Job description

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

Requirements

Must-haves

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
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)

Nice-to-haves

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

Application prep

Use the role’s language and application details while tailoring your materials.

Keywords to mirror

apiawsjavasqlaiml

Platform: jobdiva
Effort: medium