Web Performance Engineering
A full performance diagnosis and a prioritized action plan — in 5 to 8 business days, without touching a line of your code.
Your app is slow and your users feel it — in bounce, in abandoned carts, in support tickets. I measure what is actually happening on real page loads and hand you a fix list ranked by gain per day of work.
What I measure
- Core Web Vitals — LCP, INP, CLS — on real page loads, not a lab-only score.
- Bundle size and composition: what ships, what is dead weight, what can be code-split or deferred.
- Render-blocking resources, main-thread contention points, hydration cost.
- TTFB and the network waterfall from first byte to interactive.
What you get
- A prioritized fix list: quick wins (under a day of dev) vs deep work, with the estimated gain per action.
- Read-only by default: no code changes, no deploy, no service interruption — even the most critical environments can buy it safely.
- The differentiator: optionally, I implement the fixes myself in your React / Next.js codebase.
Track record
18 months at Storengy (ENGIE Group): rebuilt critical features of an enterprise application used daily by hundreds of users, cutting page-load and form-submission latency.
From €2,900
5–8 business days depending on scope. Starts within two weeks.
50% to book the slot, 50% on delivery of the report.
I had the pleasure of working with Mickael at Storengy (Engie Group), where he quickly proved to be an outstanding addition to our development team.
From day one, Mickael integrated seamlessly into the team. His adaptability and collaborative mindset made it feel like he had been with us for years. Beyond his excellent interpersonal skills, his technical abilities are truly impressive — he is a versatile full-stack developer with a particularly strong expertise on the frontend side, and a remarkably broad command of modern web technologies.
What sets Mickael apart is the rare combination of autonomy, initiative, and speed without ever compromising on quality. He delivers fast, and he delivers well. I entrusted him with significant responsibilities on a key project, and he rose to the occasion — the application he worked on is now used daily by hundreds of users across the organization.
He also stands out for his ability to truly understand client expectations and translate them into creative, pragmatic solutions that hit the mark. On top of that, he is always eager to learn and genuinely committed to sharing knowledge with his teammates, making everyone around him better in the process.
I wholeheartedly recommend Mickael. He is an undeniable asset for any team tackling serious projects that demand both top-tier technical skills and strong human qualities. Any organization would be lucky to have him.