AAt SQUAD Technology Solutions, an IT outsourcing company, we are building a small, agile team with a strong commitment to doing things right from the very beginning.

We are currently working with one of our clients to hire a Java Senior Developer with reactive programming for a project in the banking sector. ?

? What are we looking for?

- ? 8+ years of Java development experience, including Java 17/21, modern language features, concurrency, and high-performance backend systems.
- ☕ Strong expertise with Spring Boot, Project Reactor, RxJava, and CompletableFuture to build scalable and reactive microservices.
- ? Hands-on experience with gRPC & Protobuf, including streaming RPCs, interceptors, deadlines, and API/schema evolution.
- ? Solid background in Kafka, Redis, PostgreSQL, and MongoDB,



delivering event-driven and data-intensive applications.
- ☁️ Strong cloud experience on AWS (S3, IAM, Managed Kafka, container runtimes) and modern distributed architectures.
- ? Expertise in Docker, multi-architecture container images (amd64/arm64), CI/CD, and cloud-native deployment practices.
- ?️ Experience leading large-scale refactoring or migration projects in multi-module codebases, with strong communication skills and C1 English; Python knowledge is a plus.

? What are we offering?

- ? Freelance contract with immediate onboarding.
- ? Stable and full time project with an international client.
- ? 100% remote.

📌 Java Senior Developer FREELANCE - (remote, 30-33€/h) (España)
🏢 SQUAD Technology Solutions
📍 España