Solution Architecture
System design, technical decisions, modernization paths, build-vs-buy analysis and vendor evaluation for business-critical systems.
SOLUTION ARCHITECTURE · CLOUD · SYSTEMS INTEGRATION
I work across solution architecture, cloud and systems integration.
I’m currently Senior Technology Manager at Sanum Holdings. My background spans software development, AWS and GCP, backend services, identity, APIs, automation and technical leadership, and I still stay close to implementation.
FOCUS
I stay close to implementation, even when the work starts with architecture.
Cloud & Backend
AWS, GCP, Python, REST APIs, SQL, serverless workloads, containers, CI/CD, IAM, monitoring and production troubleshooting.
Systems Integration
Dynamics 365, HubSpot, Odoo, identity, e-commerce and third-party platforms connected through APIs, automation and data workflows.
Technical Leadership
Engineering teams, code reviews, technical priorities, delivery coordination, external vendors and incident resolution.
SELECTED WORK
Systems and projects that represent the work I actually do.
Public repositories are linked directly. Enterprise work is summarized without exposing private code, credentials or proprietary implementation details.
CURRENT · HEALTHCARE
Business systems, integrations & automation
Lead solution design and technical decision-making across ERP, e-commerce, operational workflows, internal applications, APIs and automation for a healthcare group.
Odoo · Shopify · PostgreSQL · APIs · Automation · Vendor coordination
GITHUB · CRM INTEGRATION
HubSpot ↔ Dynamics 365 / Dataverse integration
Designed a Python/Flask integration to synchronize contacts and related opportunities between HubSpot and Dataverse. Matching uses normalized email with phone fallback; ambiguous matches are surfaced as conflicts instead of selecting a record arbitrarily. Configuration is kept separate from mapping logic, writes use conservative retry behavior, and incremental reverse sync uses Cloud Storage checkpoints. Sanitized portfolio reconstruction of an enterprise integration originally developed in 2025, with proprietary mappings, credentials and business rules removed.
HubSpot APIs · Dataverse/OData · Entra ID/OAuth 2.0 · Python/Flask · Cloud Run · Scheduler/OIDC · Cloud Storage
ENTERPRISE · IDENTITY
Centralized identity architecture
Designed centralized authentication with Azure AD B2C and SAML for 35,000+ users, enabling secure access and third-party platform integrations.
Azure AD B2C · SAML · Identity · Integrations
ENTERPRISE · AWS
Serverless user onboarding
Designed and implemented a bulk onboarding backend using AWS Lambda and EventBridge, supporting 5,000+ users and reducing manual onboarding effort by approximately 70%.
AWS Lambda · EventBridge · API workflows · Serverless
GITHUB · GCP
Cloud Run scalability & load testing
FastAPI service deployed to Google Cloud Run to test concurrent traffic and compare scaling behavior across concurrency, minimum instance and CPU configurations.
Google Cloud · Cloud Run · FastAPI · Docker · k6
GITHUB · BACKEND
FastAPI + PostgreSQL REST API
Backend project with REST endpoints, relational persistence, validation, automated tests and a Docker-based development environment.
Python · FastAPI · PostgreSQL · SQLAlchemy · pytest · Docker
EXPERIENCE
Experience across software development, cloud, technical leadership and architecture.
My roles have changed, but the common thread has been owning technical problems from design through delivery and production support.
Senior Technology Manager
Lead technology initiatives across business systems, cloud services, integrations, automation and internal development. Own solution design, coordinate internal and external delivery, evaluate technical alternatives and remain hands-on when implementation or troubleshooting requires it.
Lead Full Stack Developer
Led and mentored a 10+ person engineering team while working on AWS cloud-native workloads, centralized identity, CI/CD, monitoring, automation and production reliability.
Technical Team Lead
Led technical delivery across GCP data and application workloads, including Data Fusion, BigQuery and Cloud Functions, with additional support for AWS environments and junior engineers.
IT Manager
Led the IT function across infrastructure, applications, databases, internal systems and technical support, while managing a four-person technical team.
Software Developer
Built internal KPI and reporting systems, automated performance workflows and contributed to a customer-facing Dialogflow chatbot on Google Cloud.
Software Engineer
Worked on internal web applications, business systems, databases, Linux environments and technical support after transitioning from an internship into a full-time engineering role.
CONTACT
Want to discuss a technical role or project?
I’m open to senior hands-on roles, solution architecture, integrations, cloud/backend work, technical leadership and selected consulting engagements.
gerardo.lpz23@gmail.com ↗