Senior Java Engineer

Ciklum is looking for a Senior Java 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 Engineer, you will be instrumental in enhancing and consolidating our 3rd Party Logistics (3PL) services. You will be involved in the evolution of our current systems, focusing on creating a unified and efficient data flow for all 3PL communications. Your expertise will be crucial in designing, developing, and maintaining critical components that power our delivery operations and partner integrations. The client is a global food tech company with almost 100 million active users across 25 countries. Their tech ecosystem connects millions of active customers with hundreds of thousands of connected partners in countries across the globe. Their mission: To empower every food moment around the world, whether it’s through customer service, coding or couriers. Responsibilities: Design, develop, and maintain software solutions for our logistics integration platform, ensuring high performance, scalability, and reliability Contribute to the potential migration of our Legacy 3PL service from .NET to Java, leveraging your experience in both technology stacks Architect and implement robust data pipelines using Kafka or SNS/SQS to establish a unified messaging system for all 3PL interactions Design and implement seamless integrations with internal APIs (e.g., Order-API, Restaurant-API, PartnerConnectAPI, Logistics Relay API) and external partner APIs Develop and maintain both synchronous HTTP APIs and asynchronous event-driven integrations Apply your understanding of event-driven architectures and microservices to build a scalable and maintainable platform (EDA and DDD) Bring your understanding of 3PL operations, delivery processes, order status updates, and courier location tracking to the development process Contribute to the understanding and utilization of logistics metrics (e.g., Workload, PrePurchaseEta, PostPurchaseETA) for dynamic decision-making Ensure the quality and stability of your code through thorough testing and adherence to best practices Requirements: Strong experience in software development with a proven track record of building and deploying scalable applications Solid understanding and experience with Java Deep understanding and practical experience with Kafka, including producers and consumers Experience with other messaging systems such as Kafka, SNS, and SQS Proven ability to design and implement RESTful APIs and integrate with external APIs Experience with event-driven architectures and microservices Understanding of database concepts and experience working with various database systems Strong problem-solving and analytical skills Excellent communication and collaboration skills Fluency in English 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. Want to learn more about us? Follow us on Instagram, Facebook, LinkedIn. 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. #LI-AV3 Apply To This Job