DevFest Lyon 2025: what this first edition reveals about technological evolution

A Global Trend: Consolidation

This DevFest did not seek to impress with futuristic concepts. Instead, it highlighted existing technologies and, above all, solid and realistic practices:

• Automation
• Performance
• Robustness
• Accessibility
• Industrialisation

We are witnessing a shift from experimentation to consolidation, a clear sign of growing maturity in the tech industry.

From Experimentation to Industrialisation: AI Becomes a Standard

Nearly half of the talks were dedicated to artificial intelligence. What stood out most, however, was the change in mindset:

• Concrete use cases: conversational agents, script automation, MCP servers
• Security and governance: protection against prompt injection, data anonymisation

The talk by Marie Terrier, WRTW Production Director at Hermès, particularly illustrated this maturity. She detailed the development of an AI system designed to meet strong business constraints: a telephone-based conversational agent capable of understanding and processing complex requests from pharmacists in real time, despite the wide variety of formulations and the length of product names.

AI is now firmly established as a standard tool for developers, on a par with frameworks or cloud services.

Frontend: Towards Near-Native Performance

Web APIs are reaching a new milestone, notably with the emergence of WebGPU, which enables 3D rendering and heavy computations directly in the browser, as well as the View Transition API, which allows smooth cross-document page transitions with ease.

This API is compatible with all browsers. Although it is currently used mainly in Single Page Application contexts, it can also be implemented in Multi Page Applications — a major step forward, particularly for Server-Side Rendering.

However, innovation is not limited to graphical performance. Accessibility was addressed as a core design issue rather than merely a regulatory requirement.

The joint talk by Vanessa Strub (Digital Accessibility Consultant and Trainer) and Gabriel Pillet (Frontend Developer), both living with disabilities, brought the human perspective back into focus. Behind RGAA compliance percentages are real people, for whom accessibility is a daily concern.

Their presentation served as a reminder that accessibility is a collective responsibility from the very start of application design. It involves all stakeholders — UX designers, Product Owners, developers, QA teams — and must be integrated and challenged across the entire team.

In 2025, accessibility standards are no longer solely about compensating for disabilities; they aim to guarantee a quality user experience that benefits everyone.

Finally, it remains difficult to verify compliance with these requirements independently. While certain rules and tools can help with testing, audits remain the most reliable solution.

Cloud and Backend: Operational Maturity

DevOps practices are becoming more refined and increasingly focused on operational robustness:

• Standardisation (Docker images, Kubernetes operators)
• Advanced testing: load, performance and chaos engineering to anticipate failures
• Backend team awareness: resilience becomes a shared objective

The focus is shifting from implementation to robust operations: how to ensure stability and measure real behaviour under stress. This growing professionalism marks a new stage in the technological evolution of infrastructure.

Conclusion: A Technological Evolution to Embed in Business Strategies

This first edition of DevFest Lyon highlights a strong momentum: AI is becoming a standard, the web is moving closer to native performance, and infrastructure is reaching a new level of professionalism.

Clear signals for organisations: it is time to integrate these technological evolutions into digital strategies — not as optional features, but as key drivers of competitiveness.

Lucie Charrier – Software Design and Development Engineer
Emile Chomton – Technical Expert
Bertrand Guilbaud – Front & Mobile Business Unit Manager
Valentin Dubuisson – Technical Expert
Benoit Iacono – Business Unit Manager