Full-Stack Developer

Ashburn, United States | Posted on 12/18/2025We're seeking a highly capable and forward-thinking Full-Stack Developer to join a high-impact team supporting mission-critical systems for the U.S. Department of Homeland Security (DHS). In this role, you'll design and build intelligent, scalable web applications using modern frameworks such as React, Next.js, NestJS, and MongoDB, while also integrating cutting-edge AI capabilities like Retrieval-Augmented Generation (RAG) and prompt engineering to deliver contextual, dynamic features.You'll play a key role in architecting and delivering innovative solutions that fuse traditional development with next-gen AI experiences.Key ResponsibilitiesDesign and develop scalable, performant full-stack applications using React, Next.js, NestJS, and MongoDBArchitect and implement AI-driven features including RAG pipelines, LLM integrations, and retrieval chainsTune prompt templates, embeddings, and contextual data flows to optimize AI outputBuild secure, maintainable RESTful and GraphQL APIsCollaborate with designers, PMs, and data scientists to turn complex requirements into working featuresEnsure security, performance, and stability across frontend and backend servicesParticipate in peer code reviews, automated testing, and CI/CD pipeline enhancementsStay informed on modern frameworks, AI integration techniques, and best practicesRequirementsRequired Qualifications3–5 years of experience in Full-Stack DevelopmentDemonstrated experience building and deploying RAG-based AI systems (e.g., LLM APIs, embedding models, vector databases)Working knowledge of prompt engineering techniquesSolid understanding of API design (REST & GraphQL), authentication, and security best practicesExperience with Git, Docker, and cloud services (AWS, GCP, or Azure)Preferred QualificationsHands-on experience with LangChain, LlamaIndex, or similar frameworksFamiliarity with vector databases such as Pinecone, Weaviate, or MilvusCI/CD and DevOps experience in Agile/Scrum environmentsPrior experience supporting DHS or federal agenciesCore BenefitsPaid Time Off PTO):TEN (10) Paid days off & FIVE (5) Floating days off.Holidays: 11 Paid Holidays. Flex time can be utilized instead of holiday time usage.Payroll: Paid Bi-Monthly.401(k): Partnered with the SECOND LARGEST Retirement plan provider in the U.S. Guaranteed 3% match. Eligibility – 21 years of age or older, after 3 months of employmentIndividual or company-wide performance and recognition awards (QuarterlyUNITED HEALTHCARE PPO, extensive national coverage.Eligible on the first of the month, immediately after the start date.Submit the enrollment form within 30 days of your start date otherwise, you will have to wait until October for the new year enrollment.Quality of Life BenefitsTraining & Career Development Reimbursement of Tuition and training needed to support career development.$150 monthly reimbursement contribution paid monthly towards parking expenses.Receipts must be submitted by the close of business on the 25th of each month.Reimbursements will be paid on the first payroll AFTER reimbursements are submitted each month.J-18808-Ljbffr