Mariam is available for hire
Hire MariamMariam Khojashvili
Verified Expert in Engineering
React Developer
Tbilisi, Georgia
Toptal member since December 2, 2022
Bio
Mariam is a seasoned front-end software engineer specializing in React development, delivering top-notch solutions. Her key strengths include expertise in React, Redux, and front-end technologies, with skills in code review, task management, deployment, and mentoring. She has a proven track record in enhancing page loading times, optimizing user experiences, and translating UI/UX designs into high-quality markup. Mariam has strong problem-solving abilities, focusing on performance optimization.
Portfolio
FxPro Group
Node.js, JavaScript, TypeScript, Fastify, MongoDB, Non-relational Databases...
IOA Lab
TypeScript, React, Redux, Sass, JSS, JavaScript, Web3.js, HTML, CSS, Ethers.js...
Toptal
Next.js, TypeScript, React, Node.js, Vercel, Supabase
Experience
- React - 6 years
- APIs - 6 years
- JavaScript - 6 years
- Next.js - 6 years
- Node.js - 6 years
- Express.js - 6 years
- TypeScript - 5 years
- Docker - 4 years
Preferred Environment
Slack, MacOS, WebStorm, Chrome, Git, Jira, ESLint, Axios, API Integration, Context API, Mentorship & Coaching, Agile, Confluence, Mobile First, NPM, APIs, React, JavaScript, CSS, HTML5, Angular, Full-stack, Full-stack Development, CI/CD Pipelines, Redis
The most amazing...
...thing: led the groundbreaking development of a social trading platform, optimizing SEO, refactoring code for speed, & achieving exceptional performance results.
Work Experience
Senior Full-stack Developer
2024 - PRESENT
FxPro Group
- Developed Node.js custom scripts to automate new content-adding processes.
- Improved page performance and SEO by 40% (metrics measured using Lighthouse).
- Refactored old code from Angular to new scalable code on React.
- Developed a new admin panel for cross-project use, using Node.js, MongoDB, and React.
Technologies: Node.js, JavaScript, TypeScript, Fastify, MongoDB, Non-relational Databases, Docker, GitLab Runner, Kubernetes, Fastly, Full-stack, Full-stack Development, MySQL, CI/CD Pipelines, Express.js, PostgreSQL, Redis, Dashboards, Progressive Web Applications (PWAs), Figma to React, RESTFul APIs, AngularJS, Relational Databases, Startups, Storybook, SvelteKit, MongoDB Atlas, Vercel, Page Speed Optimization
Senior Front-end Developer
2022 - PRESENT
IOA Lab
- Developed a social trading platform and a landing website with SEO and productivity optimizations.
- Fixed multiple productivity issues within old code, which resulted in faster and lighter performance.
- Used smart contracts to implement all necessary blockchain features requested by product owners.
- Refactored old code to new scalable code according to.
- Managed the front-end team: code review, task management, deployment, consultation, mentoring, and work planning.
- Developed new staking products improving customer adoption by 20%.
- Designed multiple dynamic and browser-compatible pages using HTML5, CSS3, and JavaScript (React, Redux).
- Identified issues and provided solutions to problems related to performance and poor UX, and improved UX to ensure support and up-to-date user experience for existing customers.
Technologies: TypeScript, React, Redux, Sass, JSS, JavaScript, Web3.js, HTML, CSS, Ethers.js, Scrum, React Redux, JSX, Git, GitLab, GitHub, ECMAScript (ES6), Sockets, Jira, ESLint, Webpack, Blockchain, Front-end, GraphQL, User Interface (UI), User Experience (UX), Mobile-first Design, Styled-components, React Query, Front-end Development, Application State Management, APIs, Tailwind CSS, Material UI, Axios, Technical Leadership, API Integration, Contentful, REST APIs, Node.js, Context API, Interactive UI, Animation, HTML Templates, Mentorship & Coaching, Agile, Confluence, Mobile First, NPM, HTML Email, Next.js, TypeScript 3, HTML5, Minimum Viable Product (MVP), Team Leadership, Data Visualization, Netlify, Amazon Web Services (AWS), Chart.js, Recharts, DApps, Web3, ÐApp, CSS3 Animation, HTML5 Animations, Transitions, Figma, Mobile, Responsive Web Design (RWD), REST, Tailwind UI, UI Components, Full-stack, Full-stack Development, MySQL, CI/CD Pipelines, Express.js, Redis, Dashboards, Progressive Web Applications (PWAs), Figma to React, Relational Databases, Storybook, MongoDB Atlas, Vercel, Page Speed Optimization
Next.js Developer
2026 - 2026
Toptal
- Implemented onboarding feature with Supabase React and Node.js.
- Implemented an audio annotation tool and a canvas with complex rendering.
- Introduced new features, such as a preview of the annotation project.
Technologies: Next.js, TypeScript, React, Node.js, Vercel, Supabase
Front-end/TypeScript Expert
2025 - 2026
Serguei Balanovich
- Fixed app performance issues, optimized app re-renders.
- Fixed the app's development build. Made the build 3x faster.
- Introduced tests to the app. Covered the app with unit, integration, and E2E tests.
Technologies: React, TypeScript, Tailwind CSS, Application State Management, Next.js, Redux, Zustand, Redis, Dashboards, Data Visualization, Express.js, tRPC
Full-stack React/Node.js Developer
2025 - 2026
Klimt Technologies, LLC
- Re-created the database structure from the old database with improvements.
- Created a user web platform for users from scratch based on business needs, with an improved design.
- Re-created the back end from scratch, based on the old version's business logic needs.
- Created an admin panel for managing the user platform.
Technologies: React, Node.js, Tailwind UI, Responsive UI, TypeScript, API Integration, Supabase, Supabase Auth, Fastify, Jest, Unit Testing, Integration Testing, Vercel, Page Speed Optimization
Front-end Engineer
2024 - 2024
Ethos Network, Inc.
- Refactored the project from MUI to Ant \Design and Emotion.
- Moved the project from a Next.js pages router to an App Router.
- Redesigned the whole project according to new designs from Figma three times.
Technologies: React, TypeScript, JavaScript, Node.js, MUI CSS, Blockchain, Smart Contracts, Solidity, Mobile, Responsive Web Design (RWD), REST, UI Components, CI/CD Pipelines, Redis, Dashboards, Progressive Web Applications (PWAs), Figma to React, Vercel, Page Speed Optimization
React Developer (via Toptal)
2024 - 2024
The Gifts Company LLC
- Developed a new screen in React to define notifications as broadcast messages and connect API calls to it.
- Dealt with existing critical issues on the project.
- Detected vulnerabilities in the project and fixed them, improving performance.
Technologies: React, JavaScript, Docker, Amazon Web Services (AWS), REST APIs, Redux, Context API, Mobile, Responsive Web Design (RWD), REST, UI Components, CI/CD Pipelines, Redis, Dashboards, Progressive Web Applications (PWAs), Figma to React, Vercel, Page Speed Optimization
Senior Developer
2024 - 2024
Jesse Feinsod
- Found the best-suited library for the client's needs.
- Developed a 3D line graph to visualize the client's data as they wanted.
- Oversaw integration and launch processes, resulting in a fast and efficient launch.
Technologies: Framer, JavaScript, Mobile, Responsive Web Design (RWD), REST, UI Components, CI/CD Pipelines, Progressive Web Applications (PWAs), Figma to React, Vercel, Page Speed Optimization
Senior Developer
2024 - 2024
DNG
- Created a script for a 3D custom line graph for integration on the Framer website.
- Provided support for integrating 3D graphs into the Framer website.
- Deployed a chart on a separate domain to generate a URL for Framer integration.
Technologies: JavaScript, Framer, Figma, Mobile, Responsive Web Design (RWD), REST, UI Components, Vercel, Page Speed Optimization
React Developer
2022 - 2022
Boosty Labs
- Refactored a feature written in Vue.js into React.
- Implemented unique animations as the client requested using TypeScript, React, and Sass.
- Used smart contracts with ethers.js to handle work with smart contracts.
- Developed new React components for the customer-facing web application, improving page loading time by 20%.
- Produced multiple visual elements of web applications by translating UI/UX design and Vue.JS into ReactJS code, producing high-quality markup using JSX and CSS Modules.
- Developed a crypto Real estate selling/renting platform for the new generation of renters and homebuyers.
Technologies: TypeScript, React, Redux, Next.js, Sass, Web3.js, JavaScript, HTML, React Redux, Ethers.js, Scrum, JSX, Git, GitLab, GitHub, ECMAScript (ES6), Jira, ESLint, Webpack, Docker, CSS, Blockchain, Front-end, User Interface (UI), User Experience (UX), Mobile-first Design, Styled-components, React Query, Front-end Development, Application State Management, Material UI, Axios, API Integration, Contentful, REST APIs, Context API, Interactive UI, Animation, HTML Templates, Mentorship & Coaching, Agile, Confluence, Mobile First, NPM, HTML Email, APIs, TypeScript 3, HTML5, Minimum Viable Product (MVP), Firebase, Data Visualization, Netlify, Amazon Web Services (AWS), Chart.js, Recharts, DApps, Web3, ÐApp, CSS3 Animation, HTML5 Animations, Transitions, Figma, Mobile, Responsive Web Design (RWD), REST, Tailwind UI, UI Components, Vercel, Page Speed Optimization
React Developer
2021 - 2021
Code & Care
- Developed a high-performance admin panel for the mobile app using React.
- Used Redux with Redux-Saga middleware in the application. Retrieved and stored data from the back end and also perform Restful services.
- Implemented SOLID principles to improve the scalability of the codebase.
- Developed new React components for the customer-facing web application, improving page loading time by 20%.
Technologies: TypeScript, React, JavaScript, JSS, Redux, Redux-Saga, Scrum, React Redux, JSX, Git, GitLab, GitHub, SQL, ECMAScript (ES6), Gatsby, Jira, ESLint, Webpack, Docker, HTML, CSS, Front-end, GraphQL, User Interface (UI), User Experience (UX), Mobile-first Design, Styled-components, Front-end Development, Application State Management, React Native, Material UI, Axios, API Integration, REST APIs, Context API, Interactive UI, Animation, HTML Templates, Mentorship & Coaching, Agile, Confluence, Mobile First, NPM, Next.js, APIs, TypeScript 3, HTML5, Minimum Viable Product (MVP), Data Visualization, Amazon Web Services (AWS), Chart.js, Recharts, CSS3 Animation, HTML5 Animations, Transitions, Figma, Mobile, Responsive Web Design (RWD), REST, Tailwind UI, UI Components, Vercel, Page Speed Optimization
Front-end Developer
2019 - 2021
Websmart
- Developed a virtual try-on application with a 3D model viewer and AR placement.
- Used Three.js for 3D model manipulations needed for the online shopping platform.
- Improved the try-on app's performance. Discovered a new way of tracking faces and moving 3D models according to face position.
- Created demo sites for potential clients, resulting in the successful funding of the startup.
- Developed a new solution for a real-time try on the app with face tracking, which increased the application's speed three times.
Technologies: React, Redux, Redux-Saga, JavaScript, CSS, SCSS, JSS, HTML, TypeScript, Material UI, Ant Design, Three.js, React Router, Tailwind CSS, Scrum, React Redux, JSX, Redux Thunk, Git, GitLab, GitHub, SQL, ECMAScript (ES6), Bootstrap, Jira, ESLint, Webpack, Node.js, Express.js, Front-end, User Interface (UI), User Experience (UX), Mobile-first Design, Styled-components, Front-end Development, Application State Management, Axios, API Integration, REST APIs, Context API, Interactive UI, Animation, HTML Templates, 3D, Mentorship & Coaching, Agile, Confluence, Mobile First, NPM, Next.js, APIs, HTML5, Minimum Viable Product (MVP), Data Visualization, Internet of Things (IoT), eCommerce, MongoDB, Amazon Web Services (AWS), Chart.js, Recharts, CSS3 Animation, HTML5 Animations, Transitions, Figma, Mobile, Responsive Web Design (RWD), REST, UI Components, Non-relational Databases
Experience
AR Placement and Virtual Try-on
Developed a React-based app for eCommerce to improve an online shopping experience. I made it possible to virtually try on items that users are interested in: glasses, shoes, and even furniture for homes or offices.
Medical Shift App
Created a React-based admin panel for an app created for medical workers to help manage work shifts. They could start/end the shift from the app and report incidents that happened during a shift. Also, users can create reports about a patient's sleep schedule, behavior, and money usage during the shift. The Admin panel I made was used to retrieve created reports, timesheets, and other data. The app can also sort, filter, edit, delete, or create data.
Ledger NFT Sale Platform
Set up a React-based platform for the first sales of NFTs by a crypto ledger. I was the front-end developer and created unique animations and features requested by the client according to the UI/UX designs provided with Figma. I debugged and fixed existing and new bugs on the project.
DApp Platform
• Developed a React-based DApp to provide users with easy and efficient access points to the best of decentralized finance. I helped set up 15 customizable earning strategies and all market data in one spot to let users benefit from the future of finance.
• Fixed multiple productivity issues within old code, which resulted in faster and lighter performance.
• Used smart contracts to implement all necessary blockchain features requested by product owners.
• Managed the front-end team: code review, task management, deployment, consultation, mentoring, and work planning.
• Developed new staking products, improving customer attraction by 20%.
• Designed multiple dynamic and browser-compatible pages using HTML5, CSS3, and JavaScript (React, Redux).
• Identified issues and provided solutions to problems related to performance and poor UX to ensure support and up-to-date user experience for existing customers.
• Fixed multiple productivity issues within old code, which resulted in faster and lighter performance.
• Used smart contracts to implement all necessary blockchain features requested by product owners.
• Managed the front-end team: code review, task management, deployment, consultation, mentoring, and work planning.
• Developed new staking products, improving customer attraction by 20%.
• Designed multiple dynamic and browser-compatible pages using HTML5, CSS3, and JavaScript (React, Redux).
• Identified issues and provided solutions to problems related to performance and poor UX to ensure support and up-to-date user experience for existing customers.
Crypto Copy Trading Platform
Bidsbee is the ultimate solution to all the challenges of crypto trading. Its comprehensive set of advanced yet easy-to-use tools and functions allows users to join the trading world as seamlessly as possible. The functionality of copy trading enables users to benefit from the expertise of professionals and earn a passive income without participating in trading activities. For professional traders, the platform offers the most advanced functionality and all the relevant data on the market in one place for users' comfort and more profit. All services are non-custodial, which guarantees the top safety level for the funds of our users.
About the role:
• Developed a new landing app for the crypto trading platform from scratch according to Figma design using React, TypeScript, and Next.js.
• Optimized app SEO utilizing React SEO strategies and best practices with Next.js.
• Ensured high performance across multiple browsers and devices.
About the role:
• Developed a new landing app for the crypto trading platform from scratch according to Figma design using React, TypeScript, and Next.js.
• Optimized app SEO utilizing React SEO strategies and best practices with Next.js.
• Ensured high performance across multiple browsers and devices.
Certifications
MAY 2026 - PRESENT
AI Fluency: Framework & Foundations
Anthropic
MAY 2026 - PRESENT
Introduction to Claude Cowork
Anthropic
MAY 2026 - PRESENT
Teaching the AI Fluency Framework
Anthropic
FEBRUARY 2022 - PRESENT
Scrum Fundamentals Certified
VMEdu Inc
Skills
Libraries/APIs
React, React Router, Node.js, REST APIs, Context API, Chart.js, Recharts, Redux-Saga, Web3.js, Three.js, React Redux, Sockets, React Query
Tools
JSX, Git, Webpack, Confluence, NPM, Figma, Redux Thunk, GitLab, GitHub, Jira, Fastly, MongoDB Atlas, JSS, Sentry, GitLab Runner, Claude
Languages
JavaScript, TypeScript, HTML, CSS, SCSS, Sass, ECMAScript (ES6), HTML5, TypeScript 3, SQL, GraphQL, CSS3, Solidity
Frameworks
Next.js, Redux, Material UI, Tailwind CSS, Express.js, Ant Design, Bootstrap, React Native, AngularJS, Angular, MUI CSS, Fastify, Jest, tRPC
Paradigms
Agile, Responsive Web Design (RWD), REST, Scrum, Functional Programming, HTML DOM, Unit Testing
Platforms
Amazon Web Services (AWS), Mobile, Vercel, Firebase, Blockchain, Contentful, Netlify, Docker, Kubernetes
Storage
Redis, MongoDB, MySQL, PostgreSQL, Relational Databases
Other
ESLint, Front-end, User Interface (UI), User Experience (UX), Mobile-first Design, Styled-components, Front-end Development, Application State Management, APIs, Code Review, Axios, API Integration, Interactive UI, HTML Templates, Mentorship & Coaching, Mobile First, HTML Email, Minimum Viable Product (MVP), Team Leadership, Data Visualization, eCommerce, DApps, Web3, ÐApp, CSS3 Animation, HTML5 Animations, Transitions, Tailwind UI, UI Components, Non-relational Databases, Full-stack, Full-stack Development, CI/CD Pipelines, Dashboards, Progressive Web Applications (PWAs), Figma to React, RESTFul APIs, Startups, Responsive UI, Supabase, Page Speed Optimization, Ethers.js, Team Mentoring, Technical Leadership, Animation, 3D, Storybook, SvelteKit, Gatsby, i18n, Team Management, Internet of Things (IoT), Framer, Smart Contracts, Supabase Auth, Integration Testing, Artificial Intelligence (AI), Zustand
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