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Mehdi HeydariMH

Mehdi Heydari

Senior Software Engineer

€150/day
Istanbul, TR
8-15 years

Average response time: 1 hour

About Mehdi

Software Engineer with 7+ years of experience designing, building, and optimizing web applications, with a strong focus on API integration, financial systems, and legacy code improvement.
Experienced in developing and integrating complex backend systems, including payment and accounting workflows (Stripe, QuickBooks, Sage), as well as aggregating multiple external APIs into unified platforms. I’ve consistently worked on improving system performance by refactoring legacy codebases, enhancing search and reporting capabilities, and building more maintainable architectures.
Skilled in designing RESTful APIs, handling third-party integrations, and delivering reliable backend solutions used in production environments—from booking systems to e-learning platforms supporting 1,000+ users.
Strong background in PHP (Laravel), MySQL, and Node.js, with the ability to work across the stack when needed. I focus on writing clean, maintainable code and solving real-world engineering problems, especially in systems that require scalability, reliability, and continuous improvement.

Familiar with AI-forward development practices, including AI tools and LLM-enhanced workflows in modern SaaS applications.
  • English

    Fluent

  • Turkish

    Fluent

  • Persian

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • Team Procure
    Senior Software Engineer
    TECH
    September 2021 - April 2026 (4 years and 7 months)
    Istanbul, Türkiye
    A SaaS platform for managing procurement workflows, tenders, and purchasing operations.
    • Built and maintained customer-facing SaaS features across backend services and user-facing workflows, working closely with product and customer-facing teams.
    • Owned backend development for payment and financial integrations including Stripe, Sage, and QuickBooks, supporting critical business workflows.
    • Delivered end-to-end product features, contributing from system design and backend architecture to user-facing functionality, with a strong focus on code quality and maintainability.
    • Initiated and delivered legacy code refactoring, resulting in 2× faster search and reporting.
    • Took ownership of a production platform during a team transition, leading stabilization efforts that improved reliability and customer experience.
    • Maintained and improved a real-time Node.js microservice supporting event-driven customer facing workflows and production traffic.
    JavaScript PHP Laravel Node.js MySQL
  • Mahak Learning Group
    Full Stack Developer
    EDUCATION AND E-LEARNING
    October 2019 - August 2020 (10 months)
    • Modernized legacy e-learning web application by replacing Flash-based video playback with browser-compatible iSpring support.
    • Extended third-party media player behavior to support RTL languages, improving user experience for Farsi educational content.
    • Developed a MathJax-based math editor, enabling students and teachers to input and render formulas in the web application.
    JavaScript PHP CSS3 DevOps Docker
  • KIMIA TEB
    Software Developer
    MEDICAL
    April 2019 - October 2019 (6 months)
    Automated insurance verification by integrating external APIs, reducing reliance on paper-based processes.
    JavaScript PHP Laravel Linux Nginx

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Education

  • Master of Software Engineering
    Seraj University
    2018
    Master of Software Engineering
  • Bachelor of Software Engineering
    UCNA
    2015
    Bachelor of Software Engineering

Skill set

Categories