Full-Stack Developer

Loudoun County, VA - USA

Monthly Salary: Not Disclosed

Experience Required: 4-5years

Posted on: 16 hours ago

Vacancies: 1 Vacancy

Job Summary

Were 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 youll design and build intelligent scalable web applications using modern frameworks such as React NestJS and MongoDB while also integrating cutting-edge AI capabilities like Retrieval-Augmented Generation (RAG) and prompt engineering to deliver contextual dynamic features.

Youll play a key role in architecting and delivering innovative solutions that fuse traditional development with next-gen AI experiences.

Key Responsibilities:

Design and develop scalable performant full-stack applications using React NestJS and MongoDB
Architect and implement AI-driven features including RAG pipelines LLM integrations and retrieval chains
Tune prompt templates embeddings and contextual data flows to optimize AI output
Build secure maintainable RESTful and GraphQL APIs
Collaborate with designers PMs and data scientists to turn complex requirements into working features
Ensure security performance and stability across frontend and backend services
Participate in peer code reviews automated testing and CI/CD pipeline enhancements
Stay informed on modern frameworks AI integration techniques and best practices

Requirements

Required Qualifications:

35 years of experience in Full-Stack Development
Proficiency in JavaScript/TypeScript React NestJS and MongoDB
Demonstrated experience building and deploying RAG-based AI systems (e.g. LLM APIs embedding models vector databases)
Working knowledge of prompt engineering techniques
Solid understanding of API design (REST & GraphQL) authentication and security best practices
Experience with Git Docker and cloud services (AWS GCP or Azure)

Preferred Qualifications:

Hands-on experience with LangChain LlamaIndex or similar frameworks
Familiarity with vector databases such as Pinecone Weaviate or Milvus
CI/CD and DevOps experience in Agile/Scrum environments
Prior experience supporting DHS or federal agencies

Benefits

Core Benefits:

Paid 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 employment
Individual or company-wide performance and recognition awards (Quarterly

Health Benefits:

UNITED HEALTHCARE PPO extensive national coverage.
INCLUDES: Medical/Dental/Vision/HSA.
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 Benefits:

Training & 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.

Special Benefits:

Performance bonus Project-based
Yearly bonus Company based

Apply Now!

You can also email your resume to . We look forward to reviewing your application!

Required Skills:

Required Qualifications: 35 years of experience in Full-Stack Development Proficiency in JavaScript/TypeScript React NestJS and MongoDB Demonstrated experience building and deploying RAG-based AI systems (e.g. LLM APIs embedding models vector databases) Working knowledge of prompt engineering techniques Solid understanding of API design (REST & GraphQL) authentication and security best practices Experience with Git Docker and cloud services (AWS GCP or Azure) Preferred Qualifications: Hands-on experience with LangChain LlamaIndex or similar frameworks Familiarity with vector databases such as Pinecone Weaviate or Milvus CI/CD and DevOps experience in Agile/Scrum environments Prior experience supporting DHS or federal agencies