ZHEN.
Full-stack software development for teams that have outgrown spreadsheets and off-the-shelf tools. We design, build and operate the systems that carry your inventory, your sales and your reporting, from schema to deployment.
Every engagement ships with documentation, tests and a handover your own team can maintain.
Four commitments that shape the architecture before a single line of production code is written.
Replace spreadsheet sprawl with one accountable system of record.
We map the workflows people actually follow, then collapse the manual hand-offs between them into a single auditable pipeline. Approvals, stock movements and reconciliations stop living in inboxes.
Turn transactional noise into decisions leadership can defend.
Every module we ship emits clean, queryable events. That gives operators live dashboards, finance a reliable close, and executives forecasting that traces back to source records rather than a pasted export.
Migrate off brittle stacks without pausing the business.
Legacy replacement fails when it is a big-bang cutover. We wrap the existing system behind a stable interface, move capability by capability, and keep both paths verifiable until the old one is genuinely unused.
Infrastructure that grows with load instead of breaking under it.
Containerised services, infrastructure as code and observability from day one. Environments are reproducible, deploys are boring, and capacity scales with demand rather than with an emergency purchase order.
End-to-end engineering, from the first schema sketch through to the support that keeps a live system running.
Line-of-business systems built around how your team actually works, not around a vendor template.
Inventory & POS · ERP modules · Workflow automation
Learn moreFast, accessible, responsive applications on the modern React and Next.js stack, shipped production-ready.
Next.js App Router · Design systems · Performance budgets
Learn moreAndroid applications for the jobs that happen away from a desk, built to stay readable and fast in the field.
Android builds · Offline-first flows · Device integration
Learn moreMicrocontroller hardware reporting into a dashboard you can actually act on, with mapping and alerting built in.
ESP32 firmware · Telemetry pipelines · Geomapping & alerts
Learn moreSchemas that stay correct under load, with the indexing, migrations and backup strategy planned from the start.
PostgreSQL & MySQL · Migrations · Backup & recovery
Learn moreData models, service boundaries and deployment topology designed to survive the next order of magnitude.
Schema design · Cloud infrastructure · Scalability reviews
Learn moreReliable connections between the platforms you already pay for: payments, logistics, accounting and more.
REST & GraphQL · Payment gateways · Third-party sync
Learn moreInterfaces designed around the task at hand, so the people using the system all day are not fighting it.
Design systems · Accessibility · Prototyping
Learn moreMonitoring, patches and responsive fixes after launch, so a live system keeps doing its job.
Bug fixes & patches · Monitoring · Feature updates
Learn moreOn-site work for the physical layer software depends on: cameras, biometric devices and the network they all run on.
CCTV installation · Biometric systems · Network setup
Learn moreSystems already built and running. Each one can be deployed as-is or adapted to the way your organisation works.
Unifies warehouse stock, point-of-sale terminals and finance reporting into one real-time operational picture for multi-branch retailers.
Employee records, attendance and leave handled in one place, with the approval chain that sits on top of them.
Resident information, requests and issued documents kept in one searchable record for barangay operations.
Student records, enrolment and academic data in a single portal, with separate access for staff, faculty and administration.
Reservations tracked end to end, from first enquiry through to a confirmed booking, against a live availability calendar.
ESP32 sensor units reporting live water levels to a central dashboard, with every station plotted on a map.
Farm machinery, bookings and returns kept reconciled, so availability on the screen matches availability in the yard.
Android scoreboard for live game scoring, built to stay legible on a courtside display at a distance.
Biometric terminals feed straight into daily time records, with tardiness and overtime computed automatically instead of tallied by hand.
Systems designed, built and deployed for enterprises, local government, schools and field operations.
A full-featured management dashboard that unifies warehouse stock, point-of-sale terminals and finance reporting into one real-time operational picture, built for multi-branch retailers who had outgrown spreadsheets.
Every receipt, transfer and sale adjusts on-hand quantities across all branches within seconds, with full movement history per SKU.
Margin, velocity and basket analysis by product, branch and cashier, sliced across any date range without exporting anything.
Barcode-driven terminals post directly into the ledger, with offline queuing that reconciles automatically once connectivity returns.
Reorder points computed from live sales velocity trigger notifications and draft purchase orders before a line item runs dry.
Cost of goods, gross margin and period-close reporting derived from the same transactions the floor staff create.
Granular permissions per branch and per role, with an immutable audit log covering every price and quantity override.
Human resource management system covering employee records, attendance and leave, with the approval flows that sit on top of them.
Reservation platform with availability calendars, guest details and booking status tracked end to end, from enquiry through to confirmation.
ESP32 sensor units reporting live water levels to a central dashboard, with every station plotted on a map and threshold breaches raising alerts.
Working prototype for the Ormoc City Cooperatives Development Office, bringing each cooperative's accreditation, trainings, financial assistance and compliance records into one auditable dashboard.
Records and transaction management for barangay operations, keeping resident information, requests and issued documents in one searchable system.
Student records, enrolment and academic data managed in a single portal, with role-based access for staff, faculty and administration.
Equipment inventory, rental scheduling and return tracking for farm machinery, so units, bookings and availability stay reconciled.
Android scoreboard app for live game scoring, with period and timer control designed to stay readable on a courtside display.
Share the problem and the constraints. You will get a straight answer on scope, approach and timeline.