Alanen made her league debut against PuiU on 12 September 2009.[2] She scored her first league goal against NiceFutis on 11 October 2009, scoring in the 79th minute.[3]
HJK
Alanen made her league debut against Åland United on 10 April 2011.[4] She scored her first league goal against Turun Palloseura on 16 April 2011, scoring in the 61st minute.[5] On 3 September 2011, Alanen assisted Sini Vehviläinen in a 4-0 victory over Kokkola F10.[6]
Kokolla F10
Alanen made her league debut against HJK on 14 April 2012.[7] She scored her first league goal against FC Honka on 6 October 2012, scoring in the 1st minute.[8]
Umeå IK
In 2013, Alanen joined Umeå IK.[9] She made her league debut against Mallbackens IF on 31 July 2013.[10] Alanen scored her first league goal against Göteborg FC on 6 October 2013, scoring in the 88th minute.[11]
Vittsjö GIK
On 27 November 2015, Alanen was announced at Vittsjö GIK.[12] She made her league debut against Kvarnsvedens IK on 17 April 2016.[13] Alanen scored her first league goal against Göteborg FC on 10 July 2016, scoring in the 6th minute.[14]
On 29 November 2021, Alanen was announced at Kristianstads DFF.[18] She made her league debut against IFK Kalmar on 27 March 2022.[19] Alanen scored her first league goal against Hammarby Fotboll on 16 May 2022, scoring in the 32nd minute.[20]
In addition to football, Lappajärvi-born Alanen was also an international standard wrestler.[27] After a period of injury she decided to focus on football.[28]
^Wallenius, Daniel (15 June 2010). "Lappajärveltä liigatähdeksi" (in Finnish). Järviseudun Sanomat. Archived from the original on 6 November 2011. Retrieved 21 July 2013.