Senior Java and Kotlin Engineer at Avenga

Kragujevac, Central Serbia, Serbia -

Full Time

Start Date

Immediate

Expiry Date

12 Mar, 26

Salary

0.0

Posted On

12 Dec, 25

Experience

5 year(s) or above

Remote Job

Yes

Telecommute

Yes

Sponsor Visa

Skills

Java, Kotlin, REST APIs, Authentication Workflows, PostgreSQL, MongoDB, Cloud Development, GCP, Docker, Kubernetes, ETL Processes, Kafka, High-Performance Services, AdTech, English

Industry

IT Services and IT Consulting

Description

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 Senior/Principal 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 Strong experience with modern Java & Kotlin Expertise in REST APIs and various authentication workflows (key-based, OAuth) Knowledge of relational (PostgreSQL preferred) and non-relational databases (MongoDB preferred) Cloud development skills (GCP preferred) Experience with Docker, Kubernetes (nice to have) Familiarity with ETL processes, large data volumes, and streaming (Kafka or similar) Ability to build scalable, high-performance services in a cloud environment Experience integrating with Meta and TikTok (nice to have) AdTech experience is a strong asset English on C1 level This is your role Work with modern Java (17+) and Kotlin Collaborate on refactoring legacy code with a focus on quality and maintainability Write clean, testable code following SOLID and Clean Code principles Create and maintain unit and integration tests Cooperate with the front-end team to define API contracts Share knowledge within a team of 4 back-end developers and take ownership of your work What awaits you at Avenga? 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.

Responsibilities

The role involves working with modern Java and Kotlin, collaborating on refactoring legacy code, and writing clean, testable code. Additionally, the engineer will create and maintain unit and integration tests while cooperating with the front-end team.