Oleksii Liashko Email & Phone Number

Toronto, Ontario, Canada

Kyiv, Ukraine

Manage a team of 4 senior software engineers. Work on designing and creating payment gateway from scratch for the high-load Draftkings product. New payment gateway allowed clients to deposit and withdraw money using various payment methods such as PayPal, Venmo, Mazooma, Interac etc in a peak volume of ~1500 transactions per second.My responsibilities beside development include tasks breakdown, planning, code review, delivering new versions of the product without downtime and rollbacks,… Show more Manage a team of 4 senior software engineers. Work on designing and creating payment gateway from scratch for the high-load Draftkings product. New payment gateway allowed clients to deposit and withdraw money using various payment methods such as PayPal, Venmo, Mazooma, Interac etc in a peak volume of ~1500 transactions per second.My responsibilities beside development include tasks breakdown, planning, code review, delivering new versions of the product without downtime and rollbacks, designing the project architecture and optimising its performance to cover increasing users count.I led creating metrics and monitoring system to be able to see real-time operations, setup alerts and react proactively in case of outages to decrease users impact.My day to day activities include collaboration with the other teams and aligning API contracts, timelines and delivery process which is essential for a company with 3,000 team members. Show less

Kyiv, Ukraine

Manage a team of 4 senior software engineers. Work on payment system for the b2b product - SBtech. Payment system provides opportunity to deposit and withdraw money using more than 50 payment methods around the world (such as Visa&Mastercard, PayPal, ApplePay, Skrill and many others). The main challenge my team handled is supporting different payments flow and regulations of different countries in one system. My responsibilities include task breakdown, planning, code review, delivering… Show more Manage a team of 4 senior software engineers. Work on payment system for the b2b product - SBtech. Payment system provides opportunity to deposit and withdraw money using more than 50 payment methods around the world (such as Visa&Mastercard, PayPal, ApplePay, Skrill and many others). The main challenge my team handled is supporting different payments flow and regulations of different countries in one system. My responsibilities include task breakdown, planning, code review, delivering new versions of the product without downtime and rollbacks, designing the project architecture, optimising performance and developing complex cross-team tasks.I find a ways for improvements of the payment system to make it more stable and responsive for end customers to improve their overall experience.Technologies stack: ASP.NET MVC (C#), Web API, Core, Entity Framework, MSSQL, PostgreSQL, RabbitMQ, Kafka, SOAP, HTML5/CSS3, JS, jQuery, React, IIS, Consul, Fabio Show less

Kyiv, Ukraine

Work on developing payment system for the b2b/b2c product. My team has implemented 50+ new payment options and handled a smooth transition from legacy payment system to brand new one.My responsibilities include integration with payment providers and developing features which provide users the possibility to deposit and withdrawal funds fast and easy. The main challenge is to comply with different countries payment regulations and deal with hundreds transactions per second.Technologies… Show more Work on developing payment system for the b2b/b2c product. My team has implemented 50+ new payment options and handled a smooth transition from legacy payment system to brand new one.My responsibilities include integration with payment providers and developing features which provide users the possibility to deposit and withdrawal funds fast and easy. The main challenge is to comply with different countries payment regulations and deal with hundreds transactions per second.Technologies stack: ASP.NET MVC (C#), Web API, Core, Entity Framework, MSSQL, PostgreSQL, RabbitMQ, Kafka, SOAP, HTML5/CSS3, JS, jQuery, React, Consul, Fabio Show less

Melitopol, Ukraine

The main responsibilities are designing projects architecture and managing the development process. I oversee 7 software engineers. Day to day activities include decomposition and assigning tasks, planning, giving estimates and keeping track on the development process, code review and delivery of new versions of the product. I work with high-loaded projects which require durable and scalable architecture. Also I allocate time to developing complex tasks and knowledge sharing with… Show more The main responsibilities are designing projects architecture and managing the development process. I oversee 7 software engineers. Day to day activities include decomposition and assigning tasks, planning, giving estimates and keeping track on the development process, code review and delivery of new versions of the product. I work with high-loaded projects which require durable and scalable architecture. Also I allocate time to developing complex tasks and knowledge sharing with other team members.Technologies stack: ASP.NET MVC (C#), Web API, Entity Framework, MSSQL, HTML5/CSS3, JS, jQuery, Angular, IIS, Azure, AWS Show less

Melitopol, Ukraine

My responsibility is full-stack developing of the web sites for international companies.I design, develop and deploy projects by myself. My goal is to provide the ready-to-go solution to client.Technologies stack: ASP.NET MVC (C#), Entity Framework, MSSQL, HTML/CSS, JS, jQuery