Senior Java Full Stack Engineer with AWS (Backend Focus)

Senior Full Stack Engineer Java / AWS (Backend Focus) Location: Rockville, MD or McLean, VA - Hybrid Duration: 6+ months, with potential extension Pay Rate: $50/hr-$55/hour on W2 Experience: 7 8+ years of software development experience Interview Process: Technical assessment and onsite interview Eligibility: Candidates must be local to DC, Virginia, or Maryland and available for the assessment and onsite interview. Role Overview Client is seeking a hands-on Senior Full Stack Engineer to build a new application from the ground up within a fully serverless AWS architecture. The role primarily focuses on backend development, API and system integrations, and scalable processing of high transaction volumes and large datasets. Front-end expertise is not a priority. Key Responsibilities Develop backend services using Java and Spring Boot.Build and integrate serverless components on AWS, including Lambda functions using Python and/or TypeScript.Develop REST APIs and integrate applications and services across the broader enterprise ecosystem.Design and optimize SQL queries and database interactions for large-scale data processing.Implement asynchronous messaging and event-driven workflows.Build scalable, reliable services that support high transaction volumes.Collaborate with technical leads and architects on application design and implementation.Troubleshoot performance issues and improve backend reliability and throughput. Required Qualifications 7 8+ years of software development experience with strong hands-on backend expertise.Strong proficiency in Java and Spring Boot.Hands-on experience with AWS infrastructure and serverless architecture.Experience with AWS Lambda and working knowledge of Python and/or TypeScript.Strong SQL and database development skills.Experience developing REST APIs and integrating enterprise applications and services.Experience with messaging systems and asynchronous, event-driven communication.Experience building scalable systems that handle high transaction volumes or large datasets. Strong Java developers who can quickly ramp up on Python and/or TypeScript will be considered. Deep expertise in these languages is not required.