Oleksandr S.

About Me

A self-motivated and inventive developer with a passion for back-end web development that enjoys a challenge, and has good front-end capabilities as well. Likes to participate in the entire product life-cycle and has a real desire to help businesses achieve their potential.

Frontend

Backend

Database

Workflow

Other

Work history

UpStack
UpStack
Full-Stack Developer
2018 - Present (7 years)
Remote
  • Create and develop high-level technical projects for a broad range of global clients.

  • Lead teams in the development process, writing exceptional code that adheres to the highest standards.

  • Follow the AGILE methodology and ensure project-wide best practices are met in all fields.

Independent Contractor
Independent Contractor
Full-Stack Developer
2017 - Present (8 years)
Remote
  • Completely repaired an unstable application with long query time and a substantial number of bugs and provided exceptional consulting services to various clients.

  • Reviewed the code of previous developers, found the underlying issues and fixed them by writing clean/high quality code for a variety of applications.

  • Configured Linux Servers (AWS EC2), conducted QA and bug fixing ensuring that the product I developed was stable, scalable and adhered to the requirements.

RiverSoft, UA
RiverSoft, UA
Java Engineer
2015 - Present (10 years)
Kremenchuk, Ukraine
  • Developed an application that managed over 5,000 corporate clients, each of which generated up to several hundred users with 99.99% SLA for central server.

  • Instrumental in developing an application that helped save 30% of the budget for informing users.

  • Increased conversion by 15% after developing an application that substantially sped up transfers within the system.

Showcase

Full Stack Developer (Team Lead) - Armaskillo (currently closed)
Full Stack Developer (Team Lead) - Armaskillo (currently closed)
  • Led full-stack development for an internal gaming tournament web application.

  • Automated game activity analysis, created advanced reports, and added new payment methods.

  • Increased server response speed by three times on one project.

Full Stack Developer - Minnow.tv
Full Stack Developer - Minnow.tv
  • A web application built with a RESTful server application and a client-side React.js SPA.

  • The application reduces server query processing speed by three times.

  • The code has been optimized to minimize bugs and decrease the number of lines of code, resulting in faster development.

Back-End Developer (Team Lead) - RiverSoft
  • Developed and maintained core game processes including games, reporting/analytics, monitoring, and cashier workplaces for both online and offline casino software.

  • Managed the development of the entire project, focusing on the core infrastructure and systems around which the rest of the application was built.

  • Significantly increased the usability of existing products through focused development efforts.

Back-End Developer - Flower
  • Led the back-end development of Flower, a social network platform.

  • Designed and implemented a global architecture and infrastructure for the platform.

  • Utilized technologies including Java 8, Groovy, Spring Framework, Hibernate, Spring Data, MySQL, MongoDB, Redis, Elasticsearch, and Spock Framework.

Education

Education
Ph.D, Pressure Working Processes and Machines
Kremenchuk State Polytechnical University
2017
Education
Master’s Degree, Transport Management
Kremenchuk State Polytechnical University
2013
Education
Bachelor's Degree
Kremenchuk State Polytechnical University
2012