Senior AI Engineer/Architect Jobs - LLM & LangChain in Columbus
Career & Market Insight
Three distinct AI roles in one posting — Lemon.io is recruiting for AI Engineer, AI Agent Architect, and AI Automation Architect positions simultaneously. This signals strong, broad demand for AI talent across their client base of US/European startups. The skills being sought — LangChain, RAG, vector databases, multi-agent systems, LLMs — are among the hottest in the entire software industry right now, commanding premium rates globally.
Compensation transparency is limited: No figures are listed, but Lemon.io notes $11M+ paid out to its network. For context, senior AI engineers on freelance/contractor marketplaces typically command $80–$150/hr, with specialized LLM/agent architects at the upper end. Treat this as a contractor arrangement, not a salaried role — factor in self-employment taxes and benefits you'll need to self-fund.
Career development signals:
- Working across multiple startup projects accelerates exposure to diverse architectures and problem domains
- Direct client communication builds consulting and stakeholder management skills — highly transferable
- The tech stack (LangChain, RAG, vector DBs, multi-agent orchestration) is resume gold for 2025–2027 job market positioning
Green flags: No micromanagement, async culture, senior-level autonomy, and technically literate clients make for a high-quality working environment. Red flags: This is a marketplace/matching model — you're a contractor, not a Lemon.io employee. Benefits, job security, and project continuity depend on client pipeline. Ideal for engineers with 3–5+ years who want variety and rate flexibility over stability.
Headquarters: New York, NY
URL: https://lemon.io
Are you a talented Senior AI Engineer/Architect 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:
- Competitive rate based 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 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. Async communication or minimal overlap with team working hours is possible.
- We respect your seniority — no micromanagement or screen trackers.
- Communicate directly with clients, most of whom have technical backgrounds.
- Ongoing support from the time you apply through all stages of cooperation.
- Most projects involve working in a fast-paced startup environment.
- Access to a community of top developers from more than 75 countries.
We have several AI-related roles. Here are some of them:
Requirements — AI Engineer:
- 3+ years of commercial experience applying AI to practical technology solutions
- Solid understanding of Python is a must; experience with other AI-related 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
Requirements — AI Agent Architect:
- 3+ years of experience with Python
- 3+ years of experience with LLMs
- Experience with multi-agent systems architecture, AI agent orchestration, and AI telemetry is a must
Requirements — AI Automation Architect:
- 1+ year of experience with Workflow Automation and Webhooks
- 3+ years with SQL is a must
- Familiarity with AI API integration and Claude is a must
- Knowledge of Make.com, n8n, or Zapier
General Requirements (All Roles):
- Strong technical skills: ability to create projects from scratch with 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 for client calls
- Strong self-organizational skills — ability to work full-time remotely without supervision
- Reliability — we want to trust you and expect you won't let us or the client down
- Adaptability and flexibility — ability to onboard promptly after accepting a project and start delivering results quickly
Sounds good? Apply now and join the Lemon.io community!
Not Your Tech Stack?
We have a variety of projects. If you have 4+ years of commercial software development experience and are proficient in 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 & Dart, 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 — we'd love to connect with you and match you with a fitting project.
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).
To apply: https://weworkremotely.com/remote-jobs/lemon-io-senior-ai-engineer-4
Frequently Asked Questions
Is this a full-time remote job or freelance/contract work?
What timezone or schedule is required for these AI roles?
What is the salary or hourly rate for these positions?
Which countries can apply for these AI engineer roles?
Do I need experience in all three AI roles (Engineer, Agent Architect, Automation Architect)?
