Freelancer profile translated to English.
Back to original languageAbout Ciré
Ruby on Rails Developer with over 7 years of experience assisting companies in building, stabilizing, and evolving their backend systems.
I specialize in Ruby on Rails APIs, performance optimization, and refactoring existing code. I step in when applications require cleanup, performance optimization, improved reliability, and simplified maintenance.
I have collaborated with startups, agencies, and SaaS teams to:
• Design and maintain robust Rails APIs
• Refactor large existing projects to reduce bugs and technical debt
• Improve performance through SQL optimization, caching, and background jobs
• Implement automated tests (RSpec) to secure production releases
• Configure CI/CD pipelines and Docker-based deployments
• Maintain Linux production environments
I work seamlessly remotely with international teams and adapt quickly to existing codebases.
Our typical engagements include:
• Ruby on Rails backend development
• API design and integration
• Refactoring existing applications
• Performance audits and optimizations
• CI/CD and DevOps support
If you are looking for a reliable senior Rails developer capable of delivering clean, production-ready solutions, please contact us.
French
Native or bilingual
English
Fluent
Can work on-site
Dakar (up to 50km)
Experience
- ATNOSRuby on Rails DeveloperDIGITAL AND ITJanuary 2022 - Today (4 years and 5 months)- Development and maintenance of scalable Ruby on Rails applications and APIs used by international teams.- Accelerated release cycles by implementing CI/CD pipelines with GitHub Actions.- Improved system stability through containerizing services with Docker and optimizing infrastructure (Linux, Nginx).- Enhanced code quality and team confidence by integrating automated tests into a vast existing codebase, reducing production bugs and enabling safer, faster feature delivery.- Monitored application performance and optimized bottlenecks by refactoring SQL queries, introducing caching strategies, and improving code structure.- Refactored code into more modular and maintainable components, improving readability and long-term scalability.- Supported front-end features with Vue.js, ensuring seamless integration of APIs and dashboard functionalities.- Effective collaboration across remote teams spread across multiple time zones.
- Enspirit SPRLSoftware Developer | Junior DevOps EngineerJanuary 2021 - December 2021 (11 months)Adding features to Open Source ruby gems built and maintained by the company. Use Helm on client projects to help improve the experience of deploying to Kubernetes clusters. Adding features and maintaining different client projects.
- beQbeRuby on Rails DeveloperJune 2020 - October 2020 (4 months)Spain• - Maintenance of an application under rails 3• - Development of an API (from scratch) with rails 6 and the integration of firebase for authentication. Dockerized App with full test coverage.
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Education
- Professional University Studies DiplomaUniversité Dakar-Bourguiba2011Ingénierie informatique
- Cisco Certified Entry Network TechnicianCISCO2013