Oleksii – Typescript, JavaScript, React Native, experts in Lemon.io

Oleksii

From Poland (UTC+2)flag

Full-Stack Developer|Senior
Mobile Developer
Lemon.io stats
4
projects done
1803
hours worked

Oleksii – Typescript, JavaScript, React Native

Oleksii has 6+ years of proven experience in the tech industry. His experience includes developing complex mobile applications, games, browser extensions, voice assistants, and rich user interfaces, as well as leading a team and assigning tasks to team members. Oleksii is a critical thinker who works well in a team and is highly adaptable to changes.

9 years of commercial experience in
Healthcare
Management
Productivity
Social media
Marketplace
Trade
Main technologies
Typescript
6 years
JavaScript
6 years
React Native
5 years
React
6 years
Node.js
6 years
AWS
4 years
Tailwind CSS
3 years
Additional skills
Vue.js
Nest.js
Express.js
MongoDB
PostgreSQL
MySQL
Firebase
Saga
React Query
Next.js
Webpack
GraphQL
Apollo Client
Unit testing
REST API
Styled-components
RxJS
D3.js
Redux
Web 3.0
TypeORM
Docker
WebRTC
Fastlane
Swift
Kotlin
Web Sockets
Solidity
Bitrise
Ethers.js
Three.js
Jest
Mocha
Flexbox
React Flow
Webflow
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Experience Highlights

Full-stack Mobile Developer
Aug 2023 - Nov 20241 year 3 months
Project Overview

A marketplace where customers can explore products, filter results, and bookmark items. It offers a comprehensive platform for finding great deals, discovering upcoming tech events, and accessing expert advice, all within the community. Community-driven, the app brings together discounts and tech outlets in one convenient location. The app supports features.

Responsibilities:
  • Implemented a seamless and intuitive user interface for the app;
  • Integrated interactive features such as auctions, quizzes, and drawings;
  • Contributed to building a scalable app architecture that supports a growing user base;
  • Implemented a comprehensive filtering system that allows users to narrow down product searches.
Project Tech stack:
Typescript
React Native
Node.js
Kubernetes
Full-Stack Developer
Jul 2022 - Aug 20231 year 1 month
Project Overview

The platform empowers health and social care organizations to enhance quality by supporting their teams. It facilitates patient health tracking for new patients and online clinics through customizable tests and surveys. With instant data access and advanced analytics, Tendable delivers real-time quality assurance insights from the frontline to leadership.

Responsibilities:
  • Contributed to the development and optimization of customizable patient tests and surveys;
  • Helped implement powerful analytics and real-time quality assurance insights;
  • Improved data accessibility and integration;
  • Contributed to building tools that enhanced team efficiency.
Project Tech stack:
Next.js
AWS Lambda
Nest.js
Material UI
Full-Stack Developer
Oct 2021 - Jul 20229 months
Project Overview

The platform is designed to inspire and enhance self-perception by helping users set and achieve personal goals. It features a user-friendly journaling interface, live coaching sessions, personal development courses, and challenges aimed at improving various aspects of life. Users can track their progress and compare it with other participants based on completed tasks.

Responsibilities:
  • Developed progress-tracking features that allow users to monitor their achievements;
  • Integrated live coaching sessions into the app;
  • Implemented interactive challenges that encourage users to set personal development goals;
  • Contributed to building a scalable app architecture that handled rapid user growth.
Project Tech stack:
React Native
Node.js
AWS
Angular
Full-Stack Developer
Aug 2020 - Oct 20211 year 2 months
Project Overview

It is a platform for musicians to connect with their followers and share content like tracks, podcasts, films, and images. It also lets musicians organize events such as concerts, live streams, and workshops to create exclusive experiences and build community. With integrated AI transcription, the app makes audio content searchable and helping users discover tracks.

Responsibilities:
  • I integrated AI technology into Avocado, enabling automatic voice-to-text transcription;
  • I developed interactive audio rooms, allowing users to engage in dynamic conversations;
  • I contributed to the creation of personalized user profiles;
  • I worked on optimizing Avocado's performance to accommodate a growing user base.
Project Tech stack:
AWS
Smart contracts
Node.js
MySQL
Full-stack Mobile / Web Developer
May 2019 - Aug 20201 year 3 months
Project Overview

A trustworthy platform for buying and selling art. Our platform features a rigorous client selection process, curated listings, and a seamless purchasing journey. Leveraging AI technology, we provide personalized recommendations, chatbot support, and voice assistants to help users discover the ideal artwork and tools for custom creations.

Responsibilities:
  • Implemented voice assistant features;
  • Created and deployed chatbot functionality to assist users with inquiries;
  • Integrated AI-driven recommendation engines;
  • Developed algorithms for curating art listings based on various criteria.
Project Tech stack:
Node.js
Express.js
Tailwind CSS
Nest.js
Full-stack Developer
Feb 2018 - Apr 20191 year 2 months
Project Overview

A novel tab tool designed for productivity, capable of efficiently managing your tasks. This tool facilitates effortless task organization, simplifying document creation and team project tracking.

Responsibilities:
  • Implemented intuitive user interfaces and interactive features that simplify task organization;
  • Engineered Eesel's privacy-focused design, ensuring user data security;
  • Designed and implemented Eesel's folder-based organization system;
  • Developed algorithms for Eesel's curated feed functionality.
Project Tech stack:
React
Material UI
AWS
Nest.js
Full-Stack Developer
Apr 2017 - Feb 201810 months
Project Overview

Revolutionizing procurement and subcontractor management within the DE construction industry. Easily broaden your network of subcontractors from your existing contacts or discover the perfect fit within our database. With just one click, send out tenders effortlessly.

Responsibilities:
  • Implemented robust backend systems to efficiently manage subcontractor data;
  • Integrated advanced search and filtering functionalities;
  • Optimized the platform's performance to ensure swift loading times;
  • Conducted thorough testing and debugging to identify and resolve any technical issues.
Project Tech stack:
React
Node.js
ExpressJS
MongoDB

Languages

English
Advanced

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