Senior Java Developer (RxJava) | Freelance (Remote, 30-33€/h)

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.

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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. xqbhyrx

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