Razvan Paraschiv

A multipurpose application with a microservice architecture designed to suit the multiple needs of a big company.

The application consists of a suite of plug-n-play modules that serve as plugins to the core functionalities that are very similar to the ones of a CMS. The core of the solutions is implemented with Node.js and MongoDB with Angular as a front-end framework.

Some of the most notable modules of the applications are:
• Leave management module used for requesting, managing, and administrating the leaves of the entire company.
• Metrics calculation module used for tracking different aspects of projects, sprints, and individual performances to improve all the processes in the company.
• Coaching module used by everyone to track their coaching sessions, write objectives, and make other comments about coaching sessions.

All microservices have been implemented using Spring Boot or Node.js and Angular or React. The infrastructure is based on Kubernetes and Docker containerization. All the microservices communicate with each other by either using API calls or event-based communication via RabbitMQ. During my work on the project, I was a full-stack developer and took care of the DevOps and infrastructure parts.

A DApp that is primarily used by the holders of an NFT collection and represented by an ERC-721 implementation.

Users can access features of the application based on their NFT holdings. For example, people may play around in a virtual real estate sandbox to buy and customize an NFT parcel. On top of that, the website also features a news aggregation tool that gathers crypto-related news from other websites via web scraping, tweets, and Discord announcements.

The DApp's architecture respects the client-server model by having a client application built in React and a hybrid back end consisting of Ethereum Smart Contracts, NestJS APIs, and Firebase Cloud Functions. I designed and implemented the architecture of the blockchain solution and worked on both back-end and front-end features.

The Spot app represents an international loyalty mobile application for all the clients of a mall chain in Eastern Europe.

It features many useful features, including searching for stores, products, and offers, paying for parking inside the mall area, and, most importantly, offering a gamified shopping experience.

Users can scan their receipts or check in inside any mall to receive points they can spend afterward on different perks offered by the malls. The mobile app has been developed in React Native to support simultaneous development for iOS and Android, and the back end is developed in Spring Boot and Azure Cloud Services.

Receipt scanning is done via a trained custom model and Azure Cognitive Services. In addition to the assets mentioned above, the application comes with a back-office client implemented with Angular.

A P2E NFT-based game that initially started on Ethereum and then got migrated to the Polygon network for a better user experience.

I implemented the smart contracts for the Ethereum version and some UI integrations. For the second phase of the game, I participated in the Polygon bridging implementation and designed the architecture for the new smart contracts on Polygon. In addition, I also implemented the majority of the game modes and part of the back-end functionalities, including blockchain event listeners and elliptic curve digital signature algorithm (ECDSA) endpoints for claiming.

This application consisted of a cumulation of cron jobs and scripts that synchronized and migrated data, including tickets, sprints, users, teams, labels, and releases to different ticketing systems to Jira by using the Jira REST API.

I implemented the entire application. The supported ticketing systems are Azure DevOps and V1.

An application for a mental health clinic that offers administrative functionalities for the staff and a portal where customers can read about mental health specialists, choose one, and have their video sessions online.

The app features web-based and mobile solutions. I acted as a technical lead and took part in the implementation of the front-end and back-end components of the solutions. In addition, I worked on the application's infrastructure by designing pipelines, writing deployment configuration files, and creating cloud resources.