Lago - Senior Frontend Engineer

• 5+ years of experience in frontend development • Experience managing and scaling design systems in production • Comfortable working autonomously in a fast-paced startup environment • Proactive and ownership-driven — you lead your topics to completion without needing to be chased • A genuine interest in open-source or developer tools is a strong plus • Who You're Not • Who You're Not • You're not someone who needs a fully scoped spec to start moving — you're comfortable with ambiguity and make progress anyway • You're not siloed — you collaborate actively with Product, Backend, and Design and communicate clearly across teams • You're not satisfied with "it works" — you care about performance, observability, and long-term maintainability • You're not just a feature builder — you take pride in the systems and patterns that make the whole frontend better • 5+ years of professional frontend engineering experience • Strong expertise in React • Experience building and maintaining design systems in production environments • Solid understanding of frontend performance, monitoring, and observability • Strong written and verbal communication skills • A mindset of ownership, curiosity, and continuous improvement • Proficiency in GraphQL • Experience contributing to or supporting open-source projects • Familiarity with developer tools or infrastructure products • Exposure to billing, fintech, or data-intensive frontend applications