Back-End Engineer - Platform 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: Not Required 👍
English: Conversational
Minimum Experience
Junior 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 the overall backend development of all of our existing and new product lines including our flagship product 「Sales Marker」. If you prefer, you can have the opportunity to make use of your front-end, machine learning, SRE, and other skills in our team as well.



  • 3 years of experience (flexible as time ≠skills) working as a backend engineer, preferably in a tech or product-focused company.
  • Proficiency in schema design and efficient database querying (MySQL, ElasticSearch, MongoDB).
  • Strong experience in backend application architecture, performance tuning, and monitoring.
  • Proactive ownership of projects from conception to completion.
  • A continuous improvement mindset, challenging the status quo to enhance system performance.


Nice to have

  • Strong Experience working with MySQL.
  • Familiarity with ElasticSearch, Redis, and MongoDB.
  • Experience in handling large data processing pipelines and batches.
  • Proficiency in containerization, cloud deployments (AWS preferred), and CI/CD processes.
  • History of handling major incidents in large tech companies.
  • Background in fast-growing companies at stages comparable to Sales Marker.
  • Domain expertise and contributions to popular Open Source projects.
  • Experience with TypeScript and Go in backend service operations.
  • Leadership experience as a Tech Lead, overseeing backend service development.
  • Fluency in English or Japanese.


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

Search jobs from Sales Marker in Japan
Back-End Engineer - Platform Team at Sales Marker
APPLY NOW  ➜🇯🇵 Residents Only