Java Back End Developer

Seeking a Full Stack Developer with strong backend and systems-level development experience to support enterprise applications, API development, and cloud-based solutions. The role focuses on building scalable services, integrating payment systems, and working within AWS environments.

Key Responsibilities:

• Develop and maintain backend services and APIs using JAVA within Windows Server environments
• Design and optimize database solutions using Oracle DB and PL/SQL
• Build and support cloud-based applications leveraging AWS (EC2, RDS, S3)
• Implement and maintain secure, high-performance integrations (including payment gateways such as TSYS and Financial/EMV)
• Develop Windows Services and background job processing components
• Support multi-tenant application architectures and distributed systems
• Work on low-level networking solutions including TCP/IP socket programming
• Collaborate with cross-functional teams to modernize legacy .NET systems
• Implement secure file transfer and encryption integrations (SFTP, RSA certificates)
• Contribute to system scalability, performance tuning, and reliability improvements

Required Skills:

• Strong experience with C#/.NET development
• Expertise in Oracle DB and PL/SQL
• Experience building Windows Server-based APIs
• Hands-on experience with AWS services (EC2, RDS, S3)

Preferred Qualifications:

• Experience with Windows Services and asynchronous/background processing
• Knowledge of payment processing systems and POS/payment integrations
• Familiarity with multi-tenant architecture design
• Experience with TCP/IP socket programming

Nice to Have:

• Experience with SFTP and RSA-based integrations
• Exposure to legacy application modernization (especially .NET)
• Awareness of AI/ML integration strategies