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SOFTWARE ARCHITECT · FINTECH & ENTERPRISE SYSTEMS

Structuring high-availability systems with resilient security.

Software Architect with 8+ years of expertise constructing distributed fintech topologies, modernizing legacy enterprise platforms, implementing OAuth2/OIDC under Keycloak federation, and scaling high-throughput .NET Core microservices inside regulated EU ecosystems.

40%Faster API responses
60%Fewer production incidents
8+Years in fintech & enterprise
01 / API Security & GatewayKeycloak OIDC / KrakenD
02 / Microservices Core.NET Core & Clean Arch
03 / Fiscal Compliancee-Invoicing / QR & SAF-T
04 / DevOps & ContainersDocker / Azure DevOps
Cloud architecture, DevOps & compliance

Services & Packages

Digital Foundation

Perfect for small businesses without a tech team

"I need a professional website, corporate email, and basic operating systems. I deliver everything working, with training included."

  • Professional website or custom web application
  • Corporate email and domain configured
  • Database with admin dashboard
  • Training so your team can use it independently

Scale & Automate

Perfect for growing businesses with manual processes

"My team wastes hours on repetitive tasks. I build systems that automate processes, give you control with dashboards, and prepare your infrastructure to scale."

  • Custom web system or API with backend and frontend
  • Automation of key manual processes
  • Real-time metrics and KPI dashboard
  • Integration with your existing systems
  • Cloud infrastructure ready to scale

Enterprise Architecture

Perfect for corporations with legacy systems and compliance

"My current system can't handle growth. I migrate you without stopping the business, implement enterprise security, and ensure regulatory compliance with zero downtime."

  • Architecture audit with detailed assessment report
  • Monolith-to-microservices migration with zero downtime
  • Enterprise security: authentication, API Gateway, encryption
  • Automated CI/CD pipelines with testing
  • Fiscal and regulatory compliance (e-invoicing, SAF-T)
  • High-availability infrastructure with 99.9% SLA
Jesús Jahaziel Higareda López - Software Architect
Jesús Jahaziel Higareda LópezSoftware Architect • Fintech Systems
Core Vision

Technical Judgment & Material Business Value

I do not buy into hype cycles or build systems for the sake of technology alone. Instead, I focus on building cost-effective software aligned with business requirements. My approach pairs structured design with clean decoupling of code to prevent vendor lock-ins and minimize operational maintenance overhead.

\"The goal of an architect is not to select a hyped framework, but to keep deployment and migration vectors open as long as possible.\"

Key Metrics

8+Years Exp. Enterprise
10+Core Microservices
99.9%Average SLA KPI

Architectural Pillars

Decoupled Edge Auth

01

We consolidate single-sign-on credentials in Keycloak and check signatures inside KrakenD Gateway, keeping deep endpoints simple and clean.

Incremental Migration

02

Substitute old systems slowly using the Strangler Fig pattern behind routing walls, safeguarding transactions from server outages.

Fidelity & Test Coverage

03

Author asynchronous testing matrices alongside Domain-Driven Design (DDD) to keep systems robust, preventing production regressions.

Professional Career

v1.2 // PERSISTENCE
CF
Apr 2022 - Present

Cofidis Portugal

Software Architect

The Business Hurdle

The core monolithic credit platform suffered from performance bottlenecks, tight legacy infrastructure dependencies, and lacked unified identity governance and load resilience under peak hours.

Architectural Solution

Designed and directed the migration of the monolithic legacy credit engine to a 10-microservice topology on .NET Core. Deployed OAuth2/OIDC identity control via Keycloak unified federation and API gateway proxy routing through KrakenD.

Core Quantifiable Outcomes

  • Achieved a 40% reduction in credit decisioning API response times for consumer channels.
  • Reduced production failures and critical incidents by 60% within 6 months of adding automated testing corridors.
  • Secured zero-downtime releases for sensitive daily transactions via structured Docker images and Azure DevOps pipelines.
  • Mentored engineering team members on Domain-Driven Design (DDD), Clean Architecture, and security patterns.
.NET CoreC#KeycloakKrakenDDockerAzure DevOpsClean ArchitectureDDDxUnit
SV
Oct 2020 - Mar 2022

Sovos (formerly Saphety)

Senior Software Developer

PX
Mar 2019 - Sep 2020

Paysimplex

Senior Software Developer / Team Lead

TE
May 2018 - Feb 2019

TE Connectivity

Full Stack Developer

TS
Aug 2016 - Apr 2018

TICSON

Full Stack Developer

YQ
Jan 2016 - Jul 2016

Yaquisoft

Junior Full Stack Developer

Stacks and architectures governed with expert mastership

Ecosystem & Capabilities

Architecture & System Design

Microservicios con .NET CoreDecoupled, high-performance, and horizontally scalable services.
Arquitectura Limpia (Clean Architecture)Strict isolation of business core logic from technical frameworks.
Domain-Driven Design (DDD)Precise delineation of business bounded contexts and clean structures.
Migración y Patrón Strangler FigGradual monolithic decomposition and migration with zero business downtime.

Security & API Gateways

Keycloak (OIDC / OAuth2)Identity federation, secure token flows, and role-based action management.
KrakenD API GatewayHyper-fast Ingress proxying, in-memory crypt signature validation, and traffic control.
JWT & Autorización de APIsEdge token authentication isolated completely from core application endpoints.

Backend Engineering

C# / .NET Core / .NET FrameworkEnterprise-grade, high-performance object-oriented programming.
Entity Framework / LINQ / T-SQLPerformant object-relational mapping, data access layer, and query optimization.
Testing Automatizado (xUnit)Asynchronous unit and integration test corridors minimizing production errors.
APIs REST / SOAP / OpenAPIRigorous REST schema creation, technical standards, and data interoperability.

DevOps & Cloud Environment

Contenedores (Docker / Kubernetes)Immutable portability and reproducible packaging of cloud service nodes.
CI/CD (Azure DevOps / Jenkins)Automated static analysis, continuous integration, and seamless deployment.
Microsoft Azure CloudCloud hosting leveraging PaaS clusters, serverless computing, and managed databases.

Databases & Frontend Stack

SQL Server / OracleRelational data modeling, advanced stored procedures, and index execution tuning.
JavaScript / Vue.js / DataTablesHighly reactive CRUD layouts, client-side state managers, and tabular visuals.

Pristine Standard Guarantee: All technologies are handled with strict decoupled guidelines (SOLID, DRY, KISS, TDD) and optimized for immutable cloud run pipelines.

PRODUCTION GRADE
Analytical writings on patterns, system resilience, and regulatory compliance

Technical Insights

Arquitectura de Software2026-06-14

The art of letting go: a human guide to dependency injection

Dependency injection is the practice of letting classes stop building their own collaborators and start receiving them from outside. This shift reduces tight coupling, improves testability, favors cleaner architecture, and makes software easier to evolve over time.

5 min2595
Prompt professional connection

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