Looking for a job

Nikolai Melnichenko

@nikolaimelnichenko

Front-End Developer at BrainRocket, where I own a shared UI library used across platform applications and ship production releases.

Portugal

Message

At BrainRocket, I own the shared UI component library and its SCSS/BEM architecture, used across the platform’s applications. I work with designers to shape components from early exploration through API definition and documentation.

I also develop a React 19 and TypeScript back-office application and write solution designs for plugins on a new widget platform. Its platform-agnostic core runs in the browser and inside a Flutter mobile app through an embedded QuickJS engine.

As Release Captain for my stream, I’ve shipped more than 100 production releases and established release, Git branching, and code-style conventions. Before BrainRocket, I led a marketplace redesign at REnumber Lab and built financial dashboards and subscription features at NumFin Global.

Experience

Work history, roles, and key accomplishments

Current

Front-End Developer

Current

BrainRocket

Jun 2024 - Present (2 years 5 months)

Own the shared UI component library and SCSS/BEM style architecture. Write solution designs for plugins, improve web performance, and drive automated test coverage. Act as Release Captain with 100+ production releases.

React TypeScript Angular Tanstack Query Zod SCSS Nx (Monorepo)Vite Vitest Playwright Storybook Jest React Testing Library MSW Web Performance Optimization Code Splitting CQRS Agile Scrum Jira

Front-End Mentor (part-time)

BRO Academy

Jul 2025 - Dec 2025 (5 months)

Mentored students of a front-end development course, reviewing homework with written feedback and supporting them with questions between classes.

Mentorship Frontend Development Code Review

Front-End Developer

REnumber Lab

Nov 2023 - Jun 2024 (7 months)

Led a complete redesign of a marketplace platform with React, Next.js and TypeScript. Developed admin panel and client-facing front end for a business SMS messaging product. Managed state with MobX and built responsive, accessible layouts.

TypeScript React Next.js MobX Tailwind SCSS REST APIs GitHub Actions

Front-End Developer

NumFin Global

Oct 2022 - Nov 2023 (1 year 1 month)

Built data-heavy dashboards and interactive charts for financial metrics with Chart.js. Optimized React, TypeScript and Next.js pages with MobX stores. Integrated Stripe payments and used Google Analytics to improve conversion.

TypeScript React Next.js MobX SASS Modules Chart.Js REST APIs Stripe Google Analytics Google Tag Manager Ahrefs SheetJS

Front-End Developer

Citymobil

Apr 2020 - Sep 2022 (2 years 5 months)

Developed ReactJS and TypeScript components with Redux for corporate client dashboards. Covered core form interactions with unit tests and converted legacy JavaScript components to TypeScript.

JavaScript TypeScript React Redux CSS Modules REST APIs Jest React Testing Library