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.#J-18808-Ljbffr

📌 Senior Java Developer (Rxjava) | Freelance (Remote, 30-33€/H)
🏢 SQUAD Technology Solutions
📍 Madrid