Backend engineer Ivan Krivonos

May 2025 - Present

Backend Engineer May 2025 - Present

Developed integrations with multiple ERP systems (Domus, Andromeda, Immoware, iXHaus)
Refactored and unified all integrations into a consistent style, simplifying the addition of new integrations and accelerating customer onboarding

Dec 2021 - Mar 2025

Backend Engineer / E4 Dec 2021 - Mar 2025

Researched and discovered stability issues within high-load services, executing corrective measures to enhance stability and achieve a 99.9% SLI level due to company wide SLA standards
Designed and implemented a robust service for storing relevant phones data. Engineered optimized storage and implemented handlers to facilitate efficient retrieval information
Optimized the account deletion process, significantly boosting the deletion rate from 200,000/day to 1,000,000/day. Implemented a worker system utilizing Golang channels and parallel processing for improved efficiency
Implemented unswitchable two-factor authentication for users, selected by some business rules of safety
Successfully migrated a large amount of data in Redis from one data structure to another, ensuring seamless service accessibility and minimal disruption for users

Jan 2020 - Nov 2021

Development Team Lead Dec 2020 - Nov 2021

Led a team of 3 engineers
Deep-diving into business and product requirements for finding better solutions
Elaborating personal goals of team members - created personal growth plans for all by their preferences - tech, management, etc
Improved retrospectives meetings - added checking action points during next sprints and find root causes of problems

Senior Software Engineer PHP/Golang Jan 2020 - Nov 2020

Backend developer in backoffice team
Refactoring legacy code - migrate code from old PHP version to new ones, add linters and CI-checkers for catching errors and problems in code during the developing step not on the deploy to production
Optimize bottlenecks - migrating highload parts from PHP to Golang without missing of functionality
Improving architecture of codebase - made solutions more cleaner by design

Aug 2019 - Dec 2019

Lead Software Engineer Aug 2019 - Dec 2019

Backend development for the project bankofpartners.com
Implemented product for compare companies by different params - markets, cost of services, types of projects, portfolio, etc

May 2016 - Jul 2019

Senior Full Stack Engineer Sep 2017 - Jul 2019

Contributed to implementing a catalog of pre-configured setups
Participated in the UI development of self-service terminals - Angular2+
Migrated the frontend build from Grunt to Webpack due to slow build speeds and a complex dependency setup
Introduced code coverage culture through testing
Enhanced CI: Added code linting checks, executed unit and integration tests
Designed and developed the server-side of an online chat using NodeJS

Full Stack Engineer May 2016 - Aug 2017

Handling minor tasks with a focus on front-end development
Participated in the development of the "RSU Configurator" module - an online builder for configuring system units on the website
Involved in front-end (layout+JS/jQuery scripts) and PHP parts of the project related to component compatibility calculations

Jun 2015 - Apr 2016

Full-stack Developer Jun 2015 - Apr 2016

Development/supporting of software components and website layouts - custom engines, Yii2, Slim, Sass, frontend assembly using Gulp
Configuration of the Sphinx search engine as the primary search system for news websites within the holding
Creation of a news Telegram bot for PrimaMedia Media Holding - Laravel 5, Telegram Bot API
Implementation of GIT code versioning system
Integration of Rocketeer for automated website deployment

Nov 2012 - May 2015

Full Stack Web Developer Nov 2012 - May 2015

First work experience - working with popular PHP CMS (Joomla, Wordpress, Drupal, DLE etc.)
Create and support websites for business clients

Experience