Senior Gen AI Full-Stack Engineer: Lead & Build

Rohirrim; McLean (VA); Hybrid; USD 140,000 - 190,000; Full time

Job summary

Rohirrim is seeking a Senior Full Stack Engineer to mentor engineers, provide technical direction, and drive the development of cutting-edge Gen AI applications. You will stay hands-on with coding while leading by example in a fast-paced environment.

The role focuses 50% on backend with Nest.js/Node.js and 50% on frontend in Angular/TypeScript, contributing to scalable AI-powered enterprise web apps and system design decisions.

Qualifications

• 5+ years of professional experience as a Full Stack Engineer.
• Hands-on experience with Nest.js/Node.js.
• 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.

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.

Skills

Nest.js/Node.js

LLM integration

Prompt engineering

RAG architectures

APIs

Tools

Azure DevOps

Job description

Rohirrim is seeking a Senior Full Stack Engineer to mentor engineers, provide technical direction, and drive the development of cutting-edge Gen AI applications. You will stay hands-on with coding while leading by example in a fast-paced environment.

The role focuses 50% on backend with Nest.js/Node.js and 50% on frontend in Angular/TypeScript, contributing to scalable AI-powered enterprise web apps and system design decisions.