Forward Deployed Engineer

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 have 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 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.)