Software Engineer (Python & Java)- Customs and Border Patrol

Ellumen
$90,000.00 - $100,000.00 / yr
United States, Virginia, Ashburn
Dec 02, 2025
Software Engineer (Python & Java) Ellumen, Inc. is looking for a talented and versatile Mid-Level Software Engineer to join our development team. In this role, you will be instrumental in maintaining and optimizing our core applications. We are looking for a developer who is comfortable working across different technology stacks. You will leverage Java for our production level chatbot services and Python for our agile backend services and text processing tasks. This is a unique opportunity to work in a hybrid environment where you can expand your skills in full-stack development and emerging AI technologies. US Citizenship and clearance required Key Responsibilities Design & Development: Write clean, scalable, and efficient code using both Java (Spring Boot/Jakarta EE) and Python (Django/FastAPI) frameworks. System Integration: Maintain and improve existing legacy Java systems while developing new microservices and integration layers using Python. System Maintenance: Apply bug fixes to Python and Java backend systems. Full Lifecycle Engineering: Participate in the full SDLC, including requirements analysis, system design, coding, unit testing, and deployment. Code Quality: Conduct peer code reviews and ensure adherence to best practices and coding standards. Collaboration: Work closely with Technical Lead, designers, and other engineers to deliver high-quality software features. Troubleshooting: Diagnose and resolve performance bottlenecks and bugs in a complex production environment. Required Qualifications Experience: 3-5 years of professional software development experience. Core Languages: Strong proficiency in Python (scripting, backend development, data handling). Proficiency in Java (object-oriented design, multi-threading, JVM tuning). Database Knowledge: Solid understanding of relational databases (PostgreSQL, MySQL). API Development: Experience designing and consuming RESTful APIs and/or GraphQL. Tools: Proficiency with version control (Git), CI/CD pipelines (Jenkins, GitHub Actions), and containerization (Docker). Education: Bachelor's degree in computer science, Engineering, or relevant industry experience. Preferred Qualifications (Nice to Have) Frontend Development: Experience with Angular (TypeScript) for building dynamic user interfaces and connecting them to backend services. Generative AI & LLMs: Experience using Python libraries (e.g., LangChain, OpenAI API, Hugging Face) to create Generative AI solutions, chatbots, or RAG (Retrieval-Augmented Generation) systems. Cloud Services: Experience deploying applications on AWS, Azure, or Google Cloud Platform. Chatbot: Experience implementing and maintaining conversational chatbot using Rasa 3. Who You Are A Problem Solver: You enjoy digging into complex issues and finding efficient solutions. A Continuous Learner: You are curious about new technologies (like AI/ML) and eager to integrate them into practical workflows. A Team Player: You communicate clearly and collaborate effectively with both technical and non-technical stakeholders.