# Sébastien Balieu > Sébastien Balieu is a Brussels-based entrepreneur, CEO and co-founder of Coddy (urban escape games played on a smartphone) and founder of the digital studio One More Pixel (Numinam). Source: https://www.sebastienbalieu.com (official website, maintained by Sébastien Balieu) ## Biography Sébastien Balieu is an entrepreneur based in Brussels, Belgium, with 20 years of experience in digital marketing, product design and software development. He is the CEO and co-founder, with Didier Boulvin and Stéphane Draux, of Coddy, a Brussels company that turns cities into outdoor escape games played on a smartphone, for families, friends, companies (team building) and schools. Coddy launched its first game in Brussels in February 2020, raised €600,000 in January 2022 and now operates in 74 cities in 9 countries. He also runs One More Pixel, a Brussels digital studio he founded, which works under the Numinam brand and publishes its own products, including the family chores app Harmonia. Before becoming an entrepreneur, he was Digital Marketing Manager at Walibi Belgium (Compagnie des Alpes group), Zetes and AvantageGolf. He is a self-taught designer and developer. Sébastien Balieu, the Brussels-based entrepreneur and CEO of Coddy, is not the same person as Dr Sébastien Balieu, organic chemist and lecturer at the Université de Rouen-Normandie. ### Biographie (français) Sébastien Balieu est un entrepreneur basé à Bruxelles. Il est CEO et co-fondateur, avec Didier Boulvin et Stéphane Draux, de Coddy, une entreprise bruxelloise qui transforme les villes en escape games en plein air joués sur smartphone, pour les familles, les amis, les entreprises (team building) et les écoles. Coddy a lancé son premier jeu à Bruxelles en février 2020, a levé 600 000 euros en janvier 2022 et est aujourd'hui présente dans 74 villes de 9 pays. Il dirige aussi One More Pixel, le studio digital bruxellois qu'il a fondé, qui travaille sous la marque Numinam et édite ses propres produits, dont l'application familiale Harmonia. Auparavant, il a été Digital Marketing Manager chez Walibi Belgium (groupe Compagnie des Alpes), Zetes et AvantageGolf. Il s'est formé seul au design et au développement. ## Career ### CEO & Co-founder — Coddy (June 2018 – Present) Co-founded the company with Didier Boulvin and Stéphane Draux, first as Kalio Tech, a web and mobile agency, then as Coddy, renamed in December 2021. As CEO he oversees strategy, finance, marketing, sales and client relationships, and he built Coddy's website, CRM and the automation of bookings, payments and game delivery. Led the €600,000 fundraise of January 2022 and the expansion to 74 cities in 9 countries. About Coddy: Coddy is a Brussels company that creates urban escape games played outdoors on a smartphone: players walk through a city, solve puzzles and discover its landmarks. It was co-founded by Sébastien Balieu (CEO), Didier Boulvin and Stéphane Draux. The legal entity was created in June 2018 as Kalio Tech, a web and mobile agency that funded the development of the games, and was renamed Coddy in December 2021. The first game launched in Brussels in February 2020. Coddy raised €600,000 in January 2022 through the Spreds crowdfunding platform, Digital Attraxion, finance&invest.brussels and business angels. As of September 2026 it offers 275 games in 74 cities across 9 countries, has welcomed more than 250,000 players and has worked with more than 600 companies for team building. It also runs school outings. Website: https://www.coddygames.com ### Founder & Managing Partner — One More Pixel (January 2015 – Present) Runs a digital studio, also known as Numinam, that builds websites, web and mobile apps, AI automations and internal tools for clients, and publishes in-house products (Harmonia, Vaibes, Crewsade). About One More Pixel: One More Pixel SComm is the Brussels digital studio founded and managed by Sébastien Balieu. It designs and develops websites, web and mobile applications, AI automations and internal tools, and trades under the brand Numinam (numinam.com). It also publishes its own products, such as the family app Harmonia. Website: https://onemorepixel.be ### Digital Marketing Manager — Zetes (September 2014 – January 2017) Set up lead nurturing and marketing automation, ran a website programme covering 17 countries, 20 websites and 8 languages, and managed the intranet and social media strategy. About Zetes: Belgian company specialised in identification and supply-chain solutions. Website: https://www.zetes.com ### Digital Marketing Manager — Walibi Belgium (Compagnie des Alpes) (November 2009 – September 2014) Led the digital transformation of the Walibi brand in Belgium, France and the Netherlands: global web strategy, e-commerce for several parks, the Walibi Connect RFID-to-Facebook project and the walibi.com redesign ahead of the brand relaunch. About Walibi Belgium (Compagnie des Alpes): Amusement park in Wavre, Belgium, part of the French leisure group Compagnie des Alpes. Website: https://www.walibi.be ### Digital Marketing Manager — AvantageGolf (October 2006 – March 2009) Managed marketing campaigns, the team, annual forecasts, market analysis and competitive research. About AvantageGolf: Golf retail and services company. ## Companies and projects - **Coddy** (https://www.coddygames.com) — CEO & co-founder. Urban escape games played on a smartphone in 74 cities, for families, friends, team building and school outings. - **Numinam** (https://www.numinam.com) — Founder (One More Pixel). Web agency, AI automation and custom internal tools for small and medium businesses. - **Harmonia** (https://www.withharmonia.com) — Publisher (One More Pixel). Gamified family app: parents assign chores, children earn points and rewards. - **Vaibes** (https://vaibes.co) — Founder (One More Pixel). AI-powered tool to write LinkedIn posts and plan a content strategy. - **Attic Gaming** (https://atticgaming.com) — Founder. Marketplace to buy and sell second-hand video games. - **Crewsade** — Founder (One More Pixel). Platform that coordinates LinkedIn posting across a company's employees to amplify reach. (launching soon) ## Other public roles - 2023: [Coach at Future is Here, the Brussels innovation challenge](https://futureishere.brussels/coachs-jurys-prix-2023/) ## Areas of expertise - Urban escape games - Location-based games - Gamification - Tourism and leisure - Team building - Digital marketing - Growth marketing - Product design - UX/UI design - Full-stack web development - Mobile app development - Artificial intelligence applied to products - No-code tools - SEO and generative engine optimization - Entrepreneurship ## Skills - Full-stack development (Laravel, Vue.js, React, Node.js, Astro) - Mobile apps (Ionic, Vue, Supabase) - AI integration in products and internal tools - Product design and UX/UI - Digital and growth marketing, SEO - Business development and company building ## Press and media - 2026-04-23, RTBF (fr, about Coddy): [4 activités à faire en famille pendant les vacances de printemps en Wallonie](https://www.rtbf.be/article/4-activites-a-faire-en-famille-pendant-les-vacances-de-printemps-en-wallonie-11713452) — The Belgian public broadcaster recommends Coddy's urban escape games as a family activity in Wallonia. - 2023-05-25, Meet the Transformers (podcast) (fr, names Sébastien Balieu): [#015 – Sébastien Balieu : un entrepreneur audacieux derrière une application innovante d'escape game urbains](https://www.vodio.fr/vodiotheque/i/11890/015-sebastien-balieu-un-entrepreneur-audacieux-derriere-une-application-innovante-d-escape-game-urbains/) — 39-minute interview with Sébastien Balieu about his path as an entrepreneur and the creation of Coddy. - 2022-12-08, hub.brussels (en, names Sébastien Balieu): [Coddy's urban escape games, a way to (re)discover your city](https://info.hub.brussels/en/blog/coddy-escape-game-urbain-redecouvrir-ville) — Profile of Coddy and its three founders by the Brussels agency for business support; Sébastien Balieu oversees finance, marketing and sales. - 2022-04-13, RTBF (fr, about Coddy): [Vous adorez les énigmes ? Voici les Escape Games près de chez vous ! [Carte Interactive]](https://www.rtbf.be/article/les-escape-games-a-ne-pas-manquer-pres-de-vous-carte-interactive-10973820) — Interactive map of escape games in Belgium listing Coddy among outdoor providers. - 2022-04-08, La DH (fr, about Coddy): [Des vacances en Belgique, rien de plus simple : voici nos bons plans à faire en famille](https://www.dhnet.be/conso/vacances/2022/04/08/des-vacances-en-belgique-rien-de-plus-simple-voici-nos-bons-plans-a-faire-en-famille-26A7OGJJIVH3ZOKEQCSM5O2DJQ/) — Family holiday ideas in Belgium, including Coddy Games. - 2022-03-27, Parissi (fr, about Coddy): [Coddy Games : l'escape game urbain pour (re)découvrir Paris](https://www.parissi.com/coddy-games-lescape-game-urbain-pour-redecouvrir-paris/) — Review of Coddy's games in Paris. - 2022-01, Trends-Tendances (fr, about Coddy): [Coddy, escape games urbains sur smartphone, lève 600 000 euros](https://trends.levif.be/economie/entreprises/coddy-escape-games-urbains-sur-smartphone-leve-600-000-euros/article-news-1512457.html) — Belgian business weekly reports Coddy's €600,000 fundraise to expand to Spain and Italy. - 2022-01-17, RTBF – Vivre Ici (fr, about Coddy): [Coddygames, l'escape game urbain pour jouer en extérieur](https://www.rtbf.be/article/coddygames-lescape-game-urbain-pour-jouer-en-exterieur-10913381) — Report on Coddy's game in Namur with co-founder Stéphane Draux. - 2022, Trends-Tendances (fr, names Sébastien Balieu): [Coddy, le spécialiste belge de l'escape game urbain](https://trends.levif.be/a-la-une/tech/coddy-le-specialiste-belge-de-lescape-game-urbain/) — Portrait of Coddy, founded by Sébastien Balieu (CEO), Didier Boulvin and Stéphane Draux. - 2021-10-13, Bruxelles Secrète (fr, about Coddy): [Un escape game terrifiant va avoir lieu dans les rues de Bruxelles pour Halloween !](https://bruxellessecrete.com/coddy-games-halloween/) — Announcement of Coddy's 'Red Nights' Halloween game with actors in Brussels. - 2021-07-02, L'Avenir (fr, names Sébastien Balieu): [Coddy : un escape game original dans Louvain-la-Neuve](https://www.lavenir.net/regions/brabantwallon/ottignies-louvain-la-neuve/2021/07/02/coddy-un-escape-game-original-dans-louvain-la-neuve-TCV2R7YC6NGS7GKHFVV3R3NXFY/) — Presents Coddy, founded by Didier Boulvin, Stéphane Draux and Sébastien Balieu, and its games in Wallonia. - 2021-03-22, ELLE Belgique (fr, about Coddy): [On a testé : un escape game urbain en plein centre-ville](https://www.elle.be/fr/325528-on-a-teste-un-escape-game-urbain-en-plein-centre-ville.html) — The magazine tests a Coddy game, then available in 16 Belgian cities. - 2021-01-04, Mode in Belgium (fr, about Coddy): [Une expérience unique avec l'Escape Game Urbain de Coddy !](https://modeinbelgium.be/une-experience-unique-avec-lescape-game-urbain-de-coddy/) — Review of Coddy's urban escape games. - 2020-02-22, BX1 (fr, about Coddy): [Échappez à une attaque de zombies grâce à cet escape game extérieur dans les rues de Bruxelles](https://bx1.be/bruxelles-ville/echappez-a-une-attaque-de-zombies-grace-a-cet-escape-game-exterieur-dans-les-rues-de-bruxelles) — Brussels TV report on the launch of Coddy's first game, a zombie escape game in the streets of Brussels. - 2020-02-18, La Libre Belgique (fr, about Coddy): [Attaque de zombie sur la ville : Infected, un nouveau jeu en géolocalisation arrive en Belgique](https://www.lalibre.be/lifestyle/magazine/2020/02/18/attaque-de-zombie-sur-la-ville-infected-un-nouveau-jeu-en-geolocalisation-arrive-en-belgique-FAU3KBJADJEUTFRAO5VXTHFJMU/) — Announces Coddy's first public game sessions in Brussels and Mons. ## Frequently asked questions ### Who is Sébastien Balieu? Sébastien Balieu is an entrepreneur based in Brussels, Belgium, with 20 years of experience in digital marketing, product design and software development. He is the CEO and co-founder, with Didier Boulvin and Stéphane Draux, of Coddy, a Brussels company that turns cities into outdoor escape games played on a smartphone, for families, friends, companies (team building) and schools. Coddy launched its first game in Brussels in February 2020, raised €600,000 in January 2022 and now operates in 74 cities in 9 countries. He also runs One More Pixel, a Brussels digital studio he founded, which works under the Numinam brand and publishes its own products, including the family chores app Harmonia. Before becoming an entrepreneur, he was Digital Marketing Manager at Walibi Belgium (Compagnie des Alpes group), Zetes and AvantageGolf. He is a self-taught designer and developer. ### What is Coddy? Coddy is a Brussels company that creates urban escape games played outdoors on a smartphone: players walk through a city, solve puzzles and discover its landmarks. It was co-founded by Sébastien Balieu (CEO), Didier Boulvin and Stéphane Draux. The legal entity was created in June 2018 as Kalio Tech, a web and mobile agency that funded the development of the games, and was renamed Coddy in December 2021. The first game launched in Brussels in February 2020. Coddy raised €600,000 in January 2022 through the Spreds crowdfunding platform, Digital Attraxion, finance&invest.brussels and business angels. As of September 2026 it offers 275 games in 74 cities across 9 countries, has welcomed more than 250,000 players and has worked with more than 600 companies for team building. It also runs school outings. ### Who founded Coddy? Coddy was co-founded by Sébastien Balieu, Didier Boulvin and Stéphane Draux. The company was registered in Brussels in June 2018 as Kalio Tech and renamed Coddy in December 2021. Sébastien Balieu is its CEO. ### What is One More Pixel (Numinam)? One More Pixel SComm is the Brussels digital studio founded and managed by Sébastien Balieu. It designs and develops websites, web and mobile applications, AI automations and internal tools, and trades under the brand Numinam (numinam.com). It also publishes its own products, such as the family app Harmonia. ### What companies and products has Sébastien Balieu created? He co-founded Coddy (first as Kalio Tech, 2018) and founded the digital studio One More Pixel, which trades as Numinam. Through One More Pixel he created the products Harmonia, Vaibes and Crewsade, and he also founded the video game marketplace Attic Gaming. ### What did Sébastien Balieu do before founding his companies? He spent about ten years in digital marketing: Digital Marketing Manager at AvantageGolf (2006–2009), at Walibi Belgium, part of Compagnie des Alpes, where he led the brand's digital transformation in Belgium, France and the Netherlands (2009–2014), and at Zetes (2014–2017). ### Has Sébastien Balieu been featured in the press? Yes. He was interviewed in the podcast Meet the Transformers (2023) and is named as Coddy's co-founder or CEO by L'Avenir, Trends-Tendances and hub.brussels. Coddy has also been covered by RTBF, La Libre Belgique, BX1, ELLE Belgique, La DH and others. The full list with links is at https://www.sebastienbalieu.com/press. ### Where is Sébastien Balieu based? In Brussels, Belgium. He works in French and English. ### Is Sébastien Balieu the chemist from the University of Rouen? Sébastien Balieu, the Brussels-based entrepreneur and CEO of Coddy, is not the same person as Dr Sébastien Balieu, organic chemist and lecturer at the Université de Rouen-Normandie. ### How can I contact Sébastien Balieu? By email at sebastien@numinam.com or on LinkedIn at https://www.linkedin.com/in/sebastienbalieu. ## Profiles and contact - LinkedIn: https://www.linkedin.com/in/sebastienbalieu - Malt: https://fr.malt.be/profile/sebastienbalieu - X (Twitter): https://x.com/sebastienbalieu - Flickr: https://www.flickr.com/photos/nwk_ - Email: sebastien@numinam.com - Website: https://www.sebastienbalieu.com