About us

Our mission is to reinvent the way people learn, starting with language.

Learning a language can change a life by opening doors to new cultures, careers, and communities. Two billion people around the world are actively trying to learn a language, but the best way to learn (one-on-one tutoring) is hard to access at scale and hasn’t been meaningfully improved in decades. Speak is building a human-level, AI-powered tutor in your pocket: a conversation-first experience that lets learners actually speak, get instant feedback, and progress through carefully designed lessons. The result is a complete path from beginner to confident speaker across multiple languages.

Speak first launched in South Korea in 2019, where Speak has now become the number one language learning app, and we now serve learners across many markets and 15+ languages. Speak is one of the world’s leading AI companies, with over $150m raised in venture investment from OpenAI, Accel, Founders Fund, Khosla Ventures, and more, with a distributed team across San Francisco, Seoul, Tokyo, Taipei, and Ljubljana.

About This Role

Are you detail-oriented and passionate about operational excellence in a fast-moving start-up environment? As our Billing Specialist (Contractor), you will own the end-to-end B2B billing lifecycle for our Korea operations—from electronic tax invoice issuance to collections. This role is critical to ensuring accurate, compliant, and scalable billing operations as we grow our B2B business in Korea. You'll partner closely with Sales, Customer Success, Finance, and Revenue Operations teams to deliver seamless billing experiences for our customers while building the processes and playbooks that will support our future growth.

This is a 6 month contract position, with an opportunity to extend or convert according to business needs & performance. You’ll report into Korea’s Finance Manager.

What you'll be doing

• Own AR (accounts receivable) processes, including billing communications and customer follow-ups, gathering required information and managing issuance schedules based on contract terms and customer requirements.

• Issue and manage Korea electronic tax invoices in compliance with National Tax Service requirements, including processing amendments, corrections, and re-issuances when needed.

• Manage supplier portal workflows (such as Coupa) and public sector procurement channels (such as Nara Jangter) when required.

• Validate billing amounts against customer statements and internal records, identifying and resolving discrepancies before issuance.

• Maintain accurate contract billing terms, ensuring alignment between executed contracts and actual invoicing and collections.

• Track payment status and AR aging, initiating customer outreach for overdue invoices and partnering with Sales/CS teams on escalations.

• Partner with Finance and Revenue Operations to standardize processes, document exception-handling playbooks, and implement preventive controls to reduce errors and compliance risk.

What we're looking for

• Previous experience in B2B billing operations and accounts receivable in Korea.

• Working knowledge of Korea electronic tax invoice workflows and VAT basics.

• Ability to interpret billing-related contract terms and translate them into operational billing plans.

• Strong communication skills with both customers and internal stakeholders, with native proficiency in Korean (basic business proficiency in English is preferred).

• Proficiency with spreadsheets and operational systems such as ERP and CRM.

• Experience with Front or shared-inbox-based workflows is a plus.

• Experience with supplier portals, public sector procurement channels, and subscription or SaaS billing is a plus.

Why work at Speak

1. Join a fantastic, tight-knit team at the right time: we're growing very quickly, we've most recently raised our Series C from some of the top investors in the valley, and we've achieved product-market fit in our initial markets. You'd join at a magical time when a single person could significantly change the course of the company.

2. Do your life's work with people you’ll love working with: we care strongly about our craft and want every person at Speak to feel like they're growing every day. We believe in the idea that working with people you both enjoy and have respect for makes everything better. We hire thoughtfully and only work with people we admire deeply.

3. Global in nature: We're live in over 40 countries and launching in a number of new markets soon. We have dedicated offices in San Francisco, Ljubljana, Seoul, and Tokyo, and you’ll have the opportunity to talk to users in each of these regions on a regular basis as well as travel.

4. Impact people's lives in a major way: Learning a language is one of the single most life-changing skills one can learn, and right now 99% of people never achieve their goal because the process is broken. We’re helping millions of people achieve their goals and improve their lives.

Speak does not discriminate based upon race, religion, color, national origin, gender (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics.