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$
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I will ruby on rails developer for saas, apis, and e commerce integrations
Saif Ullah
About this gig
You have a product idea, a half-built app, or a feature your current team can't get to. You need someone who can just build it. I've spent 5+ years writing production Rails code for real businesses. Not tutorials. Not side projects. Real systems handling Amazon, eBay, and Shopify at scale, multi-tenant SaaS platforms, government-compliant invoicing tools, and warehouse automation.
WHAT YOU GET:
- Clean, tested Rails code following Rails conventions (not cowboy patterns)
- PostgreSQL database design with proper indexing and migrations
- Background jobs and webhooks handled correctly with Sidekiq
- Third-party API integrations that don't break when the API burps
- Hotwire/Turbo for reactive UI without the JavaScript overhead
- Docker deployment on DigitalOcean or your own server - Clear handover with documentation you'll actually understand
IDEAL FOR:
- Non-technical founders who need an MVP built properly
- Businesses that need a custom internal tool
- Teams that need a specific Rails feature or API built
- Agencies with Rails work they need to outsource
Message before ordering. I'll tell you exactly what's possible and what it'll cost.
Get to know Saif Ullah
Saif Ullah
Rails and NET developer for SaaS eCommerce and API integrations
- FromPakistan
- Member sinceJul 2019
- Avg. response time1 hour
Languages
Urdu, English
I'm a full stack developer with 5 years of production experience — not side projects, actual shipped systems.
I work daily in Ruby on Rails, C# .NET, and Flutter. On the Rails side that means multi-tenant SaaS, POS systems, Sidekiq jobs, and API-heavy backends. On the .NET side, WinForms, WPF, WinUI 3 desktop apps, QuickBooks SDK, hardware integrations.
Right now I work remotely for a Manchester eCommerce company building shipping automation and warehouse tools. Amazon SP-API, Shopify, eBay - I've integrated them all in production.
Clean code. Honest timelines. I actually reply.
My Portfolio
FAQ
I already have an existing Rails app. Can you work with it?
Yes, and honestly most of my work is exactly this. I'll review your codebase before we start, flag anything that could cause problems, and work within your existing conventions. If something needs refactoring first, I'll tell you upfront so there are no surprises mid-project.
What happens if the scope changes after we start?
Scope changes happen, especially on MVP projects where requirements become clearer once you see something working. I don't penalize you for thinking clearly. If the change is small, I absorb it. If it's significant, we agree on a scope adjustment before I proceed.
How do I know the code won't fall apart after you deliver it?
The systems I've built are running in production today, some for years. I write code that follows Rails conventions, which means any competent Rails developer can pick it up after me. I'll also walk you through what was built, how it works, and where to look if something needs changing.
