Senior Java Engineer

Ciklum is looking for a Senior Java Developer to join our team full-time in Poland.

We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live.

About the role:
As a Senior Java Developer, become a part of a cross-functional development team engineering experiences of tomorrow. Together, we will work on the project modernizing and migrating legacy customer applications to modern Java-based platforms, enhancing scalability, performance, and reliability while adopting GenAI advancements where applicable.

Responsibilities:

• Assist in the development, testing, and deployment of Java-based applications using Spring Boot

• Write clean, maintainable code following standard software development principles

• Continuously learn and adopt new technologies and approaches, especially those related to GenAI

• Participate as a software developer on small Agile teams delivering solutions for migrating legacy applications to MongoDB

• Follow best practice migration playbooks and innovate to fill gaps with creative solutions

• Take direction from technical leads and project managers while raising challenges and proposing solutions

• Adapt to changing project priorities from customers or account teams

Requirements:

• Bachelor's degree in Computer Science, Information Technology, or a related field

• 4-7 years of experience working as a Java software developer

• Basic knowledge of Python, including reading, understanding, and writing simple scripts for automation or data handling

• Strong understanding of Java fundamentals and object-oriented programming

• Experience with Spring Boot (academic, internships, or professional projects)

• Strong experience building applications that interact with relational databases using SQL

• Experience delivering modern applications using Agile methodologies, test-first development, CI/CD pipelines, and Git version control

• Exposure to building REST APIs with Spring Boot

• Basic understanding of microservices concepts

• Experience in performance and memory optimization of Java applications

• Familiarity with tools such as Postman, IntelliJ IDEA, and Maven/Gradle

• Exposure to other languages or technologies like JavaScript and SQL

• Understanding of ORM tools such as Hibernate, Spring Data, or JPA

What`s in it for you?

• Strong community: Work alongside top professionals in a friendly, open-door environment

• Growth focus: Take on large-scale projects with a global impact and expand your expertise

• Tailored learning: Boost your skills with internal events (meetups, conferences, workshops), Udemy access, language courses, and company-paid certifications

• Endless opportunities: Explore diverse domains through internal mobility, finding the best fit to gain hands-on experience with cutting-edge technologies

• Flexibility: Enjoy flexibility – full remote working possibilities

• Care: We've got you covered with company-paid medical insurance, mental health support, and financial & legal consultations

About us:
At Ciklum, we are always exploring innovations, empowering each other to achieve more, and engineering solutions that matter. With us, you'll work with cutting-edge technologies, contribute to impactful projects, and be part of a One Team culture that values collaboration and progress.
With delivery centers in Wrocław and Gdańsk, our 300+ professionals in Poland drive forward-thinking solutions for global clients. Join a community where collaboration sparks innovation — and your impact reaches millions.

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Explore, empower, engineer with Ciklum

Interested already? We would love to get to know you Submit your application. We can't wait to see you at Ciklum.