Senior Java Backend Engineer |Big Data & AWS |Long-Term Contract|Hybrid Rockville, MD or Tysons, VA)

Job Title: Senior Java Backend Engineer | Big Data & AWS 
Duration: Long Term Contract
Location: Rockville, MD or Tysons Corner, VA
Schedule: Hybrid (3 days onsite per week)
Interview Process: In-person interview required in Rockville, MD

Key Skills:
Java Backend Development | Big Data | Spark | Hadoop | Hive | Presto | AWS | Microservices | REST APIs | Distributed Systems | EMR | ECS | Lambda | S3 | SQL | Jenkins | CI/CD

Summary:
Seeking a Senior Java Backend Engineer with expertise in Big Data technologies (Spark, Hadoop, Hive, Presto) and AWS cloud services. This role will design and build scalable backend applications, microservices, and data platforms processing billions of financial market events daily. Strong Java development, distributed systems, and cloud experience are required.
Responsibilities:

• Design, develop, test, deploy, and support highly scalable Java-based backend applications and microservices
• Build and optimize distributed systems that process and analyze billions of daily market events
• Develop solutions utilizing Big Data technologies including Hadoop, Spark, Hive, and Presto
• Architect and implement high-performance APIs that enable fast, reliable access to large-scale datasets
• Design scalable data processing and ingestion frameworks on AWS cloud infrastructure
• Partner with cross-functional teams to gather requirements and deliver scalable technical solutions
• Improve application performance, reliability, observability, and scalability across distributed environments
• Drive engineering best practices, code quality, testing standards, and architectural consistency
• Leverage AI-assisted development tools to improve productivity while maintaining rigorous engineering standards
• Stay current with emerging technologies and contribute to technical innovation within the organization

• Bachelor's degree in Computer Science, Information Technology, Engineering, or related technical field
• 8+ years of professional software engineering experience
• 5+ years of hands-on Java backend development experience
• Strong experience building distributed microservices architectures
• Deep understanding of RESTful API design, scalable backend systems, and distributed computing
• Experience writing and optimizing complex SQL queries

• 3+ years of hands-on experience with Big Data technologies
• Strong experience with Hadoop, Spark, Hive, and/or Presto
• Experience building and supporting large-scale data platforms and data-intensive applications
• Knowledge of distributed data processing and performance optimization

• Proven experience with AWS services including EMR, Hive/Presto, ECS, Lambda, and S3
• Experience with CI/CD pipelines and DevOps practices using Jenkins, CloudFormation, or similar tools
• Working knowledge of Python or Unix Shell scripting

• Strong problem-solving and analytical skills
• Excellent communication and stakeholder management abilities
• Ability to influence technical direction and drive engineering best practices
• Experience using AI-powered coding tools with a disciplined approach to validating output

• Strong Java backend development experience
• Big Data expertise with Spark, Hadoop, Hive, or Presto
• Experience building scalable microservices and distributed systems
• AWS cloud experience
• REST API development
• Strong SQL skills
• Experience working with large-scale data platforms
• Ability to attend an onsite interview
• Ability to work onsite 3 days per week in either Rockville, MD or Tysons Corner, VA

• Work on a greenfield platform supporting U.S. financial market integrity
• Build solutions leveraging one of the largest financial regulatory datasets in the cloud
• Process billions of market events daily using modern Big Data technologies
• Collaborate with a high-performing engineering team focused on innovation and technical excellence
• Enjoy a strong work-life balance while solving challenging large-scale engineering problems

If this is a role that interests you and you’d like to learn more, click apply now and a recruiter will be in touch with you to discuss this great opportunity. We look forward to speaking with you!

About ManpowerGroup, Parent Company of:  Manpower, Experis, and Talent Solutions 

ManpowerGroup® (NYSE: MAN), the leading global workforce solutions company, helps organizations transform in a fast-changing world of work by sourcing, assessing, developing, and managing the talent that enables them to win. We develop innovative solutions for hundreds of thousands of organizations every year, providing them with skilled talent while finding meaningful, sustainable employment for millions of people across a wide range of industries and skills. Our expert family of brands – Manpower, Experis, and Talent Solutions, – creates substantial value for candidates and clients across more than 75 countries and territories and has done so for over 70 years. We are recognized consistently for our diversity - as a best place to work for Women, Inclusion, Equality and Disability and in 2025 ManpowerGroup was named one of the World's Most Ethical Companies for the 15th year - all confirming our position as the brand of choice for in-demand talent.