Software Engineer (Java / Kotlin)

Allegro is the most popular shopping platform in Poland and the largest e-commerce platform of European origin. It operates a marketplace model with over 135,000 merchants and more than 250 million offers across key categories. The platform reaches 22 million customers monthly, offers fast and free deliveries under Allegro Smart!, and includes modern financial services and a wide pickup network.

• Code in Kotlin or Java with willingness to master Kotlin.
• Value high-quality code and engage in code reviews and engineering best practices.
• Excited about building new products and launching fresh projects.
• Open to developing soft skills through code reviews, pair programming, and retrospectives.
• Open to incorporating AI coding assistants for efficiency.
• Can find effective solutions to user requirements.
• Constantly develop and update knowledge.
• English at B2 level.
• 5 years of experience in a similar position.
• Knowledge of AI, Kotlin, Java, Spring, Kafka, Kubernetes, Microservices, BigQuery, Spark.

Nice to have:

• Experience with machine learning systems.

• Design, build, and optimize high-availability systems handling thousands of requests per minute.
• Work with a cloud-native tech stack: Kotlin, Spring, Kafka, Kubernetes, and ML.
• Take full ownership of microservices from design to deployment in an agile team.
• Tackle complex backend problems in distributed systems, data streaming, and algorithmic optimization.
• Build infrastructure for serving ML models using BigQuery and Apache Spark, integrated with microservices.