Staff Engineer Java | Spring Boot, Kafka, RxJava, Kafka (remote,75-80k)

THE BOARD | people & talent; España; Remote; EUR 90,000 - 120,000; Full time

Benefits offered by this job

Remote work from Spain

38-hour workweek

Career development opportunities

Health insurance

Remote work allowance

High-end laptop

Job summary

The BOARD | people & talent is seeking an accomplished engineer to drive architecture across distributed systems and microservices. You will influence standards, design patterns, and engineering best practices while staying hands-on in a fast-moving team.

We value deep Java expertise, experience with Kafka, and cloud-native delivery. Expect a remote-friendly role from Spain, with a focus on high performance, low latency, and scalable platforms enhanced by AI-assisted development tools.

Qualifications

• Experience designing and evolving microservices at scale.
• Strong Java expertise with Spring Boot, Vert.x and RxJava.
• Deep knowledge of asynchronous messaging and event-driven architectures (Kafka).

Responsibilities

• Lead architecture decisions and set engineering standards.
• Design high-scale distributed systems with low latency.
• Collaborate with cross-functional teams to deliver resilient services.

Skills

Java

Spring Boot

Vert.x

RxJava

Distributed systems

Microservices

Kafka

Cloud

Kubernetes

AI-assisted development

Tools

PostgreSQL

Couchbase

Azure

AWS

Job description

This is a highly technical role for an engineer who goes beyond frameworks and tools, with a strong understanding of distributed architectures, asynchronous messaging, low-latency systems java reactive programming (Vert.x, RxJava) and software design principles. You will have real influence over architecture and engineering standards, working in lean teams and leveraging modern AI-assisted development tools.

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What are we looking for?

• Architecture & High-Scale Systems: Design, build and evolve highly scalable microservices and distributed systems, ensuring reliability, maintainability and performance across mission-critical services.
• Deep Java Engineering: Bring strong expertise in Java, Spring Boot, Vert.x and RxJava, with a solid understanding of modern functional programming approaches, concurrency and performance optimisation.
• Event-Driven & Asynchronous Architecture: Design and optimise asynchronous messaging and event-driven solutions using Apache Kafka, with particular attention to throughput, latency, resilience and system behaviour under scale.
• Technical Leadership: Influence architecture and engineering decisions across multiple initiatives, defining design patterns, technical standards and engineering best practices while remaining strongly hands-on.
• Performance & Reliability: Analyse and improve system performance, identifying bottlenecks and designing solutions capable of supporting high-volume, low-latency environments.
• Cloud, Kubernetes & Data: Work with Azure or AWS, Kubernetes and modern data platforms, combining SQL and NoSQL technologies such as PostgreSQL and Couchbase within distributed architectures.
• AI-Augmented Engineering: Incorporate modern Agentic AI and AI-assisted development tools such as Tabnine and Gemini into engineering workflows to improve developer productivity and support efficient, high-quality software delivery.

What does our client offerr?

• Immediate start with a permanent contract.
• Remoto work model from Spain, 38-hour workweek, flexible hours, and career development opportunities.
• 23 vacation days, health insurance, social benefits, remote work allowance, high-end laptop and acces