Aleksandar Orelj
Full-Stack Developer
Part of FatCat Coders since:
March 2024
With over 7 years of experience in both starting projects from scratch and rewriting existing ones, Aleksandar has extensive expertise in desktop, web, and mobile development across various niches. What sets Aleksandar apart is his team-leading experience and his ability to work independently while mastering new technologies.
TradeWay
Client ProjectMay 2024 - ongoing
TradeWay is an innovative trading application that is integrated with the most important vendors for trading with crypto.
Collaborating on a trading application as part of a three-developer team, with a primary focus on backend development.
Key responsibilities include integrating multiple vendors such as MatchTrade for trading, a Sumsub user verification vendor, and a Coinspaid payment vendor.
Developing complex backend features using gRPC for rapid information distribution from MatchTrade.
Main tech stack:
NestJS, NodeJS, NextJS, ReactJS, TypeScript, gRPC, f(x) Protocol, PostgreSQL, TypeORM
CatBot
internal projectMarch 2024 - May 2024
CatBot is an internal project with the aim to enhance the daily needs of the FatCat Coders in various departments integrating the Open AI Chat Bot into Slack.
Contributes to an internal project, including integrating the OpenAI Chat Bot into Slack.
Developed several solutions related to the Calamari API and Insightful API, including Upcoming Vacation and Holiday information, and Monthly Reporting.
Regularly collaborates with the team for the constant improvement of the software.
Main tech stack:
Slack API, OpenAI API, Bolt SDK
TradeWay
Client ProjectMay 2024 - ongoing
TradeWay is an innovative trading application that is integrated with the most important vendors for trading with crypto.
Collaborating on a trading application as part of a three-developer team, with a primary focus on backend development.
Key responsibilities include integrating multiple vendors such as MatchTrade for trading, a Sumsub user verification vendor, and a Coinspaid payment vendor.
Developing complex backend features using gRPC for rapid information distribution from MatchTrade.
Main tech stack:
NestJS, NodeJS, NextJS, ReactJS, TypeScript, gRPC, f(x) Protocol, PostgreSQL, TypeORM
PropTrek Platform
client project for “Noviprog”March 2022 - March 2023
Real estate software that speeds up apartment sales and rentals in the form of a platform, allowing users to find, chat with agents, and complete the entire process online.
Working on real estate sales/rental software with a Service-Oriented Architecture that included several technologies (C++, Java, NodeJS, ReactJS, React Native).
The main responsibilities included leading and supporting team members, as well as mobile application development and production deployment using Expo ReactJS Native.
Main tech stack:
C++, Java, NodeJS, ReactJS, React Native
Voxtronics
client projects for “Noviprog”February 2020 - March 2022
Voxtronics produces secure telecommunication products and solutions for enterprises with high safety requirements and organizations with critical infrastructure.
Worked on over 20 secure telecommunication products and solutions for enterprises with increased safety requirements and organizations with critical infrastructure, using the latest technologies.
Had significant responsibilities, including leading the team and ensuring the quality of the final product.
Main tech stack:
ReactJS
Yummee
client project for “Noviprog”August 2021 - September 2022
Yummee is a Hungarian time-based restaurant booking service. Users can register to view restaurant offers, discounts, and track reservations with options to cancel or edit.
Developed a feature that enables users to register and view a complete overview of restaurants, their offers, and available discounts. Email notifications are sent for all actions.
Created both the API using NestJS and the mobile application using Expo React Native.
Main tech stack:
NestJS, React Native, NodeJS
Fastest
client project for “Noviprog”March 2021 - April 2022
Software developed during the Coronavirus pandemic to control access to locations based on COVID status and monitor individuals' conditions using COVID certificates.
Focused on API development using NodeJS and MongoDB, and provided support to the front-end team during critical release deadlines.
Took on a team lead role, introducing a new API architecture that enhanced productivity and confidence among developers, leading to improved decision-making.
Main tech stack:
NodeJS, MongoDB
Wasseranalytik
client project for “Noviprog”March 2020 - December 2020
Wasseranalytik is software for documenting water and air analyses. It streamlines the process by automating offer submissions and sending emails once the analysis is completed and data is collected.
Working on a product for water analysis and developing specifications for monitoring surface water quality.
Implemented a new application with an API developed in NestJS and TypeScript, and created a web app using NextJS.
Main tech stack:
NestJS, NodeJS, TypeScript, NextJS, ReactJS
Securaze Erasure Software
client project for “Noviprog”March 2019 - September 2020
A mobile application that is in direct communication with the main Securaze Data Erasure software.
Developed data erasure software as the main technical solution among various options.
Responsible for the development and production deployment of the Securaze Motion mobile application using React Native (Default RN CLI).
Developed the Securaze Agents application in ReactJS and supported the team with API development.
Main tech stack:
NodeJS, Express, C++, ASP.NET, ReactJS, QT/QML, React Native.
Servotel
client project for “Noviprog”October 2018 - January 2021
Telecommunication service with tracking and management of incoming calls.
Contributing to high-quality call center services and intelligent IT solutions, focusing on tailored, round-the-clock customer care.
Responsible for rewriting the old software using ReactJS and NodeJS.
Main tech stack:
ReactJS and NodeJS
Sec
SecQJuly 2018 - September 2018
Software that provides a full security and authentication process from manufacturer to consumer.
Worked on a product that provides a full security and authentication process from manufacturer to consumer.
The SecQR mobile application uses a unique code based on blockchain technology to show all the movements of the product from the factory to your shopping bag.
Rewrote the API code to NodeJS with MongoDB and developed the web app with ReactJS and Redux.
Main tech stack:
NodeJS, ReactJS
Bachelor's degree in Environmental Engineering
Faculty Of Technical Sciences University Of Novi Sad
2011 - 2015
English - C1
Football
Motorcycles