Finance Analyst, Accounting & Tax (Seoul, South Korea)

Position Overview

MangoBoost is seeking a Finance Analyst to own accounting, controllership, and tax for our U.S. as we scale our global operations. You will be the owner of the U.S. books—running the close, keeping us compliant, and partnering closely with the CFO Group in Seoul and our U.S. operations. This role rewards someone who is equally rigorous in the detail of reconciliation and in improving the process behind it.

Responsibilities & Opportunities

You will own the financial backbone of the U.S. entity, working closely with the CFO Group and HQ. This includes but is not limited to:

• Own day-to-day accounting and controllership for the U.S. entity—month-end close, journal entries, accruals, reconciliations, and general-ledger integrity under U.S. GAAP.
• Manage AP/AR, expense, and payroll-related accounting in coordination with HQ.
• Coordinate U.S. tax and compliance (federal / state filings, sales & use tax, 1099s, registrations) with external CPAs and tax advisors and own the compliance calendar.
• Support intercompany accounting between the U.S. (MBA) and Korea (MBK) entities—intercompany loans, reconciliations, and transfer-pricing inputs.
• Assist with audits, financial-statement preparation, and internal controls.
• Partner with FP&A and Treasury on actuals, cash, and reporting—and help improve and automate the close.

Who You Are

• 3–5 years in accounting/controllership and/or tax, ideally a mix of public accounting (Big 4 or regional) and industry.
• Solid U.S. GAAP knowledge with hands-on month-end close and reconciliation experience.
• Exposure to U.S. tax and compliance; comfortable coordinating with external advisors.
• Experience with an ERP / accounting system and strong Excel; you take full ownership of accuracy and deadlines.
• Detail-oriented and organized, able to operate in a fast-moving startup across time zones.
• Fluent in English and Korean—professional proficiency in both.
• Interest in AI infrastructure and semiconductor technologies.

About us

MangoBoost, Inc.

Agentic AI is fundamentally reshaping the paradigm of AI infrastructure. As environments emerge where countless AI agents operate simultaneously, conventional data center architectures are reaching their limits in both performance and efficiency. In response to this shift, MangoBoost is pioneering a new approach with its full-stack AI infrastructure solution designed to innovate every layer of the AI data center.

From LLMBoost, our AI inference optimization software, to GPU and storage systems powered by our proprietary DPU architecture, and orchestration software that seamlessly integrates and manages the entire stack, MangoBoost designs and develops every layer of AI infrastructure in-house. Rather than building isolated products, we focus on eliminating system-wide bottlenecks and fundamentally addressing inefficiencies across the entire infrastructure stack.

MangoBoost’s technology minimizes data movement and coordination overhead while maximizing overall system resource utilization, enabling exceptional performance and optimized total cost of ownership (TCO) for customers. Today, our solutions are already being deployed within real-world AI infrastructure environments through global partners, validating the strength of our technology. Through these efforts, MangoBoost is establishing a new global standard for AI data centers.

Notice Regarding Return of Hiring Documents

• This notice is in accordance with Article 11, Section 6 of the Fair Hiring Procedure Act, which allows job applicants, excluding the final successful candidate, to request the return of any recruitment documents they have submitted.
• Job applicants who were not selected as the final candidates in the recruitment process are entitled to request the return of the recruitment documents they submitted within 180 days of the date the employment decision is confirmed. However, this does not apply to documents submitted via the website or email, or documents voluntarily submitted by the applicant without the company’s request. If the recruitment documents are lost due to natural disasters or other reasons for which the company is not responsible, it will be considered as having been returned.
• Applicants wishing to request the return of their recruitment documents should fill out the Request for Return of Hiring Documents [Form 3 of the Enforcement Rules of the Fair Hiring Procedure Act] and submit it by email (recruiting@mangoboost.io). The documents will be sent by registered mail to the designated address within 14 days from the confirmation of submission. Please note that the cost of registered mail will be borne by the recipient.
• The company will keep the recruitment documents for 180 days following the confirmation of the employment decision. If no request for the return of documents is made within that period, the company will dispose of all recruitment documents without delay in accordance with the Personal Information Protection Act.