Senior Backend Engineer - Ruby on Rails (m/f/d)

• Own backend services in the Rails codebase end-to-end, from data model to API to background processing.
• Drive architectural decisions for the Corporate Carbon Footprint (CCF) module, focusing on scalability and performance of data-heavy workflows.
• Translate product and domain requirements into robust technical solutions, setting technical direction for the Rails codebase.
• Lead by example on code quality through reviews, refactoring, and principled trade-offs around technical debt.

This role directly contributes to reducing corporate carbon emissions by building the backbone of a carbon accounting platform that helps large organizations measure and reduce their environmental footprint.

• 7+ years of backend software development with expert-level Ruby on Rails expertise.
• Deep experience with Postgres at scale: schema design, query optimization, indexing strategy, migrations on live data.
• Track record of designing and evolving backend systems in data-heavy production environments.
• Fluent in English; valid work permit and residence in the EU (CET ±1).

• Fair compensation around €80,000 gross depending on experience.
• 28 vacation days, flexible working hours, and 100% remote work possible.
• Opportunity to shape product and culture, contribute to open source, and participate in team events.

Global Changer is a B2B SaaS platform that helps companies reduce emissions faster through carbon accounting (CCF and PCF), backed by investors like neosfer (Commerzbank Group) and serving customers such as Heraeus, Görtz, and Haniel.