Your name
Web and App Development track. Work reviewed by a mentor.
Your dates
ID 3SI-26-0000Check at 3sintern.com/verify
Tech track
Web and App Development
Build screens and features for websites and apps that real customers use.
Placement depends on what each team has open, so pick this track as your first or second choice in the form.
Apply for this trackWhat you will work on
Three tasks from the kind of work interns do in this track. Yours depend on the team you join.
Build a page from a design
Turn a design into a working page that looks right on a phone first, then on a laptop.
Connect a form to an API
Send data to the backend, show clear errors, and handle a slow network without losing what the user typed.
Fix bugs from the team list
Pick up real issues, find the cause, fix it, and explain the fix in your pull request.
What your mentor checks
Your mentor is someone from the team. They review what you submit every week and ask questions like these. [REVIEW: how often]
- Does it work on a small phone and a slow network?
- Can the next person read your code easily?
- Did you test the edge cases, not just the happy path?
- Does your pull request say what changed and why?
Skills you will use
You do not need all of these on day one. The training for this track covers the basics, free if you are selected, and you learn the rest on the job.
- HTML, CSS and JavaScript
- React or a similar framework
- REST APIs
- Git and pull requests
- Testing on real phones
- Accessibility basics
A certificate anyone can check
When you finish, your certificate names this track and your dates. Recruiters can check it online with its ID.
Good to know
Mock interview
Practise with a mentor before your real interviews: 30 to 40 minutes online, then honest feedback. ₹299 on its own, and one is included with every internship. Expect questions like these.
- What happens between typing a URL and seeing the page?
- What is the difference between let, const and var in JavaScript?
- How do you make a page work well on a small phone screen?
- Explain what an API is to someone who has never built one.
When your internship is over, placement agencies we work with can help with your job search: openings in your field, your resume and applying. It is paid separately.
Questions about this track
Which languages do I need?
HTML, CSS and JavaScript are enough to start. You learn the team's framework on the job.
Will my code go live?
When it passes review, yes. That is the point: what you make gets used.
Which degree fits?
Any degree, if you can show something you have built. B.Tech, BCA and B.Sc students apply most often. [REVIEW]
Is there any fee?
Applying is free. If you are selected, the internship fee is ₹2,999, paid in two parts: ₹750 when you join, and the other ₹2,249 at least 30 days before your internship ends. Your acceptance letter shows both before you pay anything. The fee includes one mock interview with a mentor. Fees are not refunded, so read your acceptance letter before you pay. There is no fee for the certificate, and the training for your track is free for interns. If anyone asks you for money before you are selected, or for a certificate, it is not us: do not pay, and tell us.
What if this track has no open seats?
We talk about your second choice. If neither fits, you can take a training and apply again for the next batch.
Other tracks
Compare this track with the others, or take the 1 minute quiz.
Apply for the Web and App Development track
About 3 minutes. Free to apply. Pick a second choice too, so we can place you faster.
Apply for this track