Senior Back-end Ruby Engineer

Lago is the open-source platform that helps engineers build better monetization systems. We enable software teams to build customizable and scalable usage metering, subscription management, billing, invoicing, and payment systems.Lago is the leader of our category on Github (5k+ stars), won « Product of the month » on ProductHunt, and is used by leading companies such as Mistral, Together, Swan, Juni, Fintecture, JuliaHub, Regate, Flipside Crypto, Unifonic,Vida.id,Bureau.id, Sortium.Lago’s founding team previously built and scaled the home-grown monetization system of fintech unicorn Qonto from pre-launch to series D.We're a lean, ambitious team of 12 today, and we're all about Product, FinTech and Open Source.Our Product is really tech-driven, as we process and structure a lot of data, and build for developers so we have numerous exciting back-end challenges!What you'll doContribute daily to all parts of our code base, using our development workflowTackle a wide variety of technical problems throughout the stackHelp grow the back-end teamWork with out Product Team, and our Front-end Engineers to understand customer needs and challengesAnd come up with technical solutions to create and improve the best features, and our architectureThe ideal candidate will haveStrong knowledge of Ruby (at least 6 years hands-on experience)Experience working with lots of data and event-driven environmentsA genuine passion for Open-Source: if you’ve contributed to OSS projects or used OSS tools, let us know!Bonus: you’ve worked on billing or tax projects: whether it was to implement a billing system, or maintain it, or integrate it with business tools (e.g., a CRM, Finance tools)A real appetite for the early stages of co-creating a product and shaping Lago's future€60,000 - €100,000 a yearWe offer a competitive package including equity for employees based in France, we're remote-friendly, and organize regular workations usually by the ??Location:EU (+2h/-2h from Paris) This role is based either in-office in Paris in our gorgeous new office in the 10th arrondissement, and/or remote in a timezone that is +2/-2h from CET. Learn more how we think and workOpen-source does not win by being cheaper Post-mortem of our 1st YC startup: a Reverse ETLHow soon should you have a design system?How we ship fast: our frameworkOur Values Ambition: we aim big, because otherwise, where is the fun?Progress: we care more about the grit, the steep learning curve, the resilience and creativity muscles, than the current status or where you come from.Humble confidence: we know our strengths and always strive for excellence, but we also know there’s so much we don’t know yetPay it forward: we’ve all started somewhere, people gave us a hand when we needed one, we don’t forget this, and reinforce this positive cycleNot taking ourselves too seriously: we are ambitious, restless learners and hustlers, but at the end of the day, our health (physical and mental), and our loved ones are what matter the most. #J-18808-Ljbffr