Backend Engineer (Ruby on Rails) for Sustainable E-commerce Marketplace

Stellenbeschreibung:

Backend Engineer (Ruby on Rails) for Sustainable E-commerce Marketplace

We are looking for an experienced Backend Engineer to join the development of a mature European e-commerce marketplace focused on sustainable fashion, lifestyle products, and responsible retail.The platform connects consumers with eco-conscious brands and merchants across multiple product categories and has been evolving for more than a decade.The engineering team is actively modernizing the existing architecture while continuing to develop the product. One of the key technical initiatives is the gradual decomposition of a Ruby on Rails monolith into independent, domain-oriented services using the Strangler Fig pattern.The role combines backend product development, API design, database work, event-driven architecture, and close collaboration with frontend, product, and SRE teams.The team values pragmatic engineering, strong product ownership, sustainable code quality, automated testing, and practical use of modern AI development tools.

Benefits

Fully remote work
Free access to Udemy courses across 1,000+ topics for professional and personal development
Long-term collaboration on a mature European e-commerce product
Direct involvement in a major platform modernization and architectural transformation
Collaboration with an experienced international engineering team
Opportunity to influence technical decisions and system architecture
High level of ownership and involvement in technical decision-making

Requirements

Several years of professional backend development experience, preferably with Ruby on Rails
Strong experience designing and building REST and/or GraphQL APIs
Solid SQL and relational database knowledge, including schema design, migrations, and query optimization
Understanding of backend architecture, domain-driven design, and service-oriented systems
Experience with automated testing, preferably RSpec, and a strong focus on code quality
Basic experience with Docker and CI/CD pipelines
Ability to make pragmatic engineering decisions and work effectively in a cross-functional product team
Experience using AI-powered development tools in daily engineering workflows
Good written and spoken English and/or German

Will be a plus

Experience with gRPC and Protocol Buffers
Experience with event-driven architectures or messaging systems such as Google Cloud Pub/Sub
Experience with Kubernetes, Helm, Terraform, or Terragrunt
Experience with API gateways and JWT/JWKS-based authentication
Experience migrating monolithic applications toward service-oriented architectures
Experience with high-traffic e-commerce or marketplace platforms

Responsibilities

Develop and maintain backend services and APIs for the marketplace, including REST and GraphQL
Contribute to the gradual decomposition of the existing Rails monolith into domain-oriented services
Design internal service communication using gRPC and Protocol Buffers
Work with relational databases, including schema design, migrations, and query optimization
Implement event-driven processes and integrations using cloud messaging technologies
Write automated tests, participate in code reviews, and maintain high engineering quality standards
Collaborate closely with frontend, product, and SRE teams on APIs, architecture, and deployments
Use modern AI development tools to improve coding, testing, and review workflows

About client

Germany’s leading online marketplace for sustainable fashion and green lifestyle products. It connects conscious consumers with vetted brands and sellers offering eco-friendly alternatives across fashion, home, beauty, and daily essentials. Its model combines curated assortment, sustainability standards, and a strong marketplace experience for both shoppers and merchants.