PHP/C Developer

HumanInTech; Brussel Hoofdstad; Hybrid; EUR 45,000 - 75,000; Full time

Job summary

HumanInTech is seeking a software engineer to drive a modernization project migrating data from mainframes to a modern open architecture. You will design, develop, and test applications using PHP, C, and JavaScript, ensuring high availability and robust documentation.

Role requires 3–5+ years of experience, strong server-side C, PHP expertise, and fluency in Dutch, French, and English. The assignment is hybrid in Brussels, with both freelance and employee options and a 40-hour work week.

Qualifications

• 3–5 years of professional software development experience.
• Proven expertise in PHP, JavaScript, C#, and C on server side.
• Experience in Linux RedHat environments and TCP/IP networking.
• Familiarity with REST/SOAP web services and PHP-based integrations.
• Hands-on knowledge of AngularJS, Ajax, jQuery and CodeIgniter; Git and DevOps practices.
• Excellent written and verbal communication; able to document clearly.

Responsibilities

• Design, develop and test applications from functional and technical analyses.
• Maintain and improve PHP and C applications in a high-availability environment.
• Analyze user needs with functional analysts to refine requirements.
• Keep up with evolving tech and provide technical guidance.
• Suggest improvements to existing solutions and projects.
• Write and maintain technical documentation.
• Provide maintenance and technical support for applications.

Skills

PHP (5.6/7/8)

JavaScript

C#

Xamarin

C (server-side)

Linux RedHat

TCP/IP

REST/SOAP

AngularJS/Ajax/jQuery

CodeIgniter

GIT

DevOps

Strong communication

Autonomy

Adaptability

Teamwork

Documentation

Creative problem solving

Stress-resilience

Customer focus

Education

Bachelor's degree or higher

Tools

GIT version control

Job description

What you will do

You will work within a multidisciplinary team of internal and external staff on a modernisation project aimed at reducing dependency on mainframe systems by migrating data to a modern, open architecture. This migration makes data more accessible for search applications, analytical solutions, artificial intelligence and intelligence-led operations.

Your main responsibilities include:

• Designing, developing and testing applications based on functional and technical analyses


• Maintaining and improving PHP and C applications in a high-availability environment


• Analysing user needs in collaboration with functional analysts


• Following technological evolutions and providing technical advice


• Proposing improvements and adjustments to existing solutions and projects


• Writing and maintaining technical documentation


• Providing maintenance and technical support for applications

What we are looking for

Technical skills:

• Expert-level knowledge of PHP 5.6, PHP 7 and PHP 8, JavaScript, C#, Xamarin


• Expert-level programming in C at server level, including asynchronous programming (threads)


• Confirmed knowledge of Linux RedHat server environments


• Good knowledge of network protocols, particularly TCP/IP


• Knowledge of using web services (REST, SOAP) from PHP applications


• Knowledge of environments such as Angular JS, Ajax, jQuery, various PHP frameworks (CodeIgniter), GIT, DevOps

Soft skills:

• Strong written and verbal communication skills


• Ability to work autonomously and take initiative


• Ability to respond quickly to changing circumstances


• Team-oriented and collaborative mindset


• Methodical and accurate working style
  
• Ability to document and report results clearly


• Creative, constructive and solution-oriented


• Stress-resistant


• Customer-focused attitude

Languages:

• Active knowledge of Dutch, French and English

The setting

This assignment runs from 1 November 2026 to the end of December 2026, with the possibility of extension. You will work full-time (40 hours per week) in a hybrid setting, with a minimum presence at the office in Brussels twice a week, depending on tasks and in consultation with the team. Remote work is permitted within Belgium.

You can join us for this assignment as a freelancer or as an employee of HumanInTech. Same role, same team. If you join as an employee, your employment continues beyond this assignment. When it ends, we’ll work together to find your next assignment.

Location: Brussels, hybrid

Work address: Belgium

Employer / contracting party: HumanInTech

Applications close (Brussels time): October 19, 2026 at 2:00 AM

Engagement: Freelance or employed by HumanInTech

Working hours: Full-time

Experience: 3–5 years or more

Education: Bachelor's or more

Published: October 2026