Full-stack Developer in Tbilisi, Georgia

Wispence is a website and application for physical and mental health. I served as the chief technology officer, responsible for the project architecture and technology selection, front-end, back-end, and mobile development, leading the development and QA teams. High-quality architecture ensured the smooth operation of the service and maintained the pace of functionality development.

The business needed to integrate several subscription payment services into a single system.

The project included the following functionalities:

• Bring data together from multiple payment providers, like Stripe, Apple, and Google.
• Support different types of subscriptions and one-time purchases.
• Subscribe to web and mobile apps.
• Support discount coupons and promo codes
• Automatic product updates without the re-issue of iOS and Android apps.
• Admin panel, with several capabilities:
a) Add new products, adjust pricing based on the store's country, and customize discounts.
b.) Promo code generation.
c.) Provide trials to individual users.
d.) Issue refunds.
e.) Pause subscriptions for users.

I acted as the architect and full-stack developer. My tasks included the full implementation of the project, namely:

• Collection and analysis of system requirements
• Designing data models and a database that supports working with various billing providers (Stripe, Apple, Google) and meeting system requirements
• Back-end development of client and admin APIs
• Website and mobile apps UI development
• Integration with billing providers on the front and back end
• Development of the admin panel for needed operations

The business's primary value is delivering quality video content with fitness training. Customizing an existing video player was necessary for easy interaction with it. The project included the following functionality:

• Save viewing progress for seamless switching between devices, syncing with smart devices, and monitoring workout progress
• The ability to select the quality of video, audio track, subtitles, music
• UI styling
• Fullscreen mode support
• Volume control, rewinding
• Keyboard control support

I worked on the project as an architect and full-stack developer. My tasks included the full implementation of the project, namely:

• Collection and analysis of system requirements
• Choice of technologies that meet the requirements (I took ReactPlayer as a basis)
• Interface implementation based on the design
• Implementation of the necessary player business logic
• Working with the internal HLS player to filter and control the audio tracks
• Additional customization for iOS and Safari
• Recording and saving viewing progress in the database

The business's primary value is delivering quality video content with fitness training. Customizing an existing video player was necessary for easy interaction with it. The project included the following functionality:

• Save viewing progress for seamless switching between devices, syncing with smart devices, and monitoring workout progress
• The ability to select the quality of video, audio track, subtitles, music
• UI styling
• Fullscreen mode with rotation lock
• Volume control, rewinding
• Gesture support
• Prohibition of screenshots and video recording of the screen while watching a video

I worked on the project as an architect and full-stack developer. My tasks included full implementation of the project, namely:

• Collecting and the analysis of system requirements
• Selecting technologies that meet the requirements (I took React Native Player as a basis)
• Implementing the interface based on the design
• Implementing the necessary player business logic
• Recording and saving the viewing progress in the database

The business needed a fault-tolerant infrastructure that provided automatic scalability and easy monitoring. The project had the following requirements:

• Ease of adding new services as the project evolved
• Automatic scaling
• High level of security and DDOS protection
• Continuous integration and deployment
• Cost minimization
• Resource monitoring and alerts

I worked on the project as an architect and DevOps engineer. My tasks included the complete implementation of the project, namely:

• Collection and analysis of system requirements
• Selection of technologies to meet the requirements (AWS, Terraform, Serverless)
• System architecture description
• Implementation of Terraform script for the automation of infrastructure deployment, monitoring settings, and alerts
• Configuration of the CI/CD front-end applications using AWS Amplify
• Traffic routing to cheaper storage for the sake of optimizing the cost of the service

The business needed to develop a referral program for trainers and users. The project included the following functionality:

• When users register on the site or in the app, the referral link they come through is tracked.
• Trainers get a percentage of payments for clients who register through their referral link or landing page.
• Users get additional months of subscriptions for referrals who register through their link.
• Admin dashboard for tracking key metrics.
• Manager's dashboard, through which he makes payments to trainers.
• Trainer's dashboard for tracking the number of his referrals' registrations and payouts.
• A user dashboard for tracking the number of registrations of their referrals and bonus months of subscriptions.
• Referral information is saved when registering through the app.

I worked on the project as an architect and full-stack developer. My tasks included full implementation of the project, namely:

• requirements gathering and project architecture development
• development of the back-end and database models
• development of dashboards for different categories of users
• implementation of multiplatform links using Firebase Dynamic links, support for custom domains in the React Native application

The business had a blog developed on Netlify CMS that stopped meeting requirements.
Namely:
• ease of adding new articles by content managers
• control of localization of articles into other languages
• ease of integration into a mobile app

I worked on the project as an architect and full-stack developer. My goal was the full implementation of the project, namely:
• collect requirements for a new system
• choosing an optimal technology (Contentful)
• develop data models in Contentful
• migrate relevant articles to the new system
• integration with the Gatsby website
• integration with the mobile application on React Native, cache and reloading of the blog content in the background
• implementation of Rich Text parser for React Native

The business needed to implement a text editor that meets the following requirements:
• ability to work collaboratively
• document layout control
• support of history changes, undo/redo

I worked on the project as an architect and full-stack developer. My tasks included full implementation of the project, namely:
• requirements gathering and analysis
• selecting the best solution (Prosemirror, Logux)
• UI styling
• describing schemes for different types of documents
• Prosemirror configuration
• setting up a Logux server for collaborative work
• RBAC configuration
• performance optimizations