Gregory Tertyshny

Address: Kyiv, Ukraine
Phone: +380994355814
Email: tertyshny.gregory@protonmail.com
Site: tertyshy.dev
Git: git.tertyshy.dev

Software Engineer with 9+ years of experience in web and mobile technologies. Specialized in creating maintainable and efficient software solutions. Passionate about learning new technologies and sharing knowledge. Proven expertise across multiple programming languages and platforms. Git: git.tertyshy.dev

Work History

10-2022 - current

Team Lead

BrainRocket - Cyprus/Remote

Designed and maintain payment gateway solution for all teams in the company.
Prepared and outlined architecture for simple card processing service to get PCI DSS license.
Onboarding new engineers, preparing cross-team guidelines.
Experimenting with new technologies and researching competitors' solutions.

TypeScript, Nest.js, MySQL, Kafka, GraphQL, AWS, ClickHouse

08-2023 - 11-2023

Golang course curator

Projector - Ukraine /Online

Taught Go basics to the group of 15+ devs with different knowledge levels.
Presented online lectures, discussed interesting topics with students.
Demonstrated Go's strengths and weaknesses.
Guided students to the completion of all homeworks and course work.
Explored with students and showed the evolution of the application from one file to the multiprocess architecture.

09-2020 - 10-2022

TypeScript Backend Developer

BrainRocket - Cyprus/Remote

Created new features for microservice architecture.
Refactored old codebase parts.
Supported and added dozens of payment integrations for different countries.
Led the effort to migrate legacy service to new architecture.
Reduced development time by half.

TypeScript, Nest.js, MySQL, MongoDB, Nats, GraphQL, TypeORM

06-2020 - 09-2020

Flutter Developer

Ensocore - Ukraine

Compared and tested cross-platform mobile app technologies as possible solutions.
Developed cross-platform customer facing food delivery mobile application with multi-language support.
Set up communication with legacy third-party API.
Integrated Google Maps and geolocation services.
Added support for online payments.

Dart, Flutter, Google Maps, RxDart

01-2020 - 05-2020

React Native Developer

Ensocore - Ukraine

Implemented existing design for mobile application.
Set up communication with third-party API.

React Native, TypeScript

11-2018 - 12-2019

Full Stack React Native Developer

Ensocore - Ukraine

Researched and documented possible solutions for cross-platform mobile app.
Integrated with legacy customer ordering system.
Developed multi-container API for React and React Native clients.
Published mobile app to multiple stores.
Integrated with payment provider for local payments.

PHP, TypeScript, Slim, MySQL, React, React Native, RabbitMQ, docker-compose

03-2018 - 11-2018

Full Stack TypeScript Developer

Ensocore - Ukraine

Implemented Node.js API for the unusual table-like mobile quiz game editor.
Integrated existing database with new API.

TypeScript, Node.js, Express, React, MongoDB, docker-compose

05-2017 - 03-2018

Full Stack PHP Developer

Ensocore - Ukraine

Communicated with client to understand specific system requirements.
Designed and delivered admin dashboard with:
Employee profiles management system
Customer review aggregation system

PHP, Laravel, MySQL, Vagrant, Supervisord

Education

09-2016 - 12-2018

42 system: Software Engineering

UNIT Factory - Kyiv

09-2014 - 05-2016

Bachelor of Science (unfinished): Software Engineering

National University Of Life And Environmental Science - Kyiv

05-2014 - 06-2014

Audit: Linux Maintenance

Linux Professional Institute - Kyiv

09-2010 - 05-2014

Junior Specialist

Irpin' Economic College - Irpin