Seli̇mhan Yildirim

Full-Stack Web Developer with 4+ years of experience building scalable, high-traffic RESTful APIs and microservices within the PHP/Laravel ecosystem. Applies SOLID principles and a clean Repository–Service architecture to deliver maintainable, well-tested code. Hands-on experience integrating payment gateways (Iyzico, Stripe), messaging/queue systems (Redis, RabbitMQ, Laravel Queues), search engines (Algolia, Elasticsearch), and a wide range of third-party services.

Delivered production systems serving tens of thousands of active users, with measurable results including 30%+ response-time improvements and 90%+ automated test coverage (PHPUnit/Pest). Comfortable working across the stack (HTML, CSS, JavaScript, Node.js) and collaborating with product, mobile, and DevOps teams.

Full-Stack Developer at Spechy (2025-10 – Present)

• Develop core modules for Spechy's multi-channel communication and CRM platform using Laravel and a clean Repository–Service architecture.
• Design automated workflows that generate call lists, route leads to the appropriate agents, and streamline outbound calling operations.
• Build and maintain two-way integrations for WhatsApp, Instagram, Facebook, and VoIP, keeping call logs, messages, recordings, and transcripts synchronized within the CRM.
• Enhance system performance through MySQL query optimization and Redis-based caching/queue processing for real-time message and call event handling.
• Set up and maintain GitHub Actions pipelines for automated testing and deployment.
• Collaborate with product and frontend teams to improve agent workflows and reporting accuracy; contribute to code reviews and support junior developers.

Full-Stack Developer at Smartup Network (2024-04 – 2025-10)

• Architected and maintained scalable modules for the company's loyalty platform using PHP 8 / Laravel 10 and a rigorous Repository–Service pattern.
• Built responsive admin dashboards and client-facing portals with HTML5, CSS3, JavaScript, and Bootstrap.
• Published well-documented RESTful JSON APIs powering native iOS and Android apps, supporting real-time transaction management for tens of thousands of active users.
• Optimized complex MySQL queries and introduced caching layers, reducing average response times by more than 30%.
• Set up and maintained CI/CD pipelines (GitHub Actions) to automate testing and deployment, involved in the release process.
• Wrote comprehensive PHPUnit and Pest tests achieving 90%+ coverage; drove SOLID-compliant code reviews and mentored junior developers.

Backend Developer at Prodrom ICT Solutions (2023-03 – 2024-04)

• Developed modular, scalable backend applications for multiple enterprise projects using PHP and Laravel.
• Architected and modeled MySQL databases; applied indexing and eager loading to improve data access performance, and managed backups, migrations, and seed processes.
• Implemented dynamic form validation and AJAX-based updates with jQuery; built responsive UIs with HTML5/CSS3.
• Designed secure, consistent JSON-based RESTful endpoints with authorization, error handling, and validation layers for the front-end team.

Backend Developer at Fırat University Digital Transformation and Software Office (2022-09 – 2023-03)

• Developed backend applications using PHP and Laravel to support multiple university-wide digital transformation projects.
• Managed and maintained MySQL databases, and built algorithms to optimize university processes.
• Specialized in SOAP and REST APIs, using Swagger to document and streamline API development.
• Established the largest inter-university API data distribution platform in Turkey, enabling data sharing across institutions.

B.Sc. in Software Engineering – Fırat University (2016-09 – 2022-06)

Artificial Intelligence Engineering and Data Science – Fırat University (2026-01)

Web Design and Coding – Anadolu University (2018-09 – 2020-06)