GZL Temizlik is a live platform built for a business that runs both cleaning services and apartment and residential complex management in the Gemlik and Bursa area of Turkey. One system serves three different audiences: the customer looking for a service and requesting a quote, the resident following service charges and announcements, and the manager who runs everything from field staff to the cash book.

Context and requirements

When cleaning and property management are handled by the same team, the work quickly overlaps: a single building needs stairwell cleaning, service charge collection and an owners' meeting. Previously, quotes were handled by email and phone, staff schedules lived in spreadsheets and service charges were tracked in separate files. Property management in Turkey is also governed by the Condominium Law, so steps such as meeting notices, the resolution book, the annual operating plan and formal notifications have to happen in the right order and with evidence. The goal was to manage both lines of business in one data model, with each building strictly isolated from the others.

Solution and scope

Customer website

The corporate site presents 11 services on their own detail pages: home, office, deep cleaning, post-construction, apartment and stairwell, window, upholstery, warehouse and pool cleaning, plus lawn mowing and apartment/complex management. Visitors submit requests through the quote form or the booking page; quotes are numbered, generated as PDFs and sent by email. A dedicated landing page for property management, a public 20-chapter guide to apartment management, a blog, news, FAQ and privacy pages are also live.

Resident portal

After signing in, residents see only the data for their own unit: summaries of total charges, amount paid and outstanding balance, service charges by period, payment history, announcements and documents. They can also follow whether a meeting notice has been delivered and how they are registered to attend, check the status of their earthquake insurance policy, view a debt statement, open a request and download a PDF account statement.

QR-based issue reporting

A QR poster in the building opens a reporting form that requires no login. Only a category and a description are mandatory; photos are resized on the phone and uploaded immediately. Residents can report a problem in a common area without installing an app.

Admin panel

The panel has two main areas. The cleaning area covers customers and their properties, staff profiles, tasks, the work calendar and finances. Monthly schedules are generated from shift templates with conflict checks, and generating the same plan twice never duplicates records. Visit teams, visit order and job photos are recorded.

The apartment area covers everything a property manager needs throughout the year:

• Finance: service charges, FIFO-based collection, cash book, income and expenses, debtor list, statements and period locking.
• Operating plan and allocation: expense allocation to the cent, an approval chain, a check that budget and charges match, and heating cost allocation at 70 percent consumption and 30 percent floor area.
• Meetings and resolutions: meeting notices, attendance list, proxies, majority calculation, resolutions and statutory books.
• Document generation: PDF documents carrying the building's identity, document counters, retention classes and delivery records.
• Collections and legal: escalation stages, formal demand letters, enforcement document sets and legal case files.
• Building and maintenance: buildings, units, residents, inventory, equipment and lift inspections, contracts, insurance policies and an obligations calendar.
• Staff and handover: caretakers and staff, leave and personnel records, a 21-item handover protocol.
• Processes and data protection: an evidence-based process wizard, checklists, emergency cards and CCTV audit records.

Website content (services, quotes, bookings, messages), users, roles and permissions, sessions, files and the audit log are managed from the same panel.

Technical architecture

The system consists of three applications: a customer site built with Next.js and React, a separate Next.js admin panel and a Fastify API running on Bun. MySQL with Drizzle ORM forms the data layer, and Zod handles validation. Authentication uses JWT; every record is bound to a tenant and a building, so a manager can only access the buildings they are authorised for. Notifications and scheduled jobs run in a separate worker process.

Areas where mistakes are not acceptable, such as financial calculations, allocation rules, meeting majorities and document rules, are covered by 86 test files, including a regression scenario that runs a full year from budget to handover. Data migration from the previous version is repeatable and was carried out with data verification.

Most visible text on the site is read from site settings rather than code, so service copy can be updated without a new release. Pages are rendered on the server, and sitemap, robots.txt and llms.txt endpoints are in place for technical SEO.

Integrations

• Iyzico: online service charge payments with signed callbacks, double idempotency and reconciliation; payments stay closed until credentials are configured.
• SMS and WhatsApp: a consent-based notification queue with Netgsm and WhatsApp Cloud adapters.
• Email: quote, notification and account emails via Nodemailer.
• Cloudinary: image and media management.

Outcome

GZL Temizlik is live at gzltemizlik.com. Customer requests are recorded with a quote number and PDF, apartment finances are kept separate and auditable per building, and residents can see their balance and documents without calling the office. Because the team uses the platform in its own daily work, new requirements come straight from the field; selling cleaning products online is on the roadmap as the next phase.