We identify your brand identity, values, and qualities through the design of your brand platform. Working from this platform, we produce 360° creative visualizations, including display, motion design, social, and print.

We manage marketing performance end to end: acquisition, automation, CRM and customer journey optimization. In an ecosystem where search engines are giving way to answer engines, we embed GEO/GSO (Generative Engine Optimization) at the heart of our strategies, so your brands are cited, recommended and visible wherever your customers now search: in conversational AI. From data to activation, we connect artificial intelligence and customer intelligence to maximize every touchpoint.

We provide a user-centric approach, placing your users at the heart of an intuitive and emotive design. Adopt a user-centric design strategy to identify and meet user needs and significantly improve your KPIs.

We optimize the ergonomics and UX of your professional tools to optimize their usability. As the use of AI expands throughout your organization, it is important to design interfaces and experiences that are simple, practical, and enjoyable.

Data: A Key Component in Creating an HCI

The key to any HCI project is, of course, data. How is it gathered? What is its structure? Its governance? Sia Partners' data scientists cover the entire data value chain, regardless of the technological environment in which it resides. This is why any project to create an HCI naturally starts with the analysis of available data.

If analysing the data is the first step, the last step that will validate the success of an HCI creation project is not the existence of the HCI as such, but its adoption by employees. However, all too often, this last step is not taken or is taken in the wrong direction.

UX Designer: Facilitate your HCI Projects

From the beginning of your HCI project, a UX Designer specialized in HCI creation projects, works alongside the Data Science team. The UX designer facilitates the collaboration of all the components which are necessary to successfully complete the project: customer expertise, Data Science, technical development, UI Design.

Major transformation projects are increasingly complex and challenging. In order to carry them out successfully, Project by Design capitalizes on our designers’ skills, as well as our service and sector expertise, to propose an innovative approach, which is iterative and inclusive. 

In an uncertain world, it’s important to look to those who work in the community, who come up with new ideas, who prototype and reinvent. We enable your teams to discover new ways of working which are collaborative, creative, agile and efficient. 

It’s time to put “action” back into the way we work. To achieve this, we develop innovative, transformative tools that facilitate projects in a collaborative way. Whether they’re off-the-shelf or made to measure, our solutions boost creativity, agility and efficiency. 

Finding the best rhythm is the key to success. Efficiency doesn’t mean working quickly, it means doing your best with limited resources. Our workshops are designed to help participants find a rhythm with which they can take action and make progress in their projects, all while fostering creativity. 

We design and build robust digital platforms, backed by deep expertise in our partner CMS Drupal (multi-site architectures, headless setups, migrations) and in Next.js (SSR, SSG, React/TypeScript design systems). Our international team of 25 engineers, based across France, the United States, Canada and Dubai, with offshore support and production in Mumbai, operates on a follow-the-sun model and masters both AI tooling and development best practices to guarantee quality, responsiveness and service continuity.

Our work in practice

Our technical team works across a wide range of digital projects. Corporate and institutional websites — high-traffic multi-language, multi-site platforms, editorial portals, online ticketing & e-commerce, brand websites. MCP and decoupled architectures — design of REST and GraphQL APIs connecting CMS, CRM, PIM and business tools within composable digital ecosystems. Custom CMS and back-offices — deployment and customization of content management platforms tailored to complex editorial workflows. Mobile applications — iOS and Android app development in React Native, integrated with existing information systems. ChatGPT app-in-app and micro-frontends — design of embedded application modules within super-apps or partner environments, functioning as standalone experiences inside a third-party ecosystem.

Hosting & Cloud

We deploy and operate your platforms across all environments, on-premise, cloud or specialized: AWS, Azure, GCP, Acquia, Platform.sh, Vercel, or in-house infrastructure. Our DevOps practices (Infrastructure as Code, CI/CD, containerization, monitoring) ensure reliable, secure and scalable deployments, whatever the level of requirements and the target infrastructure.

Quality & Digital Responsibility

Every line of code is built to last. From the design stage, we build in web performance requirements (Core Web Vitals, Lighthouse optimization), security (hardening, vulnerability scanning, WAF), GDPR compliance (privacy by design, consent management) and accessibility (WCAG 2.1 AA, RGAA). Committed to an eco-design approach, we reduce the environmental footprint of our deliverables: page-weight optimization, functional sobriety, low-carbon hosting, and measurement.