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
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