Back End Developer

RQ00203 - Senior Backend Engineer at Rockville, MD-3 days onsite and F2F is a MustRequired Qualifications:· Bachelor’s degree in computer science, Information Technology, Engineering, or related technical field· 8+ years of professional software engineering experience with demonstrated leadership capabilities· 3+ years of hands-on development experience in Java, JavaScript/TypeScript, or SQL· 2+ years developing REST/web services and writing complex SQL queries for relational databases· 3+ years working with big data technologies such as Hadoop, Spark, or Presto· Proven experience with AWS services including EMR (Hive/Presto), ECS, Lambda, and S3· Proficiency with DevOps practices and CI/CD pipelines using tools like Jenkins and CloudFormation· Working knowledge of scripting languages including Unix Shell or Python· Experience using LLM-based coding tools with a disciplined approach to validating output — you don't merge what you can't explain