ABOUT LAGO At Lago, we're on a mission to make Monetization simpler for tech companies. As the leading open-source billing platform, we help businesses 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. Our platform has garnered around 10K stars on GitHub, a testament to our active and growing developer community. Companies such as PayPal, CoreWeave, Synthesia, and Mistral.ai http://Mistral.ai choose Lago for their billing. And we have barely spent any money on Marketing or Ads so far. We're a team of ambitious, focused individuals who solve hard problems with excellence and accountability. At Lago, we value reliability and proactivity. We trust each other to own tasks, drive them to completion, and continuously improve them. 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 At Lago, Forward-Deployed Engineers (FDEs) are engineers embedded with customers. They build, integrate, and optimize Lago in production environments: ensuring adoption, scalability, and impact. This role blends engineering depth with delivery ownership and customer collaboration. You’ll write code, deploy systems, and translate real-world use cases into product-ready insights. FDEs are not part of the reactive support queue, and they’re not isolated in core product development. They sit at the intersection of engineering and delivery: the engineers who turn product flexibility into customer success. WHAT YOU’LL BE DOING - Own technical delivery for Tier 1 customers: from architecture design to deployment. - Build custom integrations, connectors, and workflows using Lago’s Ruby on Rails APIs, React, and TypeScript stack. - Design data ingestion pipelines and automation scripts (PostgreSQL, Redis, Kafka). - Configure and optimize billing, metering, and event processing setups tailored to customer environments. - Collaborate with Support Engineers on reliability handoffs and Core Engineering on product extensions. - Write reusable code, documentation, and best-practice templates for future implementations. - Surface recurring patterns or feature gaps to Product and Engineering for roadmap input. - Mentor customer teams on Lago’s architecture, SDKs, and deployment patterns. WHO YOU ARE - A software engineer/technical expert who thrives in hands-on, customer-facing environments. - Enjoys designing integrations, data pipelines, and technical architectures. - Communicates clearly, balancing technical detail with customer empathy. - Resourceful and comfortable navigating ambiguity. - Eager to work across code, delivery, and customer experience. WHO YOU’RE NOT - You’re not part of reactive support queues: you plan, build, and deliver. - You’re not detached from customers: you embed and advise. - You’re not limited to writing specs: you ship and document your work. - You’re not chasing short-term fixes: you design systems that scale. REQUIREMENTS - 4+ years of experience working closely with APIs and SDKs (in Ruby/React would be a bonus but can be multiple languages) - Deep understanding of REST APIs, authentication, and integration patterns. - Strong SQL and data modeling skills (PostgreSQL, Redis, Kafka a plus). - Experience designing and deploying production-ready integrations. - Excellent written and verbal communication skills for both technical and non-technical stakeholders. - Proven ability to manage delivery timelines and coordinate across teams. Nice to have - Experience in technical consulting, professional services, or customer engineering. - Familiarity with Terraform, Docker, or CI/CD environments. - Background in billing, payments, or developer platforms. - Prior contribution to open-source or customer-led product delivery. Growth path - Technical: Senior → Core Engineering / Product Architecture. - Cross-functional: Product Manager. - Leadership: FDE Lead → Head of Professional Services / Customer Engineering. FDEs form the bridge between engineering and real-world adoption: turning technical capability into customer outcomes. WHY JOIN LAGO? - Work with top-tier international talent: Join a team that values excellence, slope over intercept, and accountability. We have convinced top-tier investors and companies to trust us with mission-critical systems like billing. We have 12+ nationalities on the team and are building a global company with a global culture. - Shape the future of monetization and fintech: The world is changing. Monetization systems are shifting with AI, and you will be at the forefront of this revolution. - Fully remote: Work from anywhere in Europe - Competitive package: Competitive salary and stock options - Make an impact: Your work will directly shape how customers like Mistral, Groq, Synthesia, and established enterprises monetize and grow. 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 remarkable—together. Location type: Remote Primary Location: Remote Europe Team : GTM Work Type: Full Time/Permanent Contract Salary: 70,000-100,000 EUR per year (Applicants must be based in the location specified for this role. Applications from other locations will not be considered.)