Hi,
A few websites that I used and found to be effective to look for development jobs are as follows:
www.indeed.com.pk www.brightspyre.com www.rozee.pk jobs.trovit.com.pk
I would often filter by city, and then scout for the type of jobs I wanted.
Word around the block always has been that in the development sector, a contact is always needed to get you an interview. I found that to NOT be true. A good, professional looking CV (mine is still a one-pager) accompanied by a cover letter have landed me over 10 job offers since I have come back (and a lot more interviews)!
Other, often unsung players, in this sphere are head hunters. The catch is that your first salary is often given to the head hunters as compensation if you accept the job offer- but it's honestly not a bad deal considering you will be gainfully employed. The most effective head hunters I know of include:
Resources Stop Shop Career Pakistan (almost exclusively recruits for British Council)
Good luck for your job search!