Sr. Backend Developer

Job Title: Sr. Backend Developer Client: Capco / Freddie Mac Location: McLean, VA (Onsite - Local candidates only) Visa: USC or GC only Rate: $60-63/hr. on C2C Interview Process: 2 Capco interviews + in-person interview at Freddie Mac Job Description We are seeking a Sr. Backend Developer to join our team supporting Freddie Mac in McLean, VA. The ideal candidate will have strong expertise in backend development using Java, Spring Boot, Hibernate, PostgreSQL, JUnit, and Mockito , with a proven track record of delivering scalable and high-performance enterprise applications. Responsibilities: Design, develop, and maintain backend services and APIs using Java Spring Boot . Work with Hibernate and PostgreSQL to build efficient data access layers. Implement automated unit testing using JUnit and Mockito . Collaborate with cross-functional teams including front-end, QA, and business analysts to deliver high-quality solutions. Participate in code reviews, design discussions, and architectural decision-making. Troubleshoot, debug, and optimize application performance. Ensure adherence to best practices, coding standards, and security guidelines. Required Skills: Strong experience in Java, Spring Boot, Hibernate, PostgreSQL . Hands-on experience with JUnit and Mockito for unit testing. Solid understanding of software development life cycle (SDLC) and agile methodologies. Strong problem-solving and analytical skills. Excellent communication and collaboration skills. Nice to Have: Experience with Angular for front-end development. Knowledge of Kafka for event-driven architecture. Prior Freddie Mac experience is highly preferred.