Experiences of Tomorrow, Engineered Together!
Senior Java Engineer
Location
Bulgaria
Posted
127 days ago
Salary
0
Seniority
Senior
Job Description
Senior Java Engineer
Ciklum
Ciklum is looking for a Senior Java Engineer to join our team full-time in Bulgaria. 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, become a part of a cross-functional development team engineering experiences of tomorrow. Seeking a developer to lead the test-driven migration of a legacy Java EE application to a modern Spring Boot architecture, including transformation from MySQL to MongoDB. Responsibilities: - Analyze existing Java EE components and document business logic - Design clean, testable Spring Boot services and data access interfaces - Plan and execute MySQL to MongoDB data model transformation - Write unit/integration tests prior to implementation - Execute incremental migration with parallel validation - Ensure performance parity with legacy application Requirements: - Java/Spring Boot - Strong experience building enterprise applications, REST APIs, and data access layers with Spring Data - Jakarta EE/Java EE - Ability to analyze and deconstruct legacy Java EE components (EJBs, JPA, CDI) - MySQL - Deep understanding of relational data models and query optimization - MongoDB - Experience with NoSQL patterns, document modeling, and Spring Data MongoDB - TDD/Unit Testing - Proven track record writing comprehensive test suites before implementation (JUnit, Mockito, Testcontainers) Desirable: - Python - For scripting, automation, and migration tooling - LLM/AI Tools - Experience leveraging AI for code analysis, conversion assistance, and documentation generation - Kafka - Understanding of event-driven architectures for data synchronization - Docker/Kubernetes - Familiarity with containerized deployments What`s in it for you? - Regular salary reviews based on performance - Corporate events: webinars, offline parties, and meetups - Internal Mobility Program - Tailored education path (including full access to Udemy, certifications, etc.) - 25 paid days off: 20 business days of vacation per calendar year + 5 undocumented sick leave days - Additional health insurance - 100% company-covered Multisport card, with discounts available for family members 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. Since expanding to Bulgaria in 2022, we’ve been building a fast-growing team that thrives on learning, collaboration, and innovation. Join us on this exciting journey and help shape the future of our delivery center. 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.
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