Backend Developer (Java/chatbot)

Kyivstar.Tech is looking for a Backend Developer to join our Product Development Team. The role has all the advantages of working in a product team — versatile projects, plenty of independence, chance to influence the direction of the development and opportunity to grow with the role.About UsKyivstar.Tech is a Ukrainian hybrid IT company and a resident of Diia.City . We are a subsidiary of Kyivstar, one of Ukraine's largest telecom operators.Our mission is to change lives in Ukraine and around the world by creating technological solutions and products that unleash the potential of businesses and meet users' needs.Over 500+ KS.Tech specialists work daily in various areas: mobile and web solutions, as well as design, development, support, and technical maintenance of high-performance systems and services.We believe in innovations that truly bring quality changes and constantly challenge conventional approaches and solutions. Each of us is an adherent of entrepreneurial culture, which allows us never to stop, to evolve, and to create something new.What You Will DoCollaborate with development team, Product Owner and CTO in real and interesting product tasksSelection and implementation of the necessary tools, technologies, and techniquesDesigning and implementing architecture of an applicationCode review and code quality control over formed standards of developmentWriting efficient codeQualifications And Experience NeededSpring: Core, MVC, Security, Boot (4+ year)Experience with chatbot developmentMicroservices architecture understanding + understanding of Event Sourcing, CQRS and DDDRestful services (REST) dev experience (4+ year)Persistence frameworks: Spring: Spring Data, Hibernate (4+ year)Experience in branch-based workflow (git)Messaging: ActiveMQ / JMSThorough understanding of RDBS: MySQL, PostgreSQL, Oracle and non-RDBMS like CassandraUnit testing with JUnit and MockitoExperience with Docker containers in production (2+ year)Strong understanding | usage of SOLID principles and software design patternsExperience with continuous integration as is (principles, instruments)A plus would beKnowledge of highloadWhat We OfferOffice or remote — it's up to you: you can work from anywhere, and we will arrange your workplaceRemote onboardingPerformance bonuses for everyone (annual or quarterly — depends on the role)We train employees: with the opportunity to learn through the company’s library, internal resources, and programs from partnersHealth and life insuranceWellbeing program and corporate psychologistReimbursement of expenses for Kyivstar mobile communication