Sr Java Full Stack Developer

Overview

Job Title: Sr Java Full Stack DeveloperLocation: Austin, TX

Job Type: Independent Contract (Contractor / Non-Employee)Start Date: 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.

• Java 8+ 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.