Barcelona, Full-time, Hybrid

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Fledge
We are a boutique search firm connecting exceptional Talent with the most innovative companies and products that positively impact our societies. We present a tailor‑made solution between fine consulting and versátil Talent search process outsourcing:

Fractional Talent Acquisition Advisory
Recruitment operation tooling
On‑demand Talent Search

Company summary
Our client is a high‑growth European tech scale‑up on a mission to redefine how the world consumes. They believe in a collaborative economy where smart technology makes sustainable, second‑hand trade the global norm.
Operating as a major cross‑border marketplace in Spain, Italy, and Portugal, they manage a massive ecosystem with hundreds of millions of products. Their goal is to blend the trust of traditional classifieds with the seamless convenience of a modern marketplace.
In this role, you will:

You'll spend your time writing and maintaining clean,



scalable code in Java or Kotlin, depending on where your team’s focus lies.
You won’t just "code to spec", you’ll use Domain-Driven Design to build features that actually map to the real‑world problems we're solving.
You’ll help us modernize and refactor legacy parts of our system, ensuring everything stays healthy and performant as we grow.
You’ll help raise the bar for the whole team by creating solid testing strategies and participating in a code review culture that’s about mentorship, not just nitpicking.

For this job, you must:

Master our stack:

Kotlin & Java
Spring Boot & Ktor
Kafka & RabbitMQ
MySql, DynamoDB, Redis & RedShift
Docker
Solr & ElasticSearch
AWS: S3, ECS, RDS, Lambdas, CloudWatch, MSK, SES, CloudFront & more

You enjoy digging into complex technical puzzles and finding the most elegant way to solve them.
You have a quality-first mindset, but you’re also pragmatic—you know how to balance perfec

📌 Backend Engineer (Barcelona)
🏢 Fledge
📍 Barcelona