ENTERPRISE CORE PLATFORMS & MODERNIZATION
Custom ERP, Core Banking engines, and strangler-fig legacy monolithic modernization engineered with strict ACID transaction ledgers and zero downtime by ZAVA Systems.
Web Engineering Capabilities & Stack
Custom Enterprise ERP & CRM Engines
Bespoke enterprise resource planning, logistics, and customer relationship platforms tailored to your exact business rules, replacing rigid off-the-shelf software with zero vendor lock-in.
- Multi-Entity & Multi-Currency Support
- Real-Time Supply Chain & Inventory Sync
- Role-Based Access Control (RBAC)
Core Banking & Financial Gateways
High-availability financial transaction engines, double-entry ledger architecture, and payment gateways engineered for strict ACID compliance, fraud detection, and regulatory auditing.
- ACID-Compliant Double-Entry Ledger
- PCI-DSS & ISO 27001 Audit Ready
- Sub-second Settlement Pipelines
Strangler-Fig Legacy Modernization
Safely decompose monolithic, legacy codebases into high-velocity microservices incrementally. We guarantee continuous business operation without the risk of big-bang cutovers.
- Zero-Downtime Incremental Cutover
- Legacy Database Sharding & Mirroring
- Automated Rollback & Canary Routing
Every Engagement Includes
100% Code & IP Ownership
Full source code and intellectual property transferred to you. Zero vendor lock-in, ever.
Technical Documentation
Architecture specs, API references, and handover guides your team can actually use.
CI/CD Automation
Automated testing pipelines and zero-downtime deployments baked into every sprint.
24/7 Support & SLA
Uptime guarantee, proactive monitoring, and priority access to senior engineers.
Fragile Legacy Monolith vs. ZAVA Modern Core Platform
Why enterprises trust ZAVA to decommission risky legacy systems with zero downtime.
| Platform Dimension | Legacy Monolithic System | ZAVA Modern Core Platform |
|---|---|---|
| Modernization Strategy | ✖ Risky Big Bang Catastrophic cutover failure | ✔ Strangler-Fig Pattern Zero-downtime incremental migration |
| Data Integrity & Ledgers | ✖ Race Conditions Inconsistent locking | ✔ Strict ACID Ledgers Double-entry audit trails |
| High-Traffic Peak Scalability | ✖ DB Bottlenecks Crashes under spike load | ✔ 50,000+ Req/Sec Event-driven Kafka pipelines |
| Auditability & Governance | ✖ Fragmented Logs Incomplete compliance tracking | ✔ Immutable Audit SOC 2 / ISO 27001 audit-ready |
| System Agility & Maintenance | ✖ Fear of Deploying Months per minor release | ✔ Modular Services Continuous automated deployments |
Our Modernization & Core Methodology
A disciplined 4-stage engineering program delivering mission-critical core enterprise platforms.
Domain Discovery & Ledger Design
Business rule reverse engineering, entity-relationship mapping, and ACID transaction modeling.
📦 Deliverable: Core Data Spec & Domain ModelStrangler-Fig Modernization Plan
Designing API routing facades, dual-write synchronization, and incremental cutover milestones.
📦 Deliverable: Zero-Downtime Migration BlueprintCore Engine & Pipeline Engineering
High-concurrency backend services, real-time event streaming, and strict automated integration tests.
📦 Deliverable: Tested Core Production EngineIncremental Cutover & 24/7 SLA
Canary traffic routing, automated ledger reconciliation, legacy decommissioning, and 24/7 SRE monitoring.
📦 Deliverable: Live Enterprise Platform & 99.99% SLAFeatured Core Platforms
Mission-critical enterprise platforms engineered for high throughput and zero data loss.
Enterprise Multi-Warehouse ERP
Custom inventory & order management platform orchestrating 18 warehouses with real-time stock sync.
Core Banking Ledger & Settlement
ACID-compliant double-entry ledger handling 4,500 transactions per second with sub-second clearing.
Legacy Monolith Decomposition
Incremental 12-month migration of a 15-year-old monolithic system into Golang microservices with zero downtime.
Frequently Asked Questions
How do you guarantee zero downtime during legacy system modernization?
What database engines and transaction architectures do you deploy?
How do you maintain strict ACID compliance in high-concurrency systems?
Trusted by Enterprise Leaders
ZAVA Systems decoupled our 12-year-old monolithic ERP into modern microservices. We maintained 100% business continuity throughout the cutover, and transaction speed jumped 4x.
Their double-entry ledger architecture cleared our financial audit with zero discrepancies across 12 million transactions. Exceptional technical depth.
Unlike generic agencies that push off-the-shelf templates, ZAVA operates like an elite core systems engineering team. They delivered ahead of schedule.