I will build a custom business application on microsoft power platform

C
castlane
C
castlane
Malacki R

About this gig

When a spreadsheet stops being a file and starts being the system your business runs on, it becomes a liability. No permissions, no audit trail, no single version, and usually one person who understands it.


I build the application that should have replaced it.


Typical builds:

Job and project management systems

CRM and pipeline tracking

Quoting, costing and approval workflows

Client portals with secure external access

Mobile apps for staff working away from a desk


Built on Microsoft Power Apps and Dataverse, so it sits inside the Microsoft 365 your team already has. Proper data model, proper relationships, reporting that comes out of the box rather than being rebuilt every month.


I have replaced an industry-standard SaaS platform with a custom CRM and billing portal for a client, removing the licence cost entirely.


I am also a part-qualified management accountant. When a build touches quoting, invoicing or job costing, the logic underneath is right.


Message me with what the spreadsheet does and who depends on it before ordering. Scope and price get agreed before anything starts.

Get to know Malacki R

Malacki R

Power Platform Business Systems Developer

  • FromUnited Kingdom
  • Member sinceSep 2026
  • Avg. response time1 hour
  • Languages

    English, German
Microsoft certified Excel and Power Platform developer and part-qualified management accountant (CIMA), 6+ years building business systems. Most spreadsheet developers build what you ask for. I understand the numbers too, so forecasts, budgets, margin models and management reports are built right. Excel, Google Sheets, VBA, Apps Script, Power Apps, Power Automate, Power BI, Dataverse, SharePoint. New builds plus fixes to systems you already have. Recent work: custom CRM replacing off-the-shelf software, automation that scaled a workforce from 300 to 1,000, £150k annual cost removed.