About Us

At Sales Marker, our mission is to create a world where all people and companies can challenge themselves beyond existing boundaries. We’re one of the fastest growing start-ups in Japan and we’re growing at a speed that is twice as fast as Unicorn startups. By using our product, sales teams can improve their work efficiency by 3 times. We have achieved over 900% YoY business growth rate in 2.5 years since our flagship product 「Sales Marker」 was released and we’re currently actively working on a wide range of new product portfolios.

The Team

Our co-founders are from top companies in Japan and the world such as NRI, Keyence, LINE, Microsoft, and PwC. They were selected as 「FORBES 30 UNDER 30 ASIA LIST」 in 2023 . In our Engineering & Product team, we have members from more than 16 countries and they come from top tech companies in the world such as Google, Microsoft, Indeed, and famous tech companies in Japan such as Mercari, LINE, Yahoo, Smartnews, etc. 

Responsibilities

As a strategic role reporting directly to the CTO, you will be at the forefront of driving our AI Agent development. This position goes beyond a typical engineering role, involving significant engagement in strategic decision-making and the direction of our products. You will take a leadership role in building the next generation of AI Agents, driving innovation through collaboration with internal and external stakeholders. You will also lead large teams, leveraging the latest AI technologies to develop and operate next-generation enterprise solutions.

• Provide technical leadership for AI Agent development projects.


• Design and select system architectures.


• Provide technical support and conduct code reviews for team members (senior and junior).


• Coordinate technically with external stakeholders (Product, UX, Research, etc.).


• Evaluate cutting-edge LLM and agent technologies and formulate adoption strategies.

Requirements

• Have meaningful experience with building (and rebuilding) production systems to deliver new product capabilities and to handle increasing scale


• Care deeply about the end user experience and take pride in building products to delight customers


• Experience leading development teams or managing projects with multiple members.


• Large Language Model Integration: Experience working with LLM APIs (e.g., OpenAI, Anthropic) and integrating them into agent workflows for natural-language understanding and generation


• Agent Solution Design: Ability to design and build deployable AI agent solutions and best-practice templates for internal and external stakeholders


• Cloud Platform Expertise: Hands-on experience with AWS, GCP, or Azure to deploy, scale, and secure AI services in production


• Database Design & Optimization: Expertise in designing scalable database schemas, indexing strategies, and query optimization for high-performance applications


• Understanding and practical experience with Model Context Protocol (MCP).


• Business-level English proficiency.
   

Nice to Have

• Agent Orchestration Frameworks: Familiarity with platforms like LangChain, Rasa, or Restack to build, evaluate, and iterate on AI agent workflows


• Benchmarking & Evaluation: Experience with tools and methodologies to measure agent accuracy, reliability, and on-brand performance


• Experience promoting projects in startups or R&D departments.


• Experience with technical presentations and public speaking, both internally and externally.

Our Tech Stack

[Front-end]

• TypeScript, React;


• Libraries: Storybook, jest;


• Hosting: Amplify

[Server Side/Back-End]

• Infrastructure: AWS, ElasticBeanstalk


• DB: Aurora, ElasticSearch;


• Languages: Go, Typescript


• Analysis environment: Athena;


• Framework: Express;


• Monitoring: DataDog;


• Others: AWS Lambda, AWS Batch, AWS API Gateway, AWS Glue

Why Us?

• One of the fastest growing Saas startup in Japan with strong financial growth


• Innovative new product development and opportunity to build things from scratch.


• Plenty of leadership and career development opportunities.


• Full remote-friendly & full flexible work schedules.


• Global team and English speaking environment.


• Great benefits & perks packages such as Resort Worx, Purchasing Books, Free Weekly Lunch, Offsites, etc.

Working Style

● Remote Work

We’re remote friendly. We use Zoom and Meet, and recently introduced the virtual office platform Gather to maintain both the quality and quantity of communication while working remotely, ensuring smooth development and operations. 

● Flexible Work
You are free to customize your daily working hours.Taking into account the situation within the company and your team, you will manage your schedule and tasks within reasonable limits. Each employee adjusts their working hours to meet the monthly requirement of 8 hours per working day.

● Work-Life Balance
We value a healthy work-life balance.Whether you want to focus heavily on work or prioritize your personal time, we believe this is an environment where both approaches can thrive.

Read More

■Career Page: https://sales-marker.jp/corporate/en/(https://sales-marker.jp/corporate/en/)

■Culture Book: https://speakerdeck.com/salesmarker/sales-marker-culturebook-en(https://speakerdeck.com/salesmarker/sales-marker-culturebook-en)
■YouTube: https://www.youtube.com/watch?v=Ob8Ds06zwo0(https://www.youtube.com/watch?v=Ob8Ds06zwo0)

【職種 / 募集ポジション】
Lead Software Engineer - Backend AI Agents
【雇用形態】
正社員
【給与】
年収 8,000,000円 〜 25,000,000円
【Additional Notes about Compensation】
※The actual offer will be decided based on your experiences and skills.
【勤務地】
150-6032 Level 32, Yebisu Garden Place Tower, 4-20-3 Ebisu, Shibuya-ku, Tokyo
【Office Location】
5 minutes walk from the east exit of Ebisu Station on the JR Yamanote Line
7 minutes walk from Exit 1 of Ebisu Station on the Tokyo Metro Hibiya Line
【Probation Period】
6 months (same conditions during probationary period)

会社情報

【会社名】
株式会社Sales Marker
【設立年月】
2021年7月29日
【本社所在地】
〒150‐6032
東京都渋谷区恵比寿4-20-3 恵比寿ガーデンプレイスタワー32F
【資本金】
1億円
【従業員数】
270名（取締役4名＋正社員170名＋業務委託80名）