Custom web application for work order management, planning and invoicing at a nationwide locksmith company
About the project
Van Delft Slotenmaker is a family business providing 24/7 locksmith services across the Netherlands. With a growing team of field technicians carrying out dozens of jobs each day, the paper-based work order process became increasingly difficult to manage. Technicians filled in forms on location, planners had to call for status updates and the administration spent hours manually entering hours, products and customer details.
The Next App built a custom work order management system: an Angular web application with a NestJS backend that handles the complete process from job to invoice digitally. Each user group has its own interface tailored to their role: the field technician registers work on location, the planner monitors the schedule and the finance team processes invoices directly from the work order.
Features
5 roles
Field technician, planner, admin, finance and super-admin in one system
Paperless
From job to invoice fully digital
Direct customer communication from within the system
The challenge
Van Delft Slotenmaker was growing fast, but the operational process was stuck on paper. Technicians took work order forms to customers, planners only found out what had been done after the job was finished and administration lost significant time manually entering hours, products and customer details. With multiple technicians out on jobs simultaneously, real-time visibility into the schedule was practically impossible.
The approach
The Next App built an Angular application with five role-based interfaces. The field technician works through a step-by-step wizard: confirming customer details, registering activities, entering materials used and having the customer sign digitally. The planner sees the real-time status of all active jobs. The finance team converts work orders into invoices with a single click, generating them directly as a PDF or exporting them as Excel for the accounting system. A NestJS backend with Knex handles data storage and the integration with WhatsApp Business for customer communication.
Result
The work order system replaced all paper forms and separate spreadsheets. Van Delft Slotenmaker now handles the complete process from job to invoice in one application, with real-time visibility for all staff involved.
Digital
No more paper work orders, everything in the application
Real-time
Planner sees the live status of every job
Integrated
From work order to PDF invoice or Excel export in one step
Working with The Next App?
Want to build a custom work order system or field service app?
Technology
Veelgestelde vragen
The work order system is a custom web application built by The Next App for Van Delft Slotenmaker. It replaces paper work orders and supports the complete operational process: from creating a job by the planner to generating an invoice by the finance team.
Field technicians use a step-by-step interface on their phone or tablet. They register the work carried out, materials used and have the customer sign digitally. The planner monitors the schedule in real time and administration processes invoices directly from the work order.
The system has five roles, each with their own interface and access rights:
Yes. The Next App builds custom web applications and mobile apps for companies with field staff. We think along with you about workflows, role definitions and integration with existing systems such as accounting software or CRM.
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