Good job. My 1st was a bit rough but functional.
Looks like your soldier is blobbing up instead of melting into the joint. Suggest cleaning the copper clad cross ties & rail with red scotch pad, apply a small dab of flux, hotter soldering iron, allow the heat to build up between the rail and cross tie before soldering. You will see a dramatic difference in the quality of soldering.
What soldering iron are you unsing? What is the temp of the iron tip? What solder are you using? Practice on a few scraps of rail and you will find a combination of cleaning, flux, heat and solder to give quality joints.
Fast Tracks has plenty of videos on their web site.
Took two tries. Clean up and ready for layout
Tom