Senior Java Engineer (EU)

Ambush; España; A distancia; EUR 55.000 - 90.000; Jornada completa

Descripción de la vacante

Ambush is a distributed, people-first company building modern backend platforms with Java, Spring Boot and microservices. You will join a distributed team, delivering production features end-to-end and communicating with clients in English.

The role targets a hands-on backend engineer capable of shaping backend services, APIs, and integrations in a Java microservices environment, with a focus on quality and reliability.

Formación

• 6+ years of professional backend development with Java.
• Strong core Java skills: OOP, design patterns, collections, multithreading.
• Production experience with Spring Boot and microservices.
• REST API design and integration.
• Relational databases and SQL (PostgreSQL, Oracle, or similar).
• Event streaming or messaging with Kafka or similar.
• Git, CI/CD pipelines and Docker.
• Unit and integration testing with JUnit/Mockito.
• Fluent English for daily client work.
• Based in Spain or Poland with the right to work there.

Responsabilidades

• Design, build and maintain backend services with Java and Spring Boot.
• Develop REST APIs and event-driven integrations with Kafka.
• Write clean, tested code and participate in code reviews.
• Work with architects and product owners to break down requirements and estimate work.
• Support production issues and improve performance and reliability.

Conocimientos

Java

Spring Boot

Microservices

REST APIs

SQL

Kafka

Git & CI/CD

JUnit/Mockito

English

Spain/Poland work eligibility

Herramientas

Docker

Jenkins

Git

Kubernetes

Hibernate/JPA

Descripción del empleo

Ambush is a people first company where talented, thoughtful individuals come together to build meaningful products and lasting partnerships. We believe the best work happens when people feel supported, trusted and empowered to bring their full abilities to the table.
Since 2015, because of our people first and long term mindset, we have grown into a partner relied on by some of the best companies in the world. We combine strong engineering, design and strategy with a growing strength in AI to help our clients see what is next and achieve bigger outcomes.
At the heart of everything we do is our team. We collaborate, take risks, lift each other up and take pride in doing work the right way, not settling for a quick makeshift solution. If you join Ambush, you join a group of people who want you to succeed and who show up for each other every day.
We believe in and expect real teamwork, a constant drive to be better, and delivering meaningful long term outcomes that we can be proud of together.

You will join a distributed team building and modernizing backend platforms with Java, Spring Boot and microservices. Communication with the client is in English.

We're looking for a hands-on backend engineer who delivers production features end to end in a Java microservices environment.

Responsibilities

• Design, build and maintain backend services with Java and Spring Boot
• Develop REST APIs and event-driven integrations with Kafka
• Write clean, tested code and take part in code reviews
• Work with architects and product owners to break down requirements and estimate work
• Support production issues and improve performance and reliability

Must haves

• 6+ years of professional backend development with Java (Java 11+; strong in Java 8+ features such as streams and lambdas)
• Solid Core Java: OOP, design patterns, collections, multithreading and concurrency
• Production experience with Spring Boot and microservices architecture
• REST API design and integration
• Relational databases and SQL (PostgreSQL, Oracle or similar)
• Event streaming or messaging with Kafka or similar
• Git, CI/CD pipelines (e.g. Jenkins) and Docker
• Unit and integration testing (JUnit, Mockito)
• Fluent English for daily work with the client
• Based in Spain or Poland with the right to work there

Nice to haves

• Experience in banking, payments or other financial services
• AWS (or another major cloud provider)
• Kubernetes
• Hibernate / JPA
• Frontend exposure with React or Angular
• Experience on consulting or client-facing projects