Enterprise-Grade Delivery

Expert Services Built for Scale & Performance

Full-stack development, database engineering, and third-party integrations — for new projects and improving software you already run.

Web & Mobile Development

React, .NET, PHP, Laravel, Flutter, native iOS & Android

Windows Desktop

WinForms, WPF, C#, VB.NET, .NET Core

Databases & Data

SQL Server, MySQL, PostgreSQL, MongoDB, cloud migration

Marketplace & Store APIs

Amazon Seller, Flipkart, eBay, Shopify, WooCommerce, Magento

Payments & Shipping

Razorpay, Stripe, PayPal, FedEx, Delhivery, Blue Dart

Existing Project Support

Bug fixes, improvements, and enhancements without a full rebuild

0

Projects Delivered

0

Client Retention

0

Years Experience

Dedicated

Support Team

Improve What You Already Have

You don't need a full rebuild to move forward. We help fix bugs, resolve errors, improve speed and usability, and add new capabilities to your existing application, project, website, portal, or mobile app — working with the codebase and systems you already run.

Discuss Your Project
What We Offer

Full-Stack Expertise, One Trusted Partner

Whether you're launching something new or strengthening what you already have — explore our core service areas, each backed by dedicated specialists and proven delivery frameworks.

Third-Party Integrations

Marketplaces, Payments & Shipping APIs

Connect your ERP, inventory system, or custom portal to external marketplaces and sellers — Amazon Seller Central, Flipkart, eBay, and more — plus payment gateways and courier APIs for complete multi-channel commerce workflows.

Marketplace & Seller Integrations

Link with external merchants and seller platforms so orders, listings, inventory, pricing, and fulfillment stay in sync — whether you sell on one marketplace or many. We build SP-API and seller-hub integrations with webhooks, scheduled sync jobs, and error handling for high-volume catalogs.

  • Product listing upload, bulk updates, and category mapping
  • Order import, status updates, and FBA / FBM workflows
  • Stock levels, repricing rules, and settlement reports
Amazon Seller Flipkart Seller eBay Etsy Walmart Marketplace Meesho Myntra SP-API

E-commerce Store APIs

Integrate your own online store or multi-vendor platform with WooCommerce, Shopify, Magento, BigCommerce, and custom carts — syncing products, orders, customers, discounts, and fulfillment from a central admin or ERP.

  • Two-way product and inventory sync across channels
  • Order webhooks, refunds, and customer data mapping
  • Multi-vendor commissions, payouts, and vendor dashboards
Shopify WooCommerce Magento BigCommerce Custom Cart REST / GraphQL

Payment Gateways

Integrate Razorpay, PayPal, PayU, Skrill, Payflow, CCAvenue, PayTM, Mobikwik, Stripe, and Authorize.net for secure online payments, subscriptions, refunds, split settlements, and webhook handling on marketplaces and stores.

Razorpay Stripe PayPal PayU CCAvenue PayTM Authorize.net

Shipping & Logistics

Connect FedEx, USPS, UPS, Blue Dart, Delhivery, DTDC, and India Post for shipping rates, label generation, pickup requests, and real-time delivery tracking — including marketplace order fulfillment and multi-warehouse dispatch.

FedEx UPS USPS Blue Dart Delhivery DTDC India Post
Microsoft & Security

.NET Stack & API Security Expertise

We work across legacy and modern Microsoft technologies — and help you add enterprise-grade security to any website, portal, or API.

Microsoft .NET & Legacy Web

Build new applications or improve existing ones in Classic ASP, VB.NET, C#, .NET MVC, .NET Core, .NET Web Forms, and .NET Blazor — including WinForms and WPF desktop software.

Classic ASP VB.NET C# .NET MVC .NET Core Web Forms Blazor

Security & API Protection

We help you add and configure JWT tokens, OAuth, CORS policies, CAPTCHA, CSP, rate limiting, IP whitelisting/blacklisting, API gateway rules, SSL/TLS, encryption at rest, and input validation.

JWT OAuth CORS CAPTCHA CSP Rate Limiting HTTPS / TLS
Why XtremeDevelop

We Don't Just Build Software — We Engineer Competitive Advantage

Our senior engineers average 8+ years of experience across enterprise and startup environments. Every project follows agile best practices with transparent communication, code reviews, and automated CI/CD pipelines.

  • Security-First Architecture

    JWT, OAuth, CORS, CAPTCHA, CSP, rate limiting, IP filtering, API gateway rules, HTTPS/TLS, encryption at rest, and input validation on every project.

  • Performance Obsessed

    Sub-second load times, optimized queries, CDN integration, and Core Web Vitals excellence.

  • Clean, Maintainable Code

    Documented APIs, test coverage, and handoff-ready repositories your team can own.

  • Existing Project Support

    Bug fixes, performance tuning, and feature enhancements for websites, portals, mobile apps, and desktop software — without rebuilding from scratch.

Delivery at a Glance

On-Time Delivery96%
Code Quality Score94%
Client Satisfaction98%
API Uptime SLA99.9%

New Build or Existing Project — We're Ready

Whether you need a Laravel API, a .NET microservice, a full Next.js platform, or help fixing and improving software you already run — our experts are ready to scope, estimate, and deliver.