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Backend Developer with hands-on experience designing and developing backend applications using Node.js, Express.js and Microsoft SQL Server. Built secure RESTful APIs, JWT authentication, role-based authorization, and scalable relational database architectures, including a multi-tenant Property Management System (PMS) integrated with the Channex API. Backed by several years of professional experience in IT Support and customer-facing roles, with strong analytical and problem-solving skills and a commitment to continuous learning. Experienced with debugging, testing via Postman, and supporting real-world systems across both hospitality and business IT environments.…Backend Developer with hands-on experience designing and developing backend applications using Node.js, Express.js and Microsoft SQL Server. Built secure RESTful APIs, JWT authentication, role-based authorization, and scalable relational database architectures, including a multi-tenant Property Management System (PMS) integrated with the Channex API. Backed by several years of professional experience in IT Support and customer-facing roles, with strong analytical and problem-solving skills and a commitment to continuous learning. Experienced with debugging, testing via Postman, and supporting real-world systems across both hospitality and business IT environments.

KOKAROPOULOS ANGELOS

Back-End Developer, Web Developer, Programmer, +2

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Backend Developer with hands-on experience designing and developing backend applications using Node.js, Express.js and Microsoft SQL Server. Built secure RESTful APIs, JWT authentication, role-based authorization, and scalable relational database architectures, including a multi-tenant Property Management System (PMS) integrated with the Channex API. Backed by several years of professional experience in IT Support and customer-facing roles, with strong analytical and problem-solving skills and a commitment to continuous learning. Experienced with debugging, testing via Postman, and supporting real-world systems across both hospitality and business IT environments.…Backend Developer with hands-on experience designing and developing backend applications using Node.js, Express.js and Microsoft SQL Server. Built secure RESTful APIs, JWT authentication, role-based authorization, and scalable relational database architectures, including a multi-tenant Property Management System (PMS) integrated with the Channex API. Backed by several years of professional experience in IT Support and customer-facing roles, with strong analytical and problem-solving skills and a commitment to continuous learning. Experienced with debugging, testing via Postman, and supporting real-world systems across both hospitality and business IT environments.

Available to hire

Backend Developer with hands-on experience designing and developing backend applications using Node.js, Express.js and Microsoft SQL Server. Built secure RESTful APIs, JWT authentication, role-based authorization, and scalable relational database architectures, including a multi-tenant Property Management System (PMS) integrated with the Channex API.

Backed by several years of professional experience in IT Support and customer-facing roles, with strong analytical and problem-solving skills and a commitment to continuous learning. Experienced with debugging, testing via Postman, and supporting real-world systems across both hospitality and business IT environments.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Beginner

Language

Greek, Modern

Fluent

English

Advanced

Work Experience

Property Management System (PMS) Backend Developer (Channex Integration) at Aria Hotel Pms (GitHub repository: Aria Hotel Pms)

January 1, 2025 - Present

Designed and developed a multi-tenant backend architecture for a Property Management System (PMS). Implemented secure modular RESTful APIs using Node.js and Express.js, including CRUD operations and business logic for managing users, properties, and reservations. Built a normalized Microsoft SQL Server relational database supporting multi-tenant property management. Integrated the Channex API to synchronize properties, reservations, and related hospitality data. Implemented JWT-based authentication, role-based authorization, and reusable middleware for authentication, validation, and error handling. Tested and validated backend functionality using Postman throughout development.

IT Support Specialist – Backend Developer at Bratnet Software Solutions

September 1, 2024 - Present

Provides remote and on-site IT support for hardware, software, and networking issues. Configures and maintains Active Directory, VPN connections, and domain services. Deploys and supports VoIP solutions for business clients. Designs and develops a backend Property Management System (PMS) integrated with the Channex API.

IT Service Technician at Plaisio

January 1, 2024 - September 1, 2024

Diagnosed and repaired desktops, laptops, and mobile devices. Performed hardware upgrades and preventive maintenance. Managed repair workflows and customer requests through the company’s CRM. Provided technical support and assistance to customers, resolving hardware/software issues efficiently and documenting outcomes for follow-up.

Various Roles (Waiter, Barista, Cashier) at Hospitality Industry

September 1, 2019 - September 1, 2023

Delivered customer service in high-pressure environments. Managed cash handling and shift responsibilities. Coordinated daily operations and supplier communication, ensuring smooth service delivery and adherence to workplace procedures.