Senior Full Stack Engineer at Rohirrim in McLean, VA

Job description

• Are you passionate about pushing the boundaries of technology in the Gen AI space? Rohirrim is seeking a Senior Full Stack Engineer to mentor engineers, provide technical direction, and drive the development of cutting-edge applications. If you thrive in a fast-paced environment and enjoy leading by example while staying hands-on with coding, we want to hear from you!
• We are seeking a Senior Full Stack Engineer (50% backend / 50% frontend, or someone who is flexible with the split) to help design, build, and scale our generative AI-powered enterprise web applications. You'll play a key role in architecting services, ensuring performance and reliability, and contributing to frontend features that deliver great user experiences. This is a hands-on, senior-level role where you'll collaborate closely with product managers and UI/UX designers.

Responsibilities

• Architect, design, and build scalable backend systems with a focus on reliability, performance, and maintainability.
• Develop APIs and services in Nest.js/Node.js, integrating with databases, LLM providers, and external systems.
• Build and integrate features powered by generative AI, including LLM orchestration, prompt design, and retrieval-augmented workflows within Rohan.
• Contribute to frontend development in Angular/TypeScript, ensuring seamless user experiences.
• Write efficient, maintainable SQL queries and design database schemas for application features.
• Collaborate with cross-functional teams to deliver secure and scalable AI-driven solutions.
• Ensure high code quality via testing, code reviews, and best practices.
• Participate in system design discussions and help set technical direction, including how AI/LLM capabilities are architected into the platform.

Requirements

• 5+ years of professional experience as a Full Stack Engineer.
• Strong experience with TypeScript/JavaScript.
• Hands-on experience with Nest.js/Node.js.
• Hands-on experience with a JavaScript UI framework (Angular/React/Vue).
• Strong SQL skills (schema design, query optimization).
• Basic knowledge of Azure DevOps (pipelines, workflows).
• Hands-on experience integrating with LLM providers/APIs (e.g., OpenAI, Anthropic, Azure OpenAI) in a production application.
• Practical experience with prompt engineering and retrieval-augmented generation (RAG) architectures.

Skills

Required

• TypeScript/JavaScript
• Nest.js/Node.js
• Angular/React/Vue
• SQL
• Azure DevOps
• Prompt engineering
• Retrieval-augmented generation (RAG)