Qinshift
Middle Java Engineer (Kotlin)
QinshiftSpain3 days ago
Full-timeEngineering, Information Technology
This is us

At Avenga, we believe that human creativity empowers technology that matters. Operating globally, our 6000+ specialists provide a full spectrum of services, including business and tech advisory, enterprise solutions, CX, UX and Ul design, managed services, product development, and software development.

This is the job

We are looking for Middle Java Engineer with strong knowledge in Java and Kotlin, available for minimum 50%. The goal is to build a unified, scalable ads platform. We are transforming a long-standing business application into a modern technology stack. Our goal is to build a modular monolith designed for scalability and future microservices separation. We follow hexagonal architecture and Domain-Driven Design (DDD) principles to ensure clean, maintainable solutions.

This is you

  • A Middle Java Engineer with 3–5 years of professional experience
  • Strong knowledge of JVM technologies, including modern Java and modern Kotlin
  • Experience in AdTech, ideally with DSP (Demand-Side Platform) development
  • Good communication skills and a proactive approach English level: Upper-Intermediate

Nice-to-have Skills

  • Previous experience working with high-load systems
  • Understanding of system design principles
  • Familiarity with cloud platforms
  • Experience collaborating with Senior, Principal Engineers, or Architects Ability to work in fast-paced and dynamic environments

This is your role

  • Contribute to the development and optimization of AdTech solutions
  • Work with modern Java/Kotlin within JVM-based architectures
  • Collaborate closely with senior engineers, tech leads, and architects
  • Participate in technical discussions, propose solutions, and improve system performance
  • Ensure high-quality code delivery and follow best engineering practices

At Avenga, everyone matters. We provide equal opportunities in recruitment, career development, and leadership, regardless of race, ethnicity, gender identity, sexual orientation, disability, age, religion, or any other characteristic. We are committed to fostering a work environment where our diverse community of employees, candidates, and business partners actively shapes our growth. By bringing together people from different backgrounds and experiences, we build a workplace where everyone feels free to be themselves while honoring the boundaries of others.

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