How to Switch from a Service Company to a Product Company in India

If you're working at a service company in India — TCS, Infosys, Wipro, HCL, Capgemini — and want to move to a product company like Amazon, Google, Flipkart, Swiggy, CRED, or Razorpay, you're not alone. This is the most common career ambition in Indian tech. And it's completely achievable, but it requires a very different kind of preparation than most people expect.

What Product Companies Actually Look For

Product companies (especially FAANG and Indian unicorns) evaluate engineers on three dimensions: Data Structures & Algorithms (DSA) ability, system design thinking, and the ability to own problems end-to-end. Your service company work almost certainly has examples of all three — they just aren't framed that way on your resume.

Step 1: Fix Your Resume First

Most service company resumes list project names, client names, and technologies used — but say nothing about impact. Product companies want to see what you built, how it performed, and what changed because of your work.

Look at every bullet on your resume and ask: what was the scale? What was the before-and-after? What would have broken if I hadn't done this? The answers are your bullets.

Step 2: Build Your DSA Foundation

This is where most service company engineers feel behind — and where most of the preparation time should go. Product company interviews heavily test DSA, especially for roles at Amazon, Google, Microsoft, and top Indian startups like Razorpay, CRED, and PhonePe.

• Start with Striver's DSA Sheet (free, structured, 191 problems in order) — the most popular starting point in India
• Solve 100-150 Leetcode problems focusing on Arrays, Strings, Trees, Graphs, DP, and Sliding Window
• Don't just solve — understand the pattern. For every problem, ask 'what type of problem is this?'
• Aim for 2-3 problems/day consistently over 3-4 months rather than intense sprints
• Practice explaining your approach out loud — interviews test communication as much as solution

Step 3: Learn System Design Basics

For roles with 3+ years of experience, system design rounds are standard. This is actually where service company engineers have an edge — you've likely worked with databases, queues, APIs, and distributed systems. You just need to learn the vocabulary and the interview framework.

• Study: Grokking the System Design Interview (Educative) or the free Gaurav Sen YouTube channel
• Learn to design: URL shortener, rate limiter, notification system, food delivery system, payment gateway
• Understand: CAP theorem, SQL vs NoSQL trade-offs, caching strategies, load balancing, message queues (Kafka/RabbitMQ)
• Practice the format: requirements clarification → high-level design → deep dive → trade-offs

Step 4: Target the Right Companies at the Right Stage

Don't apply to Google on Day 1 of your prep. Build your confidence by applying to Series B-D Indian startups first — their bar is high but their process often includes more practical coding rounds over pure DSA. Companies like Juspay, slice, Groww, Jupiter, and Zepto are great targets for mid-level engineers making the switch.

How to Handle the 'Only Service Company Experience' Question

Interviewers at product companies will often ask directly: 'You've only worked in services — have you built anything from scratch?' Prepare a strong answer in advance. Side projects help enormously here. Build something real: a personal finance tracker, a food ordering mini-app, a GitHub project with a proper README. It demonstrates initiative and ownership — the exact qualities product companies look for.

Realistic Timeline and Expectations

The switch is one of the best career decisions you can make — product company salaries are typically 1.5-3x service company packages at the same experience level, the work is more ownership-driven, and your career trajectory changes significantly. The preparation is hard but the ROI is real.