-world protocol-level systems Build internal tools and automation on top of a modern, maintained open-source stack Learn and contribute without needing legacy business-specific domain knowledge Gain hands-on experience with secure messaging, encryption, and file-based backend systems How to Apply: Interested candidates can send their resume to hr@kistechnology.org o*r reach out via call at 87070 73436.* Job Type: Full-time Work Location: In person Speak with the employer +91 8707073436

Position: Senior Java Developer Experience: 2-5 Years Employment Type: Full-time Key Responsibilities: Design, develop, and maintain scalable, high-performance Java-based applications. Write clean, efficient, and reusable code following best practices. Collaborate with cross-functional teams to gather and analyze requirements and deliver end-to-end solutions. Work on APIs, microservices, and system integrations for seamless communication between applications. Optimize application performance, scalability, and reliability. Lead troubleshooting and debugging efforts to resolve production issues and improve system stability. Contribute to system architecture and design discussions to enhance application performance and maintainability. Mentor junior developers and conduct code reviews to ensure high code quality and adherence to standards. Requirements Experience: 2-5 years of experience in Java development (internship experience excluded). Java Development: Advanced Java concepts: Multithreading and Concurrency (e.g., ExecutorService, CompletableFuture). Java Memory Model (JMM) and Garbage Collection tuning. Streams API and Functional Programming. Reflection API and Dynamic Proxies. Java Modules (JPMS) . Enterprise Java : Working with JEE components (Servlets, JSPs, EJBs). Java Messaging Service (JMS) . JavaMail API integration. Java Security : Secure coding practices. Implementation of JWT and OAuth for authentication/authorization. SSL/TLS and certificate handling in Java. Testing : Writing unit tests using JUnit and integration tests with Mockito . Performance testing tools like JMeter . Architecture Design: Design Patterns : Singleton, Factory, Builder, Strategy, Observer, etc. Advanced patterns like CQRS and Event Sourcing. Microservices Architecture : API Gateway design (e.g., Zuul, Spring Cloud Gateway). Inter-service communication with gRPC and REST APIs . Distributed transactions using Saga and Eventual Consistency. Enterprise Application Architecture : Monolithic to Microservices Migration . Layered and Hexagonal Architecture. Application scaling and load balancing strategies. Domain-Driven Design (DDD) : Aggregate root, bounded context, and entities modeling. Integration Patterns : Message Queue Integration (e.g., RabbitMQ, Kafka). File-based processing and FTP integration. Apache Tomcat Expertise: Tomcat Configuration : Customizing server.xml and web.xml. Thread pool and connector configurations for performance tuning. Deployment and Monitoring : WAR and EAR deployments in Tomcat. Performance monitoring using tools like VisualVM and JConsole . Session Management : Sticky sessions and session replication across clusters. Security : Securing Tomcat with SSL certificates. Enabling role-based access and JNDI Realm configuration. Logging and Troubleshooting : Configuring and customizing logging with Log4j or SLF4J . Debugging slow performance or crashes with thread dumps. BeanShell: Introduction to BeanShell : Using BeanShell for dynamic scripting in Java applications. Embedding BeanShell in enterprise applications. Scripting with BeanShell : Running Java code snippets dynamically at runtime. Prototyping and testing Java logic using BeanShell. Integration : Integrating BeanShell with Java servlets and applications. Using BeanShell for configuration scripting in middleware or plugins. Custom Automation : Automating admin tasks in web servers or enterprise systems with BeanShell. Performance Optimization: JVM Optimization: Tuning JVM options (-Xms, -Xmx, -XX flags). Identifying and resolving memory leaks using Java Flight Recorder (JFR) . Database Performance: Query optimization with Hibernate/JPA. Connection pooling configuration using HikariCP . Code Profiling: Profiling tools like YourKit , VisualVM , and JProfiler . Job Type: Full-time Pay: ₹1,207,623.23 - ₹2,098,305.47 per year Benefits: Flexible schedule Health insurance Provident Fund Location Type: In-person Schedule: Day shift Fixed shift Experience: Java: 4 years (Required) Java Spring Boot: 4 years (Required) Work Location: In person