This position is closed and is no longer accepting applications.

Full Stack Software Engineer

Kraken Minato-ku, Tokyo October 14 2025
  • 💴 No salary range given
  • 🏡
    Partially remote
  • 🗾 Japan residents only
  • 💬
    No Japanese required
    Business English
  • 🧪
    Intermediate to senior levels
    Unspecified years of experience

About Kraken

Kraken Minato-ku, Tokyo

We believe energy should be better - for you and the environment. We’re a leading energy technology company providing a better experience for our customers through transparency, honesty and simplicity.

Key benefits

  • Flexible working environment
  • Unlimited vacation policy
  • Equity Options Scheme

About the position

The team is responsible for the overall look and feel of the software our Specialists use at Kraken, working directly on some of its pages, and being responsible for our in-house component system. Our work empowers Kraken’s many backend teams to build amazing features without having to worry about CSS and JavaScript getting in their way, setting patterns across Django templates, React and HTMX. They are also responsible for widely-used frameworks in Kraken!

Although this is a full-stack role, we’re specifically looking for a strong backend developer in Python with a solid understanding of Django, to help us become even more of a full-stack powerhouse.

Responsibilities

  • We have lots of difficult design challenges to solve. The Japanese energy market is complicated, outdated and process-heavy - there’s an awful lot of domain modelling that we need to get right. Strong attention to detail is essential.
  • We have difficult technical problems to solve. With the advent of smart meters, we’ll soon be processing millions of meter readings a day. We need the right technology in place to handle this smoothly as well as feeding data into a machine learning pipeline that models and predicts consumption.
  • There’s a great opportunity for disruption in the Japanese energy market. The energy landscape is changing as we move to more dis-aggregated forms of generation, with less predictability, more dynamism and smarter technology.
  • You’ll be working for a company that’s fighting climate change. Our parent company is the largest investor in solar generation in the UK, and are funding wind and anaerobic digestion. As a supplier, we’re helping people to use greener technology and renewable energy, all helping move the UK towards a lower carbon future.

Requirements

  • We’re looking for someone with a general interest in technology and problem-solving; someone diligent and thoughtful. It would be helpful to have experience/expertise in the following (in rough priority order):
    • Python / Django backend
    • React / TypeScript frontend
    • Domain modelling
    • HTTP and REST APIs
    • Writing robust and fault-tolerant software
    • Celery and async processing
    • Postgres

Nice to haves

While not specifically required, tell us if you have any of the following.

  • AWS
  • Terraform, Packer, Consul
  • Ability to speak Japanese would be a plus

Meet Kraken's Developers

Jos is a senior software engineer and team lead of the payments and collections team at Kraken. He is also a line manager and a tech lead. Jos tells us about the environment at Kraken, what his job involves, and what makes working there so rewarding.

Read their story...

Polly Sutcliffe came to Japan on the JET programme. After working as a translator, she pivoted her career through a coding bootcamp. Now she's a frontend developer at Kraken, where she works on their consumer-facing portal.

Read their story...

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