Software Engineer 2 (Java/Kotlin/Python) - Search Relevance

About the job: In our domain, we work at the heart of Allegro’s user experience, focusing on what matters most to millions of shoppers every day: search relevance. We are dedicated to ensuring that every search query instantly connects buyers with the best, most accurate offers from a catalog of hundreds of millions of products. Building and scaling a search engine of this magnitude is a unique engineering challenge rarely found on the market.

Our architecture bridges two dynamic worlds: high-performance, low-latency online services built on Java and Kotlin, and an advanced offline processing and Machine Learning ecosystem powered by Python, Apache Airflow, and Google Cloud Platform. In this role, you will work beyond standard backend CRUD services. You will collaborate closely with research and data science teams to deploy ranking models, build automated evaluation pipelines powered by Large Language Models, and experiment with Generative AI and semantic search features.

If you are a backend engineer looking to expand your horizons into real-world AI and ML at massive scale, this team offers the perfect launchpad. Important things for you: Flexible working hours in the hybrid model (4/1) - working hours start between 7:00 a.m. and 10:00 a.m.

We also have 30 days of occasional remote work. The salary range for this position depending on the skill set is as follows (contract of employment, tax-deductible cost): PLN [phone] Annual bonus based on your annual performance