As lawyer Malka in 2007 successfully defended Charlie Hebdo editor Philippe Val against charges of racism following the magazine's publication of Mohammad caricatures.

[7] In 2010 Malka defended his prior boss Kiejman in a defamation suit brought by Olivier Metzner and Françoise Bettencourt Meyers.

[11] In 2011, Malka was hired by Dominique Strauss-Kahn and Anne Sinclair to take various legal actions against various media regarding the Carlton affair and related issues.

In 2014 Malka defended Carla Bruni in her trial against Patrick Buisson, former counselor of President Nicolas Sarkozy, regarding illegal recordings.

[16][17] In 2017 he featured in the Paris criminal court alongside fellow lawyer Eric Dupond-Moretti in order to defend Amina Friloux, accused of poisoning her husband.

In 2007, Malka and Kiejman defended Charlie Hebdo's editor Philippe Val in a suit for incitement to racism[19] by Union of Islamic Organisations of France and the Grand Mosque of Paris following the magazine's publication of Muhammad caricatures.

[23] He also worked as a lawyer for radio groups such as NRJ and Beur FM, for publishers Association and Cherche midi, for newspaper Metro and Entrevue and for several journalists as well as large French news agency such as Tony Comiti Productions and Tac-Presse.

He featured in the movie C’est dur d’être aimé par des cons (Official choice Cannes 2008), relating the trials of Charlie Hebdo regarding their caricatures.

[28] Having gravitated close to the comics world for years (through his work with Charlie Hebdo and Association), he started writing cartoon scenarios in 2004.

In 2006 he co-authored the book entitled La Face kärchée de Sarkozy with journalist Philippe Cohen and cartoonist Riss.

[32] In 2014, he published La vie de palais : il était une fois les avocats..., illustrated by Catherine Meurisse which tells the story of a young female advocate named Jessica Chaillette, "exploited by her boss, underpaid, waiting for her clients’ gratitude".

[33] Ondine Millot wrote in a review in Libération that the cartoon was pretty, malignant and funny while at the same time giving information on how the law system works.

The heart of the novel is the "criminal lawsuit of 25 days" of a political refugee named Oscar Rimah, charged for premeditated murder of the Secretary of the Ambassador of his origin country, where an Aztride dictator has seized power.

[36] Tyrannie also depicts a totalitarian dystopia that had manage to impose itself in our contemporary world, seducing people through an ideology at the crossroads of politics, philosophy and religion.