Contractor Senior Java Developer

Senior Java Developer

Job Description

At TechBiz Global, we are seeking a Senior Java Developer to join one of our client's teams. 6-month contract with possible extension. This is an exciting opportunity to grow in an innovative environment.

• Java Development: Design, develop, test, and maintain scalable Java-based backend applications. Write clean, efficient, and well-documented code using Java 11+ and Spring Boot. Design and implement RESTful APIs and microservices architectures. Optimize performance and ensure high availability of backend components. Conduct code reviews, unit testing, and integration testing. Troubleshoot complex technical issues.
• Cloud & Infrastructure (AWS): Participate in AWS infrastructure optimization and implementation: Centralized monitoring via CloudWatch alarms, Multi-account structure setup, Security hardening (IAM policies, SSM Secure Strings), Deployment pipelines using AWS CDK and Infrastructure as Code (IaC), Cost-efficiency strategies including Aurora Serverless, rightsizing, and savings plans. Work closely with DevOps/Cloud teams for smooth CI/CD processes.
• Team Collaboration & Coordination: Coordinate and communicate regularly with German-speaking stakeholders (C1 German required). Collaborate with offshore team members in Vietnam (English B2+ required). Take initiative in planning, prioritizing, and delegating development tasks. Provide technical mentorship to junior developers.

Requirements

• 8+ years of commercial experience with Java
• Strong expertise with Spring/Spring Boot, JPA/Hibernate, REST APIs
• Solid background in cloud-native development with AWS
• Experience with CI/CD, Git, and modern DevOps workflows
• German - C1 level (mandatory)
• English - B2 level
• Strong communication, organizational, and team leadership skills
• Experience working in agile/Scrum environments

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