Custom Admin Dashboards. Internal Back-Office Tools. Multi-Tier RBAC. Sub-15ms Atomic Operations. - Aleksandar Kuzmanovic offers many high-quality services. Growing businesses and scaling platforms quickly outgrow rigid, generic SaaS dashboards that charge predatory per-seat fees, lock down your data, and lack the custom business logic required for complex fulfillment, accounting, and user management. Key stats: <15ms Query execution, Multi-Tier RBAC security, 100% Transactional safety, Zero Vendor lock-in. Technologies: Next.js 16, React 19, TypeScript, Node.js, PostgreSQL, MySQL, Prisma, TailwindCSS v4, Docker, WebSockets, REST & GraphQL APIs. Contact: aleksandarkuzmanovic02@gmail.com.
Custom Admin Dashboards.
Internal Back-Office Tools. Multi-Tier RBAC. Sub-15ms Atomic Operations.
Growing businesses and scaling platforms quickly outgrow rigid, generic SaaS dashboards that charge predatory per-seat fees, lock down your data, and lack the custom business logic required for complex fulfillment, accounting, and user management.
I architect and build custom admin dashboards, internal operational tools, and B2B back-office portals tailored precisely to your operational workflows. Built with Next.js, Node.js, and relational databases (PostgreSQL, MySQL), my dashboards deliver instantaneous sub-15ms query speeds, granular role-based access control (RBAC), and real-time inventory synchronization.
As engineered on the Singitronic platform, these operational portals handle thousands of SKUs and order transactions with zero lag, atomic database locking that prevents overselling, live webhook integrations, and clean modular code that eliminates third-party platform dependencies.
From logistics tracking and custom customer relationship hubs to multi-tenant SaaS admin panels with audit logging, I deliver secure, responsive software your operations team will love using every day.
Growing businesses and scaling platforms quickly outgrow rigid, generic SaaS dashboards that charge predatory per-seat fees, lock down your data, and lack the custom business logic required for complex fulfillment, accounting, and user management.
Services & deliverables.
End-to-end.
Custom Operations Admin Portal
Full-featured web application with customized workflows, interactive data tables, and batch management tools.
Role-Based Access Control (RBAC) System
Granular user permission framework supporting unlimited custom roles, audit logs, and session management.
Real-Time Inventory & Order Sync Engine
Atomic transactional update handlers preventing stock discrepancies across physical and digital storefronts.
Automated Export & Reporting Suite
One-click CSV, Excel, and PDF document generation for invoices, packing slips, and domestic ERP synchronization.
Self-Hosted Production Deployment
Docker containerization with automated database backup routines and SSL encryption ready for your cloud of choice.
Why choose my custom admin dashboard architecture?
Multi-Tier Role-Based Access Control (RBAC)
Fine-grained permission matrices separating administrators, warehouse fulfillment staff, customer support agents, and external vendors with strict route and API level guards.
Sub-15ms Atomic Database Operations
Carefully indexed schemas and relational transactions that prevent race conditions and inventory overselling during simultaneous checkout and fulfillment spikes.
Live Webhooks & Event Processing
Real-time UI updates powered by WebSockets and webhooks for instant order notifications, stock status changes, and courier dispatch confirmations.
Faceted Technical Filtering & Search
High-speed database indexing allowing managers to filter through tens of thousands of SKUs, users, and transactions with instant results.
Custom ERP & Logistics Connectors
Native integrations with domestic and international ERP systems, payment gateways, postal tracking APIs, and automated PDF/CSV document generation.
Zero Per-Seat SaaS Taxes
You own 100% of the intellectual property and code. Scale your internal team to hundreds of operators without incurring exorbitant monthly seat fees.
My process.
Simple. Transparent.
Operational Workflow Mapping
We map your internal team roles, manual spreadsheets, fulfillment bottlenecks, and daily operational pain points.
Database Schema & RBAC Design
Architecting the relational tables, atomic transaction boundaries, and permission matrix.
Dashboard Interface Engineering
Iterative frontend build with Next.js, high-speed data tables, faceted filtering, and live notifications.
API & ERP Integration
Connecting payment gateways, couriers, inventory webhooks, and third-party accounting systems.
Deployment & Operator Training
Production deployment with role-scoped staff walkthroughs, performance validation, and automated database backups.
Technology Stack
Architecting operational autonomy.
Back-office tools are the nervous system of an enterprise. When operations teams are forced to navigate slow, clunky third-party interfaces with rigid workflows, daily fulfillment delays compound into significant customer churn and operational overhead.
On the Singitronic platform, our primary architectural objective was sub-15ms responsiveness and atomic transactional integrity. In high-volume eCommerce, multiple operators updating stock, processing cancellations, and dispatching orders simultaneously will cause data corruption without strict database isolation levels.
By pairing Next.js App Router with optimized Node.js SQL queries and indexed foreign keys, the admin interface feels instantaneous to use. Operations staff search, filter, and modify order batches without screen freezes or database deadlocks.
Building your internal tools on modern open web standards ensures your business remains sovereign, agile, and free from the compounding tax of proprietary SaaS licenses.
Common questions.
Clear answers.
- Why build a custom admin dashboard instead of using Retool or off-the-shelf SaaS?
- No-code tools like Retool are convenient for quick prototypes, but they scale poorly under high data volumes, charge recurring monthly per-seat licensing fees, and restrict deep database transaction control. A custom Next.js admin dashboard gives you 100% intellectual property ownership, zero per-seat fees, custom offline-first caching, and complete design freedom.
- How do you handle sensitive data and role permissions?
- Security is implemented at both the UI and database layer. Authentication uses encrypted sessions with HTTP-only cookies, while API routes verify cryptographic RBAC claims on every single query with full audit logging.
- Can the dashboard connect to our existing production databases without downtime?
- Yes. I design non-destructive database connection layers and replica read-pools that query your existing schemas safely without disrupting ongoing customer traffic.
- How responsive is the interface for warehouse and mobile staff?
- All dashboards are mobile-responsive with high-contrast UI and touch-friendly controls, allowing warehouse staff on tablets or mobile phones to scan barcodes and update order statuses seamlessly.
Ready to start?
Send a message and I'll respond within 24 hours with a clear plan for your project.