Niel  Miranda

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About

I build and maintain internal systems for regulated industries, focusing on HR, finance, compliance, and operations. Reliability and auditability are non-negotiable. Currently I work independently, delivering custom enterprise systems and helping organizations modernize legacy infrastructure.

Credentials:
Certified ScrumMaster2022
Certified Agile Developer2017
BS Information Technology2014

Systems Delivered

Case studies organized by system type.

Internal Platforms

Custom-built systems that power core business operations.

HRIS Deployment

Centralizing HR operations in a regulated hospitality environment

A major hotel and casino operation needed to unify employee management, payroll, and compliance tracking across departments.

Constraints
  • PAGCOR compliance requirements
  • Integration with legacy payroll systems
  • Real-time attendance synchronization
Architecture
  • Modular monolith with service boundaries
  • Dual-database strategy (SQL Server + Oracle)
  • Event-driven attendance updates
Impact

Full compliance adherence with centralized HR operations

Technologies
C#ASP.NETSQL ServerOracle

Tournament Management Platform

End-to-end casino tournament operations

Casino operations needed a unified platform for tournament registration, prize management, and payment processing.

Constraints
  • Payment gateway integration
  • Real-time player tracking
  • Regulatory audit trails
Architecture
  • Microservices for registration/payments
  • Event sourcing for audit trails
  • Real-time WebSocket updates
Impact

End-to-end tournament and payment processing

Technologies
C#VB.NETASP.NETPayment Gateways

Automation & Optimization

Systems that reduce manual work and improve operational efficiency.

Scheduling Optimization

23%

Demand forecasting for hospitality workforce scheduling

Hotel operations struggled with unpredictable schedule overruns, leading to labor cost overruns and staff burnout.

Constraints
  • Real-time prediction requirements
  • Integration with existing scheduling software
  • Interpretable recommendations for managers
Architecture
  • ML model for demand forecasting
  • Constraint-based optimization layer
  • Dashboard for schedule approval
Impact

23% reduction in schedule overruns

Technologies
C#Machine LearningSQL Server

Employee Meal Stub System

Biometric meal benefit validation

Hotel employees received meal benefits that were difficult to validate and track across multiple dining outlets.

Constraints
  • Biometric integration (fingerprint)
  • Offline-capable validation
  • Real-time reporting for HR
Architecture
  • Biometric authentication gateway
  • Offline-first validation cache
  • Centralized reporting API
Impact

Streamlined employee benefits distribution

Technologies
C#ASP.NETSQL Server

Shuttle Payment System

Transportation payment and reconciliation

Corporate shuttle fleet needed automated fare calculation, tracking, and financial reconciliation.

Constraints
  • Multi-route fare calculation
  • Integration with accounting systems
  • Automated reconciliation
Architecture
  • Fare calculation engine
  • Scheduled reconciliation jobs
  • API for corporate reporting
Impact

Automated payment processing and financial reconciliation

Technologies
C#VB.NETSQL Server

Interactive Form Builder

Dynamic form creation with real-time preview

A dynamic form builder showcasing modern React patterns with drag-and-drop field creation, validation, and live preview.

Constraints
  • Real-time preview
  • Form validation
  • Dynamic field rendering
Architecture
  • React hooks (useState, useReducer)
  • Custom form validation
  • Component composition
Impact

Reusable form builder component

Technologies
React.jsTypeScriptVue.js (simulated)

Legacy Modernization

Tools and systems for migrating and modernizing older technology.

COBOL-to-Java Converter

Source-to-source transpiler for legacy migration

Fortune 500 clients needed to migrate aging COBOL mainframe applications to modern Java EE architecture without losing business logic.

Constraints
  • Preservation of existing business rules
  • Minimized manual refactoring
  • Testing parity with original systems
Architecture
  • Source-to-source transpiler
  • Automated test generation
  • Pattern-based code transformation
Impact

Automated conversion of COBOL business logic to Java

Technologies
COBOLJava EEOracle

Core Work

A decade of building mission-critical systems across enterprise environments.

System Design

Architecting modular, maintainable systems that scale with business requirements and integrate cleanly with existing infrastructure.

Backend Engineering

Building robust APIs and services in C#, VB.NET, and Java that handle real-world workloads with predictable performance.

Data & Integrity

Designing data models and pipelines that ensure accuracy, support audit requirements, and maintain consistency across systems.

Automation

Creating CI/CD pipelines and automated testing workflows that reduce manual effort and catch issues before production.

Modernization

Incrementally replacing legacy systems with modern architectures while maintaining business continuity and data integrity.

Engineering Approach

1

Stability First

Production systems must be reliable. I prioritize clear error handling, graceful degradation, and comprehensive logging that helps diagnose issues quickly.

2

Maintainability Over Cleverness

Code is read more than it is written. I favor explicit patterns, thorough documentation, and code structures that make future changes straightforward.

3

Compliance by Design

Security and audit requirements shape architecture from the start. Data integrity, access controls, and audit trails are built into the system, not added later.

4

Incremental Modernization

Replacing legacy systems carries risk. I favor gradual, reversible changes that deliver value while preserving business continuity.

Labs & Experiments

Explorations in tooling, automation, and systems development.

Compiler Experiments

Explorations in source-to-source transformation and static analysis tools.

Frontend Architecture Lab

Component system experimentation with typed API layers, responsive layouts, and accessibility considerations.

Automation Scripts Collection

Personal tooling for development workflow optimization.

Internal Developer Portal Prototype

Exploration of platform engineering concepts.

Available for enterprise roles and remote engagements.

Available for enterprise roles and remote engagements.

Send an Email
Philippines (Remote)