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$
USD
I will build amazon seller partner API integration
Saif Ullah
About this gig
Still managing orders and inventory by hand? Let's fix that.
Every hour you spend copy-pasting orders, manually updating stock, or chasing fulfillment status is an hour your competitors are scaling while you're stuck in spreadsheets.
I build SP-API integrations that run quietly in the background syncing orders, updating inventory, triggering fulfillments, and feeding your systems with real-time data from Seller Central. You stop touching it. It just works.
What I Build:
Order Management Automation: New orders flow instantly into your system (ERP, WMS, custom app). No polling, no delays, no manual entry.
Real-Time Inventory Sync: Stock levels update automatically across your sales channels. No more overselling. No more suppressed listings from stockouts.
Shipping & Fulfilment Triggers: Tracking info pushes back to the platform the moment a label is generated. Stay compliant. Keep your metrics clean.
Listings & Catalog Management: Update pricing, titles, availability, and attributes programmatically across hundreds of SKUs at once.
Reports API: Pull settlement reports, inventory snapshots, sales data, and FBA fees directly into your dashboards or accounting tools.
Respect third-party rights
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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
Do I need to give you access to my Amazon Seller Central account?
Yes, but only to the extent required for SP-API setup. You'll grant API permissions through Amazon's developer console using a restricted IAM role — you never share your login credentials. I'll walk you through the exact steps, and you stay in full control throughout.
My Amazon account is in a different marketplace (UK, EU, Canada). Can you still help?
Absolutely. Amazon SP-API is available across all major marketplaces including NA, EU, UK, Japan, and Australia. I've worked across multiple regions and can configure the integration for your specific marketplace or multiple marketplaces simultaneously.
I already have a partial integration built. Can you fix or extend it?
Yes — this is one of the most common requests I get. Send me your existing codebase or describe what's broken and I'll do a quick audit. Depending on the state of it, I'll either fix and extend it, or recommend a clean rebuild if the foundation is too unstable. Either way, I'll be upfront with you.
