Mohammad S.

Senior Ruby on Rails & Full Stack Developer with 10+ years of experience building scalable, secure, and high-performance web applications, SaaS platforms, REST APIs, and complex third-party integrations. I help startups and businesses build new products, improve existing applications, fix performance issues, and scale their systems using Ruby on Rails, Node.js, React.js, Angular, PostgreSQL, and MySQL. My focus is not just on writing code—I deliver clean, maintainable, scalable solutions that solve real business problems and are easy to maintain as your product grows. What I can help you with: Ruby on Rails application development SaaS product development REST API development & integration Third-party API integrations Payment gateway integrations React.js / Angular front-end development Node.js & Express.js development PostgreSQL & MySQL database development Application performance optimization Database/query optimization Background jobs & large worker processing Cache management Web scraping & data processing Legacy Rails application maintenance & upgrades Bug fixing, debugging & code refactoring TDD/BDD using RSpec I have extensive experience working with large datasets, background workers, caching strategies, database optimization, and performance-critical applications. I also have experience integrating Social Media APIs, Payment APIs, and various third-party services. I follow Agile/Scrum development practices and have worked with tools such as Jira, Trello, Basecamp, and Zoho. I am comfortable working independently as well as collaborating with distributed development teams. As a Senior Developer, I also have experience in team handling, code reviews, technical decision-making, application architecture, and mentoring developers. I believe in clear communication, reliable delivery, and building solutions that are stable, scalable, and aligned with business goals. If you need an experienced Ruby on Rails developer to build, maintain, optimize, or scale your application, feel free to send me a message. I’d be happy to discuss your project and suggest the best technical approach.