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Mykola Yershov

@mykolayershov

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Senior JavaScript engineer specializing in React, TypeScript, Node.js and test-driven scalable systems.

Ukraine

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What I'm looking for

I seek a technical role where I can lead engineering efforts, design scalable full-stack systems, mentor teams, and apply TDD in an Agile, growth-focused environment.

I am a Senior JavaScript engineer with 10+ years of experience building scalable full-stack applications using React, TypeScript and Node.js. I lead teams, coach developers, and design architecture focused on performance, reliability and maintainability.

My work spans frontend, backend and DevOps concerns: developing React component libraries, micro-frontends, Node/Express services, GraphQL, MongoDB/Postgres data layers, CI/CD and Kubernetes deployments. I advocate TDD and automated testing with Jest, RTL, Cypress and related tools.

I have built payment integrations, customer engagement flows, complex purchase and admin portals, and large-scale CRM/ audit systems while collaborating directly with stakeholders and running Agile processes to deliver production-grade solutions.

Experience

Work history, roles, and key accomplishments

Current

Full Stack Engineer

Current

YozmaTech

Jan 2024 - Present (2 years 1 month)

Developed an educational music app, built backend services for large-data lyric/translation processing, and integrated Stripe, Cardcom and Payme payments to enable monetization and user transactions.

React Redux MongoDB Stripe Customer.io REST APIs

Senior Full Stack Engineer

Nearshorefriends

May 2020 - Feb 2024 (3 years 9 months)

Led development of an international insurance product including purchase flow, admin backoffice, customer portal and payments while managing teams, stakeholders and adopting TDD to improve quality.

React TypeScript PostgreSQL Jest Cypress

Full Stack Architect

Voypost

Feb 2020 - Mar 2020 (1 month)

Extended core app architecture, implemented CI/CD and deployment changes, designed schemas and table relationships, and led small teams to improve scalability and release processes.

Kubernetes GraphQL Docker Jenkins Jest

Senior JavaScript Developer

DecisionMapper

Nov 2016 - Jan 2020 (3 years 2 months)

Contributed to an audit confirmations system for large accounting clients by building frontend frameworks, reusable React components and backend Node.js services while applying TDD and leading agile teams.

React Redux Node MongoDB Jest Puppeteer Webpack TDD

Lead Javascript Developer

Atzma.im

Mar 2016 - Dec 2016 (9 months)

Worked on migrating and replacing an antiquated equities algorithmic trading platform with a new execution management and algorithmic trading system to support business growth.

JavaScript Integration

Frontend Developer

Zyxel

Feb 2016 - Dec 2016 (10 months)

Developed web functionality and branded setup UI for Wi-Fi routers and internet centers, enabling remote connections and ISP-specific default configurations to simplify customer setup.

Angular RESTful APIs LESS HTML5 Mobile Web

Front-End Developer

Infopulse

Jul 2013 - Feb 2016 (2 years 7 months)

Built UI/UX and features for an audit automation project using Knockout/Durandal and related tooling, resolving issues and optimizing code for a large international client.

Durandal RequireJS QUnit JavaScript Web Performance