<p>At Similarweb, we are revolutionizing the way businesses interact with the digital world by revealing to them everything that happens online. </p> <p>Our unique data and solutions empower thousands of customers globally, including industry giants like Google, eBay, and Adidas, to make game-changing decisions that drive their digital strategies.</p> <p>In 2021, we went public on the New York Stock Exchange, and we continue to reach new heights! Come work alongside Similarwebbers across the globe who are bright, curious, practical, and good people.</p> <p><strong>Why is this role so important at Similarweb?</strong></p> <p>AI is changing how every team at Similarweb works - how we research, how we build, how we sell, and how we support our customers. Rather than have every team solve the same hard problems from scratch, we are building a single, company-wide AI platform that everyone builds on.</p> <p>As an AI Engineer on the AI Platform team, you will build that foundation: the agent runtime, the tool and data layer, the model gateway, and the evaluation and observability infrastructure that turn AI experiments into reliable production systems. Your users are Similarwebbers - engineers, analysts, data scientists, and business teams across the organization - and your work is what lets them ship agents and AI-powered workflows in days rather than quarters. This is a high-leverage, horizontal role. You will not be building one AI feature; you will be building the platform that dozens of AI use cases run on, and setting the standards for how AI is built and operated at Similarweb.</p> <p><strong>So, what will you be doing all day?</strong></p> <ul> <li>Design and build the core agent platform - runtime, orchestration, state and memory management, and a shared agent SDK that teams across the company use instead of rebuilding foundations. </li> <li>Build and operate the tool and connector layer, including MCP servers that expose Similarweb data, internal systems, and third-party services to agents in a consistent, safe way. </li> <li>Develop LLM-based agents for high-value internal workflows, and turn the reusable parts of each one back into platform capabilities.</li> <li>Implement integrations that let agents take automated actions on behalf of users, streamlining workflows and reducing manual overhead. Model gateway and governance.</li> <li>Establish secure-by-default patterns: permissioning and data-access boundaries, PII handling, prompt injection defenses, and audit logging, in line with Similarweb’s security and privacy standards.</li> <li>Continuously evaluate and improve the performance of AI models and agents to ensure high-quality, data driven results.<br><br></li> </ul> <p><strong>This is the perfect job for someone who:</strong></p> <ul> <li>5+ years of experience in software engineering, with strong proficiency in Python.</li> <li>Hands-on experience with LangGraph, LangChain, or similar frameworks for building AI agents.</li> <li>Strong understanding of LLMs, prompt engineering, and AI agent architectures.</li> <li>Solid grounding in production engineering: REST APIs, asynchronous services, integrating external data sources, containers, and CI/CD.</li> <li>Strong collaboration and communication skills, including with non-engineering stakeholders across the business.</li> </ul> <p><strong>Preferred Skills:</strong></p> <ul> <li>Familiarity with the AI Agents ecosystem, including different LLM providers, vector store solutions, MCPs, and more.</li> <li>Experience with evaluating LLM performance and quality, and with LLM observability tooling</li> <li>LLMOps experience: cost and latency optimization, semantic caching, model routing, and capacity planning.</li> <li>Experience designing RAG systems over large or heterogeneous data sources.</li> <li>Awareness of AI-specific security and safety concerns, and how to mitigate them in a multi-tenant internal platform.</li> <li>Familiarity with cloud environments, especially AWS, and with Kubernetes and infrastructure-as-code.</li> </ul> <p><strong><br></strong><strong>Why you’ll love being a Similarwebber:</strong></p> <ul> <li data-stringify-indent="0" data-stringify-border="0"><strong data-stringify-type="bold">Impact </strong><strong data-stringify-type="bold"><span class="c-emoji c-emoji__medium c-emoji--inline" data-qa="emoji" data-sk="tooltip_parent"><img style="max-width: 100%;" src="https://a.slack-edge.com/production-standard-emoji-assets/14.0/apple-medium/1f60e.png" alt=":sunglasses:" data-stringify-type="emoji" data-stringify-emoji=":sunglasses:"></span></strong><strong data-stringify-type="bold">:</strong> Work with the world’s leading digital intelligence platform and make a real difference.</li> <li data-stringify-indent="0" data-stringify-border="0"><strong data-stringify-type="bold">Innovation </strong><strong data-stringify-type="bold"><span class="c-emoji c-emoji__medium c-emoji--inline" data-qa="emoji" data-sk="tooltip_parent"><img style="max-width: 100%;" src="https://a.slack-edge.com/production-standard-emoji-assets/14.0/apple-medium/1f680.png" alt=":rocket:" data-stringify-type="emoji" data-stringify-emoji=":rocket:"></span></strong><strong data-stringify-type="bold">:</strong> Bring your ideas forward - we empower you to drive change.</li> <li data-stringify-indent="0" data-stringify-border="0"><strong d