Middle Java Engineer (Kotlin)

Avenga; Comunidad Valenciana; Presencial; EUR 40.000 - 60.000; Jornada completa

Descripción de la vacante

A global tech company is looking for a Middle Java Engineer in Spain to build a unified ads platform. The ideal candidate has 3-5 years of experience and strong skills in Java and Kotlin, particularly in AdTech. Responsibilities include developing solutions with modern JVM architectures and collaborating with senior engineers. This role promotes a diverse and inclusive work environment.

Formación

• 3-5 years of professional experience as a Middle Java Engineer.
• Strong knowledge of JVM technologies including modern Java and Kotlin.
• Experience in AdTech, ideally with DSP development.

Responsabilidades

• Contribute to the development and optimization of AdTech solutions.
• Work with modern Java/Kotlin within JVM-based architectures.
• Collaborate closely with senior engineers and tech leads.

Conocimientos

Java

Kotlin

AdTech

English (Upper-Intermediate)

Communication skills

Descripción del empleo

This is usAt 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 UI design, managed services, product development, and software development.

This is the job

We are looking for a 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.