Here are some ways I know of to find off-campus opportunities:

To stay updated about openings,bookmark this:

• Interndoor

Referral:

• Before applying for a job opening, try getting a referral from an employee of the company by sending them your resume along with the job ID/link.
• After receiving the referral, you'll get a unique referral link for that job in your email. Apply using that link.

Cold Email:

You can reach out to HR/EM/CEO/CTO.

Try the following email formats:

• <firstName>.<lastName>@<company\_email>
• <firstName><lastName>@<company\_email>
• <firstName>_<lastName>@<company\_email>
• <firstName>@<company\_email>

<company\_email> is generally the company's website domain, e.g. Uber – uber.com

Hackathons and Coding Contests

Take part in hiring challenges such as hackathons and coding contests. They have a high probability of getting a response.

Some websites that conduct these challenges:

• Unstop: https://unstop.com
• Hackerearth: https://hackerearth.com/jobs/
• Hackerrank: http://hackerrank.com/jobs/search

Websites to apply to startups:

• https://ycombinator.com
• https://wellfound.com
• https://naukri.com
• https://foundit.in
• https://cuvette.tech
• https://indeed.com
• https://freshersworld.com
• https://instahyre.com

You can also cold email/DM the CEO or HR of startups. Their contact details can often be found on the websites mentioned above.