Summer Internship '25
Build Real Products. Solve Real Problems. Make Real Impact.
Hello!
Every engineering student knows the frustration: four years of theory, countless assignments, but when graduation arrives, you still feel unprepared for the real world. The gap between classroom learning and industry demands seems impossible to bridge. As Hexinox's innovation lab, we've built products like Ulsav, Practizo, & Verifycate that address various problem statements in the college & academic space, and are used by thousands of students today. This summer, we're calling for student interns to work directly on these platforms alongside our engineering team.
We welcome undergraduate students to join our close-knit, remote team for an intensive 12-week journey where you'll ship real features, solve genuine technical challenges, and experience startup life from the inside. Born from the vision of college students who refused to accept the status quo, Four43 Labs operates with the energy and innovation that comes from building products & solutions we ourselves needed during our university days.
No "learning projects." This is not a namesake internship programme where you will do random projects or get trained by a faculty. Here you will get to work with our core engineers on our portfolio of live customer-facing products like Practizo, & Ulsav.
If you're tired of theoretical learning and ready to build something that thousands of students use, applications for our Summer 2025 program are open till May 31st. Join us in proving that the best way to learn product engineering is by doing it—with real stakes, real users, and real impact.
🤔 Why this Programme?
There are several reasons, but here are our top 3 reasons for you to join us -
🚀 Learn by actually doing, grow real confidence
When you follow tutorials or build personal projects, they often don't need to address all corner cases, and you miss out on the challenges and feedback that only come when your app is scaled and used by real users. Working on actual products helps you learn from these challenges and feedback. It tests and builds your confidence in your skills.
🎯 Fix real problems, help real users
Work on and contribute to our post-MVP products, like Ulsav and Practizo, that already have thousands of users. Your code goes into production, not a practice repository. You get to make or break things for users, and see your code in action!
💫 Work in Teams & Learn With Peers
Unlike isolated hobby projects, you'll collaborate with experienced engineers and fellow interns in a real startup environment. Learn version control best practices, code reviews, agile methodologies, and the communication skills essential for modern software development. Plus, build relationships that extend beyond the internship.
🚀 What is Four43 Labs?
Four43 Labs is the product engineering and innovation lab under Hexinox that builds and operates our portfolio of products, including Practizo, Ulsav, Verifycate, Pixinoid, etc.
We started as college students building solutions to problems we faced ourselves, and those solutions grew into products serving thousands of users.
Today, we're a small, young, closely-knit, remote team that moves fast, dreams big, and challenges norms.
For this internship programme, you will be working on one or more of the following real products under Four43 Labs, solving exciting challenges, making impactful contributions, and making a difference to our users.
Ulsav
Ulsav curates and empowers students, universities and other communities to host all kinds of events and help them scale and reach you. We provide an end-to-end tech platform that makes the life of organisers easy and the participant experience seamless.
We just hosted Vidyut 2025, National Level Multifest by Amrita Vishwa Vidyapeetham, that saw over 5000 participants across 50+ events, ticketing over 50lks INR in revenue!
Ulsav has been hosting Vidyut since 2020 and has also other techfests like Dastaan, and international conferences like Biocrest for Amrita.
Practizo
Practizo is an end-to-end career super-app and community platform for college students to
You can think of it as → LinkedIn++ Exclusively for College Students
Practizo is in Beta
We started building Practizo in January 2025 and rolled out a private beta in February. Currently, it is in public beta and under rapid development.
🔍 Who are we looking for?
We're looking for curious & motivated builders who want to learn, contribute, and grow in a supportive yet challenging environment.
🧠 Mindset & Attitude
🖥️ Technical Foundation
The following is our common tech stack across products, We would prefer candidates who have some experience/exposure to at least a few of them -
🎓 Academic Background
🎛️ Programme Specs
💼 Application Process
We've designed our application process to be straightforward while helping us identify the best fits for our team culture.
Step 1: Online Application
Duration: 10-15 minutes
Apply to the programme by filling up the form, clicking the link below -
Submit your basic information, resume, and answers to a few key questions about your motivation and background.
What we're looking for: Genuine interest, clear communication, alignment with our values
Step 2: Take Challenges
Duration: Up to 48 Hours (Take Home)
You will receive a set of challenges after you apply for our programme, that reflects the type of work you'd do with us. You should try to complete these challenges and submit them back to us within 48 hours. The more challenges you solve, the better.
More instructions and rules will be shared with you after you apply to the programme.
What we're looking for: Problem-solving approach, code quality, creativity in solutions
Step 3: Video Interview
Duration: 30 mins
Conversational interview with team leads covering your technical approach, motivation, and culture fit. We'll also discuss your challenge submission.
We will schedule the interview at your convenience, after we complete review of your challenge submission which may take up to 1 week. We will keep you updated.
What we're looking for: Communication skills, technical reasoning, enthusiasm, team compatibility
Step 3: Decision & Offer
Duration: Within 1 week of the interview
We'll notify all candidates of our decision. Successful candidates receive program details, project assignments, and onboarding information.
💬 FAQ
Thank you 🙏
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