Java Developer – Protocol Integration & Secure Messaging

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