Ciklum is looking for a Senior Java (Kotlin) Engineer to join our team full-time in Ukraine.
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 (Kotlin) Engineer, become a part of a cross-functional development team engineering experiences of tomorrow. You will work on data-intensive systems, focusing on reliability, observability, and seamless user experiences at scale. Ptoject — A fast-growing international e-commerce and technology company that connects millions of customers and sellers through scalable digital platforms and high-load systems. The company operates across multiple markets and builds innovative solutions in online retail, logistics, delivery, and marketplace technologies, serving millions of users daily.
Responsibilities: * Design, build, and maintain scalable backend services in a microservices architecture * Take full ownership of the service lifecycle, from design and implementation to testing, deployment, and production support * Collaborate with cross-functional teams in an international environment to deliver high-quality solutions * Optimize system performance, scalability, and reliability for high-load environments
Requirements: * Strong backend engineering background with a focus on JVM languages (Java, Kotlin) * Hands-on experience with Java 21, Kotlin, and Spring Boot 3 * Experience building microservices and designing modular, scalable architectures * Experience with event-driven systems and messaging platforms (e.g., Apache Kafka) * Experience working with databases such as PostgreSQL, Couchbase, and Elasticsearch * Proven ability to improve performance and reliability of systems handling large-scale data * Strong communication skills and ability to work in a collaborative, international environment * Passion for modern backend practices and continuous learning * Languages: Java 21, Kotlin * Experience with Go is a plus * Frameworks: Spring Boot 3.x, KoTest, Gin (Go) * Data and Messaging: PostgreSQL, Couchbase, Kafka, Elasticsearch * Architecture: Microservices, RESTful APIs, Event-Driven Design * Tools: Docker-enabled local development and CI/CD best practices
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 radical flexibility — work remotely or from an office, your choice * 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.
As one of Ukraine’s largest IT companies and a top employer recognized by Forbes, we’ve spent over 20 years delivering meaningful tech solutions. We proudly support diverse talent and military veterans, recognizing their unique skills and perspectives they bring to shaping the future.
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Explore, empower, engineer with Ciklum!
Interested already? We would love to get to know you! Submit your application. Can’t wait to see you at Ciklum.
