Prompt Engineer

Remote OK - Anywhere in Japan
Full-time
January 16, 2025

Are you looking

To make meaningful changes at the fastest-growing tech company in Japan?
For a fair, highly flexible, inclusive working environment where anyone, regardless of their background, can make an impact?
To build the next bold idea in customer acquisition and revenue growth through conversational commerce technology
For a place where things are not just fast - but they happen now?

We Are Zeals - “Designing conversations. Driving conversions.”

Zeals is not another chatbot. Our automated chat solution and conversational technology change how consumers purchase or act online. Zeals converts customers who appear "unengaged" to become "valuable" through designed chat on Messaging Apps. Using AI-powered, human-designed conversation flows across chat platforms, Zeals enables brands to build personalized, automated conversations with their consumers and develop a deeper understanding of their preferences while creating a delightful, seamless shopping experience. Our last 3 years have been phenomenal. We have captured the heart of many businesses in Japan, with over 480 enterprises relying on our chat commerce offering to boost their mobile business.

The goal is simple: to “revolutionize hospitality on the Internet” by unlocking digital customer service experiences that were limited to physical stores previously.

Just Getting Started…

With more than 480 enterprise companies worldwide already utilizing our product, we are perfectly poised to seize market share and fuel exponential growth in the US market, with an eye on global expansion. Investors have taken note of our potential, leading us to recently secure nearly $40 million in funding, backed by Salesforce Ventures.

As our Prompt Engineer

Your typical day with us will involve leading the development of user-facing conversational AI features, designing and testing reusable prompts as part of a broader system, and ensuring our AI applications are optimized for efficient, natural, and personalized conversational experiences in English and Japanese. You will collaborate closely with cross-functional teams to deliver scalable and flexible experiences, all while mentoring members of non-technical staff on prompt engineering best practices and contributing to the overall technical direction of the prompt engineering team.

Your Typical Day With Us:

Design, develop, and implement a series of dynamic prompts for our conversational AI applications, ensuring high performance, scalability, and user engagement.
Contribute to and expand the design of a system of reusable, flexible prompts that prioritize scale and personalization across myriad tenants, industries, and modalities.
Conduct recurring tests of prompt performance prior to implementation to properly set business expectations for quality, security, and cost by model, model provider, tenant, and industry.
Participate in on-call monitoring of AI feature performance and remedy any issues that arise due to technical difficulties.
Educate non-technical members of the organization on prompt engineering foundational concepts, best practices, and tool usage.
Ensure the technical feasibility of feature requests from non-technical staff, collaborating closely with the business and product teams to deliver compelling and natural conversational user experiences.
Gather feedback on product performance, user experience, language experience, and quality from technical and non-technical staff alike, and cleanly organize data into quickly digestible reports for executive management.
Optimize prompt performance to ensure fast output times, API calls, and overall application responsiveness.
Collaborate with backend engineers to define API requirements, ensuring seamless integration between prompts, third party model providers, and backend systems.
Integrate closely with product leadership to shape the vision and roadmap for AI product functionality according to business needs and cutting-edge developments in generative AI.
Stay updated with the latest trends and technologies in prompt engineering, prompt defense, and generative AI development, continuously improving the team's skill set and technical direction.
Participate in cross-functional meetings to align prompt engineering with product goals, business targets, and company objectives.

What You’ll Need:

Native or business proficiency in English.
2+ years of professional, corporate experience in conversation design, prompt engineering, or a similar role, with a strong focus on building large-scale, high-performance, conversational applications.
Bachelor’s degree in Linguistics, Cognitive Science, Computer Science, Human Computer Interaction, Rhetoric, Communication, Performing Arts, Anthropology, or related field.
Deep understanding of prominent, contemporary large language models (LLMs) and their providers, with a clear perspective on the advantages and disadvantages of the contracts, capabilities, and cost of each.
Mastery in understanding the mechanics of language, with an awareness of analyzing one’s own bias around language style, dialect, and ideology.
Ability to communicate effectively with cross-functional teams, providing clear technical guidance and recommendations through negotiation, presentation, and conference.
Noted experience in crafting compelling presentation slides, clear business plans, and research documentation.
Previous experience leading or mentoring a team, with a passion for knowledge sharing and team development.

What Makes You Stand Out:

Hands-on experience with Python and related tools (VS Code, Postman).
Advanced degree in Linguistics, Cognitive Science, Computer Science, Human Computer Interaction, Rhetoric, Communication, Performing Arts, Anthropology, or related field (Master’s degree, PhD).
Demonstrated experience in conveying complex technical and sociolinguistic concepts to non-technical members of staff as related to business goals and objectives.
Extensive experience in systems design, especially for enterprise applications.
Native or business proficiency in Japanese language.
Basic knowledge of AI ethics pertaining to user protections in the United States or Japan.
Knowledge of backend technologies and how they integrate with prompt systems.

Don’t just take our word for it

Zeals has received the LinkedIn Top Startups award twice in a row. We believe this is a testament to our growth and our ability to attract great talents–who could potentially be your colleague!

Our Tech Stack

Backend Languages: Go, Python, Elixir
Frontend Languages: HTML, CSS, JavaScript (TypeScript, React.js, Recoil, Zod, Tanstack, etc)
Mobile Languages: None
Infrastructure: Google Cloud Platform, GCP Pub/Sub, Kubernetes, MongoDB, MySQL, Postgres, BigQuery, Elasticsearch, Qdrant
Configuration management tool: Terraform
CI/CD: Github Actions, ArgoCD, CircleCI
Monitoring: Grafana, GCP Cloud Monitoring, GCP Logging, GCP Cloud Trace, Opsgenie
Data: BigQuery, Parquet, Spark, Scala, Python, dbt
Knowledge Tools: Confluence
Other: GitHub / Slack / Jira
Process: Scrum

Ready to roll up our sleeves

We obsess over bringing hospitality to everyone–be it our customers or you! You’re an individual with unique needs. So, while we can’t attract you with ping-pong tables or all-you-can-drink espresso bars, we promise you a once-in-a-lifetime experience and co-workers that you can brag about to your friends, family, or anyone you meet the next time you go out for a party! . As an employer we are ready to roll-up our sleeves and change the status quo if it means to make your experience better!

Salary Range : competitive (performance review every 6 months)
Performance review: twice a year
Holidays: 10 days paid holidays during the first year, weekends off, national holidays, summer and winter holiday
Visa support: We sponsor visas for the right candidates. You can expect full visa support from our professional HR team.
Flexible working: Highly flexible, remote-first international organization
- For Japanese residence: Work from anywhere, interim work from overseas, full flex time
Housing allowance (within 1.5KM away from office)
Club activity allowance
Shuffle Lunch allowance (Cross department lunch)
Zeals Bar (bi-monthly free flow beer party)

APPLY NOW ➜

About Zeals

株式会社Zealsは、業界トップクラスの“チャットコマース”事業を主力に、“接客DX”事業にも注力し、「おもてなし」という日本文化の強みをデジタル化する挑戦を通じてクライアントの事業変革に貢献しています。

チャットコマース事業

チャットコマース『Zeals（ジールス）』とは、「ネットにおもてなし革命を！」をコンセプトにした、ユーザーがAIと会話しながら商品を購入したり予約したりできるサービスです。

ユーザーはLINEやFacebookなどのチャットアプリを通じ、従来は実店舗に限られていた接客体験を、Webやアプリケーション上で体験できます。チャットボットによる“ヒアリングファースト”な接客体験により、通常のLPと比較して約5倍の購買率向上を実現。旅行、化粧品、サロン、金融業界などに幅広く導入頂き、約400社のお客さまの売上増をお手伝いしています。

日本では「チャットボットはカスタマーサポートを自動化するのに使うもの」という認識が一般的ですが、海外ではチャットボットをコマース・マーケティングに活用する事例が多く生まれてます。

中国で人気のwechat上には800万体のチャットボットがマーケティングに活用されており、アメリカでもConversational Commerceと呼ばれるチャットボットを活用してマーケティングを行うサービスが増えています。チャットコマースはまさにこの"会話を通じて商品を買っていただく"ことに特化したチャットコマースを提供する業界初のサービスです。

接客DX事業

チャットボットをコアとして、ビデオツール等お客さまの課題に応じた手法を組み合わせ、実店舗での接客をデジタル空間で実現する一気通貫したサービスです。AIと人のハイブリッドにより最適化された接客体験をユーザーへ提供することで深いインサイトやニーズ、悩みに応えます。

今後は、チャットコマース事業と接客DX事業を主軸に様々な業界でのオンライン接客を広げ、海外展開や音声への拡張を目指します。また、現在の主軸事業の他にも、ビジョンに沿った新規プロダクトの開発やコアテクノロジーの開発を進め、日本が誇るおもてなし文化に新たな人と人とのつながりを創造します。

ここに注目！

Zealsは、テクノロジーを通じて新たな人と人のつながりを創造し、世界に通用する革命を起こすことを目指しています。この大きな志を達成するために働く人への投資を惜しみません。徹底した自社開発を行っており「テクノロジーに対する理解と投資」重視しています。2021年4月には総額18億円の資金調達を完了し、今後は更に積極的にテクノロジー、そして人に投資をしていく方針です。来年には、現在の2倍のエンジニアを採用する予定です。

企業カルチャーの特徴としては、Zealsは典型的な日本の会社ではありません。日本の伝統的な階層形システムや生産性より労働時間を重視するような働き方は全くありません。例えば、ZealsのCTOは20歳で就任しています。年齢ではなく、能力とやる気のある人に積極的にチャンスを与える文化があります。また、18ヵ国以上のバックグラウンドを持つグローバルメンバーなど、多様なメンバーが揃うフラットな環境です。フレックス制度、リモートワーク制度などが充実しており、柔軟な働き方も可能です。積極的に新しい技術を取り入れる社風があり、新しいテクノロジーが大好きなメンバーが集まっています。

グローバルかつ、エンジニアドリブンな企業であるZealsのカルチャーに共感いただける方にぜひジョインいただきたいと思っています！

Japanese Language Policy
At ZEALS, the product and technology team members primarily speak English (dev-related discussions happen in English on Github or Slack). There might be occasional discussions in Japanese, but most Slack messages are in English (or both languages).

As for meetings, all dev-related discussions take place in English. Given the above, Japanese skills are not required for most positions in the Product & Technology departments. However, one unique aspect of ZEALS’ culture is the desire to increase teamwork and engage with each other, which is why many Japanese members are working on their English skills while many non-Japanese members also work to improve their Japanese skills.

In order to build a truly global team, ZEALS has many multilingual members that proactively support the rest of the team to ensure smooth communications.

Even outside of the Product & Technology departments, all important company-wide announcements are made in both English and Japanese. For example, hiring announcements, new product launches etc. are generally announced in both Japanese and English.

Also, simultaneous interpretation for presentations at large meetings and events is provided to ensure that everyone gets the information they need.
Paid Leave
- All Japanese public holidays off
- 10 days of PTO (awarded 3 months after joining)
- Summer Holidays, Year-end Holidays, Childcare Leave, Congratulations/Bereavement Leave
Benefits
Here are some examples of the benefits which full-time employees can receive:

💻 Loaned Laptops

🇯🇵 Translation Support (EN<>JP)

👶 Shorter Work Hours for Employees Taking Care of Children

👶 Parental Leave

👕 Flexible Dress Code

💜 Social Security / Insurance Benefits Included

🏥 Healthcare Insurance, Periodic Health Checks

💚 Pension Insurance

🚃 Commuter Reimbursement
Remote Work
Although ZEALS requires you to either be in or relocate to Japan, once you’re here, you can choose whether you work from home or in the office.
- Full-time employees in Japan can work from home or come to the office. Transportation reimbursement to and from the office is available and people living close to the office can receive a housing allowance.
- If you’re not based in Japan yet, you can work from overseas while we help you obtain a Japanese working visa.
Work style
ZEALS is flexible when it comes to working hours. They have core time from 1:00pm to 3:00pm JST, but otherwise you’re free to set up your day however you want to meet the monthly working hour requirements.
Values

FROM ZEAL

< Passion >
Good things come from giving it your all

BET ON PARADOX

< Unorthodox >
Never settle for the established norm

UNITED WILL

< Team >
Teamwork is the heart of achievement

Office

The ZEALS office is in the heart of Tokyo, situated in Meguro, near Gajoen, a famous hotel known for hospitality. You can work from the office at a desk as well as use small booths or meeting rooms. You can hook your laptop to large screens and sit in Ergohuman chairs. Lounge areas and standing tables are also available. Everyone is free to choose the work style that works best for them, either full-remote or in the office.