**Company Description:** The Employment Service operated by Comfama is the platform that connects people with companies offering job opportunities and seeking talent to contribute to their growth and consolidation. The vacancies published by Comfama Employment Service correspond to employment opportunities offered by companies in various sectors, located in Medellín and Antioquia. If you are interested in consulting vacancies to connect professionally with Comfama, we recommend visiting our website www.comfama.com, option "Work with Us". **Job Functions:** COMPAÑIA DE INVERSIONES Y SERVICIOS S.A.S. is seeking experienced personnel with a minimum of 12 months of experience to join its team as a back-end developer. **Academic Requirements:** Graduate technologist or professional in systems, systems engineering, or software development. **Specific Responsibilities:** * Perform analysis, design, programming, adjustment, updating, and documentation of software, applications, and databases. * Develop and maintain backend services using Node.js, focusing on relational databases, REST API design, and real-time communication via WebSockets. * Participate in the integration of hardware and peripheral devices. * Apply methodologies and standards throughout the complete software development lifecycle. * Maintain and optimize data architecture. **Knowledge Required:** * Design, modeling, optimization, and maintenance of relational databases. * Development of RESTful APIs and consumption of external services. * Implementation of real-time communication via WebSockets/socket.io. * Interaction with physical devices (I2C interfaces, GPIO control, QR readers, UHF antennas). * Basic knowledge of Linux systems and remote connection via SSH. * Basic understanding of networking (IPs, ports, firewalls, device configuration). * Development in C, C\+\+, Java, Python, .Net, MySQL, SQL Server, MongoDB, Docker. Development in HTML5, CSS, JavaScript, PHP. * Agile methodologies (SCRUM). * UML language. **Salary:** $3\.500\.000 \+ performance bonus \+ statutory benefits. **Working Hours:** Monday to Friday from 6:30 a.m. to 4:30 p.m. No work on Saturdays, except for support cases. **Contract Type:** Fixed-term. **Work Location:** Medellín, Antioquia. **Requirements:** Minimum of 12 months of experience **Offer Conditions:** **Monthly net salary:** 3500000