Job Summary: We are seeking a Senior Full Stack Developer with experience in software development and systems support to join our IT team in Madrid. Key Highlights: 1. Hybrid role combining software development and systems support. 2. Proficiency in PHP, MySQL, and JavaScript (Full Stack). 3. Maintenance and evolution of internal applications. **Senior Full Stack Developer with IT Support** At **ONEtoONE Corporate Finance**, a leading firm advising on mergers and acquisitions (M\&A), we are looking for a hybrid profile bridging software development and systems support to join our IT team in Madrid. **What will your main responsibilities be?** **Software Development and Maintenance (Primary Focus ~70%):** * Developing new features, updates, and bug fixes on our core technology stack: **PHP, MySQL, and JavaScript (Full Stack)**. * Maintaining and evolving our internal applications, ensuring their performance and stability. **Infrastructure and User Support (~30%):** * Administration of **Debian** servers; maintenance of services such as **Apache, Nginx, and MySQL**. * Comprehensive maintenance of the office’s technological infrastructure. * Technical support to end users for hardware installation and configuration, and for incident resolution. * Management of basic security measures: access control and VPN maintenance. **What profile are we looking for?** **Essential:** * Demonstrable experience of **at least 2\-3 years in a similar role combining development and support.** * **Proficiency in the technology stack:** PHP, MySQL (or MariaDB), and JavaScript (Full Stack). * Experience developing with **Vibe Coding**. Experience with **Claude Code** is particularly valued. * Basic knowledge of **Linux system administration (preferably Debian)**. **Highly Desirable:** * Experience with **Node.js**, version control using **Git**, and familiarity with **Docker**. * Higher Vocational Training Degree (DAW, DAM, ASIR) or Bachelor’s Degree in Computer Engineering. Working hours: Monday to Thursday, 9:00–18:00; Friday, 8:00–15:00. Intensive schedule in July and August: 8:00–15:00. Employment type: Full-time, Permanent contract Salary: €28,000.00–€36,000.00 per year Benefits: * Offered language courses * Company events * Training program * Optional remote work Work location: On-site employment