Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

One Stop Systems Inc.

Escondido, CA

We consent to the incorporation by reference in Registration Statement No. 333-227671 on Form S-8 of One Stop Systems, Inc. of our report dated 13 December 2018 with respect to the financial statements of Bressner Technology GmbH included in this current report on Form 8-K.

BDO AG Wirtschaftsprüfungsgesellschaft

 

/s/ Uwe Braunschläger

 

/s/ Frank Werner

Uwe Braunschläger

 

Frank Werner

Wirtschaftsprüfer, CPA

 

Wirtschaftsprüfer

(German Public Auditor)

 

(German Public Auditor)

 

Munich, Germany

13 December 2018