ERR.MARX
SYSTEMS ARCHITECT · RELIABILITY ENGINEER
I design backend platforms with a focus on stability, scalability, and failure recovery. Every system is a set of interacting components with clear boundaries.
ABOUT ME
Chief Information Officer | Systems Architect
I design backend platforms with a focus on stability, scalability, and fault tolerance. My work centers on predictable behavior under load, resource constraints, and recovery from failure.
I model systems as interacting components with defined interfaces, data flows, and operational constraints — keeping architecture observable and maintainable as complexity grows.
System Design & Architecture
Distributed · Offline-first · Event-driven · HA
Engineering Philosophy
Observability-first · DDD · GitOps · Zero Trust
Backend & Platform
SOA · AuthN/Z · Real-time · Data modeling
DevOps & Infrastructure
Docker · K8s · CI/CD · Terraform · Multi-region
Data & Systems
PostgreSQL · NoSQL · Redis · Search · Kafka
Technology Stack
JS · TS · Node · Express · Next.js · Expo · Flutter · Python
SKILL_NODES
A curated map of the technologies and disciplines I work with—spanning full-stack web, mobile, infrastructure, and the systems thinking that ties them together.
Section 06 · condensed — don't overflex
I build systems by principles, not by tools. My work is guided by how systems should behave—resilient, observable, scalable, and humane—rather than what stack happens to be popular. System design, engineering philosophy, backend platforms, DevOps, and data systems all follow this foundation. Tooling is chosen to serve these principles, never to define them.
System Design & Architecture
Core identity
- Distributed systems design
- Offline-first architecture
- Event-driven systems
- Microservices & modular monoliths
- API design (REST, GraphQL, gRPC)
- Scalability & high availability
- Failure-resilient system design
Engineering Philosophy & Methodologies
How work gets done
- Observability-first engineering
- Infrastructure as Code (IaC) mindset
- GitOps & continuous delivery
- Domain-Driven Design (DDD)
- Resilience over perfection
- Security by design (Zero Trust)
- Performance & cost tradeoff optimization
Backend & Platform Engineering
Services & runtime
- Service-oriented architecture
- Authentication & authorization systems
- Real-time systems & messaging
- Data modeling & storage strategy
- Caching & performance optimization
DevOps & Infrastructure
Delivery & operations
- Containerization (Docker)
- Orchestration (Kubernetes)
- CI/CD pipeline design
- Infrastructure as Code (Terraform)
- Monitoring & logging systems
- Cloud architecture (multi-region, failover)
Cloud platforms: Amazon Web Services · Google Cloud Platform
Data & Systems
Persistence & movement
- Relational databases (PostgreSQL)
- NoSQL systems
- Caching layers (Redis)
- Search systems
- Event streaming (Kafka)
VAULT
SYSTEMS_VAULT
A comprehensive veterinary practice management system. Handles patient records, appointment scheduling, billing, and pharmacy inventory with queue-based workflows and real-time updates.
An analytics and reporting dashboard for veterinary clinics. Surfaces operational metrics, patient trends, and revenue data through an interactive visualization layer.
A practice examination platform with real-time scoring, adaptive question delivery, and performance analytics. Built for high-concurrency with strict session integrity.
An indoor wayfinding system for large and complex venues. Uses BLE beacons to provide real-time navigation and location-based services.
An offline-first mobile app for disaster response coordination. Enables communication, resource tracking, and volunteer management in connectivity-challenged environments.
A crowdsourced transit platform mapping Metro Manila's informal network — jeepneys, UV Express, tricycles, ferries. One-tap commuter reports are corroborated, weighted, and decayed into the country's first live ground-truth dataset, with anonymized flow data licensed to MMDA, DOTr, and LGUs.
A platform-agnostic SDK for offline-first peer-to-peer data sync. Devices reconcile directly over LAN, BLE, or Wi-Fi Direct when offline, then settle with an authoritative server on reconnect. Pure-TypeScript core with pluggable transport adapters — vector clocks for causality, HMAC-signed entries, and strict tenant isolation.
> INITIALIZING VAULT_STAGE_03...
STATUS: ASSETS_LOADED
ENTITIES_LOADED: 7/7
> DEPLOYING SPATIAL_GRID
RENDER_LATENCY: 4.2ms
> WAITING_FOR_INPUT_
SYSTEM
OUTREACH
Initiate a direct uplink. All transmissions are logged and responded to within 24 hours.
> COMPANY: STAPPL_INC
> GITHUB: marx-wil
> LATENCY: 14MS
# INITIALIZING COMMUNICATION PROTOCOL...
# ENCRYPTION: AES-256-GCM / QUANTUM-LINK ACTIVE