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Synerise S.A.

Junior Backend Engineer

Synerise S.A. Show all offers
7000 - 9000 PLN
B2B
Hybrid
Junior
Kraków
Expires Oct 14, 2026
5 days ago

In short

Junior Backend Engineer role at Synerise S.

A. in Kraków. Responsibilities include developing high-volume data processing architecture, optimizing software performance, and analyzing data. Requires JVM language or Rust programming, web framework basics, SQL/NoSQL familiarity, and AI coding tool experience. Offers work on a large-scale system, technical challenges, and growth opportunities.

Keywords

JVM languages Rust SQL NoSQL web frameworks AI coding tools backend development data processing performance optimization distributed systems

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About the project

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Team members

Your 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.

Our requirements

  • Programming skills in any JVM language (like Java, Scala, Kotlin) or Rust, and a strong willingness to learn them quickly.
  • Basic experience with at least one web framework and an understanding of how web applications work.
  • Familiarity with SQL or NoSQL databases and basic database queries.
  • Hands-on experience using AI coding (e.g., Claude Code, Cursor, GitHub Copilot) as part of daily software engineering work.
  • Decent troubleshooting and analytical skills with a methodical approach to solving technical problems.
  • A passion for building tools and learning new technologies.
  • Strong analytical and communication skills.

Optional

  • Existing GitHub/Gitlab portfolio or personal projects.
  • Experience with microservices architecture.
  • Basic knowledge of AI/ML concepts.

What we offer

  • Work on a production-grade, large-scale system used by enterprise customers worldwide.
  • Real technical challenges around performance, data volume, and distributed systems.
  • Opportunities for continuous technical growth and deeper ownership over system design.
  • Support from experienced engineers and a strong engineering culture.
  • Influence on architectural and technical decisions within your team.

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Benefits

Published 2026-09-14
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