Middleware and central systems that feed several applications from a single source of truth, at public-sector scale.
System integration is feeding applications that run independently from a single source of data. GG Tech's System Integration & Central Platforms service builds that layer: the shared data model, the integration layer above it, the gateways to outside institutions, and a staged cutover that keeps the old system serving until the new one is ready. We do not sell a packaged product — our angle is the layer that connects the products you already run.
| Typical team | 1 architect + 2 developers + 1 tester |
|---|---|
| Calendar band | 8–24 weeks |
| Phase split | 20% current-state analysis · 30% shared data model · 35% integration layer · 15% staged cutover |
What grows the budget
Signs of underbudgeting
These are GG Tech Teknoloji planning bands, not a quote — we do not publish prices. Every project is different, so the bands are deliberately wide; they assume a senior, focused team and typical scope, and your project is estimated individually.
Current-state analysis
An inventory of the source systems: who owns which record, where the same data is written twice, and which integration already exists in a spreadsheet.
Shared data model
One model every application reads from, plus the mapping from each source system into it. The data dictionary is written here, not at the end.
Integration layer
The middleware itself: API contracts, idempotent writes, conflict rules, and the gateways to outside institutions.
Staged cutover
The new system is stood up on its own server and verified in a test environment while the old one keeps serving. The switch happens inside a planned window, with a rollback path that stays open.
What we deliver
Middleware and central systems that feed several applications from a single source of truth, at public-sector scale.
Our team combines domain expertise, modern engineering, and research-driven design to build solutions that scale. We work in focused sprints with clear milestones and measurable outcomes.
6
applications fed from one source
1
hour cutover window
0
minutes of downtime
Figures from the Çekmeköy Municipality central system, measured during the live cutover.
Read the case study: Çekmeköy BelediyesiProduct Strategy & Advisory
Market research, roadmap planning, and technical advisory to build the right product.
Mobile App Development
High-performance native and cross-platform apps for iOS and Android.
Web & SaaS Development
Cloud-native, multi-tenant SaaS platforms and modern web applications.
Custom Software Development
Tailored systems that go beyond off-the-shelf solutions.
MVP Development
Ship testable, market-ready products in 8–12 weeks.
App Modernization & Migration
Move legacy systems to modern architectures — better performance, lower maintenance.
Performance Optimization
Core Web Vitals, database tuning, and infrastructure improvements for slow apps.
IoT & Beacon Solutions
Indoor navigation, asset tracking, and connected device platforms.
Software Architecture & System Design
.NET backend architecture, the microservice-or-monolith decision, and a domain model that survives growth.
Database Engineering & Optimization
Schema design, index and query tuning on PostgreSQL and MS SQL Server — measured before and after.
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