As digital signatures become the norm in modern business, Yousign has established itself as a trusted leader across Europe. Behind its simple, intuitive interface is a powerful technical engine, handling millions of signatures each month for over 25,000 clients in Europe. Yousign is redefining how digital trust and compliance are built in today’s fast-moving world.
Symfony: A Strategic Foundation
Yousign’s mission is clear: make trust effortless. But scaling that promise across multiple markets brought real technical challenges:
- Ensuring secure, compliant operations across different countries
- Managing technical debt in a rapidly evolving environment
Yousign’s product suite blends intuitive web apps with developer-friendly APIs, requiring a backend that’s both rock-solid and adaptable. Symfony fits the bill perfectly. This decision was guided by a need for:
- Speed of development: to release features quickly
- Built-in security: essential in a legal-tech environment
- Scalability: both technically and organizationally
- Strong ecosystem and documentation: reduced onboarding time and eased migrations
- Stability and flexibility: enabled fast iterations without sacrificing long-term maintainability
- Modular architecture: allowed for shared components across autonomous teams
- High team satisfaction thanks to a consistent, modern codebase
Since Symfony 2, the framework helped Yousign turn complexity into clarity as a central pillar of Yousign’s technical strategy, supporting a wide range of use cases through a React frontend and a clean, hexagonal backend architecture. Thanks to Symfony’s vibrant ecosystem and community, even major migrations (like moving away from FOSRestBundle) have been smooth and manageable.
Engineering Culture: Quality, Autonomy, and Collaboration
Yousign’s commitment to quality is a cultural cornerstone. As the team grows, that shared commitment keeps everyone aligned. With 80 engineers working in autonomous squads, each team owns its scope while building on shared Symfony components. Teams regularly exchange best practices, contribute to internal documentation, and organize knowledge-sharing sessions.
The Developer Experience team plays a crucial role:
- Keeping Symfony and PHP up to date
- Monitoring tech trends via RSS and social media
- Automating dependency updates with Renovate
This forward-thinking culture makes Yousign a magnet for top engineering talent, where developers know they’ll work with modern, respected tools that are actively maintained and constantly improving.
Looking Forward: AI and Modular Services
In 2025, Yousign is exploring a shift towards modular services and AI. While the current monolith remains efficient and easy to maintain, modular services could better meet emerging needs. AI will enhance developer efficiency from smart debugging to code suggestions—helping teams focus on high-impact work without compromising on legal or privacy standards.
Built on Trust, Backed by Symfony
In a world where trust is everything, Symfony has quietly powered Yousign’s growth. From modular design to scalable systems, it enables the team to build fast, innovate confidently, and deliver trust at scale.
Yousign proves it: with the right architecture and the right culture, trust can grow with your business and Symfony can lead the way!
Thanks to Jean-Baptiste Delhommeau, Engineering Manager - Developer Experience, Yousign
The Yousign API offers a seamless way to integrate eSignature, eSeal, and document verification directly into your business applications. Integrate and test the API with a free 40-days Sandbox in a dedicated development environment before going live.