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I will build or improve a scalable ruby on rails web application
Zulqarnain
5.0
5.0
About this gig
Need a reliable Ruby on Rails developer to fix issues, add features, or scale your web app?
I'm a Ruby on Rails specialist with 10+ years of experience helping startups and businesses build stable, secure, and scalable Rails applications, whether it's a quick fix or a full upgrade.
What can help you with
- Bug fixes & error resolution
- Feature and module development
- Backend APIs & third-party integrations
- Performance optimization & database tuning
- Code cleanup, refactoring & Rails upgrades
- Admin panels & dashboards
- Deployment support
- Test coverage setup (RSpec / Minitest)
Why clients choose me
⭐ 10+ years of real-world Rails experience
⭐ Clean, maintainable & production-ready code
⭐ Clear communication & fast turnaround
⭐ GitHub PRs, documentation & transparent changes
I work on existing Rails applications and new builds, always following best practices and scalable architecture.
Message me before ordering so we can review your requirements and timeline and make sure were aligned.
Get to know Zulqarnain
Zulqarnain
Professional Freelancer and Full Stack Developer
- FromPakistan
- Member sinceMar 2020
- Avg. response time1 hour
- Last delivery3 months
Languages
Urdu, English, Hindi
Hi, I'm Zulqarnain, a Senior Software Engineer and Data Scientist helping startups and businesses build scalable applications.
I specialize in full-stack development using React, Next.js, Ruby on Rails, Node.js, and React Native. My expertise includes UI/UX design, database architecture (PostgreSQL, MongoDB, Supabase, Firebase), REST APIs, and performance optimization.
I focus on clean code and delivering solutions that create real business impact.
Message me to discuss your project.
My Portfolio
FAQ
Do you work with existing Ruby on Rails projects?
Yes, I specialize in working on existing Rails apps. I can fix bugs, add new features, refactor code, and improve performance without breaking existing functionality.
Can you fix urgent bugs or errors?
Yes. I handle urgent issues and can often fix critical bugs the same day, depending on the complexity.
Do you need access to my code?
Yes, I usually work via GitHub, GitLab, or Bitbucket. If needed, I can also use zipped project files or limited access environments.
Can you help with deployment?
Yes, I can deploy your Rails app on Heroku, AWS, Cloudways, Render, or VPS. I also help fix deployment issues and improve server setup.
Do you write tests for new features?
Yes, I use RSpec or Minitest for test coverage on new features and critical components to ensure long-term stability.
What if I’m not sure which package to choose?
No problem! Send me a message with what you need. I’ll review your requirements and recommend the best package—or create a custom offer.
Can you upgrade my Rails or Ruby version?
Yes, I can safely upgrade your app to the latest stable Rails and Ruby versions, including fixing deprecated code, gem issues, and dependency conflicts.
Do you work long-term or on monthly support?
Yes, I offer ongoing maintenance, feature development, and code improvements for long-term clients. Custom retainers are available.
Reviews
1 reviews for this Gig
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Rating Breakdown
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A 
arasheed93
United Kingdom
Zulqarnain is a very skilled and reliable developer. He understands requirements clearly, communicates well, and delivers work on time. Most importantly, he is honest, professional, and committed to quality. I had a great experience working with him and would definitely recommend him for future projects.
Up to $50
Price
1 day
Duration
Helpful?
Reviews
1 reviews for this Gig
| (1) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
A arasheed93
United Kingdom
Zulqarnain is a very skilled and reliable developer. He understands requirements clearly, communicates well, and delivers work on time. Most importantly, he is honest, professional, and committed to quality. I had a great experience working with him and would definitely recommend him for future projects.
Up to $50
Price
1 day
Duration
Helpful?
