Remote Full-Stack AI Engineer — LLMs & Agent Workflows

Diffco; United States; Remote; USD 140,000 - 200,000; Full time

Benefits offered by this job

Competitive salary & bonuses

Flexible work hours

Remote job

Professional development opportunities

Vibrant workplace culture

Job summary

Diffco is hiring a Full Stack AI Engineer to accelerate AI feature delivery in a fast-growing SaaS environment. You will own backend and LLM integration layers, build AI agent pipelines, and help rebrand the product with updated typography and UI components.

You will collaborate with product, design, and research teams in a distributed setup, shipping high-quality features quickly while staying current with AI tooling. This role offers remote work with flexible hours and strong growth.

Qualifications

• 8+ years in software engineering with SaaS/B2B experience.
• Strong expertise in TypeScript, Node.js, React, and PostgreSQL.
• Hands-on experience integrating LLMs into production systems (prompting, tools, context management).
• Familiarity with agentic frameworks (LangChain, LlamaIndex) or building custom agent pipelines.
• Experience designing scalable, multi-region enterprise infrastructure.
• Excellent cross-team communication in distributed environments.
• Ability to ship high-quality features quickly.

Responsibilities

• Design and ship AI-powered features end-to-end, with emphasis on backend and LLM integration layers.
• Build and maintain pipelines for AI agents, RAG workflows, and API integrations with LLM providers (OpenAI, Anthropic, etc.).
• Contribute to refactoring and modernizing legacy systems with AI readiness in mind.
• Collaborate with product, design, and research teams in a distributed environment.
• Implement design updates as part of a rebranding initiative (typography, assets, UI components).

Skills

TypeScript

Node.js

React

PostgreSQL

LLM integration

LangChain / LlamaIndex

Vector databases

Distributed systems

Tools

pgvector

Pinecone

Weaviate

LlamaIndex

Job description

Diffco is hiring a Full Stack AI Engineer to accelerate AI feature delivery in a fast-growing SaaS environment. You will own backend and LLM integration layers, build AI agent pipelines, and help rebrand the product with updated typography and UI components.

You will collaborate with product, design, and research teams in a distributed setup, shipping high-quality features quickly while staying current with AI tooling. This role offers remote work with flexible hours and strong growth.