Having started his senior career in 1972 at Saint-Étienne he went on to spend most of playing days there before joining Paris Saint-Germain in 1983.

Janvion started his career in Martinique with the local side CS Case-Pilote.

[1] He played professionally for AS Saint-Étienne (1972–83), where he competed alongside Michel Platini, and for Paris Saint-Germain (1983–85) before retiring at AS Béziers.

Janvion was also the manager of Martinique's top-level side CS Case-Pilote in the 2007–08 season.

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