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Enterprise SaaS Platform Development

I build and maintain multi-tenant enterprise SaaS platforms that act as a central business hub, bringing CRM, ERP, product information, logistics, payments, identity, and customer portals together in one system instead of a dozen disconnected tools.

Production experience across a large-scale enterprise SaaS platform integrating HubSpot, ERP/order management, PIM systems, Shippit, Stripe, and Azure AD/SCIM.

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Specialty

Quote-to-Cash, beyond CRUD screens

The real complexity in an enterprise hub is the end-to-end workflow underneath it: a quote request becomes a quote, then a sales order, purchase order, shipment, payment, and invoice, with every step synchronized against external systems in real time. I've built and maintained that Quote-to-Cash pipeline, along with the REST, GraphQL, and background-job infrastructure that keeps it consistent with CRM, ERP, and logistics providers.

  • Quote-to-Cash workflow: quote → sales order → purchase order → shipment → payment → invoice
  • Two-way sync with HubSpot CRM and ERP/order management systems
  • Product information sync with PIM providers and Azure Cognitive Search indexing
  • PunchOut (cXML) support for procurement systems like SAP Ariba
  • White-labelled customer portals per tenant
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What you get
  • Multi-tenant SaaS architecture
  • REST, GraphQL & MCP APIs
  • Third-party integrations (CRM, ERP, PIM, payments, shipping, comms)
  • Background sync jobs (Hangfire)
  • White-labelled customer portals
  • PunchOut / cXML procurement integration
  • Role-based access & SSO
What's included

Modules & Integrations I Build

Quote-to-Cash automationCustomer & deal management (CRM sync)ERP order & purchase order syncProduct information & search indexingShipment booking & trackingPayment processingPunchOut / cXML procurement (SAP Ariba)Azure AD / SCIM SSO & user provisioningTransactional email & SMSAI-powered features
Good fit

Who This Is For

  • Businesses replacing multiple disconnected CRM/ERP/logistics tools with one platform
  • SaaS products that need to sync with CRM, ERP, or procurement systems
  • Multi-tenant B2B platforms needing white-labelled customer portals
  • Teams automating quote-to-order-to-invoice workflows end to end
Real work

Case Studies

Central Business Hub: Quote-to-Cash Platform

Large-scale, multi-tenant enterprise SaaS platform

Developed and maintained features across a large-scale, multi-tenant enterprise SaaS platform built on ASP.NET Core (ABP Framework) and Angular, serving as a central business hub in place of separate CRM, ERP, PIM, logistics, and identity systems. Worked on backend APIs, Angular features, third-party integrations, background jobs, domain logic, bug fixes, performance improvements, and production support across the platform's Quote-to-Cash workflow and its integrations with HubSpot, ERP/order management, product information systems, Shippit, Stripe, Azure Cognitive Search, and Azure AD/SCIM.

ABP FrameworkAngularHangfireGraphQLHubSpotStripe
Why work with me

Integration work is where enterprise SaaS platforms break: a sync job that silently drops a record, a webhook that fires twice, a PunchOut catalog that doesn't match what the procurement system expects. I've built and debugged these integration layers in production on a live Quote-to-Cash pipeline, not a happy-path demo.

Process

How I Work

  • Map the real data flow between every system before writing sync code.
  • Design background jobs to be idempotent and safe to retry.
  • Build REST, GraphQL, and MCP APIs against real consumer needs, not speculative ones.
  • Enforce role-based access and SSO consistently across modules and APIs.
  • Fix root causes in production, not just symptoms.
Toolbox

Stack & Technologies

ABP Framework.NET / C#ASP.NET CoreAngularEntity Framework CorePostgreSQLHangfireGraphQLOpenIddictAzure ADAzure Cognitive SearchStripeSendGridTwilioOpenAI
Common questions

FAQ

What kind of enterprise SaaS platforms have you built?

A large-scale, multi-tenant business hub unifying CRM, ERP, product information, logistics, payments, and identity into one platform, built on ASP.NET Core (ABP Framework) and Angular, with a Quote-to-Cash workflow running through it end to end.

Can you integrate our platform with a CRM, ERP, or procurement system?

Yes. I've built and maintained production sync layers with HubSpot CRM, ERP order/purchase order management, product information systems, and PunchOut (cXML) procurement integration for systems like SAP Ariba.

Do you handle REST, GraphQL, and AI-facing (MCP) APIs?

All three, depending on what the consuming client needs, including MCP APIs for AI-powered features.

Can you automate an end-to-end quote-to-invoice workflow?

Yes. I've built and maintained a full Quote-to-Cash pipeline (quote request → quote → sales order → purchase order → shipment → payment → invoice), kept in sync with external systems via REST APIs, webhooks, and recurring background jobs.

Can you add SSO and role-based access control for enterprise customers?

Yes, including Azure AD and SCIM-based identity and user provisioning, layered with role-based access control across modules and APIs.

Unifying CRM, ERP, and logistics into one platform?

If your business runs on disconnected CRM, ERP, and logistics tools that don't talk to each other, let's talk about what a single integrated platform, and the workflow automation behind it, would take to build.

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