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 .
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.

Freelance contract with immediate onboarding.
Stable and full time project with an international client.
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📌 Senior Java Developer (RxJava) | Freelance (Remote, 30-33€/h)
🏢 SQUAD Technology Solutions
📍 España