Must have

• Scala

• Java

• AWS

• Data base

• Data structures

• Algorithms

• English (B2)

Nice to have

• Rust

• Data Lake

• Spark

Requirements description

• 3+ years in professional software development
• Strong algorithms & data structures background
• Experience with databases, Data Lakehouse formats, or query engines ( Spark, Trino, DataFusion) is a plus
• Fluent in English, proactive, and team-oriented

Offer description

Important:  This opportunity is open only to candidates who are currently based in Barcelona or those who are willing to relocate and work in a hybrid format with regular visits to the office!

We are looking for a strong Backend Engineer to join an international product company building its own high-performance technology that accelerates data-intensive workloads through advanced, multi-dimensional indexing.

This role is a great fit for an engineer with a solid foundation in algorithms, data structures, and distributed systems. Instead of typical client–server application development, you will be working on the core of a data storage and indexing system, designing and improving the engine that optimizes how large datasets are organized, queried, and accessed at scale.

Some facts about the company:

They grew out of the Barcelona Supercomputing Center — a team with a scientific background that has truly achieved impressive results in accelerating data processing.

They already have strong clients — their analytics and ML models became dozens of times faster.

Recently, they raised $7.6M in funding, so they are actively growing and expanding their team.

If you're passionate about low-level problem-solving, performance optimization, and pushing the boundaries of how data systems work — this is the right place.

Your responsibilities

1. Build and enhance our indexing tech in Java, Scala, and Rust
2. Add support for open table formats like Apache Iceberg
3. Improve performance, fix defects, and create robust testing frameworks
4. Collaborate in a highly skilled, international, startup-driven team