Ivan Gerasimov

As part of a cross-functional engineering team, I contributed to a wide range of initiatives — from user-facing payment experiences to internal tools and dashboards used across the company, as well as HR process automation. I collaborated with different teams, gathered business requirements, prepared technical documentation, and led delivery.

Key Achievements:

• Redesigned the payment flow so new providers could be added faster and with less effort

• Implemented a new internal dashboard that cut support task completion time by 50%

• Added payment verification to the trial flow, significantly reducing the risk of fraudulent sign-ups

• Modernized the build pipeline, reducing deployment time by 80%

#react #zustand #tanstack-query #vite #vitest #testing-library #node.js #sentry

I was a part of the checkout team - the core product used daily by millions of people (3M DAU by the end of 2022). Over 1.5 years, grew from a developer to leading a team of 5 people. Designed frontend application architecture, planned new feature implementations, wrote technical documentation, and managed the team.

Key Achievements:

• Led the implementation of internationalization across the company's entire stack: designed frontend/backend architecture, coordinated 4 development teams, and established a continuous delivery process for new translations to production. The company began expansion into markets beyond the US and Canada

• Designed local-first architecture and migrated the product from Vue to React. After successful MVP, became the team lead of the group that completed development and implementation, becoming the core product development team. Clean architecture enabled complete separation of business logic from UI, improving stability and accelerating releases

• Launched a new product based on extracted checkout business logic with minimal changes. This allowed clients to choose different checkout versions without increasing development complexity and time

#react #testing-library #css-modules #sass #vue #vuex #storybook #webpack #node.js #koa #nestjs #mongodb #clickhouse #sentry #stripe #ddd #clean-architecture

Joined the company as a UI Developer for a specific project, but graduallytook over all frontend development, including Node.js. Worked both under the guidance of a Lead UI Developer and led a team of three developers. In the final year, worked directly with the founder and CTO, participating in discussions related to the user interface and overall product development.

Key Achievements:

• Optimized the company's main application, reducing memory consumption from several gigabytes to hundreds of megabytes

• Designed and launched additional company projects tailored to individual client business needs

• Developed a VS Code extension that integrated core functionality of the main application, significantly simplifying client workflows

#react #react-router #redux #redux-thunk #react-hook-form #css-modules #sass #node.js #angularjs #vue #express.js #koa #vscode-extension #node-red #docker

As a Lead Developer, collaborated with ARM's development and management teams to create the user interface for Kigen - a new platform for enterprise eSIM management.

Key Achievements:

• Designed the application foundation and created an MVP for presentations, which secured funding and enabled further project development

• Coordinated the work of three UI developers

• Delivered multiple releases over a year, bringing the UI to a state that met ARM's internal customer requirements

#react #react-router #redux-saga #styled-components #node.js #koa #web-sockets

Focused on developing user interfaces for various projects. Core tech stack included AngularJS, React Native, and Cordova. Created interfaces adapted for different platforms and client business requirements.

Key Achievements:

• Mobile app in React Native for company incident response

• Dashboard for Canadian Cricket League to assist with team and event organization

• Dashboard for oil trading company

• Cordova-based app for field staff (object photography, geolocation, time tracking)

#angularjs #react #react-native #css-modules #sass #redux #webpack #node.js #cordova

Started my career as a UI Developer, focusing on HTML/CSS development. Gradually transitioned to refactoring legacy JavaScript code, and then to developing new features using AngularJS and partially React.

Key Achievements:

• Improved project's markup quality by making it more structured

• Integrated Mixpanel analytics service into the project

• Designed and developed a hotel booking module

• Optimized Gulp.js build process, reducing build time from 1.5 minutes to tens of seconds

#angularjs #gulp #react #webpack #html #css #less