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Data engineer at consultancy Aubay Spain to support, maintain and evolve a large DataHub platform: building scalable Scala/Spark/Hadoop pipelines, ensuring data quality, and driving a Hadoop-to-cloud migration (Kubernetes, COS, Spark/Airflow as a Service). Hybrid role (50% remote) based at the Madrid Río offices.
Krell Consulting is hiring a full-stack analyst-programmer with 3+ years of web development experience to build applications end-to-end: Java/Spring Boot backend, Angular frontend, REST API design, PostgreSQL data modeling, and GitLab CI/CD with production support. Remote from Spain, salary up to 29K EUR, English C1 required.
Senior full stack engineer building VOICEB.ai's autonomous AI voice-agent platform: backend services, APIs, integrations (Salesforce, HubSpot, Twilio, SIP/WebRTC) and internal tooling. Remote within Spain, owning features end to end on a small team with the CTO, using a modern JS/TS stack (React/Node) on AWS/GCP.
Designs and builds complex batch and streaming data pipelines (Python, SQL, Spark) for a global data platform on AWS and Databricks, working with Lakehouse architectures (Delta Lake/Iceberg/Hudi), CDC/upsert strategies, and Airflow orchestration. Hybrid role in Madrid for a data engineer with 4+ years of experience.
Senior full-stack engineer at engineering-services firm FERCHAU Spain, joining a long-term international project: developing and maintaining distributed applications using .NET/.NET Core microservices, REST APIs, an Angular front-end, Kafka-style event-driven architecture and NoSQL databases, applying SSDLC and software security practices.
Senior Data Engineer for an international client project building a global data platform on AWS and Databricks: designing batch and streaming pipelines with Python, SQL and Spark, implementing Lakehouse architectures (Delta Lake, Iceberg, Hudi), CDC/upsert strategies and Airflow orchestration. Hybrid role in Madrid with 3 days remote.
DevOps engineer specialized in GitHub Actions and CI automation: migrating repositories to GitHub, onboarding applications, and building reusable CI pipelines/workflows alongside client dev teams. Core stack: Git/GitHub, GitHub Actions, Docker/OCI, Maven/Gradle/npm builds, SonarQube quality gates. Permanent contract, 100% remote in Spain.
Fully remote SIEM & Security Data Engineer at Capitole Consulting, joining an international cybersecurity project. Day to day: integrating and normalizing security logs into SIEM platforms, building parsers, defining detection use cases, and automating pipelines with Python/Bash, cloud (AWS/Azure/GCP), Kubernetes and IaC tools.
Senior full stack developer for a long-term, 100% remote tech project: building and maintaining Angular web apps (including real-time data features) and integrating them with Java/Spring Boot services, REST APIs and microservices, with some UX/UI involvement. Requires 8+ years of Angular; Docker, Kubernetes and data-viz skills are a plus.
Hybrid (50% office/50% remote) full stack role in Madrid building Java and Angular applications on modern microservices and event-driven architectures. Day to day: backend services in Java (JDK 8, valued JDK 17), Angular 16–20 frontend, Kafka/RabbitMQ/ActiveMQ messaging, PostgreSQL/Oracle, Docker, and automated testing in Scrum teams.
Develops and maintains software services for an IoT platform serving the energy and industrial sector, designing scalable AWS cloud architectures, integrating REST APIs and backend services, and collaborating on connected devices, sensors, and fleet management alongside firmware/hardware teams. Core stack: JavaScript/TypeScript, React, AWS.
Data engineer/analyst role in Tres Cantos, Madrid (hybrid, 3 days onsite) focused on developing and maintaining ETL and data integration processes with Pentaho. Day to day: extract, transform and load data, validate and treat data, and analyze and resolve data-related incidents. Requires 2-3 years of data experience plus Pentaho and SQL skills.
Data Engineer focused on data products who operationalizes advanced AI/ML models into reliable, high-quality data products for a leading European retail company's Digital Hub. Day-to-day work centers on building scalable batch and real-time pipelines with Python, SQL, Databricks, Spark, and Airflow on GCP/Azure, plus data modeling, observability, and model drift monitoring.
Mid-level backend engineer at Flanks, a Barcelona-based fintech startup, designing and maintaining Python data pipelines and backend services that aggregate clients' financial assets for wealth managers. Work centers on ETL/ELT pipelines, SQL/NoSQL query optimization, testing, and Docker/CI-CD deployment.
Java backend engineer on a hybrid Madrid-based team at IT-services multinational UST, designing, developing, deploying and monitoring cloud-native Spring Boot microservices. Day to day: CI/CD with GitLab/Jenkins, containerization with Kubernetes, Docker and Helm, and Kafka-based event-driven integrations in an Agile/DevOps environment.
Full Stack Developer building and evolving microservices-based applications with Java, Spring Boot, and Angular. Day to day involves Kafka streaming, Kubernetes, MySQL/Oracle databases, automated testing with Cucumber and Selenium, observability with OpenTelemetry and Elastic Stack, all in a Scrum team environment.
Full stack developer working 100% remotely (with occasional meetings in Madrid) building and maintaining applications using Oracle PL/SQL, .NET (C#), and Azure DevOps CI/CD. The role also applies AI-assisted development tools like GitHub Copilot and Cursor for legacy code analysis, code generation, and refactoring.
On-site DevOps Engineer in Madrid who designs, automates and maintains scalable cloud infrastructure: writing Ansible playbooks, provisioning with Terraform/Terraform Enterprise on IBM Cloud, building CI/CD pipelines (Jenkins, GitLab CI, GitHub Actions), and handling monitoring, patching and N3 incident response. Requires 3+ years in DevOps/cloud/sysadmin roles.
Hybrid (50% office / 50% remote) Java backend developer role in Madrid at Realnaut, Axpe Consulting's cloud-native brand. Day to day: designing microservices architectures, building event-driven services with messaging platforms (Kafka, RabbitMQ), optimizing APIs, and deploying containerized apps on Kubernetes/OpenShift with automated testing in agile teams.
Build and optimize high-performance Java/Spring backend services for a sports betting and gaming platform, including integrating a new feed supplier and developing a cashier module for platform cash flow. Remote role in Spain, working in an Agile SAFe environment.
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