David Machado est né à Lisbonne en 1978. Il est diplômé en économie de l’ISEG, l'École d'économie et de gestion de Lisbonne, et s'est très vite consacré à la littérature (fiction et jeunesse).
En 2005, il a reçu le Prix Branquinho da Fonseca pour son livre pour enfants A Noite dos Animales Inventados et, en 2010, son titre O Tubarão na Banheira a reçu le prix SPA/RTP des auteurs dans la catégorie du meilleur livre pour enfants et adolescents.
Il est l'auteur de la collection de nouvelles Histórias Possíveis et des romans O Fabuloso Teatro do Gigante, Deixem Falar as Pedras et Índice Médio de Felicidade. Il a également écrit les livres pour enfants Os Quatro Comandantes da Cama Voadora, Um Homem Verde num Buraco Muito Fundo, A Mala Assombrada, Parece Um Pássaro et Acho Que Posso Ajudar. Il a contribué aux recueils littéraires A Misteriosa Mulher da Ópera, Contos de Verão et O Segredo et a publié des nouvelles dans des revues et journaux portugais et étrangers.
Can you believe it? The guy was still trying to figure out the site. You weren't even here about half a year ago and Xavier was still worried about that shitty site. Because you put that into his head. You didn't shut up about the site for months. It was a foolproof idea. We were going to sell the business a year later with a 10,000% profit. We'd pay off the instalment loans, our children's education, lead a comfortable lifestyle, the whole film; and we were going to do something good, we were going to help people. I heard you talk about that so many times. I even started to believe it too. It seemed to be a great idea. To be honest, it still seems to me to be a great idea. But the truth is that we put money into it, money that I now need, money that might have stopped you from doing what you did, and we never saw that money again. And Xavier had all that work programming the site, weeks without sleeping, and when it was finally ready nothing happened. Months passed and still nothing happened. He was right: the site wasn't working. It's just that, well, for me it stopped being important a long time ago. But almost a year later Xavier was still trying to figure it out.
I didn't want to have that useless conversation, but I tried to be patient.
“What do you want to do?” I asked him. “We can't put more money in.”
He closed his laptop monitor a little and his face filled with shadows. He said:
“There are people using the site. The problem is that none of those people need help.”
In short, the problem was this: we created a social network where people who need help and people who are willing to help can meet. During the first 11 months that the site was live, 26 people signed up. Of those 26, there are 14 that never wrote anything, four that write regularly explaining that they need help jerking off, wiping their ass, cutting their toe nails, etc., three that use the site to stay in contact with each other without having ever made any request for help, and one that occasionally announces their availability to help whoever with whatever may be needed, in any place and at any time, and for that reason has a nine seater van.