[2][3] In 1996, he was one of the founders and active members of youth organization "Priamoe deistvie" ("Direct action"), created in support of Alexander Lukashenko.

[2] In the fall of 2000, Yanchevsky was elected as a member of the House of Representatives of the National Assembly of the Republic of Belarus of the 2nd convocation (at the age 24).

He was the first is the Central Committee of the "Belarusian Patriotic Youth Union", who managed to get such a high position in the Administration of the President of the Republic of Belarus.

[1] However, Yanchevsky always had quite liberal views and rhetoric, he emphasised that his department "has the task of explaining public policy, not to spread propaganda".

His appointment was welcomed by the IT community for his liberal reputation, advanced knowledge of IT and his experience as a member of HTP Supervisory Board.

Under his direction, the Park showed a dramatic increase in performance, in 2017-21 attracting more than a 1000 of new companies and start-ups, while its exports grew 3.7 times.

[9] The Park became a sandbox for blockchain startups offering tax exemptions and relying on elements of English law in commercial matters.

[13][14][8][15] According to Nasha Niva, in 2023 he headed a legal entity in the United Arab Emirates, which was opened as a financial gateway for HTP residents.