Ruby on Rails Developer

Job Summary

Ajackus is seeking an experienced Mid-Level Ruby on Rails Developer with 3–6 years of professional experience to contribute to end-to-end backend development, API design, integrations, and performance optimization for global clients. The ideal candidate will have a strong understanding of Ruby on Rails and experience with AI-assisted coding tools.

About the Role

At Ajackus, we build scalable, secure, and high-performing digital products for global clients across fintech, healthtech, AI, and enterprise technology. We are looking for an experienced Mid-Level Ruby on Rails Developer who can work on end-to-end backend development, API design, integrations, and performance optimization.

What You'll Do

• Develop, maintain, and enhance backend features using Ruby on Rails.
• Build RESTful APIs, background jobs, and third-party integrations.
• Break down product requirements into clear, actionable technical tasks.
• Collaborate with senior engineers on architecture and solution design.
• Work with relational databases (PostgreSQL/MySQL): schema design, migrations, query optimization.
• Troubleshoot and debug issues across backend systems and integrations.
• Participate in code reviews and contribute to improving engineering standards.
• Write unit and integration tests to ensure code quality and maintainability.
• Work closely with cross-functional teams including QA, product, UI/UX, and DevOps.

Requirements

• 3–6 years of professional experience building applications using Ruby on Rails.
• Strong understanding of Rails conventions, MVC architecture, and ActiveRecord.
• Experience working with relational databases and writing optimized SQL queries.
• Familiarity with background job frameworks (Sidekiq/Resque) and caching mechanisms.
• Ability to write clean, maintainable, well-tested code.
• Experience using AI-assisted coding tools (e.g., GitHub Copilot, Cursor, Claude Code, Codeium, Tabnine) to improve productivity and code quality.
• Strong debugging skills and ability to navigate existing/legacy codebases.
• Effective communication and collaboration skills.

Preferred Qualifications

• Exposure to frontend technologies (React/Vue) is a plus.
• Experience with AWS/GCP and CI/CD pipelines.
• Experience integrating payment gateways, third-party APIs, and external services.
• Understanding of secure coding practices and common vulnerabilities.
• Prior client-facing experience or involvement in solutioning for global teams.

Why Ajackus

• Work on mission-driven, global-scale products across modern tech ecosystems.
• High ownership, autonomy, and influence in architectural and technical decisions.
• Collaborative, transparent, and high-performance engineering culture.
• Opportunities to transition into lead architect roles, solution ownership, or cross-domain engineering.
• Continuous learning across diverse projects involving AI, automation, distributed systems, and more.