If you’re passionate about games and want to join a unique company that prides itself on experience, come roar with us & unleash your inner lion!


• Experience in software development for more than 2+ years;
• Languages/Specifications: Java 8+, SQL;
• Strong knowledge of Java Core, Error Handling, Servlets, Collections, Java;
• Memory Model, Garbage Collection modes and principles, Concurrency;
• Frameworks: Spring (Boot, MVC, Security, Data);
• Tools:GitLab, Maven, Docker, Jira;
• Databases: MongoDB, Redis;
• Messaging: Redis, RabbitMQ;
• Experience with Zookeeper, Tomcat, AWS (EC2, Lambda, CloudWatch,
RDS, API Gateway);
• Experience with high-performance and high-load systems;

Strong knowledge of Computer Science, Computing Theory:

• Paradigm & Principles (OOP, SOLID, DDD, TDD, BDD);
• Database theory (RDBMS, NoSQL);
• Code testing practices;
• Algorithms;
• Data structures;
• Architectural, Enterprise, and Design Patterns.

Understanding of network interactions:

• Protocols (HTTP, WebSocket);
• Conventions (e.g. REST, RPC);
• Authentication and authorization flow;
• Standards and practices (e.g. oAuth, JWT);

Experience with:

• Troubleshooting, profiling, and debugging applications;
• Agile software processes and technologies;
• Intermediate+ level of English.

Nice to have:

• K8s;
• Experience in TDD;
• Testing: JMeter;
• Tools: Confluence, Jenkins;
• Understanding of Performance Monitoring and Testing (Thread Dumps, CPU and Memory Monitoring, Instrumentation);
• Experience working with Jersey, SLF4J, Log4j, Guava, FasterXML, Jackson ObjectMapper, HttpClients.

We offer:

• Challenging tasks, opportunity to influence the quality of the product;
• Professional management;
• Interesting long-term project;
• Professional and personal development programs;
• Regular performance reviews;
• 20 calendar days of paid vacation, paid sick leave;
• Work in a comfortable office;
• Medical insurance, sports compensation;
• Free English lessons;
• Creating fun while having fun — great people and positive working atmosphere.

About Onseo

ONSEO is a space in which new projects, opportunities and products are born on the basis of diverse experience, knowledge and communication.

We are a modern international IT - company based in Ukraine, in which every staff member has:
opportunity for professional development - versatile tasks and projects of the company allow employees the opportunity to develop their own professional skills.
stability - the company takes care of its employees and ensures their stable work despite external crises (17 years on the global market)
social guarantees (paid vacation, medical insurance,compensation of expenses for sport, free english lessons)
comfortable psychological atmosphere: the work of each is valuable and noticeable to top management and colleagues.

We are united by the idea of creating world-class projects and products. And we have everything necessary for this: possession of a wide stack of technologies, a proven professional team and a reliable business support system, authority in international markets. And the most important thing is the experience and ability to integrate modern technologies into new projects, ideas, solutions.

Are you an IT specialist looking for a progressive company to work at? Join ONSEO team!

Company website:

DOU company page:

Job posted on 17 June 2022
29 views    6 applications

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