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# Software Engineer (Data Engineering)

- **Company:** Smadex SLU
- **Location:** Barcelona, Spain (Remote available)
- **Salary:** €50,000.0 - €80,000.0
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Agile Methodology, Airflow, Amazon Web Services, Bash Shell, Big Data, Code Review, Directed Acyclic Graph (Directed Graphs), Information Engineering, Database Queries, Software Debugging, DevOps, Distributed Systems, Python (Programming Language), Machine Learning, MySQL, Redis, Scala (Programming Language), Software Engineering, Systems Architecture, Cloud Platform System, Data Ingestion, Apache Spark, Build Management, Containerization, Kubernetes, Low Latency, Machine Learning Operations, Data Pipelines, Docker, Jenkins
- **Published:** July 20, 2026
- **Apply:** https://www.adzuna.es/contact-us.html

## About the Role

+ 4+ years of experience in a software engineering or data engineering role building high-throughput distributed systems.
 + Deep Java or Scala Knowledge
 + Proven track record of designing, building, and optimizing batch pipelines using Apache Spark.
 + Advanced SQL knowledge and experience optimizing complex queries for performance
 + Strong analytical mindset with the ability to debug and monitor complex distributed systems in production.
 + Excellent communication skills in English (written and spoken)
What Will Make You Stand Out (Bonus Points):

 + Previous experience in the AdTech industry or working with Real-Time Bidding (RTB) ecosystems.
 + Experience working closely with Data Science or Machine Learning teams (understanding of Feature Stores and the ML lifecycle).
 + Familiarity with cloud environments, particularly AWS.
 + Experience with containerization and orchestration (Docker, Kubernetes).
Our Tech Stack

 + Languages: Java, Python, Scala and bash.
 + Frameworks: Spark
 + Databases: MySQL, Redis
 + Cloud & DevOps: AWS, Jenkins, Docker, Airflow

## Description

We're looking for a highly skilled Senior Software / Data Engineer who is passionate about big data architectures and excited by extreme performance challenges. Your success will be measured by your ability to design robust data pipelines, ensure ultra-low latency data serving, deliver high-quality features, and mentor the team while sharing and applying your knowledge effectively.
What will you do at Smadex?
You will dive into a dynamic environment, tackling short-cycle tasks such as implementing complex data ingestion services and assisting with Spark aggregation pipelines, following a "you build it, you run it" philosophy. You will be expected to participate in code reviews, learn from technical and architectural decisions, and collaborate in a fast-paced environment where every opinion counts., + System Architecture & Design: Design and build scalable, highly available data pipelines and serving layers bridging big data storage and real-time machine learning inference.

 + Feature Ownership: Develop and optimize features using Scala and Java to process massive amounts of data, aggregate it, and efficiently write it to our Redis Cluster.
 + Pipeline Orchestration: Design and manage complex data workflows and DAGs using Apache Airflow.
 + Mentorship: Guide and support junior members of the team, fostering a culture of engineering excellence and best practices.
 + Quality Assurance: Write clean, efficient, testable code and thoroughly test work locally and in a sophisticated staging environment.
 + Operational Excellence: Monitor deployments and help ensure the stability, reliability and performance of production systems.
 + Agile Collaboration: Collaborate with the team in an agile environment, participating in planning and reporting on progress.


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