Ryan Lopez
Building &
Scaling
Enterprise
Systems
Experience
.NET Software Architect & Full-Stack Engineer
Specializing in mission-critical ERP ecosystems, Microservices, and cloud-native architectures. From legacy monoliths to distributed systems.
Technical Leadership Built on Depth
Two decades of hands-on engineering and architectural leadership — transforming complex legacy systems into scalable, cloud-native platforms without disrupting ongoing operations.
Ryan Lopez
Senior Software Architect
Manila, Philippines · Remote
I am a technical leader who bridges the gap between complex business requirements and elegant software solutions. My expertise spans the full spectrum — from hands-on development to strategic architecture decisions that shape the direction of entire engineering organizations.
My core focus is on API-as-a-Contract principles — treating APIs not as implementation details but as first-class product agreements between teams. Combined with deep expertise in Domain-Driven Design and cloud-native architectures, this enables me to deliver systems that are maintainable, observable, and genuinely scalable.
From orchestrating eCommerce transformations and engineering high-volume SaaS platforms for Amazon FBA sellers, to leading enterprise scanning solutions across large corporates and government — I bring a practitioner's mindset to every architectural challenge.
Core stack
Microservices Design
Architecting distributed systems using industry-standard patterns — CQRS, Saga, Event Sourcing — to deliver resilient and independently deployable services.
Domain-Driven Design
Translating complex business domains into clean, maintainable bounded contexts aligned tightly with real-world processes and stakeholder language.
Strangler Fig Pattern
Incrementally modernizing legacy monoliths without big-bang rewrites — extracting microservices while keeping production stable.
Cloud-Native & API-First
Designing APIs as contracts between teams. Leveraging Azure, containerization, and CI/CD pipelines to deliver scalable cloud-native platforms.
Currently building
Re-platforming a high-volume Australian eCommerce operation from legacy ASP.NET Web Forms to Next.js + .NET 10 microservices — using CDC, Azure Data Factory, and an internal MCP server for AI-powered querying.
The Tech Stack Behind the Work
A curated toolkit built over 20+ years — chosen for reliability, scalability, and real-world enterprise performance.
Backend Engineering
Frontend Development
Cloud & Data
DevOps & Architecture
Testing & Quality
Architectural Impact Across Industries
Over two decades of solving high-stakes engineering challenges across sectors — each engagement sharpening a consulting-grade perspective on scale, decoupling, and long-term system health.
eCommerce & Retail Technology
Re-platforming Retail at Enterprise Scale
Serving as hands-on Software Architect for a high-volume Australian eCommerce operation — driving the full-scale modernization of a legacy ERP-integrated storefront into a cloud-native microservices ecosystem.
- Applied the Strangler Fig Pattern to safely decouple a monolithic ASP.NET Web Forms platform into independently deployable .NET 10 microservices — with zero disruption to live commerce operations
- Designed a real-time cloud data sync pipeline bridging on-premise ERP warehouses to Azure using Change Data Capture (CDC) and Azure Data Factory, eliminating data latency across the supply chain
- Pioneered an internal Model Context Protocol (MCP) server on the data warehouse, enabling AI-powered querying and intelligent business data consumption for operational teams
Enterprise ERP & Manufacturing
Engineering the Backbone of Operations
Delivered mission-critical ERP platforms for large-scale manufacturing environments where system downtime is measured in production loss — not inconvenience.
- Architected a comprehensive ERP system covering HR, Payroll, Inventory, and Sales — built ground-up to serve the complexity of high-throughput manufacturing operations
- Designed robust data visualization layers and reporting pipelines to surface real-time operational intelligence across production floors and management dashboards
- Led cross-functional delivery teams spanning development, QA, and business analysis, applying structured release management to high-availability systems
Financial Services & Fintech
Automating Trust in High-Stakes Systems
Engineered enterprise financial systems where correctness, auditability, and data integrity are non-negotiable — delivering automation across loan lifecycle management and executive risk tooling.
- Built an end-to-end loan application automation platform bridging SQL Server and Oracle DB infrastructures, eliminating manual processing bottlenecks across a major financial institution
- Developed executive-grade risk assessment and client satisfaction tooling integrated with enterprise document platforms — serving senior leadership and global client portfolios
- Prioritized cross-platform data integrity and audit-trail compliance at every architectural layer, meeting the strict governance demands of regulated financial environments
SaaS & Multi-Tenant Platforms
Scaling Multi-Tenant Architectures for Thousands of Users
Designed and scaled SaaS platforms serving thousands of concurrent business clients — solving the hard problems of tenant isolation, data security, and throughput at volume.
- Engineered a high-volume inventory management SaaS processing millions of marketplace records daily, with strict multi-tenant data isolation guaranteeing per-client security and performance SLAs
- Built and scaled a multi-tenant Site Builder CMS as a SaaS product, architecting a shared database layer capable of supporting concurrent, independent client environments
- Applied API-as-a-Contract principles across all SaaS boundaries, enabling reliable third-party integrations with major marketplace APIs and external commerce platforms
GovTech & Document Intelligence
Enterprise-Grade Delivery for Government & Corporate Scale
Led the architecture and delivery of document intelligence platforms processing millions of records annually for government departments and large enterprise clients — where precision and uptime are mandated.
- Spearheaded delivery of a government docketing and payment processing system for a state Department of Transportation, meeting strict compliance, performance, and auditability requirements
- Architected a suite of major corporate intranet and extranet portals handling high-volume document workflows — reducing manual processing overhead by over 60%
- Managed offshore and cross-functional delivery teams across development, QA, and business analysis to meet enterprise SLAs on mission-critical document infrastructure
Telecom & Enterprise Integration
Bridging Systems Across the Enterprise
Designed and delivered middleware and integration layers for telecommunications and enterprise environments — enabling disparate systems to communicate reliably at scale.
- Engineered a CRM middleware integration layer using enterprise service bus technology, enabling seamless cross-platform communication across a major telecommunications provider's core systems
- Delivered bespoke enterprise web applications across international markets — including government grant portals and field technician scheduling platforms — applying .NET Core and modern API architecture patterns
- Consistently applied clean integration contracts and service boundaries, laying the groundwork for decoupled, maintainable enterprise ecosystems long before microservices became mainstream
Career Timeline
Over two decades of delivering scalable, production-grade software across eCommerce, SaaS, enterprise, and government sectors.
Applied in Production
Not just theory — these patterns are actively deployed across real enterprise engagements.
CQRS
Command Query Responsibility Segregation
Saga Pattern
Distributed transaction coordination
Strangler Fig
Incremental legacy modernization
Event Sourcing
State from immutable event log
API Gateway
Single entry point for microservices
Credentials & Continuous Learning
Formal recognition of expertise and a commitment to staying at the forefront of software engineering, cloud architecture, and AI.
Azure Data Factory
Azure Data Factory for cloud-scale data integration and ETL pipelines — directly applied in designing the CDC-based ERP data sync at Voltex Electrical.
Azure AI Essentials Professional Certificate
Azure AI services, cognitive APIs, Machine Learning, and responsible AI principles. Practical integration of AI/ML capabilities into cloud-native applications.
Breaking a Monolith into Microservices
Decomposing monolithic applications into microservices using the Strangler Fig Pattern, service mesh architectures, and event-driven communication.
Microservices: Design Patterns
Industry-standard patterns including CQRS, Saga, Circuit Breaker, API Gateway, and Event Sourcing — applied across enterprise-scale distributed systems.
Software Design: Modeling with UML
UML modeling for software design — class diagrams, sequence diagrams, state machines, and use case modeling for complex enterprise architectures.
Comprehensive Guide to Software Architecture
Layered architecture, microservices, event-driven design, and architectural decision records for enterprise systems.
Lean Six Sigma Yellow Belt
Process improvement, waste reduction, and operational efficiency — actively applied to software delivery pipelines and team workflows.