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Enrique Malpica CalderónEM

Enrique Malpica Calderón

Senior Software Architect & Fullstack Developer

€350/day
Madrid, ES
8-15 years
React Native (Expo SDK 53, New Architecture)
Quarkus (Java)
Docker, AWS
Stripe API
Spring boot

Average response time: 1 hour

Freelancer profile translated to English.
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About Enrique

I am a Software Architect and Fullstack Developer with over 9 years of experience in developing advanced technological solutions. I specialize in creating cross-platform applications with React Native and designing microservices architectures using Java/Quarkus and Spring Boot.

I have extensive experience in implementing integrated payment systems (Stripe, PayPal, Apple/Google Pay) and in effective deployments with Docker, as well as database optimization. I stand out for my ability to lead projects comprehensively, covering all phases: analysis, design, backend, frontend, infrastructure, testing, and final deployment.

  • Spanish

    Native or bilingual

  • English

    Conversational

Remote only
Primarily works remotely

Experience

  • Ministerio de Defensa
    Software Architect & Fullstack Developer
    DEFENSE AND MILITARY
    January 2016 - Today (10 years and 5 months)
    Madrid, Spain
    Software Architect & Fullstack Developer
    2016 – 2022

    • Architecture and development of critical applications in Public Administration environments, participating in the maintenance of monolithic applications in Java and JSF, as well as modernization towards microservices architectures with Spring Boot, Quarkus, Angular, centralized authentication with Keycloak, and service management through Eureka and Gateway.

    • Secure backend with Java/Quarkus: design and implementation of REST/GraphQL APIs with JWT/OAuth2 for authentication and access control.
    • Advanced frontend: development of web applications with Angular and JSF, and experience in modern frameworks like Next.js with SSR.

    • Infrastructure and deployments: automation with Docker Compose, deployments in Linux environments, Nginx configuration, system monitoring and optimization.
    • SQL Databases: PostgreSQL, MySQL, and Oracle, with experience in query optimization and ensuring performance and security in critical environments.

    • Desktop applications: development with JavaFX and Gluon, generating native executables (.exe) for desktop environments.
    • Management of internal repositories and libraries: creation of monorepositories with PNPM/NX, publication and management of internal libraries in Nexus and Verdaccio.

    • Testing and quality assurance: experience with JUnit 5, unit tests, and continuous integration.
    • Leadership and training: mentoring junior developers, leading development teams, and technical training in higher education programs (DAW).
    Languages & Frameworks: Java, Quarkus, Spring Boot, Angular, JSF, Next.js (SSR) Backend & APIs: REST, GraphQL, JWT, OAuth2, Microservices, Keycloak, Eureka, Gateway Architecture & Design: Critical application design, modernization of monoliths to microservices, application security Infrastructure & Deployments: Docker Compose, Nginx, Linux Databases: PostgreSQL, MySQL, Oracle
  • Freelance,
    Senior Software Architect & Fullstack Developer
    January 2016 - Today (10 years and 5 months)
    Alcorcón, MD, Spain
    • Architecture and development of critical applications in Public Administration environments, including modernization of legacy systems towards microservices architectures with Spring Boot, Quarkus, Keycloak, Eureka, and Gateway.
    • Backend development in Java (17, Quarkus, Spring Boot) and frontend with Angular and React Native, applying best practices in architecture, scalability, and security.

    • Design, optimization, and management of SQL databases (PostgreSQL, MySQL, Oracle), with a focus on performance and security.
    • Leadership of technical teams: mentoring junior developers and training in DAW higher education programs.

    • DevOps infrastructure and deployment management: Docker Compose, Nginx, Rocky Linux, AWS (RDS, S3, Billing), Firebase, Cloudflare, monitoring with Grafana, and advanced analytics with Amplitude and Firebase.
    • Featured project – PetCare Marketplace (iOS, Android, Web): developed from start to finish, including requirements analysis, architecture, backend and frontend, payment integration (Stripe Connect, Apple/Google Pay), OTP/SMS validation, and KYC. Advanced features such as real-time chat (Redis + GraphQL Subscriptions), coupons, and subscription management. AI integration (HuggingFace, Botpress) and full deployment in cloud environments.

    • Additional experience in native desktop application development with JavaFX and Gluon (.exe cross-platform), as well as in creating and managing monorepositories with PNPM/NX, publishing internal libraries in Nexus and Verdaccio.

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Education

  • BTech
    Technical Training Institute
    2021
    BTech
  • Higher Vocational Training
    Ministry of Defense
    2020
    FP Superior
Check out Enrique's education

Skill set

Languages & Frameworks: Java, Quarkus, Spring Boot, Angular, JSF, Next.js (SSR)
Backend & APIs: REST, GraphQL, JWT, OAuth2, Microservices, Keycloak, Eureka, Gateway
Architecture & Design: Critical application design, modernization of monoliths to microservices, application security
Infrastructure & Deployments: Docker Compose, Nginx, Linux
Databases: PostgreSQL, MySQL, Oracle

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