Senior AI Engineer / Architect

Lemon.io helps companies in the US and Europe hire experienced engineers, from funded startups to teams like Klarna, Retool, and Pinterest. We’ve been doing this since 2015, and more than 1,500 companies have hired engineers through us.New roles for senior AI engineers come in all the time, and several are open right now.Two ways to work with clientsContract: most roles are contract-based. You join the client’s team and work as part of it.Direct hire: some clients hire engineers full-time, and we support you through the process.Because companies trust our vetting, applying through Lemon.io is often a shortcut. You get to the client faster than going through their full hiring process on your own.What you getCompetitive rate, based on your seniority and skillsWe find the projects. No client hunting or rate negotiations. We match you manually based on your skills and preferences.Flexible schedule. Work async or with a small overlap with the team’s hours.No micromanagement, no screen trackersDirect work with clients, most of them with technical backgroundsOngoing support from your application through every project, plus a community of engineers from [75+] countriesWho we’re looking forAI Engineer:3+ years of commercial experience applying AI to practical technology solutionsA solid understanding of Python is a must; experience with other programming languages commonly used in AI is a plusExperience with Vector Databases, Pinecone or Weaviate is required2+ years of experience with LangChain is mandatory2+ years of experience with large language models (LLMs) or vLLMs is mandatory2+ years of experience with RAG or OpenAI is requiredAI Agent Architect:3+ years of experience with Python3+ years of experience with LLMExperience with Multi-agent systems architecture, AI agent orchestration, AI telemetry is a must.AI Automation Architect:1+ year of experience with Workflow Automation and Webhooks3+ years with SQL is a mustFamiliarity with AI API integration and Claude Cowork is a mustKnowledge of Make.com/n8n/Zapier You own problems end-to-end: you spot the issue, design and build the solution, and ship it to productionYou can show the business impact of your work with concrete results (e.g., faster processing, lower costs, more users, fewer incidents)Advanced English: you discuss business tasks, explain your decisions, raise issues early, and present yourself and your results well on client callsYou work full-time remotely and deliver without supervisionYou onboard quickly and start shipping in your first weeks How it worksApply and complete your profileVerify your roleOnce approved, we match you with a project. Typical time to first project: 3 weeksReady? Apply and join the Lemon.io community. NOT YOUR TECH STACK?We're placing Senior Developers (4+ yrs commercial experience) across Site Reliability Engineering, Platform Engineering, Enterprise Software 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 & An gular, 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, Angular, Python & Node, React & Node.js, Node & TypeScript, 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 do not provide visa assistance, and our cooperation model does not include the benefits typically offered with direct hire.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).