Senior Full Stack Engineer

Rohirrim, Inc.; McLean (VA); Hybrid; USD 140,000 - 210,000; Full time

Job summary

Rohirrim, Inc. is seeking a Senior Full Stack Engineer to mentor engineers, provide technical direction, and drive the development of cutting-edge Gen AI powered applications. This hands-on leadership role blends architecture with coding in a fast-paced environment.

You'll work hybrid in McLean, VA, split 50/50 backend/frontend, collaborating with product managers and UI/UX designers to deliver scalable AI-driven solutions across our Rohan platform.

Qualifications

• 5+ years of professional Full Stack Engineer experience.
• Hands-on with Nest.js/Node.js in production.
• Experience with LLM providers and prompt engineering.
• Practical knowledge of RAG architectures and AI workflows.

Responsibilities

• Architect, design, and build scalable backend systems for reliability and performance.
• Develop APIs with Nest.js/Node.js and integrate with databases and LLM providers.
• Build AI-powered features including LLM orchestration and RAG workflows.
• Collaborate on frontend in Angular/TypeScript for strong UX.
• Write efficient SQL and design schemas for features.
• Work with cross‑functional teams to deliver secure AI solutions.
• Ensure high code quality via testing and reviews.
• Contribute to system design and AI capabilities direction.

Skills

Full stack engineering

LLM integration

Prompt engineering

RAG architectures

APIs with Nest.js/Node.js

Frontend/Angular/TypeScript

Tools

Nest.js

Node.js

Angular

TypeScript

Azure DevOps

LLM APIs

OpenAI

Anthropic

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!

Why Join Rohirrim?

At Rohirrim, we're at the forefront of innovation in the Gen AI space. Joining our team means being part of a dynamic environment where your leadership and expertise make a tangible impact on our products and team growth.

Senior Full Stack Engineer

Location: Hybrid — 3 days/week onsite in McLean, VA

About Us

Rohirrim is pioneering the future of enterprise AI with Rohan, our patented, domain‑aware generative AI platform. We help Fortune 1000 companies, aerospace and defense organizations, and government agencies automate complex processes like RFP creation and knowledge management.

We're a fast-growing, mission‑driven team building cutting‑edge AI products that reshape how enterprises work.

Role Overview

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.

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.