Back-End Engineer - Integration Team

  • Tokyo
  • Remote OK
  • Full-time
  • May 29, 2024
4,000,000 - 12,000,000 JPY /yr
Apply from Japan Only
(You must live in Japan to apply)
Language Requirements
Japanese: Conversational
English: Conversational
Minimum Experience
Mid-level or above

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 the first and No.1 「Intent Sales」 company and one of the fastest growing start-up in Japan. 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 12 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. They’re smart but humble, they work hard but also have fun, they’re very different individuals but they work together to achieve our mission and goals. 


Your Job


You will be responsible for implementation of API integration between our flagship product **「Sales Marker」**and external sales support tools and Database design, including:

  • Implementation of API integration between Sales Marker and external tools
  • Development of the company's public API platform
  • Implementation around authentication such as OAuth
  • Database and system design



  • 2+ years of experience in Database and System Architecture design and review
  • 2+ years of experience in back-end development


Nice to have

  • Experience in Golang, Java, Kotlin or Python
  • Experience in OAuth implementation
  • Experience in Serverless implementation (AWS Lambda, API Gateway, etc.)
  • Experience implementing API integration for external tools such as Salesforce, HubSpot, Kintone, etc.
  • Experience in technical sales of sales support tools
  • Scratch development experience of API integration
  • Experience as a cloud server engineer


Why Us?

  • High growth business and strong financial foundation.
  • 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 Work, Purchasing Books, Free Weekly Lunch, Offsites, etc.


Our Tech Stack


  • TypeScript, React;
  • Libraries: Storybook, jest;
  • Hosting: Amplify



  • Infrastructure: AWS, ElasticBeanstalk;
  • DB: Aurora, ElasticSearch;
  • Languages: Node.js (Sales Marker), Python, Go;
  • Analysis environment: Athena;
  • Framework: Express;
  • Monitoring: DataDog;
  • Others: AWS Lambda, AWS Batch, AWS API Gateway, AWS Glue

Sales Marker is a SaaS start-up that provides B2B solutions that focus on "intent-based sales".

They use a methodology designed to identify and engage customers showing signs of needing a product or service.

Sales Marker leverages a database of 5 million corporate entities combined with dynamic intent data to enable precise targeting and effective engagement with potential customers.

View Sales Marker's company page

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Back-End Engineer - Integration Team at Sales Marker
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