Career
Born in Bardejov, Šmelko began playing football for FK Inter Bratislava. He would make 38 appearances in the Czechoslovak first division with Inter Bratislava, and a further 22 appearances in the Czechoslovakian first division with Football Club Svit Zlín. He enjoyed a successful spell with Slovak side Ozeta Dukla Trenčín, and joined Russian side Football Club Gazovik-Gazprom Izhevsk for the 2003 Russian First Division season.
Šmelko made several appearances for the Slovakia national football team
After he retired from playing professional football, Šmelko became a football coach for AS Trenčín"s youth team at age 41.