Senior Full Stack Software Developer - McLean, VA

Our client currently operates a Java/Spring Boot-based environment and is now transitioning core backend services to Python. We are seeking a developer with strong Java experience who can lead and support the migration toward Python frameworks such as Django, FastAPI, and Flask. This role is ideal for someone who has worked extensively in Java and is now proficient in Python, capable of building new services while modernizing existing ones. What You Will Do

• Work on existing backend services built in Java + Spring Boot
• Lead the transition and development of new services using Python (Django / FastAPI / Flask)
• Build scalable REST APIs and microservices in both Java and Python during the migration phase
• Design and optimize database schemas using PostgreSQL
• Implement and maintain AWS CI/CD pipelines for automated deployments
• Develop and maintain test automation frameworks for both Java and Python codebases
• Collaborate with architects, DevOps, QA, and product teams to ensure smooth migration
• Troubleshoot, debug, and optimize application performance across both stacks
• Ensure best practices in security, cloud-native development, and code quality, MANTECH seeks a driven and mission-focused Python Software Developer to join our elite team based in Herndon, VA. In this role, you will contribute directly to innovative projects …
• 1 month ago

• 7-10 years of backend development experience
• Strong hands-on experience with Java + Spring Boot

• Solid experience with Python and at least one major framework:

• Django
• FastAPI/Flask
• Strong knowledge of SQL & PostgreSQL
• Experience with AWS services and CI/CD pipelines
• Hands-on experience with test automation (PyTest, JUnit, Selenium, etc.)
• Experience building REST APIs and microservices
• Ability to work in an onsite, fast-paced environment

Salary: $130,000 - $150,000 The pay range provided is a good-faith estimate and represents the range the company reasonably expects to pay for this position at the time of posting. Individual compensation may vary based on skills, experience, education, certifications, geographic location, and business needs. Equal Employer/Veterans/Disabled Navitas Business Consulting is an affirmative action and equal opportunity employer. If reasonable accommodation is needed to participate in the job application or interview process, to perform essential job functions, and/or to receive other benefits and privileges of employment, please contact Navitas Human Resources. Navitas is an equal opportunity employer. We provide employment and opportunities for advancement, compensation, training, and growth according to individual merit, without regard to race, color, religion, sex (including pregnancy), national origin, sexual orientation, gender identity or expression, marital status, age, genetic information, disability, veteran-status veteran or military status, or any other characteristic protected under applicable Federal, state, or local law. Our goal is for each staff member to have the opportunity to grow to the limits of their abilities and to achieve personal and organizational objectives. We will support positive programs for equal treatment of all staff and full utilization of all qualified employees at all levels within Navitas. Powered by, JazzHR

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