Web Developer; Python​/CSS

Position: Web Developer (Python/CSS)
Location: Town of Belgium

Web Developer (Python/CSS)
Job details

Professional Services Relocation Position Full-time

We are looking for a
** Web Developer** (Python/CSS).
** What you'll do:
*** Develop and maintain a front-end web application (AskNRA) used for IP database reporting across multiple NATO security domains.
* Build and implement modular, high-quality user interfaces using Python, CSS, and related technologies.
* Ensure development follows strict constraints, avoiding third-party CDNs or unapproved external packages, relying only on NATO-approved libraries.
* Participate in Agile sprint cycles, including sprint planning, execution, review, and reporting.
* Support weekly in-person coordination meetings, workshops, and status reviews.
* Deliver sprint reports and maintain accurate technical documentation aligned with configuration management practices.
* Develop and enhance key application features such as responsive web pages, interactive dashboards, real-time data streaming, email integration, file upload functionality, and PDF generation.
* Support data comparison activities (exception reports) and assist with integration and maintenance tasks.
* Work closely with Service Delivery Managers and contribute to continuous improvement of development processes.
* Ensure high-quality code delivery aligned with project standards and operational requirements.
** What you will need to bring:
*** Strong experience (minimum 4 years) in developing WSGI-based web applications using Python and Flask.
* Solid knowledge of Flask Blueprints, Jinja2, CSS (Bootstrap), JavaScript, jQuery, AJAX, and SQLite.
* Experience building dynamic and responsive front-end interfaces with partial page reloads and AJAX-driven interactions.
* Good understanding of frontend modularity, maintainability, and interface documentation best practices.
* Strong problem-solving skills with the ability to work independently and take ownership of tasks.
* Ability to collaborate effectively within cross-functional teams and Agile environments.
* Excellent communication skills in English, both written and spoken.
* Self-motivated, detail-oriented, and focused on delivering high-quality results.
* Knowledge of NATO structures and working environments is considered an asset.
* Holds, or is eligible to obtain, a national security clearance as a citizen of a NATO member state.
* Availability to work in a hybrid model in Belgium.
** What can Syone offer:
*** Integration in an organization with profound and sustained growth and involvement in pioneering projects with innovative technological solutions;
* Strong IT training plans;
* Professional evolution with intervention in ambitious technological projects, both national and internationally.

By applying, you accept our GDPR policies. Your personal data in your CV and documents will be used solely for processing your application NE, S.A. (NIPC ) is the data controller, located at Rua Alfredo da Silva, 8-A, Edifício Stern, Piso 3D,  Amadora. We will use your data to tailor your application to relevant vacancies and for potential employment contracts. If selected, your data will be kept during your employment and for at least two years after.

If not selected, your data will be kept for two years for future vacancies and then deleted, except for your contact details. You can exercise your rights (access, rectification, erasure, etc.) by emailing  Your data may be shared with our HR service providers and will be stored securely. You can withdraw your consent at any time. We will not use your data for other purposes without your express consent.

For more information, email
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