Full Stack Developer (React.js + Python) – GenAI Preferred

UsefulBI Corporation; San Francisco (CA); Hybrid; USD 110,000 - 160,000; Full time

Job summary

UsefulBI Corporation seeks a talented Full-Stack Developer to design, build, and maintain scalable web applications using React.js and Python in San Francisco, CA. The role emphasizes end-to-end delivery, collaboration with cross-functional teams, and high-quality software.

GenAI experience and LLM integration knowledge are highly preferred. The candidate will develop frontend interfaces with React.js, RESTful services with Python frameworks, and integrate with cloud providers.

Qualifications

• 3+ years of experience in full-stack development
• Strong proficiency in React.js and modern JavaScript/TypeScript
• Strong Python programming skills with FastAPI, Django, or Flask
• Experience with REST APIs and microservices architecture
• Familiarity with SQL (PostgreSQL/MySQL) and NoSQL (MongoDB) databases
• Experience with Git and version control workflows
• Understanding of authentication/authorization (JWT, OAuth)
• Knowledge of Docker and containerization

Responsibilities

• Design, develop, test, and maintain full-stack web applications with React.js and Python
• Build responsive front-ends using React.js, HTML5, CSS3, and JavaScript/TypeScript
• Develop and maintain RESTful APIs with FastAPI, Django, or Flask
• Integrate frontends with backend APIs and third-party services
• Optimize performance, scalability, and security
• Collaborate with product managers, designers, and QA throughout the lifecycle
• Write clean, maintainable, well-documented code
• Participate in code reviews, debugging, and troubleshooting
• Work with cloud platforms (AWS/Azure/GCP) and CI/CD pipelines
• Stay updated with emerging technologies and drive improvement initiatives
• Preferred GenAI experience and LLM integration familiarity

Skills

React.js

Python

FastAPI

Django

Flask

REST APIs

SQL Databases

NoSQL Databases

Git

Docker

TypeScript

CI/CD

Tools

AWS

Azure

GCP

Job description

JOB DESCRIPTION

Job Summary:

We are looking for a talentedFullStackDeveloper with strong experience in React.jsand Pythonto build and maintain scalable web applications. The ideal candidate should have experience developing end-to-end solutions, collaborating with cross-functional teams, and delivering high-quality software. Experience with Generative AI (GenAI)technologies is highly preferred.

Key Responsibilities:

• Design, develop, test, and maintainfull-stackweb applications using React.js and Python.
• Build responsive, user-friendly front-end interfaces using React.js, HTML5, CSS3, and JavaScript/TypeScript.
• Develop and maintain RESTful APIs and backend services using Python frameworks such as FastAPI, Django, or Flask.
• Integrate frontend applications with backend APIs and third-party services.
• Optimize application performance, scalability, and security.
• Collaborate with product managers, designers, and QA teams throughout the software development lifecycle.
• Write clean, maintainable, and well-documented code following best practices.
• Participate in code reviews, debugging, and troubleshooting.
• Work with cloud platforms (AWS, Azure, or GCP) and CI/CD pipelines.
• Stay updated with emerging technologies and contribute to continuous improvement initiatives.
• Preferred GenAI Experience
• Experience integrating Large Language Models (LLMs) such as OpenAI, Anthropic, or open-source models.
• Knowledge of Retrieval-Augmented Generation (RAG), prompt engineering, embeddings, and vector databases.
• Experience using AI frameworks such as LangChain, LlamaIndex, or similar.
• Familiarity with AI-powered chatbot or intelligent automation solutions is a plus.

Required Skills:

• 3+ years of experience infull-stackdevelopment.
• Strong proficiency in React.js and modern JavaScript (ES6+) or TypeScript.
• Strong Python programming skills.
• Experience with FastAPI, Django, or Flask.
• Good understanding of REST APIs and microservices architecture.
• Experience with SQL databases (PostgreSQL, MySQL) and NoSQL databases (MongoDB).
• Familiarity with Git and version control workflows.
• Understanding of authentication and authorization (JWT, OAuth).
• Knowledge of Docker and containerization.