Senior Full Stack Java Developer

Location: Washington, DC (On-site).

Employment Type: Contract (W2 through ZipStaff — No C2C or 1099).

About the Opportunity: ZipStaff is seeking an experienced Senior Full Stack Developer / Engineer (Java / Angular / AWS) to join a high-impact team for a major transportation organization. In this role, you will design, develop, and maintain high-performance microservices and modern web applications while leveraging AWS cloud services and event-driven architectures. You will take end-to-end ownership of full-stack feature delivery, automated CI/CD pipelines, and application observability.

What You’ll Do: Architect, develop, and deploy scalable microservices and RESTful APIs using Java and Spring Boot. Design and build responsive, user-friendly frontend interfaces using Angular. Build and maintain serverless and containerized cloud applications on AWS utilizing Lambda, ECS, DynamoDB, and EventBridge. Configure and support core AWS infrastructure, including API Gateway, SQS, SNS, VPC, and Secrets Manager. Implement event-driven architectures and messaging systems to ensure seamless asynchronous processing. Automate continuous integration and continuous deployment (CI/CD) pipelines using Jenkins, GitHub Actions, or AWS Code Pipeline. Monitor, troubleshoot, and optimize application performance and observability using Dynatrace and enterprise tooling. Collaborate using GitHub for version control and leverage AI tools like GitHub Copilot to enhance development efficiency.

Required Qualifications: 5+ years of full-stack software engineering experience. High proficiency in Angular and modern web technologies. Strong programming foundation in Java and Python. Extensive hands-on experience in Spring Boot microservice development and RESTful API design. Demonstrated experience with core AWS services, including AWS Lambda, DynamoDB, and Amazon ECS. Practical knowledge of AWS networking and application services (API Gateway, SQS, SNS, VPC, EventBridge, Secrets Manager). Working knowledge of CI/CD pipelines, event-driven architectures, and messaging systems. Experience with GitHub, version control workflows, and monitoring tools such as Dynatrace. Ability to work on-site in Washington, DC.Preferred Qualifications: Experience with Adobe Experience Manager (AEM), Adobe tools, GitHub Copilot, or Ionic. Prior full-stack delivery in a large enterprise or transportation environment. Background building event-driven and serverless architectures on AWS. Hands-on work with observability tools beyond basic monitoring.

Benefits: Health Insurance. Dental Insurance. Vision Insurance. 401(k) + 401(k) matching. Paid time off. Referral Program. About ZipStaff: ZipStaff partners with leading organizations to connect skilled technology professionals with high-impact contract opportunities. We focus on quality matches, clear communication, and long-term success for candidates and clients. To apply, submit your resume highlighting your full-stack experience with Java/Spring Boot microservices, Angular frontends, AWS services (Lambda, ECS, DynamoDB, and related), CI/CD, and event-driven architectures. Pure research or junior experience will not be considered.