Senior Java Engineer
capco
Senior Java Engineer
xflow· Happy Color
About this role
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!
When you apply for this role, we process your personal data in accordance with our Candidate Privacy Notice (https://xflowgames.com/candidate-privacy-notice).
Frequently Asked Questions
Is the salary disclosed for the Senior Java Engineer position at xflow?
The salary for this Senior Java Engineer role at xflow is not publicly listed. Click "Apply Now" to learn more about the compensation package on their official careers page.
Where is the Senior Java Engineer position at xflow located?
This Senior Java Engineer role at xflow is based in Warsaw, Mazowieckie, Poland. The position is listed as on-site or hybrid. Check the full job description or apply directly to confirm the work arrangement.
Is the Senior Java Engineer role at xflow full-time or part-time?
This is listed as a Deel B2B position. It is posted as a Senior Java Engineer role in the Happy Color department at xflow.
Which team or department does the Senior Java Engineer at xflow belong to?
This Senior Java Engineer position is part of the Happy Color department at xflow. See the full job description for more information about the team structure and responsibilities.
How do I apply for the Senior Java Engineer position at xflow?
Click the "Apply Now" button on this page. You will be redirected to xflow's official application portal hosted on bamboohr where you can submit your application directly.
When was the Senior Java Engineer job at xflow posted?
This Senior Java Engineer position at xflow was posted on Jun 29, 2026. Apply as soon as possible — early applications are often reviewed first.
Senior Java Engineer
xflow
You'll be redirected to xflow's official application page on bamboohr.