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Senior PHP Developer

DongIT

Leiden
Full-time
5-10 years experience
Hybrid

Key Skills

PHP
MVC
HTML
CSS
JavaScript
jQuery
Linux/Unix
Object-Oriented Programming
Laravel
Symfony
CakePHP
Drupal
Python
Java
Web Application Security
Vulnerability Remediation

Job Description

Roll up your sleeves and get ready to design, develop, and secure advanced web applications. At DongIT, you can work on projects ranging from intricate systems for our high-end clients to our own powerful in-house platform Security Reporter. Apply Now Working at DongIT Description Developing at a senior level means your programming code is structured and reliable. You are highly accurate, and your knowledge is up-to-date through work experience, education, or your relentless interest. You use frameworks or other existing code because you recognize its added value. Identifying vulnerabilities in PHP code is part of your expertise, but you also house the skill set to fix these issues appropriately. Your passion for information security is what drives your work, and your hacker mindset is what you bring to the table. Requirements Academic level of technical education completed (BSc/MSc/PhD). Knowledge base: Extensive PHP and MVC knowledge. HTML, CSS, JavaScript, and jQuery. Linux/Unix systems. Familiar with the latest development techniques and coding structures. Experience: 5+ years in a relevant line of work. Object-oriented programming. Development frameworks, such as Laravel, Symfony, CakePHP, and Drupal. Other programming languages, such as Python and Java. Passion for information security, with a hacker mindset. What you enjoy Coding in an accurate and structured style. Translating your creativity to output. Thinking along with the company and providing fresh ideas. Working in a fast-paced team where collaboration will move you ahead. What we have to offer Large and challenging web development projects. High-end laptop. A platform and encouragement for your own initiative and input. Time and budget to follow training and courses. An opportunity to build on your track record and your development skills. Possibility of hybrid working arrangements with flexible working hours. Comfortable workplace in the center of Leiden, just a 5-minute walk from the central station. Travel compensation or an NS train card. Market-based salary, dependent on experience and level of education. Pension plan and other enticing bonus models. Apply Now Note: Acquisition in response to this vacancy is not appreciated. We do not accept candidates through third parties, including recruitment parties, employment agencies, headhunters, and outsourcing organizations.

Core Responsibilities

Design, develop, and secure advanced web applications, writing accurate, structured, and reliable code using PHP, MVC, and development frameworks. Identify vulnerabilities in PHP code and remediate them appropriately, while contributing security expertise and ideas to collaborative projects.

Requirements

Requires a completed technical degree at BSc, MSc, or PhD level and at least five years of relevant experience. Candidates should have extensive PHP and MVC knowledge, experience with object-oriented programming and development frameworks, familiarity with web technologies and Linux/Unix, and a strong interest in information security.

Benefits

  • High-End Laptop
  • Training and Course Budget
  • Flexible Working Hours
  • Hybrid Working Arrangements
  • Travel Compensation or Train Card
  • Pension Plan
  • Bonus Models

About DongIT

Industry: Computer and Network Security

Company size: 11-50 employees

DongIT is an independent Dutch cybersecurity company, founded in 2012 and based in Leiden. We specialize in senior-led penetration testing and security assessments for web applications, APIs, cloud environments, networks, mobile apps and OT systems. Our pentests are performed exclusively by certified specialists (OffSec) working under a four-eyes principle, with methodologies aligned with OWASP, NCSC guidelines and emerging Dutch government standards. DongIT holds the CCV Keurmerk Pentesten and is ISO/IEC 27001:2022 certified, and we are a member of ECSO and Security Delta (HSD). More than 500 organizations rely on our work, from SMEs to banks, government bodies and international technology companies. What sets DongIT apart is the combination of offensive security expertise and deep software engineering knowledge. We understand how software is built, not just how it breaks. That makes our findings concrete, reproducible and directly actionable for the teams that need to fix them. That engineering DNA also produced Security Reporter: our self-hosted, all-in-one pentest assessment and reporting platform, in development since 2020 and used by security teams across Europe. It supports the full assessment workflow, from testing and collaboration to retesting and branded PDF and CSV exports. Learn more: • dongit.eu — company • websecurityscan.eu — pentesting services • securityreporter.app — Security Reporter platform

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