Lead Java Developer (offline)

Do not miss this amazing opportunity to join a team of top server engineers that design and build the heart of Customer’s games and product platform. You will be challenged to help propel Customer’s platform to the top tier of social gaming through adoption and application of the latest in the Server side, Big Data and AI technology, such as high scalable cloud based infrastructure, stream analysis and machine learning. You will be a key contributor to aspects of design and delivery of all Customer’s Server Systems, Services and Data Stores.

Requirements:
Technical expertise – Architecture & Systems Development

Deep expertise in and experience with Java server side development, real time SOA and microservices architecture (6 years+);
Expertise with REST API Concepts and Dropwizard/Jersey Framework, low-level networking (TCP stack) and Netty Framework;
5+ years of design and delivery of high volume highly available back end infrastructures – Telcos / Trading / AdTech systems, etc.;
Excellent understanding of enterprise architecture patterns, UML;
Gaming or equity trading server side experience is a big plus;
Demonstrated experience delivering systems at large scale (20K+ mps) using Kafka and Hazelcast;
In depth understanding of the Distributed System Concepts: Leadership, Consensus, In-Sync Replicas, Partitioning;
6+ years of hands on Java development, strong familiarity with C / C++;
Strong understanding of key security concepts and patterns;
Excellent understanding of enterprise and mobile facing systems architecture;

Technical expertise - Data Management
Experience with SQL and No-SQL DBs, specifically with Cassandra and MySQL;
Experience with cloud-based Big Data tools;
Experience with Real Time Stream Analysis. Experience with ML and AI modeling a big plus.

Systems Operational maturity
Experience in building operationally mature, well instrumented, very highly scalable, highly available, secure systems;
Experience with Build Automation Tools: Gradle, Jenkins, Nexus, Docker Image Repositories;
Experience with Google Cloud Platform, Kubernetes, Docker, DataDog, Stackdriver
Excellent understanding of SDLC, Java development and continuous integration best practices. Expertise with Jira and Confluence a big plus.

Responsibilities:
Write well designed, testable, efficient code;
Contribute in all phases of the development lifecycle;
Ensure designs are in compliance with specifications;
Support continuous improvement by investigating alternatives and technologies and presenting these for architectural review.
Meeting attendance.
English level:
Intermediate/Upper-Intermediate

Benefits:
Official and timely pay;
Social perks;
Sick pay, vacations;
Flexible work schedule;
Friendly environment;
Medical insurance.

About Olsys

OLSYS Ltd provides full-service solutions for mid-market and enterprise organizations.

With 15+ years of experience, 100+ projects and 50+ strong technical experts in the team, we continue to grow by expanding our development team in Europe, as well as expanding the base of new clients and projects.

As an enterprise software development company, we are building long term partnerships helping our clients accelerate their digital experiences with reasonable IT investments.
Our tailored approach, e-commerce focus, and flexible solutions allow us to design, develop, and deliver scalable, integrated commerce platforms that drive profits and boost the business.

Our industry focus:
— Banking and Finance (business continuity management, planning system, banking app development);
— Retail and E-Commerce (B2B Commerce, B2C Commerce, Digital/E-Commerce customer experience);
— Healthcare (website development for Healthcare organizations).

Our expertise includes:
— Commerce Solutions
— Development Services
— Creative Services
— Quality Assurance and Testing
— Maintenance and Support
— E-Commerce Consulting

Company website:
https://olsysltd.com/

DOU company page:
https://jobs.dou.ua/companies/olsys/