Principal Tech Lead (Backend oriented)

Posted 7/1/2026 · last confirmed live 8/26/2026

At Similarweb, we are revolutionizing the way businesses interact with the digital world by revealing to them everything that happens online.  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. 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. We are looking for a Principal Tech Lead to join our team. Why is this role so important at Similarweb? The Principal Tech Lead will serve as the premier architectural authority within the group, directly shaping the high-scale backend engines that power Similarweb’s Intelligence products. This role demands a unique combination of elite software craftsmanship, visionary systems design, and hands-on execution velocity. The ideal candidate will work on turning massive, multi-terabyte datasets into highly actionable, real-time insights for global enterprises, while acting as the ultimate catalyst for engineering excellence across the group. So, what will you be doing all day? As a Principal Tech Lead, your daily impact spans deep-tech execution, organizational mentorship, and bleeding-edge paradigm adoption: Architectural Governance: Own the end-to-end design, scalability, and performance of complex backend distributed systems. Ensure architectures are resilient, modular, and optimized for intensive data workloads. Agentic Engineering Innovation: Champion and embed Agentic SDLC paradigms, tools and solutions into the engineering lifecycle. Design frameworks that enable autonomous AI agents to build, test, and deploy features end-to-end, while enforcing rigorous quality gates and deterministic production guardrails. Cross-Project Orchestration: Maintain an exceptionally large context window to actively guide and facilitate multiple highly technical streams and parallel projects simultaneously without losing focus or delivery speed. Guild Leadership & Mentorship: Act as the primary technical sounding board for the engineering community. Lead backend guild sessions, introduce emerging technologies, and actively mentor senior and staff engineers to elevate the group's collective capabilities. High-Velocity Execution: Lead by example. When taking on critical path, hands-on tasks, execute with unmatched speed and quality, demonstrating what peak operational efficiency looks like. The matrix below outlines the exact dimensions of performance and capability required for success in this role: Competency Pillar Expectations & Scope   System Architecture Design, build, and maintain highly scalable backend engines for Similarweb Intelligence products, managing complex data pipelines and high-throughput production systems. Agentic Engineering Pioneer and scale Agentic Engineering workflows, tools, and solutions. Enable autonomous agents to build robust end-to-end features while guaranteeing high-end production quality. Technical Leadership Act as a deep-dive technical sounding board. Lead specialized engineering guild sessions, mentor senior talent, and foster a culture of continuous learning and development. Multi-Project Facilitation Leverage an exceptionally large mental context window to seamlessly orchestrate and facilitate multiple parallel engineering streams without losing execution velocity. This is the perfect job for someone who: Seasoned Architect: Proven track record of designing and scaling complex, large-scale distributed production systems under heavy load. Deep-Dive Problem Solver: Innate curiosity and technical depth that makes you the go-to expert with whom peers across the organization want to collaborate and bounce architectural ideas. AI & Agentic Pioneer: Deep, practical familiarity with Agentic Engineering concepts, tools, LLM APIs, orchestration frameworks, and prompt-to-production paradigms. Natural Mentor: Passionate about cultivating talent, active community engagement, and driving internal knowledge-sharing frameworks. **At Similarweb, collaborating with our colleagues in-office creates a more connected, unified culture. Our best work is a product of our face-to-face collaboration, with the ability to work partially from home.** Why you’ll love being a Similarwebber: You’ll actually love the product you work with: Our customers aren’t our only raving fans. When we asked our employees why they chose to come work at Similarweb, 99% of them said “the product.” Imagine how exciting your job is when you get to work with the most powerful digital intelligence platform in the world. You’ll find a home for your big ideas:   We encourage an open dialogue and empower employees to bring their ideas to the table. You’ll find the resources you need to take initiative and create meaningful change within the organization.  We offer competitive perks & benefits: We take your well-being seriously, and offer competitive compensation packages to all employees. We also put a strong emphasis on community, with regular team outings and happy hours. You can grow your career in any direction you choose: Interested in becoming a VP or want to transition into a different department? Whether it’s Career Week, personalized coaching, or our ongoing learning solutions, you’ll find all the tools and opportunities you need to develop your career right here. Diversity isn’t just a buzzword: People want to work in a place where they can be themselves. We strive to create a workplace that is reflective of the communities we serve, where everyone is empowered to bring their full, authentic selves to work. We are committed to inclusivity across race, gender, ethnicity, culture, sexual orientation, age, religion, spirituality, identity and experience. Our culture of equality and mutual respect also helps us better understand and serve our customers in a world that is becoming more global, more diverse, and more digital every day. 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This role is published by Similarweb on greenhouse. SwiftFit is not the employer and does not accept applications.