Stefan S.

Fullstack Developer

Stefan is a Fullstack Developer with nine years of commercial experience, combining a strong background in PHP with modern fullstack JavaScript expertise. Over the past four years, he has specialized in React.js and Node.js to deliver scalable and maintainable applications.

At Happening, he develops high-performance systems integrating third-party gaming APIs using React, Node.js, and TypeScript, supported by Docker and AWS.

Stefan’s earlier experience with PHP frameworks such as Symfony and CodeIgniter provides a solid foundation for backend architecture, while his modern JavaScript stack expertise enables him to build robust, user-centric applications that meet complex business requirements.

Main expertise

  • JavaScript
    JavaScript 6 years
  • React.js
    React.js 4 years
  • PHP
    PHP 9 years

Other skills

  • Git
    Git 8 years
  • GitLab
    GitLab 8 years
  • PhpStorm
    PhpStorm 6 years
Stefan

Stefan S.

Romania

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Selected experience

Employment

  • Software Engineer

    Happening - 4 years 2 months

    Happening is a software development company specializing in gaming, entertainment, and management systems, delivering advanced solutions for online gaming platforms, slot management, and digital betting operations. The company focuses on scalability, security, and performance for high-traffic gaming environments.

    • Designed and developed internal management software to meet business and operational requirements across multiple departments.
    • Integrated third-party systems and gaming providers such as Newton and Omniplay, ensuring seamless interoperability with internal tools for slot and bet ticket management.
    • Collaborated with cross-functional teams to design modular, scalable architectures for backend and frontend components.
    • Deployed and maintained containerized applications using Docker, leveraging AWS and Azure Active Directory (AD) for authentication and cloud infrastructure.

    Technologies:

    • Technologies:
    • PHP PHP
    • JavaScript JavaScript
    • React.js React.js
    • Vue.js Vue.js
    • MongoDB MongoDB
    • Docker Docker
    • AWS AWS
    • Node.js Node.js
    • Express.js Express.js
    • Microservices
    • Postman Postman
    • AWS S3 AWS S3
    • Azure Azure
    • Tailwind Tailwind
    • Nest.js Nest.js
    • API
    • Git Git
    • Ajax Ajax
    • JSON JSON
    • PhpStorm PhpStorm
    • Vite Vite
    • Axios Axios
    • OpenStreetMap OpenStreetMap
    • GitLab GitLab
  • PHP Developer

    Expert Software - 3 years 4 months

    Expert Software is a Romanian software company specializing in enterprise-level systems, EDI (Electronic Data Interchange) platforms, and digital transformation solutions. The company provides customized, high-performance software for retail, logistics, and supply chain management.

    • Worked on the company’s core EDI platform, facilitating the exchange of thousands of documents per hour between retailers and suppliers, including invoices, receptions, and corrections.
    • Led the migration of the base code from CodeIgniter to Symfony, significantly improving processing performance and scalability to handle higher data volumes.
    • Developed new modules for invoice and reception processing, including logic to automatically generate correction documents such as debit and credit notes.
    • Contributed to the architectural redesign of the platform, building it as modular components for easier maintenance, updates, and scalability.

    Technologies:

    • Technologies:
    • PHP PHP
    • Symfony Symfony
    • MySQL MySQL
    • CodeIgniter CodeIgniter
    • Microservices
    • Postman Postman
    • Tailwind Tailwind
    • Doctrine ORM Doctrine ORM
    • Angular Angular
    • API
    • Git Git
    • Ajax Ajax
    • JSON JSON
    • REST API REST API
    • PhpStorm PhpStorm
    • YAML YAML
    • GitLab GitLab
  • PHP Developer

    Beler Soft - 1 year 4 months

    Beler Soft is a Romanian software development company specializing in custom web applications, enterprise software, and medical information systems. The company delivers end-to-end digital solutions tailored to client requirements across healthcare, business, and government sectors.

    • Developed and maintained custom PHP applications based on client specifications, ensuring scalability and data integrity.
    • Performed cross-testing, debugging, and bug fixing, improving overall application stability and performance.

    Key Projects:

    • Developed an advanced platform to manage relationships between doctors and patients.
    • Implemented CRUD operations for patients, prescriptions, appointments, and biometric measurements (e.g., BPM, blood sugar).
    • Built data visualization features using interactive charts and improved both the patient and doctor modules.

    Medical Application (Zend 1):

    • Enhanced an existing healthcare management system by developing an API layer to support multiple integrations and streamline communication between services.

    Technologies:

    • Technologies:
    • PHP PHP
    • Symfony Symfony
    • MySQL MySQL
    • JavaScript JavaScript
    • jQuery jQuery
    • TypeScript TypeScript
    • Zend Zend
    • Doctrine ORM Doctrine ORM
    • Angular Angular
    • API
    • Ajax Ajax
    • HTML / CSS
    • GitLab GitLab
  • Software Developer

    H GRUP IT EXPERT - 1 year 2 months

    H Grup IT Expert is a Romanian software development and IT consultancy company delivering custom applications, database systems, and digital solutions to clients across finance, logistics, and public administration sectors.

    • Designed and developed custom software applications based on specific client requirements.
    • Created and optimized database structures.
    • Conducted testing, debugging, and maintenance of existing systems to ensure reliability and performance.

    Technologies:

    • Technologies:
    • PHP PHP
    • HTML HTML
    • WordPress WordPress
    • API
    • Ajax Ajax

Education

  • MSc.Economy

    Academia de Studii Economice din București · 2004 - 2010

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