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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 6 years

- React.js 4 years
- PHP 9 years
Other skills
- Git 8 years

- GitLab 8 years
- PhpStorm 6 years

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
JavaScript
React.js
Vue.js
MongoDB
Docker
AWS
Node.js
Express.js
- Microservices
Postman
AWS S3
Azure
Tailwind
Nest.js
- API
Git
Ajax
JSON
PhpStorm
Vite
Axios
OpenStreetMap
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
Symfony
MySQL
CodeIgniter
- Microservices
Postman
Tailwind
Doctrine ORM
Angular
- API
Git
Ajax
JSON
REST API
PhpStorm
YAML
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
Symfony
MySQL
JavaScript
jQuery
TypeScript
Zend
Doctrine ORM
Angular
- API
Ajax
- HTML / CSS
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
HTML
WordPress
- API
Ajax
Education
MSc.Economy
Academia de Studii Economice din București · 2004 - 2010
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