Senior Full Stack Developer- Python
REI Systems2 years ago
Sterling, VA, USASenior / Staff+
Responsibilities
- Design, develop, test, maintain, and modernize secure, scalable full stack enterprise web applications.
- Build frontend interfaces using JavaScript/TypeScript, HTML, CSS, and component-based frameworks such as React or Angular.
- Develop Python-based backend services, business logic, RESTful APIs, microservices, integrations, and data-access components.
- Create generative AI and LLM applications, including RAG, prompt engineering, tool calling, structured outputs, intelligent search, summarization, classification, and workflow automation.
- Design ingestion, preprocessing, transformation, metadata, validation, and retrieval pipelines for enterprise documents and structured data.
- Work with relational databases, SQL, enterprise APIs, document repositories, object storage, search platforms, and cloud data services.
- Deploy application components in AWS or Azure, containerize services with Docker, and collaborate with cloud and DevOps engineering teams.
- Implement unit, integration, API, and automated tests; participate in code reviews, defect resolution, and technical design discussions.
- Apply secure coding, authentication, authorization, secrets management, data protection, API security, federal compliance, and DevSecOps practices.
- Use logging, metrics, tracing, monitoring, and troubleshooting practices to support operational readiness and performance.
- Maintain technical documentation and work within Agile/Scrum teams on planning, refinement, demonstrations, and retrospectives.
- Independently own complex features, contribute to design decisions, mentor less-experienced developers, and communicate with technical and non-technical stakeholders.
Requirements
- Approximately 5–8 years of professional software development experience, including hands-on full stack application development.
- Bachelor’s degree in computer science or a related field.
- Strong backend development experience with Python, Java, and/or .NET technologies and enterprise application patterns.
- Strong frontend experience with JavaScript/TypeScript, HTML, CSS, and a modern component-based web framework.
- Experience designing, developing, and integrating RESTful APIs and backend services.
- Working knowledge of SQL, relational databases, data modeling, and application data-access patterns.
- Experience with Git, branching strategies, code reviews, unit testing, integration testing, automated testing, and defect troubleshooting.
- Working knowledge of CI/CD pipelines and application deployment practices.
- Experience working in Agile/Scrum multidisciplinary development environments.
- Experience with or willingness to work across LLM applications, RAG, embeddings, semantic search, vector databases, document processing, and AI guardrails.
- Preferred experience with FDA, HHS, or other federal programs and with AWS or Azure enterprise application deployment.
- Preferred experience with React or Angular; FastAPI, Spring Boot, ASP.NET Core, or comparable frameworks; Docker; Kubernetes; OAuth 2.0; OpenID Connect; role-based access control; observability; and DevSecOps.
- Understanding of microservices, event-driven integration, enterprise application architecture, accessibility requirements, and federal web application standards is preferred.
- Strong analytical, troubleshooting, communication, documentation, mentoring, and knowledge-sharing skills.
- Must be able to obtain and maintain a clearance.
Benefits
- Hybrid work arrangement requiring two days per week at the Sterling, Virginia headquarters.
- Professional development opportunities and meaningful technology projects.
- Flexibility to spend time with family and friends.
- Work supporting federal FDA technology modernization and digital transformation initiatives.
Tech Stack
AngularAWSAzureC#CSSDockerFastAPIGitHTMLJavaJavaScriptKubernetes.NETPythonReactSpring BootSQLTypeScript
Categories
About REI Systems
REI Systems provides full-lifecycle software engineering, data analytics, and modernization services to U.S. federal, state, and local agencies and nonprofits, including grants and case management solutions and cloud implementations. The privately held, 100% employee-owned firm delivers consulting and systems integration and supports programs at agencies such as the FDA. Founded in 1989 and headquartered in Sterling, Virginia, it focuses on open source, SaaS, and application modernization.