Senior AWS Java Full Stack Developer

Job Title: Senior AWS Java Full Stack Developer
Location: Knoxville, TN
Type: Permanent Full Time
Work Model: Hybrid – onsite and remote

Responsibilities
• Lead the development and support of cloud-based applications in an AWS-focused financial services environment.
• Make component level technical decisions, build secure and scalable services, and improve application performance and reliability.
• Guide implementation teams, strengthen automated testing and delivery practices, resolve complex issues across services, and mentor developers.
• Evaluate technical tradeoffs, document implementation decisions, and align solutions with enterprise standards.

Requirements
• 8+ years of advanced Java experience, including collections, streams, exception handling, JVM concepts, multithreading, concurrency, and functional and reactive programming.
• Familiarity with Java 8, 17, and 21 features.
• Strong Spring Boot and microservices experience, including REST APIs, dependency injection, input validation, centralized exception handling, configuration management, and Actuator.
• Hands-on experience with Spring Security, JWT authentication, JPA/Hibernate, and transaction management.
• Ability to define service boundaries and implement resilient, scalable services using circuit breakers, distributed transaction patterns, and production monitoring.
• Strong Angular skills, including component structure, services, RxJS, state management, routing, API integration, and UI performance optimization.
• Hands-on AWS experience with EC2, S3, RDS, Lambda, API Gateway, SNS, SQS, IAM, ECS, Auto Scaling, CloudWatch, and networking fundamentals.
• Experience implementing serverless and event-driven applications with attention to availability, security, operational readiness, and cloud costs.
• Ability to lead component and service implementation, evaluate technical tradeoffs, document decisions, and mentor other developers.

Desired Skillset:
• Kafka producers and consumers, topics, consumer groups, event streaming, error handling, and performance tuning.
• Docker and Kubernetes, including container optimization, deployments, scaling, and troubleshooting.
• Git, GitHub Actions, Jenkins or Azure DevOps, build automation, CI/CD pipelines, and release practices.
• API standards, Open API/Swagger, authentication, authorization, versioning, and API contracts.
• Playwright and Lambda Test for UI automation, regression testing, cross browser execution, and troubleshooting unreliable tests.
• GitHub Copilot or similar tools, including team guidance on generated code review, test coverage, and security.
• Strong root cause analysis, stakeholder communication, Agile collaboration, and ownership of delivery risks.

Educational Requirements:
Bachelor's degree in computer science, Information Systems, or a related field.

System One, and its subsidiaries including Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.

System One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.

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