| Cover | Jun. 30, 2021 |
| Affiliate, Collateralized Security [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jun. 30, 2021 |
| Entity File Number | 001-38685 |
| Entity Registrant Name | GRID DYNAMICS HOLDINGS, INC. |
| Entity Central Index Key | 0001743725 |
| Entity Tax Identification Number | 83-0632724 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 5000 Executive Parkway |
| Entity Address, Address Line Two | Suite 520 |
| Entity Address, City or Town | San Ramon |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94583 |
| City Area Code | (650) |
| Local Phone Number | 523-5000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
| Common Stock, par value $0.0001 per share | |
| Affiliate, Collateralized Security [Line Items] | |
| Title of 12(b) Security | Common Stock, par value $0.0001 per share |
| Trading Symbol | GDYN |
| Security Exchange Name | NASDAQ |
| Redeemable warrants, exercisable for shares of common stock at an exercise price of $11.50 per share | |
| Affiliate, Collateralized Security [Line Items] | |
| Title of 12(b) Security | Redeemable warrants, exercisable for shares of common stock at an exercise price of $11.50 per share |
| Trading Symbol | GDYNW |
| Security Exchange Name | NASDAQ |
