Konuralp YOLGECEN

Freelance / Full-Stack PHP Symfony Developer

As a freelance PHP/Symfony developer, I support companies in building, improving and maintaining custom web platforms. I focus on robust back-end architecture, reliable integrations, database performance, DevOps workflows and pragmatic technical consulting.

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Full-Stack PHP Symfony Developer - Crop and Co

Lyon, France (Since February 2022)

At Crop and Co, I work on OKAVEO, a SaaS purchasing management platform for private companies, public organizations and hospitals.

🚀 Technical Modernization

• Symfony migrations 4.4 -> 5.4 then 5.4 -> 7.4 LTS, including deprecation cleanup, bundle adaptation and safer application foundations
• Progressive modernization of legacy code: stronger typing, clearer service boundaries, reduced technical debt and more readable domain logic
• Performance optimization on sensitive business workflows, with fewer expensive queries and faster response times
• Refactoring of critical components to improve maintainability, testability and long-term readability

🔗 API Integrations & Automation

• Strategic API integrations: e-Attestations 365, Ellisphere, achat-public, Provigis, HappyOrNot, MARCO (Agysoft), SharePoint
• Secure authentication flows, data mapping and actionable error handling for external exchanges
• Import, synchronization and retry mechanisms to make inter-system data flows more reliable

📦 Product Modules

• Design and development of the Orders module based on BPU price lists, suppliers, contracts and business rules
• Dynamic user interfaces to streamline order management and reduce manual operations
• Calculation, validation and control rules to secure purchasing workflows

📊 Data & Performance

• Custom MySQL exports for business analysis and operational monitoring
• Dashboards and indicators to make KPIs clearer for business users
• Query optimization, targeted indexing and volume analysis for critical processing paths

⚡ Delivery & Collaboration

• Agile Scrum collaboration with CTO, PO, QA and development team
• Bug fixing, incident analysis and continuous optimization for a more stable user experience
• GitLab CI/CD, code reviews and QA coordination for safer production releases

Full-Stack PHP Symfony Developer - Crop and Co

I joined Crop and Co as a Full-Stack PHP Symfony apprentice before moving into a permanent role. I contributed to the development and optimization of OKAVEO, a SaaS platform used by private companies, public organizations and hospitals to manage purchasing operations.

🚀 Training, ownership and progression

• Started through a work-study program with full immersion in a production SaaS project
• Progressed into a permanent role thanks to technical contribution and growing product ownership
• Participated in code reviews and helped improve development practices

⚡ Modernization and refactoring

• Symfony 3.4 -> 4.4 migration, improving compatibility, maintainability and application performance
• Optimization of legacy code, response times and expensive database queries

🔗 Infrastructure and deployment

• Creation and maintenance of a staging environment with Deployer
• Automation of deployment workflows through GitLab CI/CD

📊 Big data and performance optimization

• Handling large data volumes with Elasticsearch and query improvements
• Analytical dashboards and BI indicators through ETL and Data Warehousing workflows

🔧 Database administration and optimization

• Maintenance and optimization of MySQL databases
• Advanced indexing to speed up data access and heavy processing

ICT Volunteer

• Network and telecommunications infrastructure support inside the stadium
• Technical assistance for FIFA staff and operational teams
• IT equipment management and incident resolution during the event

Store Associate / Model

🎯 Main responsibilities

• Customer welcome, sales support and personalized advice
• Merchandising, stock management and product display
• Brand image representation as an in-store model

ICT Volunteer

🔧 Main responsibilities

• Installation and maintenance of IT equipment during the event
• Technical support and incident handling for operational teams
• Network and telecommunications deployment and configuration

Events - Commercial Animation

Various short missions as a brand promoter, host and event support staff.

Service Manager - Cash Desk Manager

Cash desk and service management at the ferry port and onboard ferries connecting Bursa and Istanbul.

C.E.S.I. | Lyon

Work-study program focused on software architecture, information systems, DevOps practices, performance, databases and Agile project methods.

C.E.S.I. | Lyon

Advanced development in PHP, Symfony and JavaScript, database design, MVC applications, clean code and software craftsmanship.

Université Clermont Auvergne | Clermont-Ferrand

Programming fundamentals, algorithms, object-oriented programming, Linux administration, networks, web development and relational databases.

Blaise Pascal University | Clermont-Ferrand

Diplomas obtained: A1 (2012-2013 S2), A2, B1 and B2.

CAVILAM Alliance Française | Vichy

A1.1 level certification.

Ahmet Rustu High School | Bursa, Turkey