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# **About Lago** At Lago, we're on a mission to make billing simpler, more transparent, and more adaptable for SaaS companies. As the leading open-source billing platform, we empower businesses to build flexible pricing models and scale with confidence. We've raised over **$22 million in funding** from top-tier investors including **Y Combinator** and **FirstMark**, reflecting strong confidence in our vision and growth. Our platform has garnered over **9,000 stars on GitHub**, a testament to our active and growing developer community. Companies such as **PayPal**, **Synthesia** and [**Mistral.ai**](http://Mistral.ai) choose Lago for their billing. We're a team of ambitious, focused individuals who work together to solve hard problems with excellence and accountability. At Lago, we value **reliability and proactivity**โwe trust each other to own tasks, drive them to completion, and adapt quickly. While we encourage you to **try fast and "fail fast"**, we also expect you to **learn fast**: make mistakes, but don't make the same one twice. If you're excited by challenges and want to grow alongside a high-performing, supportive team, this is the place for you. # **Overview** We're looking for a Senior Frontend Engineer to own and scale Lago's frontend application. You'll work closely with our Product and Backend Engineering teams to build and ship high-quality features, maintain our design system, and ensure the frontend is reliable, performant, and consistent at scale. # **What You'll Be Doing** * Own and scale Lago's frontend app โ reliability, performance, and feature delivery * Co-design and build features with the Product and Backend Engineering teams * Maintain and enhance our design system to ensure consistency across the app * Improve monitoring and observability for frontend issues and bugs * Work autonomously in a fast-moving environment and lead your topics to completion # **Who You Are** * 5+ years of experience in frontend development * Expert-level React skills * Experience managing and scaling design systems in production * Comfortable working autonomously in a fast-paced startup environment * Proactive and ownership-driven โ 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** * You're not someone who needs a fully scoped spec to start moving โ you're comfortable with ambiguity and make progress anyway * You're not siloed โ you collaborate actively with Product, Backend, and Design and communicate clearly across teams * You're not satisfied with "it works" โ you care about performance, observability, and long-term maintainability * You're not just a feature builder โ you take pride in the systems and patterns that make the whole frontend better # **Requirements** * 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 **Nice to have** * 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 # **Why Join Lago?** * **Work with top-tier talent**: Join a team that values excellence, ambition, and accountability * **Shape the future of fintech**: Be part of a fast-growing company building the best open-source billing platform * **Remote-friendly**: Work from anywhere in Europe * **Competitive package**: Competitive salary and stock options * **Make an impact**: Own the entire frontend of a product used by companies like PayPal, Synthesia, and [Mistral.ai](http://Mistral.ai) --- Ready to Build with Us? If you're excited about joining a high-talent team to solve meaningful problems and help businesses thrive, we'd love to hear from you. Apply today and let's build something remarkableโtogether. Location type: Remote \ Primary Location: Remote Europe \ Team: Product Engineering \ Work Type: Full Time/Permanent Contract \ Salary: 60,000-90,000 EUR _(Applicants must be based in the location specified for this role. Applications from other locations will not be considered.)_
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