We're open-source, mainly use Ruby. Billing is interesting because it lays the ground for the monetization system of any company. Because we're heavily developer-focus, we fit very well with complex use cases for either infra companies and/or enteprises. Companies like Groq, Mistral, CoreWeave or PayPal chose Lago.
We're now heavily investing in step 2: on leveraging the usage and billing data to make the RevOps stack make more sense. Examples: https://github.com/getlago/lago-agent-toolkit or https://www.getlago.com/platform/ai
If this resonates, reach out to talent@getlago.com (whether the job is listed or not)!