Shnaider moved with his family to Israel when he was 4, and then to Canada when he was 13. He graduated from York University in Toronto in 1991 with a bachelor's degree in economics.
In 1994, Shnaider co-founded Midland Group—originally a steel producer—with former business partner Eduard Shifrin. The company operated in Ukraine before government-owned steel factories were privatized. In 1999, Midland Resources began buying shares in the Zaporizhstalsteel mill. By 2001, Shnaider's consortium had bought 93 per cent of the mill for $70 million. According to the Panama Papers, in 2010, Shnaider sold at least half of Midland's ownership in Zaporizhstal to buyers financed by Russian state-owned Vnesheconombank, who were then themselves acquired by the development bank.
Shnaider partnered with Donald Trump in the construction of the Trump International Hotel and Tower, which is in Toronto. Trump was a minority shareholder in the project, and his firm owned the property management contract. In 2007, Shnaider was reported as having decided to keep the penthouse suite for himself, at an estimated value of $20 million. In 2017, the building and Shnaider were named as key links in a financial connection between Trump and the Russian government. Shnaider reportedly used proceeds from the sale of his Ukrainian steel mill to partially meet cost overruns at the Toronto Trump Tower. In March 2010, Shnaider invested in a property consortium that bought Toronto's King Edward Hotel for $50 million. The asset was purchased in a distressed sale from Lehman Brothers. Shnaider originally invested alongside three other real estate companies, Skyline International Development Inc., Dundee KE Inc., and Serruya Realty Group Inc. However, on 1 August 2012, Omni Hotels & Resorts CEO James D. Caldwell also took a stake in the hotel; and on 24 November 2015, Omni Hotels and Resorts announced that it had bought the other parties out and fully owned the hotel. In 2011, Shnaider formed a Delton Retail fund, a property group, with N3 Real Estate, owned by Dutch businessman A.D.G van Dam. On 30 December 2015, Shnaider invested NIS₪39 million in Mishorim Development Ltd., a real estate company controlled by developer Gil Blutrich. Shnaider had already invested alongside Blutrich in the King Edward Hotel, which Blutrich invested in via Skyline International Development Inc., a Mishorim subsidiary. On July 2016, he increased his holdings in this company from 21% to 37%.
Personal life
Shnaider is married to Simona Shnaider. They have three daughters. In August 2016, they sold their home in Bridle Path, Toronto, for $22 million. Schnaider is President of the Jewish Russian Community Centre of Ontario.