Sr Java Full Stack Developer

Overview JobTitle: Sr Java Full Stack Developer Location: Austin, TX Job Type: Independent Contract (Contractor / Non-Employee) StartDate: ASAP Pay Rate: $60-70/hr 1099 / C2C Contract Length: 4 years We are looking for a Senior Java Full Stack Developer with strong experience in designing, developing, deploying, and troubleshooting enterprise applications. The ideal candidate should have hands‑on expertise in Java, Spring Boot, React, AWS, databases, CI/CD, microservices, and system/solution design. The candidate should be comfortable working at both the application development and architecture/design levels, with strong problem‑solving and debugging skills in production environments. Responsibilities Key Responsibilities Design, develop, and maintain scalable applications using Java and Spring Boot. Develop responsive front‑end applications using React and JavaScript. Design and implement RESTful APIs and microservices. Work with AWS services including S3, Lambda, EKS, ECS, and EC2. Develop and maintain infrastructure using Terraform, Ansible, and CloudFormation. Implement and manage CI/CD pipelines using Jenkins and GitHub Actions. Work with relational databases such as MySQL and Oracle. Work with NoSQL databases such as MongoDB and Cassandra. Participate in application, system, and solution architecture discussions. Design solutions that are scalable, reliable, secure, and production‑ready. Troubleshoot application, deployment, performance, and production issues. Collaborate with engineering, DevOps, QA, and product teams. Core Competencies 1. Basic System Design The candidate should be able to: Create a simple architecture diagram for one of their productionized projects. Explain the major components and how they interact. Explain why specific technologies/components were selected. Describe frontend‑to‑backend communication, databases, APIs, messaging, deployment, and infrastructure. Discuss basic scalability, availability, security, and performance considerations. 2. Debugging & Production Troubleshooting The candidate should demonstrate strong troubleshooting skills through real‑world scenarios such as: EKS/ECS deployment failure. Application not starting after deployment. Production performance degradation. High CPU/memory utilization. API latency or timeout issues. Database connectivity/performance problems. Service‑to‑service communication failures. 3. Java / Microservices Design Patterns Candidate should have a strong understanding of commonly used Java and Microservices design patterns. They should be able to explain: The problem statement addressed by the pattern. Detailed internal working of the pattern. Advantages and limitations. When and when not to use it. A real‑world implementation example. 4. Solution Design Given a business or technical problem statement, the candidate should be able to: Understand and clarify requirements. Identify major system components. Propose a high‑level solution architecture. Select appropriate technologies. Explain data flow and component interactions. Consider scalability, reliability, security, performance, and maintainability. 5. Java, Spring Boot & Coding The candidate should demonstrate strong hands‑on knowledge of: Core Java and recent Java versions. Object‑oriented programming. Collections, Streams, Lambda expressions, and exception handling. Multithreading/concurrency. Java8+ features. Spring Boot. REST APIs. Dependency Injection. Spring Security and configuration. Microservices development. Unit/integration testing. Writing clean, maintainable, production‑quality code. The candidate will also be evaluated through a Java/Spring Boot coding problem. Qualifications Required Technical Skills Skill Minimum Rating Minimum Experience Senior Developer — 10+ Years Java – Recent Versions 8/10 8+ Years Spring Boot 8/10 5+ Years React / Front-End Technologies 6/10 2+ Years JavaScript 6/10 2+ Years AWS – S3, Lambda, EKS, ECS, EC2 7/10 2+ Years Infrastructure as Code – Terraform, Ansible, CloudFormation 6/10 1+ Years CI/CD – Jenkins, GitHub Actions 5/10 2+ Years RDBMS – MySQL, Oracle 8/10 8+ Years NoSQL – MongoDB, Cassandra 7/10 1+ Years System-Level Design / Frontend‑to‑Backend Architecture 7/10 3+ Years Application Design 7/10 3+ Years Architecture Understanding 7/10 3+ Years Pay Range USD $60.00 - USD $70.00 /Hr. #J-18808-Ljbffr