Senior Java Engineer - Scalable Microservices (Remote)

Ust España & Latam; Mos; Presencial; EUR 60.000 - 110.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

23 days annual leave

Healthcare plan

Flexible compensation program

Training platforms access

Career development plans

Referral bonuses

12/14 salary payments option

Work-life balance measures

UST Club discounts

Descripción de la vacante

UST is a multinational technology services company seeking a Senior Java Developer to design, build, and evolve mission-critical backend systems. You will work on Java 17/21, Spring Boot, and microservices in a cloud-native, event-driven environment.

The role emphasizes scalable architecture, reactive programming, gRPC, Kafka, and robust testing in production. Excellent English communication and collaboration across teams are essential.

Formación

• 8+ years of professional Java development experience.
• Strong Spring Framework and Spring Boot experience in production.
• Experience with reactive programming (Project Reactor/RxJava) or asynchronous patterns.
• Production experience with gRPC and Protobuf, including streaming RPCs.
• Knowledge of concurrency fundamentals and thread lifecycle management.
• Solid testing practices with JUnit 5, Mockito, AssertJ.

Responsabilidades

• Design, develop, and maintain backend services using Java 17/21 and Spring Boot.
• Build scalable microservices with reactive programming principles.
• Develop and maintain gRPC APIs and Protobuf schemas with backward compatibility.
• Implement concurrency- and performance-focused solutions.
• Work with Kafka-based event-driven architectures and data stores.
• Create automated tests: unit, integration and contract tests.
• Collaborate on architecture decisions, design reviews, and docs.
• Contribute to CI/CD pipelines, cloud infra, and container deployments.

Conocimientos

Java development

Spring Boot

Reactive programming

Concurrency

Testing practices

Herramientas

gRPC

Protobuf

Kafka

Redis

PostgreSQL

MongoDB

AWS

Descripción del empleo

UST is a multinational technology services company seeking a Senior Java Developer to design, build, and evolve mission-critical backend systems. You will work on Java 17/21, Spring Boot, and microservices in a cloud-native, event-driven environment.

The role emphasizes scalable architecture, reactive programming, gRPC, Kafka, and robust testing in production. Excellent English communication and collaboration across teams are essential.