Senior AWS Java Full Stack Developer

Systemone is seeking a Senior AWS Java Full Stack Developer to lead the development and support of cloud-based applications in an AWS-focused financial services environment.

This role combines advanced hands-on development with technical leadership across Java, Spring Boot microservices, Angular, and AWS.

Your Future Duties and Responsibilities

• Make component-level technical decisions and build secure, scalable services.
• Improve application performance, reliability, and operational readiness.
• Guide implementation teams and align development with enterprise standards.
• Strengthen automated testing and software delivery practices.
• Resolve complex issues across services and distributed applications.
• Mentor developers and provide technical guidance.
• Evaluate technical trade-offs and document implementation decisions.

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

Desired Skillset

• Apache Kafka: Producers, consumers, topics, consumer groups, event streaming, error handling, and performance tuning.
• Docker and Kubernetes: Container optimization, deployments, scaling, and troubleshooting.
• CI/CD and DevOps: Git, GitHub Actions, Jenkins, or Azure DevOps, including build automation, CI/CD pipelines, and release practices.
• API Integration: OpenAPI/Swagger, authentication, authorization, versioning, and API contracts.
• UI Test Automation: Playwright and LambdaTest for reusable UI automation, regression testing, cross-browser execution, and troubleshooting unreliable tests.
• AI Development Tools: GitHub Copilot or similar tools, including guidance on generated-code reviews, test coverage, and security.
• Problem-Solving and Collaboration: 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 Joulé, ALTA IT Services, CM Access, TPGS, and MOUNTAIN, LTD., are leaders in delivering workforce solutions and integrated services 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 full-time 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.