Junior Backend Engineer: Scalable AI-Driven Data Systems

Synerise SA; Kraków; Hybrid; PLN 90,000 - 130,000; Full time

Job summary

Synerise SA is hiring a Junior Backend Engineer to join a production-grade, large-scale system used by enterprise customers worldwide. You will work on architecture, design patterns, and performance optimisations for high-volume data processing.

The role emphasizes translating complex requirements into robust backend solutions, with a strong focus on learning JVM languages, web frameworks, and distributed systems.

Qualifications

• Experience with JVM languages and backend development.
• Basic experience with at least one web framework.
• Familiarity with SQL or NoSQL databases.
• Experience using AI coding tools is a plus.

Responsibilities

• Develop architecture and design patterns to process and store high volume data sets.
• Develop software with a core focus around optimisation and performance.
• Translate complex functional and technical requirements into detailed design.
• Perform analysis of vast data stores and uncover insights.

Skills

Java

Scala

Kotlin

Rust

Web frameworks

SQL

NoSQL

AI coding tools

Tools

Claude Code

Cursor

GitHub Copilot

Job description

Synerise SA is hiring a Junior Backend Engineer to join a production-grade, large-scale system used by enterprise customers worldwide. You will work on architecture, design patterns, and performance optimisations for high-volume data processing.

The role emphasizes translating complex requirements into robust backend solutions, with a strong focus on learning JVM languages, web frameworks, and distributed systems.