Forward Deployed Engineer - 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.