Romuald – Lead developer & web performance expert

I help teams design websites that are faster, more accessible and more sustainable — without compromising on quality.

My approach

For over 15 years, I have designed, developed, and optimized high-performance, accessible, and sustainable websites. My journey has led me to take charge of ambitious redesigns, structure tech teams, and transform complex constraints into concrete solutions. Today, in parallel with my main activity, I dedicate time to technical audits to help teams assess and improve their tools and applications, providing concrete solutions in areas such as performance, accessibility, security, and eco-design.

My approach is firmly pragmatic, simple, and impact-oriented. I work hand in hand with teams to create faster, fairer, and more efficient digital experiences, always keeping an eye on business objectives. I strive to make every solution simple, clear, and maintainable.

In parallel, I teach, share knowledge, and deconstruct. I intervene in RGAA compliance projects, facilitate discussions on the environmental impact of digital technology, and help teams align their technical choices with their values and long-term goals.

Read my full journey

Commitment to a more responsible digital world

I’m actively committed to a more responsible digital world. I regularly speak at conferences, contribute to reference documents, and support organizations that want to integrate more sustainable, ethical, and low-impact practices into their digital products and services.

Learn more about responsible digital practices

Expertise

  • Web performance (Core Web Vitals, TTFB, JS/CSS) and reducing environmental footprint
  • Digital accessibility (RGAA compliance, HTML/CSS/ARIA remediation)
  • Technical and semantic SEO, crawl management, logs, indexability
  • Application security (headers, auth, access control, surface audit)
  • Lean, scalable and maintainable architecture: Symfony, PHP, AWS Lambda, PostgreSQL, Redis, CDNs
  • Advanced cache optimization (ESI, cache-control, CDN, Cloudflare, AWS Cloudfront, Fastly)
  • HTML/CSS integration with and without JS, ultra-fast static sites
  • Cloud infrastructure and DevOps: AWS (EC2, S3, CloudFront), Terraform, GitLab CI/CD, GitHub Action
  • TypeScript development, JS performance audits, frontend tooling and testing
  • Training, mentoring, and support for tech or cross-functional teams

Explore my full expertise

My projects

Outside of my main work, I design and share content around responsible digital practices: training, conferences, tools…

  • “Responsible Developer” training — used by SNCF & Decathlon – Discover the training (in French)
  • Next talk: Volcamp (Thursday 2nd and Friday 3rd October 2025 in Clermont-Ferrand, FRANCE) – “How to combine performance and ecology?”See the event

See all my projects