Senior Backend Developer, Ruby on Rails

ablefy

full-time

Posted on: 9/24/2025

Origin: • 🇩🇪 Germany

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Senior

NoSQLPostgresRubyRuby on Rails

About the role

Lead development of scalable, user-centric software for ablefy's SaaS platform.
Design, build, and maintain high-quality Ruby code using best practices.
Work on technical feasibility assessments, developing new solutions, architecture, and process improvements.
Build back-end components for web applications.
Collaborate with other developers and stakeholders to understand requirements and develop solutions.
Test applications for performance, responsiveness, and security.
Participate at all stages of the development lifecycle.
Maintain existing applications and make necessary updates and enhancements.
Stay informed about relevant new technologies and drive their continuous adoption and integration into the design.
Build and integrate AI-powered capabilities that create user and platform value.

At least 4+ years of commercial experience with Ruby-on-Rails.
Experience with architecture decisions and development process improvements.
Solid understanding of object-oriented programming.
Understanding of fundamental design principles behind a scalable application.
Deep experience with version control systems like Git.
An eye and passion for clean code.
Problem-solving skills.
Understanding of agile software development.
Fluent in English.
Experience in test-driven development (nice to have).
Good understanding of CI/CD process (Circle CI, GitHub Actions) (nice to have).
Hands-on experience with PostgreSQL & NoSQL databases (nice to have).
Experience in building high-load systems (nice to have).
Experience in the FinTech or e-commerce industry (nice to have).
Familiarity with prompt engineering or AI workflow tools (nice to have).
Experience working with LLMs, vector databases, or building AI agents (nice to have).