Long-term B2B Contract | Remote within EU
We are looking for a deeply hands-on Senior Java Engineer who can provide technical leadership while continuing to design, build and ship production code. You will work across several backend services rather than being assigned to one isolated project. The environment consists of distributed, cloud-native systems, with Java as the primary language and Python used across parts of the wider platform.
You will collaborate closely with Product Owners, DevOps engineers and other development teams, helping shape technical solutions across multiple services and translating product requirements into scalable backend architecture.
Design, build and maintain scalable backend services and APIs, primarily in Java
Write production-quality code as a core part of your daily work
Contribute to Python services and codebases when required
Build and operate cloud-native services, primarily on AWS
Deploy and run containerised applications using Kubernetes and Docker
Work with DevOps engineers on CI/CD, deployment, scalability and reliability




Use data, analytics and operational insights to support technical decisions
Contribute to testing, documentation and continuous improvement throughout the SDLC
At least 5 years of professional backend engineering experience
Strong, recent and hands-on commercial experience with Java
Professional experience contributing to production Python codebases
Strong knowledge of AWS and cloud-native application architecture
Solid hands-on experience with Kubernetes and Docker
Good knowledge of SQL and relational databases
Practical experience with CI/CD pipelines and modern software-delivery practices
Strong understanding of testing, maintainability and production code quality
Professional working proficiency in English (C1+)
Experience with Azure alongside AWS
Knowledge of analytics, data-processing or event-driven systems
Training and professional-development budget

📌 Java|Python -Senior Backend Engineer (Barcelona)
🏢 Salve.Lab
📍 Barcelona