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Pablo CasasPC

Pablo Casas

Java, Kotlin, Spring, GraphQL Backend Developer

€115/day
Valladolid, ES
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Pablo

With almost a decade of experience in the technology sector, I have established myself as a Senior Developer with a versatile and pragmatic mindset, capable of transforming complex business challenges into robust and efficient technical solutions. My specialty: Kotlin and Java Ecosystem.
In recent years, I have specialized in modernizing architectures, leading the migration of low-latency microservices from PHP to Kotlin with Spring Boot. My focus is not only on code efficiency but also on performance optimization through the use of technologies such as Spring Batch, Spring Data, Redis, and GraphQL.
  • Spanish

    Native or bilingual

  • English

    Fluent

  • French

    Basic

Can work on-site
Valladolid (up to 50km)

Experience

  • ManoMano
    Senior Backend Developer in Kotlin and Java
    June 2022 - Today (4 years)
    Migration of low-latency microservices in PHP to new services in Kotlin, with Spring Boot, Spring Batch, Spring Data technology. Creation of microservices with Kafka technologies that use ChatGPT APIs to produce personalized experiences in the marketplace. Additional technologies: Redis, GraphQL. Deployments in Kong, with CI/CD set up with Terraform. Observability: Datadog.
    Kotlin Apollo GraphQL Java SQL Redis
  • Code Roasters
    Founding Member
    October 2025 - Today (8 months)
    Valladolid, Spain
    Development of AI automations for small businesses. Web development and design. Development of projects from scratch, from CRMs to more complex applications including sending WhatsApp/SMS or emails with customer information.
  • Corunet
    Senior Java Developer
    December 2021 - June 2022 (6 months)
    Creation of low-latency microservices in Kotlin, with Spring Boot, Spring Batch, Spring Data, Kafka technology. Additional technologies: Redis, GraphQL. Deployments in Kong, with CI/CD set up with Terraform. Observability: Datadog.

Recommendations

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Rocio Coll and 1 other person have recommended Pablo

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Education

  • Advanced Level Certificate in English Graph Developer - Associate Oracle Certified Associate, Java SE 8 Programmer First Certificate in English (B2) Graph Developer - Professional
    Certificado de Nivel Avanzado en Inglés Graph Developer - Associate Oracle Certified Associate, Java SE 8 Programmer First Certificate in English (B2) Graph Developer - Professional
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    Gregorio Fernandez
    2017
    Desarrollo de Aplicaciones Multiplataforma, Programación informática, aplicaciones específicas

Skill set

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