Senior Backend Java Developer

Senior Backend Java Developer Role

Onsite in McLean, VA/In-Person Interview Required

12 months+ contract

w2, 1099 or ctc

10+ years' experience Required

We are seeking an experienced Senior Java Backend Developer with a strong background in Java (Java 8+) , Spring Framework , enterprise backend development , messaging systems , and Linux environments .

• The ideal candidate should have 10+ years of experience in backend engineering and a solid understanding of enterprise-level architecture, security, and performance tuning.
• This role requires both deep technical expertise and the ability to collaborate in Agile teams, mentor junior developers, and contribute to scalable and secure solutions.

Key Responsibilities:

Backend Development:

• Design, develop, and maintain robust backend systems using Java 8+ , Spring Boot , and Java EE/Jakarta EE .
• Develop RESTful APIs using Spring Boot and optionally JAX-RS .
• Implement API documentation using Swagger/OpenAPI .
• Ensure secure, maintainable, and scalable code using best practices and design patterns.

Web & Data Communication:

• Deep understanding of , JSON , XML , and WebSockets .
• Implement authentication and authorization using Spring Security , JWT , and OAuth2 .
• Apply secure coding practices and input validation techniques.

Database Expertise:

• Strong experience with RDBMS : Oracle , PostgreSQL , MySQL , SQL Server .
• Skilled in writing complex SQL , stored procedures, indexing, and performance tuning.
• Experience with ORMs : Hibernate , JPA .
• Basic understanding of NoSQL databases like Cassandra (as needed).

Messaging and Asynchronous Processing:

• Solid experience with Java Messaging Service (JMS) and messaging tools such as ActiveMQ , RabbitMQ , IBM MQ , or Apache Kafka .
• Understand and implement Pub/Sub , Point-to-Point , and Event-Driven Architecture patterns.
• Handle error recovery, retries, and dead-letter queues effectively.

PKI & Security Infrastructure:

• Experience with PKI infrastructure : public/private key management, keystores (.p12), keytool/OpenSSL, encryption/decryption, sign/verify using asymmetric/symmetric cryptography.

DevOps & CI/CD:

• Build and manage projects using Maven or Gradle .
• Integrate and deploy using CI/CD tools : Jenkins , Bitbucket Pipelines , etc.
• Scripting experience in Python , Shell , and tools like Ansible .

Linux & System Integration:

• Professional experience with Red Hat Linux or similar distributions.
• Comfortable with Linux command-line tools, file systems, and process management.

Team Collaboration & Soft Skills:

• Work effectively in Agile/Scrum teams.
• Proficient with Git for version control.
• Review code, provide mentorship, and support best practices within the team.
• Strong documentation and communication skills .
• Analytical mindset with strong problem-solving skills .