The Citadel Alum Reshaping The World Of Trading

Vlad is the founder and CEO of Lighter, one of the top protocols in crypto. He began programming at age eight, competed in physics and informatics Olympiads from age 12, and graduated high school at 16 to enroll at Harvard, completing the degree in two and a half years. He chose economics over physics because he judged his programming skills already had diminishing returns and saw active development in option pricing and portfolio theory that physics lacked in the early 2000s. On his first microeconomics midterm he scored 94 against a class average of 37, which the professor described as historically one of the highest standardized scores, and that result led directly to his first research job. Ken Griffin personally recruited him to Citadel at age 18 after he was already in discussions at the quant research and portfolio management levels.

In 2004 Vlad flagged Bernie Madoff to Ken Griffin, noting that Madoff's Sharpe ratio was implausibly high and that his claimed options trading strategy did not add up. Griffin told him Madoff was running a Ponzi and not to worry about it, five years before Madoff was publicly uncovered. The SEC later published a report noting three anonymous hedge fund managers had reported Madoff, but Madoff gave the SEC a fake DTCC number that was never verified, and he never executed any actual trades, reporting only fabricated returns to limited partners. Vlad argues blockchain technology would have prevented the fraud because all trades would be verifiable on-chain, and that zero knowledge proofs can prove trades occurred without revealing their specifics publicly.

After leaving finance Vlad worked at Quora as head of machine learning and started an AI company, believing quant trading was not building new products or new markets. His early network included Adam D'Angelo, first CTO of Facebook and a board member of OpenAI, and two people from his physics camp who are now co-founders of Anthropic. He later joined Palantir co-founder Joe Lonsdale to head engineering at Addepar, where he recruited Scott Wu from the Olympiad world. Vlad and Wu co-founded a company together a few years after working at Addepar.

Rather than dictating a pivot away from their prior product Lunch Club, the team ran an internal YC-style process with three simultaneous projects and an internal demo day. Eighty percent of the engineering workforce was retained through the pivot to Lighter, partly because the technical problems involved, including cryptography, scaling systems, and quantitative finance, were closer to what engineers actually wanted to work on.

Lighter aims to build an exchange optimized simultaneously across four dimensions: low cost, low latency, verifiability, and security. A key technical breakthrough was building custom ZK circuits designed specifically for financial operations rather than adapting general purpose circuits. Those custom circuits require only one percent of the compute needed for a general purpose computer to run equivalent financial operations. Given that finance represents roughly 30 to 40 percent of the economy, Vlad argues this efficiency gain is highly significant if financial activity moves on-chain. Lighter uses ZK proofs primarily for scaling rather than privacy, and privacy features have not been a significant customer request.

Partners including Telegram Wallet and Robinhood conducted technical due diligence and cared significantly about the underlying technology. Robinhood Chain is built on top of Ethereum, making interoperability with Lighter an important factor in the partnership, and Lighter forward deployed engineers to work directly with teams at both Robinhood and Telegram Wallet. Vlad describes Ethereum as the on-chain equivalent of a clearing house in traditional finance, noting it has been secure and stable for ten years, and says moving off Ethereum is not in the top ten or top hundred items on Lighter's technical roadmap.

Lighter's primary technical focus for the third quarter of 2026 is building real options on-chain on the same balance sheet and risk collateral model as spot, with the stated goal of making those options tradeable through Robinhood. Lighter is structured as a US C-corp with no dual foundation structure and was built in the US from day one. The company committed that the venture round raised before its token launch is the last equity round it will ever raise, with all value accruing to the token rather than to equity holders. That pre-token equity round was five times oversubscribed, and only one percent of the cap table took the opportunity to exit at the time of the commitment. Vlad predicts that if the CLARITY Act passes and the SEC continues to evolve, equities could be tokenized and equity and utility tokens could eventually merge into a single instrument, though he acknowledges that outcome depends on regulatory clarity that does not yet exist.