Alkiviadis – Node.js, React, Next.js

One of the largest educational institutions in Germany that operates a coding school that offers various courses, including web development. Alkiviadis is one of the lead instructors responsible for providing comprehensive training in full-stack development.

• Designed and delivered comprehensive MERN stack training to over 50 aspiring developers, promoting industry-standard coding practices and critical thinking;
• Created and executed supplementary workshops on unit testing and end-to-end testing using Cypress, equipping students with vital quality assurance skills;
• Introduced a special module on microservices architecture, offering in-depth understanding and hands-on experience on this modern application design pattern;
• Conducted specialized training sessions on creating applications with Vue.js and Next.js, expanding the tech stack exposure of students;
• Utilized a mix of instructional methods, including hands-on exercises, group projects, and one-on-one mentoring, to accommodate diverse learning styles and promote practical learning;
• Regularly updated and refined the curriculum based on industry trends and student feedback, ensuring course relevance and efficacy;
• Provided continual feedback and guidance to students, assisting them in mastering complex technical concepts and overcoming learning hurdles.

Training individuals on MERN stack.

• Trained and coached over 200 developers;
• Besides the regular curriculum, delivered workshops on;
• Did Unit testing and e2e testing using Cypress;
• Buil Microservices architecture;
• Created Apps with Vue.js.

A web-based enterprise platform for managing capital expenditure (CAPEX) projects.

It was used by internal stakeholders to submit, evaluate, and monitor investment projects, including financial analysis and approval workflows.

• Built critical parts of the platform used for financial decision-making
• Implemented real-time updates and complex financial calculations
• Integrated authentication with Azure AD
• Delivered stable production features under enterprise constraints

AGiLE CRM is a custom enterprise CRM system rewrite, replacing an existing legacy application built with Java 9 and Hibernate.

The goal was to modernize the system, improve maintainability, and support evolving business workflows. The platform is used internally to manage sales, offers, orders, and production-related processes.

• Designed the full system architecture and database schema from scratch
• Implemented clean API structure and scalable backend services
• Translated unclear business processes into structured digital workflows
• Delivered a system that replaced multiple disconnected tools

A SaaS HR management platform designed to handle employee lifecycle, payroll, and performance tracking.

• Designed multi-tenant SaaS architecture;
• Built modular HR system covering multiple domains;
• Delivered localized payroll logic.

DocFoundry is a SaaS platform designed to extract structured data from documents such as invoices, receipts, contracts, and forms.

The system combines OCR and AI-based extraction to convert unstructured documents into structured formats (JSON, CSV, Excel), enabling automation and integrations.

• Designed end-to-end document processing pipeline
• Built AI-assisted extraction workflows for complex documents
• Defined scalable architecture for SaaS + API usage
• Focused on automation-ready outputs for integrations
• Combined multiple technologies (OCR + LLMs) into a unified system

A backend system for managing pharmaceutical order workflows, designed to handle secure data exchange between internal systems and national healthcare infrastructure.

The application supports order processing, validation, and integration with external public systems (ΕΚΑΠΥ), ensuring data accuracy and compliance with healthcare requirements.

Main features:

• Order processing and validation workflows
• Integration with national hospital system (ΕΚΑΠΥ)
• Secure API communication for sensitive healthcare data
• Transactional data handling and consistency guarantees
• Structured data model for orders and related entities

• Designed and implemented backend architecture using FastAPI;
• Built integration with external national healthcare system (ΕΚΑΠΥ);
• Designed transactional database schema ensuring data consistency;
• Implemented validation and secure communication for sensitive data;
• Optimized queries and data flows for reliable processing.

A system designed to optimize capital allocation across multiple DeFi pools to maximize yield (APR).

It collected real-time data from different sources, processed it, and executed allocation strategies based on predefined optimization logic.

• Designed allocation algorithms for yield optimization
• Built data pipelines combining multiple external sources
• Delivered high-performance system with fast decision cycles
• Translated financial logic into automated execution

A marketplace platform for trading green energy assets (e.g. EUAs, guarantees of origin), designed to provide transparency and efficient access to environmental markets.

The platform combines real-time market data, order management, and news feeds to support decision-making for traders and stakeholders in the energy sector.

Main features:

• Marketplace for listing and trading green energy assets
• Real-time order book and market data updates
• News feed and data aggregation for market insights
• Secure authentication with user verification (KYC flags)
• Scalable backend services with API-driven architecture

• Designed and implemented end-to-end system architecture across frontend, backend, and infrastructure;
• Built real-time data pipeline (order book + streaming updates) using WebSockets;
• Achieved fast response times (<120 ms first load) under concurrent usage;
• Implemented secure authentication and user verification logic;
• Set up CI/CD pipelines and deployment across multiple environments.

One of Egypt's largest private banks, with approximately 6000 employees, implemented a debt and collection management system provided by EXUS, a leading global provider in this field.

• Wrote complex SQL queries and PLSQL procedures;
• Found solutions to many complex problems like generating and sending SMS to proper recipients on dynamic periods of time;
• Handled ETL pipelines.

A comprehensive rental property management platform that enables property owners to manage and control their rental properties remotely. The platform offers features like issuing virtual keys to employees and guests, monitoring utility usage, and providing remote management capabilities.

• Developed the front end of the mobile application using React Native, offering an intuitive and user-friendly interface for property owners;
• Integrated the functionality to monitor utility usage, providing property owners with vital information about their properties;
• Ensured the application's responsiveness and optimized performance across multiple device types and screen sizes;
• Worked in close collaboration with the back-end team, communicating requirements and aligning application functionality with back-end capabilities;
• Conducted extensive unit testing to identify and rectify bugs, ensuring the application's robustness and reliability.

The client required a customized dating application that would enable registered users to connect with others, form friendships, create groups, and share videos, audio, and messages with both groups and individuals. Key requirements for the platform included multi-language support, allowing users to post images, process them, and receive comments and interactions from their friends. Additionally, an administration app was needed to facilitate administrative tasks and provide analytics for the platform.

• Created an AWS VPC (Virtual Private Cloud) with bastions;
• Designed the front and back-end architecture;
• Implemented a multilanguage support system;
• Created a user roles management system;
• Added image processing functionality;
• Implemented a system to broadcast audio and video.

A custom camping management system was developed to streamline the guest registration process, campsite assignment, and checkout procedure for a campsite. The application was designed to meet the client's unique needs and assist them in effectively managing their campground. Key features included a user authentication module, a dynamic check-in form for guest registration, and a comprehensive dashboard for displaying and filtering check-ins.

• Implemented the user authentication system using Firebase authentication libraries, enhancing the system's security.
• Developed a user-friendly check-in form using React and Redux, which allowed the client to register incoming guests efficiently.
• Created a feature-rich dashboard to display and filter check-ins, helping the client to manage the camping area effectively;
• Utilized Node.js to build the backend of the application, ensuring robust and reliable data management;
• Handled the project's complete lifecycle, from requirements gathering to deployment, demonstrating proficiency in full-stack development.