You're seeing this page as if you were . The main menu is still yours, though. Exit from immersion
Sergio Garcia GascoSG

Sergio Garcia Gasco

Java Backend Developer. Microservices. Springboot

€280/day
Valencia, ES
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
Back to original language

About Sergio

Java backend microservices developer**, specialized in the **Springframework.

Experience gained working withlarge and small companies**, both **product-basedand inconsultingenvironments. Notable clients include **ING**, **Grupo Bunzl, and Capgemini**, in sectors such as **banking**, **e-commerce**, and services. Participation in international and multidisciplinary teams, collaborating in the development of solutions applying **hexagonal architecture**, **DDD**, and design patterns.

Practical knowledge in cloud environments (**Microsoft Azure**), containers with Docker, Kubernetes, and OpenShift, as well as continuous integration and deployment (CI/CD) and test automation. Regular work under **agile methodologies**, with tools such as **Scrum, Jira, and Azure DevOps**.
  • Spanish

    Native or bilingual

  • English

    Fluent

  • Catalan

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • ING
    Backend Software Engineer
    March 2025 - October 2025 (7 months)
    Development of microservices with Java and Spring Boot, applying hexagonal architecture and DDD. Testing with JUnit, Mockito, and K6. Orchestration and deployment in containers using OpenShift and Kubernetes. Relational databases with Oracle, CI/CD with Azure DevOps, and Scrum methodology.
    Spring boot Java Hexagonal architecture Testing Microsoft Azure
  • Quirumed
    Java Backend Developer & Azure
    TECH
    January 2023 - March 2024 (1 year and 2 months)
    Development and maintenance of backend solutions in Java with Spring Boot and Spring Cloud Functions, applying hexagonal architecture and Domain-Driven Design (DDD) principles. Implementation of RESTful and SOAP APIs for integration between systems such as ERP Dynamics NAV, Magento 2, and external platforms (Amazon, Channable, Akeneo, etc.). Use of tools like Maven and Git, along with CI/CD in Azure cloud environments.
    Work with services such as Azure Functions (serverless), Service Bus, API Management, Logic Apps, Storage (NoSQL), and Application Insights (KQL) to ensure scalability, traceability, and efficiency. Development of batch processes and key automations for logistics and catalog management. Application of design patterns such as Factory or Strategy to maintain clean, flexible, and maintainable code. Agile methodology (Scrum) with Jira and technical support through Zendesk.
    Microsoft Azure Java Spring boot Domain Driven Design E-commerce
  • Capgemini
    Spring Backend & Angular Developer
    January 2023 - January 2024 (1 year)
    Development of evolutive and corrective changes for a client in the railway sector. Migration of a monolithic application to a microservices architecture. Technologies used: Spring boot, Angular, JPA

Recommendations

Be the first to recommend Sergio

Help this freelancer shine by sharing your experience working together.

These freelancer profiles also match your criteria

AgathaA

Agatha Frydrych

Backend Java Software Engineer

4.7

(3)

2

BaptisteB

Baptiste Duhen

Fullstack developer

4.6

(4)

5

AmedA

Amed Hamou

Senior Lead Developer

4

(2)

7

AudreyA

Audrey Champion

Web developer

4.3

(3)

4

Education

  • Computer Engineering
    Polytechnic University of Valencia (UPV)
    2022
    Grado de Ingeniería Informática con menciona en Computación y Machine Learning

Skill set

Categories