App Developer

Job Title: APP Developer / Architect

Language: English, Dutch or French

Location: Belgium, Belgium

Duration: As soon as possible - 31/03/2026

Work Mode: Fully onsite

Work regime: Full time

Job Description - Roles and Responsibilities

Who are we?

Client celebrated its 90th anniversary in 2024 and remains true to its historic model: many players, with moderate stakes, a naturally responsible range of iconic and traditional games, and strong engagement from all Belgians, particularly thanks to its support for various charities.

Client was lucky... and was ready: €1.666 billion in stakes in 2025 – a record level

\"Being ready\" is primarily a matter of capacity. In concrete terms, this means we must be able to handle very high peaks of activity, up to 5,000 participants per minute at any given time.

This capacity is based on a solid ecosystem: a dense network of points of sale, a growing online presence (primarily mobile), and an app that has become a reflex for many players. The connection between retail and digital has been strengthened by very concrete actions that have now become established habits: consulting, scanning, buying, checking.

In addition to core games like EuroMillions – the most-played game in 2025 with 67.3 million playthroughs (across all channels) – and the revamped Lotto with the dream house that can be won once a month, on the last Saturday of the month, this momentum is also continuing across the rest of the offering. Instant lottery games are reaffirming their popularity, continuing to grow, and contributing to overall sustained sustainable growth. Finally, the fourth pillar is also confirmed: the other traditional draw games. These continue to perform well and strengthen the balance in Client's game offering.

This record year confirms the strength of the \"hybrid\" model, in which the local network and the digital world reinforce each other. The retail channel remains the largest: €1,172 million in sales in %), representing 70.3% of stakes across 6,748 points of sale. Online sales continue to grow: €494 million (+19.6%), representing 29.7% of stakes, with a focus on mobile use (76.2% via the app).

\"We've grown into one of the largest e-commerce ecosystems in the country. And yet our greatest strength remains the same: a lottery of proximity, both physically and online,\" says Jannie Haek, CEO of Client.

Record revenue and a record number of game plays also lead to an increase in total winnings. In 2025, National Lottery players experienced 117.2 million winning games, resulting in €1.266 billion in winnings. The number of winnings paid out increased by 17% compared to 2024, and the average winnings increased by approximately €1.

But you never win alone with Client. The basic principle of a public lottery is that individual luck is part of a collective model: Winners don't walk away with all their stakes; a portion of them flows back into society. This way, luck ultimately benefits everyone: the winners... and society.

\"A record turnover is fantastic. But our true pride is that we remain a popular, responsible lottery that serves the country. With Client, you never win alone,\" concludes Jannie Haek.

APP FOR RETAIL

• We are building a native mobile application (Android + iOS) for communicating to our Retailers.
• The goal is to build a closer relationship with our Retailers with clear communication via an easy and fast accessible mobile app. The user-base would be around 15k to 20k users. While the first fase focused on communication, we are working on a roadmap to to implement richer and more complex functionalities like scanning with camera, integrations for payments,…
• We have started with a solid foundation which will need enriching and in light of this, we are looking for a developer profile, in order to support the already existing foundation during acceptance testing, implement fixes if needed.

Experience:

• Front-end mobile development
• Back-end mobile development
• API integrations (with Dynamics 365 + Adobe Experience Manager, Entra ID B2C)
• Azure Integration Services (Azure Functions, Azure Logic apps, APIM)
• IT security

Skills

• Adobe AEM – Confirmed, most recent experience this year
• Azure – Confirmed, most recent experience this year
• Dynamics 365 – Confirmed, most recent experience this year
• Mobile Application – Confirmed, most recent experience this year
• Security Expertise – Confirmed, most recent experience this year

Languages

• Dutch or French – Native
• English – Active knowledge

Locations

• Main address: 25 rue Belliard, 1000 Brussels