Java developer (Middle/Senior/Lead) (offline)

We create cloud telecom service processing more than hundreds million calls per week and provide simultaneous telephony access for hundreds of thousands of our colleagues.

Team develops and supports Java back-end applications, including highloaded distributed systems based on in-memory data grid, distributed storage and data processing systems, using NoSQL database MongoDB, Java-based servers and RabbitMQ, proxy servers for requests from internal part of the system to external services.

Technologies: Java 8 (soon will move to Java 11), Spring, Oracle Coherence, Oracle DB, MongoDB, Tomcat, Jetty.


Responsibilities:
Design and develop of highload systems interacting and providing data on a real-time basis
Work on design and coding of system components operating 24/7
Providing decision quality, including constant on-load operation under predictable SLA
Support the product during all cycle of development
Be a part of Agile team, take part in improving development processes and improvement of the teamwork effectiveness

Our expectations:
At least 3 years of hands-on experience using Java SE
Familiarity with the following tech stack: Java 8 (soon will move to Java 11), Spring, Oracle Coherence, Oracle DB, MongoDB, Tomcat, Jetty
Proficiency in OOP methodologies and OOD Patterns
Technical education
At least Intermediate level of English

Will be a plus:
Experience with databases SQL (Oracle), noSQL (MongoDB)
Experience with In-Memory Data Grid (Oracle Coherence)
Experience with distributed systems

Employment Conditions
Work in well-organized professional team
Interesting and challenging tasks, opportunities for self-realization and career growth
Corporate training programs, English language courses during working hours
4 weeks of paid vacation, paid sick leave
Health Insurance
Comfortable working conditions, office in the center of the city with free underground parking slot (for those who located in Odesa)

About Sigma Software

Sigma Software is a place where Nordic Traditions meet Ukrainian Spirit to create Superior Software. We combine the best practices and approaches from Swedish and Ukrainian cultures. Taking high demand for quality, minimal hierarchy, freedom of decision-making, and attention to every opinion from Swedes, as a Ukrainian company we demonstrate flexibility and dedication to every project and every customer.

We are IT consulting and software product company with development offices in Ukraine, Sweden, the USA, Canada, Poland, and Australia. We deliver smartest solutions to our customers in the areas of government, telecommunications, advertising, automotive, gaming, and others. Being a part of Sigma Group, one of the largest Nordic IT corporations, we are a global player with more than 5000 employees in 12 countries and over 1500 in Ukraine.

We work with startups, software houses, and enterprises providing the products and services that suit our clients the most. Company`s R&D centers are mastering the trending technologies and directions: Infotainment, AR/VR, Blockchain, Machine Learning, Data Science, Artificial Intelligence, and others.

Company website:
https://career.sigma.software/

DOU company page:
https://jobs.dou.ua/companies/sigma-software/