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 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 on a product loved by engineers and product teams
Join a lean and ambitious team building foundational infrastructure
Contribute to an open-source project with real-world impact
Competitive compensation and early equity in a fast-growing company

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.)_

About the company

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, reflecting strong confidence in our vision and growth.

Our platform has garnered over 8,000 stars on GitHub, a testament to our active and growing developer community. Next-gen companies such as Mistral.ai, Groq, and Laravel chose 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—we 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.

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