[Hiring] Senior AI Engineer @Lemon.io

Remotive SARL; United States; Remote; USD 140,000 - 210,000; Full time

Job summary

Lemon.io is hiring a remote Senior AI Engineer. Location: Northern America, LATAM, Europe, APAC. Work with startups in the US and Europe, with projects across AI Engineer, AI Agent Architect, and AI Automation Architect roles.

As a Senior AI Engineer, you will tackle practical AI solutions, work across Python-based stacks, and collaborate with global teams. The role emphasizes remote work, extensive independence, and high-quality project delivery.

Qualifications

• 3+ years of commercial experience applying AI to practical technology solutions.
• Solid understanding of Python is a must; experience with other AI languages is a plus.
• Experience with Vector Databases (Pinecone or Weaviate) is required.
• 2+ years of experience with LangChain is mandatory.
• 2+ years of experience with large language models (LLMs) or vLLMs is mandatory.
• 2+ years of experience with RAG or OpenAI is required.

Skills

Python

LangChain

LLMs

Pinecone/Weaviate

Vector Databases

RAG/OpenAI

Tools

Python

LangChain

LLMs

RAG

OpenAI

Job description

Sep 18, 2026 - Lemon.io is hiring a remote Senior AI Engineer. Location: Northern America, LATAM, Europe, APAC.

Are you a talented Senior AI Engineer looking for a remote job that lets you show your skills and get decent compensation? Look no further than Lemon.io — the marketplace that connects you with hand-picked startups in the US and Europe.

What we offer:

• The rate depends on your skills and experience. We've already paid out over $11M to our engineers.
• No more hunting for clients or negotiating rates — let us handle the business side of things so you can focus on what you do best.
• We'll manually find the best project for you according to your skills and preferences.
• Choose a schedule that works best for you. It’s possible to communicate async or minimally overlap within team working hours.
• We respect your seniority so you can expect no micromanagement or screen trackers.
• Most of our projects involve working in a fast-paced startup environment. We hope you like it as much as we do.
• Through our community, we will connect you with the best developers from more than 75 countries.

We have several AI-related roles: AI Engineer, AI Agent Architect, AI Automation Architect.

Requirements - AI Engineer:

• 3+ years of commercial experience applying AI to practical technology solutions
• A solid understanding of Python is a must; experience with other programming languages commonly used in AI is a plus
• Experience with Vector Databases, Pinecone or Weaviate is required
• 2+ years of experience with LangChain is mandatory
• 2+ years of experience with large language models (LLMs) or vLLMs is mandatory
• 2+ years of experience with RAG or OpenAI is required

• Strong technical skills: as a Senior AI Engineer, you are expected to be able to create projects from scratch and have a deep understanding of application architecture.
• Clear and effective communication in English — advanced ability to discuss business tasks, justify decisions, and communicate issues. Good self-presentation is also essential for upcoming client calls.
• Strong self-organizational skills — ability to work full-time remotely with no supervision.
• Reliability — we want to trust you and expect that you won’t let us and the client down.
• Adaptability and Flexibility — the ability to onboard the project promptly after accepting it and start delivering results quickly.

NOT YOUR TECH STACK?

We're placing Senior Developers (4+ yrs commercial experience) across AI Agent Architecture, AI Automation Architecture, AI Engineering, Site Reliability Engineering, Platform Engineering, React & Python, React & Golang, Golang, React & Java, React & Ruby, Ruby, PHP & Vue, Vue & Node.js, React & .NET, Android & iOS, iOS & Swift, Flutter & Firebase, Solutions Engineer, Blockchain (Ethereum/Ethers.js/Wagmi/Viem/Solana), Angular & Node.js, Vue & .NET, Python & Vue, DevOps, MLOps, Data Science, Angular & PHP, Angular & .NET, Symfony & React, Symfony & Vue, Symfony & Angular, Python, Symfony & JavaScript & Next.js & TypeScript, Data Analysis, React & PHP, Data Engineering, Project Management, Product Management, QA Automation, QA Manual, Embedded Software Engineering, React Native & Node, React Native & React, React Native & Ruby, React Native & Python, WordPress, Android, Data Annotation, Angular, Python & Node, React & Node.js, Java & Spring, Svelte & Python, Svelte & Node.js, Svelte & TypeScript, Rust, Shopify & JavaScript, Vue & Nuxt, PHP & Laravel, UI/UX Design, Animation, Graphic Design, React & Node & React Native, .NET & C#, Electron, Scala, C++, Unreal Engine & C++, Python & LLM, Unity, or Machine Learning Engineering and more. Reach out and we'll match you.

We work with developers from 75+ countries across Europe, Latin America, North America (the U.S. and Canada), selected countries in Asia (Japan, Singapore, South Korea, the Philippines, Indonesia, Malaysia, Vietnam, Thailand, and Israel), Oceania (Australia, New Zealand, and Papua New Guinea), and Africa (including Morocco and South Africa).