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Senior Java Software Engineer

X Flow Games — Poland · Posted ~2 hours ago

Senior

Skills

Java Java Core Java Memory Model Multithreading Spring Core Spring Data Spring MVC SQL System design Performance optimization Java 21+ Gradle Spring Kubernetes RabbitMQ AWS GCP

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Summary ✨ AI‑Generated

Build an analytical platform capable of processing petabytes of data as a Senior Java Engineer. You will design and deliver scalable solutions using modern Java, Spring, cloud platforms, Kubernetes, messaging infrastructure, and service-oriented architecture, with a strong emphasis on performance, concurrency, and thoughtful system design.

Highlights

Senior engineering opportunity to design and deliver systems processing petabytes of data, with a modern Java stack and significant focus on performance, complexity management, and large-scale distributed infrastructure.

Description

X-FLOW is a mobile game development company established in 2018. We gained recognition after the release of Happy Color, the most popular digital coloring book and one of the most successful ad-driven mobile apps in the world. We take pride in our diverse and talented team and partners, spread across the UK, Cyprus, the Netherlands, and other regions worldwide. We're looking for a Senior Java Engineer to join our team and help us build an analytical system that processes petabytes of data. We expect candidates to have a deep understanding of the tools they use. If you can assess the complex problem, design and deliver a solution with attention to balance between performance and complexity — we might be looking for you. Technology stack: Gradle, Java 21+, Spring, k8s, RabbitMQ, Service-oriented infrastructure, AWS and GCP cloud platforms. Requirements: Strong understanding of Java Core, Memory Model, MultiThreading.Strong understanding of Spring Core, Data, MVC.Proficiency in SQL, solid understanding of Relational Databases.Solid understanding of software development principles.Solid understanding of data storage design principles. Nice to have: Experience writing and optimizing BigQuery queries.Experience with Spring Reactive stack, Spring Batch and AMPQ.Experience with Apache Camel.Experience with Graph DB like Neo4j. Responsibilities: You'll be involved across the full lifecycle of tasks — from solution design through implementation, debugging, and documentation. What We Offer: Competitive salary and benefits package.Opportunity to work with a talented and passionate team in a creative and dynamic environment.Flexible working hours and remote/office work options.Career growth and professional development opportunities.A fun and inclusive company culture that celebrates diversity and creativity.Join us and let’s create great content together!