Yurii Kovalchuk Email & Phone Number

Calgary, AB, CA

Calgary, Alberta, Canada

Kyiv, Ukraine

• Designed and developed a fault-tolerant and reliable system for transferring large filesusing gRPC technology, which made it possible to reliably transfer files larger than 100Gb
• Wrapped existed large legacy solution by more than 500 unit tests which greatly increasedthe reliability of the system
• Investigated and solved poor performance problems, reduced the project loading time by~3.3 times
• Developed of a subsystem for applying and verifying electronic signatures (CAdES, ASiC,XAdES, PAdES), which is used by more than 80 customers and over 20 000 people per day.
• Participated in the creation of the largest state electronic archive in the history of thecountry as a backend developer of systems for verifying the validity and data storage
• Developing and maintenance one of the largest docflow systems in the country, working ina large and diverse team, acted as a mentor

Kyiv, Ukraine

• Created over 30 components which became part of the SDK
• Successfully dealed with memory leaks, AV errors, emergency shutdowns without logwhich increased the stability and reliability of the product
• Developed a scalable client-server application for use in community outreach centers usingSOAP, REST, XML, JSON, automation of interaction with Microsoft Office and OpenOffice
• Provided migration main product from old Delphi 6 to Delphi XE7
• Developed more than 600+ Oracle stored procedures, optimized many SQL queries forhigh loads Database design
• Designed, developed and maintained of complex, large docflow product

Kyiv, Ukraine

• Designed and developed automated industrial data collection system (SCADA system),alerts system, process control, accident system which had an uptime rate of 98.5%,successfully reporting supply system failures and.
• Developed aт energy saving control device for industrial gas meters based on STM32,which could work autonomously for at least 180 days
• Designed and developed specialized warehouse inventory control system, which reducedthe picking time by up to 5 times and reduced the number of required warehouse workers
• Developed more than 80 reports that included hundreds of different indications andparameters of industrial equipment, displaying readings in the report both in tabular formand in the form of convenient histograms and.
• Developed and maintained 11 product subsystems that used data exchange with thehardware level (RS232, RS485, modbus, AT, DCON)