HackerRank

Vivek Ravi Sankar started HackerRank in 2010 in India, driven by personal frustration from his time as a developer at Amazon. The hiring process was absurdly inefficient: his team conducted approximately 100 phone screens just to make a single offer. Resumes were terrible predictors of actual coding ability, and interviews were so despised by interviewers that they'd either schedule them at the very end of the day or first thing in the morning—anything to get them over with. The core insight was simple: there had to be a better way to evaluate developers that was both more efficient and actually merit-based.

Vivek and his co-founder Hari (from college, not Amazon) started with Interview Street, a mock interview product. The idea seemed logical: help candidates prepare by having them do mock interviews with people who'd been through the interview at top companies like Amazon. They charged candidates 250 rupees (~$10) and paid interviewers 250 rupees, keeping 100 rupees for themselves. The problem? After a year and a half of grinding, they'd made about $1,000. The payment infrastructure in India was broken—they had to collect money in cash from candidates in person. The marketplace never worked: interviewers at Google, Amazon, and Microsoft had no real incentive to spend an hour for a few dollars.

They pivoted to helping students apply to US master's programs, connecting them with current students at top schools like Carnegie Mellon and MIT who could review their applications. This gained traction briefly, but completely collapsed after a few months. Why? Students only apply to grad school twice a year. They applied to Y Combinator twice and got rejected both times.

The breakthrough came when Vivek and Hari flipped their thinking 180 degrees: instead of selling to candidates, what if they sold to companies? Both founders had backgrounds in competitive programming and had built a code evaluation system in college. They decided to test whether companies would buy a tool to assess developers through coding challenges rather than resumes.

Getting that first customer was brutal. Vivek's ex-manager at Amazon wasn't interested in a garage startup. So they deployed a guerrilla tactic: they created a fake resume with perfect credentials—IIT degree, highest GPA, work at top companies—and posted it on job boards. Within days, recruiters started calling, desperate to hire this phantom candidate. When Vivek answered, he'd explain the situation and pitch HackerRank instead. It worked. Zynga became an early customer through this hack. They also leveraged friends at companies and manually built custom coding challenges for early customers, handling all the busywork of problem design, test case generation, and boilerplate code themselves—deeply unscalable but necessary to prove the concept.

Once they had proof points, inbound demand accelerated. Remarkably, HackerRank spent less than $10,000 lifetime acquiring developers to the platform—nearly everything was organic and word-of-mouth. Instead, all energy went into enterprise sales. Vivek became the first salesman, manually pitching and discovering pricing through trial and error. They hired sales reps, brought in a head of sales, and systematized the go-to-market process.

On the product side, they obsessed over time-to-value and user experience. As they sold to larger companies like Goldman Sachs and Stripe, they had to build enterprise features nobody initially thought about: Workday and Tileo integrations, single sign-on, team management. They maintained a developer-first philosophy throughout—improving the editor, supporting more languages, better challenges—which indirectly made the platform more attractive to recruiting companies.

By around 2014-2015, they were in hypergrowth mode. But Vivek started to worry. The pressure to double ARR every year, the Silicon Valley obsession with growth at any cost—he felt the foundation was shaky. In 2016, this caught up with them. He'd admired how Stripe's Patrick Collison spent two years getting the first ten people right, building a strong foundation before scaling. HackerRank had optimized for speed over stability and it hurt.

Today, HackerRank has close to 3 million developers on the platform and over 1,000 paying enterprise customers across industries: Stripe, Goldman Sachs, Best Buy, and more. They've raised VC funding post-Y Combinator and learned hard lessons about balancing hypergrowth with operational fundamentals. Vivek now emphasizes the importance of hiring the right team, maintaining clear product vision, and building durable foundations—lessons he wishes he'd internalized earlier. The company remains developer-focused in spirit, with a mission to make hiring more merit-based and the job interview process less terrible for everyone involved.