SAIC

Technology integrator delivering defense IT solutions

Web Application Developer

AI Application Engineering +1Confirmed live in the last 24 hours

Full-timeReston, VA, USANo salary listedIn-person

About the Job

Requirements

A Bachelor's degree and nine or more years of experience, a Master's degree and seven or more years of experience, or a PhD or JD and four or more years of experience.
A Top Secret/Sensitive Compartmented Information clearance with polygraph.
Proven experience building production web applications with ReactJS and modern JavaScript or TypeScript.
Strong proficiency in Python and experience developing backend services and APIs using frameworks such as FastAPI, Flask, or Django.
Hands-on experience with LangChain, LangGraph, and LangSmith, or comparable LLM orchestration and observability frameworks.
Familiarity with vector databases, embeddings, and retrieval-augmented generation architectures.
Experience with continuous integration and continuous delivery pipelines and cloud deployment on AWS or Azure.
Understanding of secure development practices and compliance requirements.

Responsibilities

Design, build, and maintain responsive web interfaces using ReactJS, including state management, component architecture, and integration with RESTful and streaming APIs.
Develop and maintain scalable Python backend services and expose APIs to support front-end and AI-driven functionality.
Design, implement, and optimize AI-powered features using LangChain and LangGraph, including conversational agents, retrieval-augmented generation pipelines, and multi-step agentic workflows.
Build and maintain documented APIs connecting front-end applications with backend services and third-party LLM providers.
Contribute to continuous integration and continuous delivery pipelines for deploying, testing, and releasing web applications.
Deploy and maintain web applications and backend services in AWS and/or Azure cloud environments, ensuring high availability, security, and cost efficiency.
Collaborate with the cybersecurity team to incorporate development best practices, including secrets management, secure API design, vulnerability scanning, and compliance automation.

QVine, an SAIC company, is seeking an experienced Full Stack Web Application Developer to join our team. This role involves hands-on technical expertise in building modern, scalable web applications with a focus on AI-driven features. The ideal candidate combines strong front-end development skills in ReactJS with robust Python backend experience, including the design and integration of LLM-powered applications using LangChain, LangGraph, and LangSmith.

Key Responsibilities:

Front-End Development: Design, build, and maintain responsive, user-friendly web interfaces using ReactJS, including state management, component architecture, and integration with RESTful and streaming APIs.
Python Backend Development: Develop and maintain scalable backend services in Python, exposing clean APIs to support front-end and AI-driven functionality.
LLM Application Engineering: Design, implement, and optimize AI-powered features using LangChain and LangGraph, including building conversational agents, retrieval-augmented generation (RAG) pipelines, and multi-step agentic workflows.
API Design & Integration: Build and maintain well-documented APIs that connect front-end applications with backend services and third-party LLM providers.
CI/CD & Deployment: Contribute to continuous integration and continuous delivery pipelines to streamline code deployment, testing, and release cycles for web applications.
Cloud Deployment: Deploy and maintain web applications and backend services in cloud environments (AWS and/or Azure), ensuring high availability, security, and cost efficiency.
Security & Compliance: Collaborate with the cybersecurity team to embed best practices into the development lifecycle, including secrets management, secure API design, vulnerability scanning, and compliance automation.

Bachelors and nine (9) years or more experience; Masters and seven (7) years or more experience ; PhD or JD and four (4) years or more experience.
TS/SCI with Polygraph.
Proven experience building production web applications with ReactJS and modern JavaScript/TypeScript.
Strong proficiency in Python, with experience developing backend services and APIs (e.g., FastAPI, Flask, or Django).
Hands-on experience with LangChain, LangGraph, and LangSmith, or comparable LLM orchestration and observability frameworks.
Familiarity with vector databases, embeddings, and retrieval-augmented generation (RAG) architectures.
Experience with CI/CD pipelines and cloud deployment on AWS or Azure.
Understanding of secure development practices and compliance requirements.

About the Company

SAIC

Technology integrator delivering defense IT solutions

SAIC is a technology integrator that supports the U.S. government with engineering and IT services for defense, space, and intelligence missions. Its offerings include integrating complex systems, software, data analytics, cybersecurity, and digital engineering to help national security programs run smoothly. The company operates by combining technical expertise with large-scale government contracts, delivering end-to-end solutions from planning and development to deployment and support. Unlike many firms that focus on a single product, SAIC differentiates itself through a long history of government work, its origins as an employee-owned company, and its growth through strategic acquisitions to broaden capabilities in digital engineering, mission IT, and related services. SAIC’s goal is to enable national defense and intelligence operations by providing the technology and services needed to design, build, and maintain critical systems at scale.

Company size: 10,001+
Company stage: IPO
Headquarters: Reston, VA
Founded: 1969

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