Middle Strong / Senior Java Developer (вакансія неактивна)

We are looking for a skilled and motivated Java Developer with over 3 years of hands-on experience in Core Java to work with our Customer who develops AI-based SaaS solutions that help companies optimize their businesses. These solutions include business planning & execution, process automation, and optimization. The Customer’s platform leverages industry-leading ML and AI for better predictions and prevention of disruptions across businesses.

The ideal candidate should be well-versed in Java SE (up to version 17), software design principles, and modern frameworks such as Spring Boot. You will work in an Agile team developing scalable, high-performance back-end services, with opportunities to grow your technical expertise in cloud technologies and data platforms like Snowflake and Kafka.

Responsibilities:

• Design, develop, and maintain robust back-end systems using Java (up to SE 17)
• Implement scalable microservices using Spring Boot
• Write clean, maintainable, and testable code following SOLID and DRY principles
• Collaborate with cross-functional teams in an Agile/Scrum environment
• Develop and execute unit and integration tests using JUnit and Mockito
• Optimize SQL queries and interact with relational databases
• Contribute to performance testing using tools like JMeter (if applicable)
• Participate in code reviews, design discussions, and sprint planning

Requirements:

• 5+ years of hands-on experience in Core Java and Advanced Java
• Strong knowledge of Java SE (up to version 17)
• Solid understanding of design patterns and principles (SOLID, DRY)
• Good knowledge of SQL and relational databases
• Good knowledge of NoSQL databases like Elastic/Solr
• Experience in Spring Boot and Microservices architecture
• Proficiency in unit testing using JUnit and Mockito
• English level — Upper-Intermediate or higher (both spoken and written)

Will be a plus:

• Familiarity with Java 21
• Experience with Apache Kafka
• Familiarity with Snowflake or similar cloud data platforms
• Exposure to cloud services like Microsoft Azure
• Experience with performance testing tools such as JMeter
• Knowledge of TestNG

We offer:

• Remote-first work model with flexible working hours (we provide all equipment)
• Comfortable and fully equipped offices in Lviv and Rzeszów
• Competitive compensation with regular performance reviews
• 18 paid vacation days per year + all state holidays
• 12 days of paid sick leave per year without a medical certificate + extra paid leave for blood donation
• Medical insurance with an affordable family coverage option
• Mental health program which includes free and confidential consultations with a psychologist
• English, German, and Polish language courses
• Corporate subscription to learning platforms, regular meetups and webinars
• Friendly team that values accountability, innovation, teamwork, and customer satisfaction
• Inclusive environment where everyone feels valued and treated equally. We proudly partner with VeteranHub to support Ukrainian veterans
• We are committed to supporting Ukraine and actively participate in charity initiatives