Senior Full Stack Developer

Summary

Join RainFocus, a leading software company, as a Sr. Full Stack Developer (AI Focus) to build the next generation of tools for large-scale events. You will architect and develop enterprise-grade web applications using Java and React, contributing to an AI agent platform with LLM integrations. Collaborate with product management and UX teams to create client-facing experiences and build advanced prototypes. This role requires strong full-stack development skills, experience with LLMs and AI agents, and expertise in database design and advanced SQL. The position offers the opportunity to work remotely within the United States and includes competitive salaries, benefits, 401k, and generous PTO.

Requirements

• Have a strong technical background, including 5+ years of experience working on full stack code bases and doing anything it takes to solve problems and delight users
• Experience working with LLMs, AI agents, or RAG architectures
• Experience architecting complex solutions, then projecting your vision and thought process to other developers
• Experience peer reviewing code while providing feedback and improvements
• Very strong written and verbal communication skills
• Experience with Agile Software Development methodologies
• Experience in Object-Oriented design and programming
• Experience in RDBMS (MySQL, Oracle, MSSQL, etc.) including database design and advanced SQL
• Experience with front-end development using a modern JavaScript framework such as React, Angular, or Vue
• Strong interest in development platforms, Data Engineering, MLOps, AI, CI/CD, infrastructure or making products for technical teams
• Able to make effective trade-offs in regards to both engineering and product requirements, while balancing short term and long term needs
• Strong expertise with backend systems in service-oriented architectures

Responsibilities

• Develop and maintain our core product set with a focus on usability, security, and scalability
• Contribute to the design and implementation of our AI agent platform, including LLM integrations and supporting infrastructure
• Collaborate closely with Product Management and UX to build thoughtful, client-facing experiences
• Build and iterate on advanced prototypes that integrate LLMs, APIs, and retrieval pipelines
• Implement full-stack features—from database schema and backend services to frontend components and real-time user interactions

Preferred Qualifications

• Familiarity with LangChain, LlamaIndex, or other AI frameworks
• Experience driving zero-to-one development of key technical capabilities
• Strong problem-solver who can untangle complex systems, find the root cause, and fix issues without duct tape solutions
• Creative thinker who spots opportunities for smarter solutions and isn’t afraid to pitch bold ideas that actually move the needle
• Comfort working with vector databases (e.g., Pinecone, Weaviate, FAISS)
• Experience with Struts2 MVC, Spring Framework
• Experience integrating with 3rd party systems via APIs
• Prior experience as a team lead

Benefits

• Competitive salaries
• Competitive benefits
• 401k
• Generous PTO