agru-gs

README.md



Founder · Identity & Security Engineer

  Designing identity systems, multicloud infrastructure, and enterprise software platforms.


Cloud & Infrastructure Platforms

  
Executive Profile
I am Agrufino Guzmán Gómez, a software engineer focused on identity systems, application security, cloud infrastructure architecture, and multi-tenant enterprise SaaS platforms.
My technical expertise and consulting background encompass the following disciplines:

Advanced Authentication and Authorization: RBAC/ABAC controls, Single Sign-On (SSO), OAuth2, and OIDC architectures for high-concurrency systems.
Identity and Access Management (IAM): Definition of explicit trust boundaries and strict server-side tenant isolation.
API and Microservice Security: Token signing and validation, signed webhook verification, replay attack mitigation, and rate limiting.
Payment Gateway Integrations: Secure transactional processing with Stripe, PayPal, Conekta, and Openpay (subscriptions, signed webhooks, and PCI-DSS tokenization).
Multicloud and Hybrid Cloud Infrastructure: Workload design and deployment across Linux systems, global cloud providers, and PaaS/SaaS platforms.
Operational Reliability and Observability: Structured security event logging, auditable trails, and end-to-end operation tracing.


Important
I treat identity, authorization, and cloud security as foundational architectural boundaries—not features added after implementation.


Experienced Cloud Platforms & Services
1. Payment Gateways & Financial Integrations (Stripe / PayPal / Conekta / Openpay)

  
Architecture and secure integration of payment gateways for SaaS subscription models, e-commerce, and multi-tenant billing.

Stripe: Integration of Stripe Connect, recurring billing, signed webhook handling, subscription management, and customer portals.
PayPal: Payment processing via REST APIs, PayPal Checkout, subscription flows, and Instant Payment Notifications (IPN/Webhooks).
Conekta: Processing local payments (Credit/Debit cards, SPEI bank transfers, and cash payments at OXXO Pay stores), callback validation, and reconciliation.
Openpay (BBVA): Credit/Debit card tokenization, 3D Secure transaction processing, fraud prevention, and recurring billing.

2. Amazon Web Services (AWS)

  
Hands-on experience with AWS services for identity, storage, messaging, APIs, and resilient cloud infrastructure.

AWS Cognito: User authentication, federated identity provider integration, and session management.
AWS IAM: Least privilege policies, service roles, and secure delegation.
Amazon DynamoDB: NoSQL database design, single-table design, and auto-scaling persistence.
Amazon S3: Object storage with restricted access policies and server-side encryption.
Amazon SES: Transactional email infrastructure and deliverability management.
API Gateway & Lambda: Serverless architectures and managed API endpoints.

3. Cloudflare

  
Utilization of Cloudflare for DNS, Edge computing, application security, and Zero Trust architecture.

Cloudflare Workers & Edge APIs: Globally distributed low-latency compute.
Cloudflare R2: Object storage without egress fees.
Cloudflare Zero Trust & Access: Internal resource access control and identity policy enforcement.
WAF & DNS/CDN Protection: Web threat mitigation, custom security rules, and SSL/TLS management.

4. Microsoft Azure

  
Experience working with Azure services for enterprise identity, cloud applications, storage, and networking.

Azure AD / Microsoft Entra ID: Enterprise identity management and conditional access policies.
Azure App Services & Functions: Backend service hosting and event-driven execution.
Azure Blob Storage & Networking: Virtual networks, secure storage, and load balancing.

5. Huawei Cloud

  
Deployment and configuration of Huawei Cloud services for enterprise infrastructure.

ECS (Elastic Cloud Server): Provisioning and scaling of high-performance virtual instances.
OBS (Object Storage Service): Secure, distributed object storage.
VPC & Security Groups: Network isolation, enterprise subnets, and firewall rules.
ELB (Elastic Load Balance): Traffic distribution for scalable applications.
IAM (Identity & Access Management): Corporate credentials, groups, and access policy management.

6. IONOS Cloud

  
Provisioning of virtual and dedicated infrastructure in IONOS' European cloud platform.

IONOS Cloud Compute & Cloud Cubes: Enterprise instance deployment with guaranteed performance.
S3 Object Storage: Privacy-compliant, S3-compatible storage.
Virtual Data Center (VDC): Infrastructure orchestration via graphic data center designer.
IONOS Cloud Managed Services: Dedicated bare-metal servers and managed enterprise networks.

7. PaaS & Serverless Platforms (Vercel / Netlify / Railway / Neon)

  
Experience with modern PaaS platforms and serverless databases for rapid development cycles.

Vercel: Next.js/React deployment, Edge Middleware, and frontend delivery optimization.
Netlify: Continuous build management, Serverless Functions, Edge Rules, and security headers.
Railway: Backend container deployment, microservices, and databases with continuous integration.
Neon Database: Serverless multi-tenant PostgreSQL featuring database branching and autoscaling.

8. DigitalOcean & Linux Infrastructure

  
Linux server management and managed cloud services for staging and production environments.

Linux Administration: Advanced configuration of Linux distributions (Ubuntu/Debian/Rocky Linux), kernel hardening, SSH, IPTables/UFW, and process management.
DigitalOcean: Droplets, managed Kubernetes clusters (DOKS), Spaces Object Storage, and managed databases.


Core Technologies & Delivery Infrastructure
Financial Integrations & Payment Gateways

  
Payment Processing: PCI-DSS tokenization, recurring subscriptions, cash payments (OXXO), SPEI bank transfers, and secure webhook validation.

Cloud Providers & Cloud Infrastructure

  
Infrastructure, Containers & Linux Systems

  
Languages, Frameworks & Databases

  
Architectural & Security Principles

  
Explicit Trust Boundaries: Access is denied by default unless explicitly granted.
Tenant Isolation: Organization context is strictly established and validated server-side.
Durable API Contracts: Versioned, strongly typed interfaces to guarantee system stability.
Observability by Design: Structured security event logging for investigation and auditing.
Zero Exposed Code: Prioritizing system integrity by keeping internal project source code private and secure.


Official Contact & Links

GitHub: github.com/agrufino-gs
X (Twitter): @Opendex_Cloud


_{Agrufino Guzmán Gómez · Identity Engineering · Application Security · Multicloud, PaaS & Payment Integrations}