Santosh S.

Hi, I’m Santosh Singh— a Senior Full-Stack Developer specializing in PHP, Laravel, SaaS, AI, and EDI integrations, with a 100% Job Success Score on Upwork. I help businesses build, extend, and modernize SaaS platforms, web applications, ERP/CRM systems, logistics software, e-commerce platforms, and custom business applications. I work with both new products and existing applications that need bug fixes, new features, API integrations, performance improvements, or ongoing development support. What I Can Help You Build PHP & Laravel Development Custom PHP and Laravel applications Laravel SaaS platforms REST APIs and backend systems Business portals and dashboards Application maintenance and modernization SaaS & Business Applications Multi-tenant SaaS platforms ERP & CRM systems Workflow automation Admin and management portals Subscription-based applications Logistics, TMS & WMS software AI Integration OpenAI API integration AI-powered business features AI chatbots and assistants AI document processing AI automation and workflows AI integration into existing SaaS applications EDI & B2B Integration EDI integration and automation AS2 connectivity X12 transaction processing EDI 204, 210, 214, 850, 856, 864, 940, 945 Trading partner integrations EDI/API/webhook workflows Full-Stack Web Development PHP | Laravel | MySQL React | JavaScript REST APIs Third-party API integrations Payment gateways Maps & GPS integrations Webhooks and external services Industry Experience 🚚 Logistics & Supply Chain — TMS, WMS, Fleet, Courier, Shipping & EDI 🏥 Healthcare — HMS/HIMS, EMR, Patients, Appointments & Billing 🛒 E-commerce & Retail — Online Stores, Marketplaces, Orders & Payments 👥 HR & Workforce — HRMS, ATS, Recruitment, Payroll & Timesheets 🏠 Real Estate — Property Management, CRM, Listings & Portals 💳 FinTech & Payments — Payments, Billing, Invoicing & Subscriptions 🏭 Manufacturing & Distribution — ERP, Production, Procurement & Inventory 📦 Warehouse & Inventory — WMS, Stock, Barcode & Fulfillment 🚗 Transportation & Fleet — GPS, Routing, Geofencing & Driver Apps 📚 Education & EdTech — LMS, E-learning, Assessments & Student Management ⚖️ Legal & Professional Services — Case Management, Portals & Workflows 🏢 SaaS & Business Platforms — CRM, ERP, SaaS & Business Applications 🏨 Hospitality & Booking — Reservations, Booking & Management Systems 🔧 Field Service — Work Orders, Scheduling, Technicians & GPS 🔗 B2B & EDI — AS2, EDI Transactions, APIs & Integrations How I Can Help ✅ Build a SaaS product from requirements ✅ Develop Laravel modules and business workflows ✅ Fix and improve existing PHP applications ✅ Integrate APIs, EDI partners and third-party services ✅ Add AI capabilities to new or existing applications ✅ Modernize and optimize legacy applications ✅ Work independently or alongside an existing development team I focus on practical, maintainable solutions that fit the actual business workflow. If you’re building a Laravel SaaS platform, AI-powered product, business application, or EDI integration, send me your requirements or existing application details. I’ll review the scope and suggest a practical development approach. 📩 Send me an invite or message to discuss your project. ------------------------------------------------------------------------------------- Keywords : Business Software — Business Application Development | Custom Software | SaaS Development | Web Application Development | Enterprise Applications Logistics — TMS | WMS | Fleet Management | Courier & Delivery | Shipping | EDI Healthcare — HMS | HIMS | EMR/EHR | Patient Management | Hospital Management E-commerce — E-commerce Development | Online Stores | Marketplace | WooCommerce | Order & Inventory Management FinTech — Payment Gateway | Stripe | PayPal | Payment API | Billing | Subscription & Recurring Payments HR & Recruitment — HRMS | ATS | Recruitment Software | Employee Management | Payroll | Timesheets EdTech — LMS | E-learning | Education Management | Student Management | Online Courses SaaS & Portals — Multi-Tenant SaaS | CRM | ERP | Customer Portals | Admin Portals | Workflow Automation Booking & Services — Booking Systems | Reservation | Appointment Scheduling | Field Service | Work Order Management API & Integration — REST API | Third-Party API Integration | Webhooks | System Integration | Data Integration Technology — PHP | Laravel | CodeIgniter | WordPress | WooCommerce | MySQL | JavaScript | React | Vue.js | AWS/Azure