Senior AI / LLM Full-Stack Engineer (EST / NYC)

Senior AI / LLM Full-Stack Engineer – NextGen Coding Company

Location: USA-Based (Remote, EST hours required)

Compensation: $60/hour

Engagement: Contract (40 hours/week, long-term potential)

NextGen Coding Company is hiring a Senior AI / LLM Full-Stack Engineer to design, build, and deploy production-grade AI systems for enterprise and regulated clients. The role focuses on embedding large language models into existing applications, building robust RAG pipelines, and delivering reliable, cost-efficient AI-powered features at scale.

The ideal candidate brings strong backend engineering fundamentals, real-world LLM production experience, and the ability to collaborate directly with client engineering and product teams.

Core Responsibilities

Embed large language models into existing enterprise applications and workflows.

Design, build, and maintain Retrieval-Augmented Generation (RAG) pipelines.

Integrate AI services with internal APIs, databases, and data platforms.

Develop backend services and supporting infrastructure for AI-driven features.

Implement light frontend components as needed to support AI functionality.

Optimize prompt quality, system latency, and inference cost across deployments.

Collaborate closely with client engineers, architects, and product owners.

Support production monitoring, debugging, and iterative improvement of AI systems.

Required Skills and Experience

5+ years of professional software engineering experience.

2–3+ years of hands-on AI / LLM work in production environments.

Strong proficiency in Python.

Experience working with LLMs such as GPT-4, Claude, or equivalent models.

Practical experience building RAG systems using LangChain or similar frameworks.

Experience with vector databases such as Pinecone, FAISS, or Weaviate.

Backend development experience with FastAPI, Flask, and/or Node.js.

Frontend familiarity with React or equivalent frameworks (not design-heavy).

Cloud experience with AWS or Azure.

Experience supporting enterprise or regulated clients strongly preferred.

Full availability during Eastern Time Zone business hours.

Ideal Candidate Profile

Strong ownership mindset with the ability to ship production-ready systems.

Comfortable operating in enterprise environments with compliance and reliability requirements.

Able to balance rapid iteration with system stability and cost controls.

Clear communicator who works effectively with both technical and non-technical stakeholders.

Experienced in debugging distributed systems involving APIs, databases, and AI services.

Why Join NextGen

Work on real production AI systems for enterprise and regulated clients.

Direct exposure to modern LLM stacks, RAG architectures, and applied AI workflows.

High-impact, hands-on engineering role with strong autonomy.

Long-term contract potential with consistent, high-quality client work.