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, Rx Java, and Completable Future to build scalable and reactive microservices. Hands-on experience with g RPC & Protobuf, including streaming RPCs, interceptors, deadlines, and API/schema evolution. Solid background in Kafka, Redis, Postgre SQL, and Mongo DB,



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