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.