Full stack engineer with strong backend skills

  • Tokyo
  • Remote OK - Anywhere in Japan
  • Full-time
  • December 23, 2023
5,700,000 - 9,000,000 JPY /yr
Apply from Japan Only
(You must live in Japan to apply)
Language Requirements
Japanese: Not Required 👍
English: Fluent
Minimum Experience
Mid-level or above

"Mamoru Biz" is to reduce unproductive work though QR code and app Using QR and authentication technology, you can easily manage seats, schedule appointments, manage company equipment, and send mail.

We are looking forward to further evolving these services and developing new features. We are looking for a developer who can be entrusted with the development of microservices.

  • Collaborate with product managers, designers and engineers to deliver high-quality frontend components and backend services
  • Participate in and contribute to the planning processes to design products that fit within business and technical constraints
  • Respond quickly and independently to the rapidly changing needs of users
  • Develop and optimize both backend and frontend service and infrastructure


  • Experience in mid- to large-scale service development and operations including infrastructure (more than three years)
  • Whole system architecture design (more than 3 years)
  • Development and operation experience in a cloud or virtual environment
  • Experience developing systems using server side languages (C++, PHP, Ruby, Java, Python, Go, etc.) (more than 5 years)
  • Experience in design and operation of database infrastructure (SQL Server, MySQL, PostgreSQL, NoSQL) (more than 3 years)
  • Excellent communication skills
  • Proficiency of JavaScript / TypeScript, CSS, or HTML and experience with modern frontend frameworks (React, Vue, Svelte, etc) is a plus
  • Able to use Japanese or English at a fluent or native level

Working Conditions

Employment Status


  • Probationary period: First 3 months after joining the company. (During this period your contract conditions will be the same as that of a permanent employee.)

Work Hours and Work Place

  • Scheduled working hours:9 AM – 6 PM (Core time:10 AM - 2 PM)

  • Hybrid work style of coming to the office and working remotely. Many of us come to the office about half a day a week. You can come to the office at your free time, avoiding crowded train times.

  • There are also people who live in remote areas outside the Tokyo suburbs, and they basically work remotely. They come to the office about once a month on business trips.

  • We have no plans to go back to office commuting altogether. We will continue to do hybrid work, mainly remote work.


  • Two days off per week (as well as national holidays, New Year's break, etc.)

  • Paid leave, congratulatory and bereavement leave, sick leave


  • 12 months salary and bonuses paid in summer and winter.

  • Based on skills, experience, and abilities

  • Reviewed 4 times a year


  • Various social insurance benefits included

  • Work from home available

  • Support programs for self-improvement and career development (language learning, etc.)

  • Monthly business trip expenses for domestic local residents (up to 30,000 yen)

Selection Process

  1. Solve our coding challenge

  2. 2 (or 3) interviews with our engineers and HR
  3. Interview with our CEO

Colorkrew's vision is to become a visionary company that makes work fun for the whole world.

They’re building several in-house products such as Colorkrew Biz, which is a business concierge service that solves administrative issues using QR and authentication technologies, and Goalous, a social network for companies that focus on managing company goals like OKRs.

They also do consulting work across a wide variety of areas such as cloud integration, marketing and promotion, payments, server architecture and more. Colorkrew’s development team is made up of talented people from many different countries, and they maintain a vibrant, international environment. It’s also one of the first companies in Japan to adopt a truly flat hierarchy, eliminating all job titles and departments in order to maximize the impact of each individual. At Colorkrew, they have a culture that values employee autonomy, and flexibility.

They want their employees to be able to do their best work, so Colorkrew allows remote work, as well as “20% time” as long as you complete your scheduled work. They also have some great benefits. Thanks to their supportive company culture that fosters growth and teamwork, the average tenure of their engineers is about 5 years, which is much longer than most tech companies in Japan. This is a testament to how much people enjoy working at Colorkrew.

They also hire new graduates and interns to work on their engineering team, which is relatively rare for companies hiring non-Japanese engineers and candidates from abroad (most companies limit their overseas hiring to more experienced positions). We think this could be a great opportunity for someone who wants to start their engineering career in Japan and work alongside talented senior engineers to gain experience while also experiencing Japan!

View Colorkrew's company page

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Full stack engineer with strong backend skill... at Colorkrew
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