Senior Fullstack Developer

Location requirement

You must already be living in Japan with valid work authorization. We are not sponsoring relocation or visa transfers from overseas for this role. Applications from outside Japan will not be considered.

Job Requirements/Responsibilities

• Design and ship complex features
• Frontend + Backend skills
• Product-centric, clean code, tests
• Mentor juniors

Tech Stack

• React/Vue/Angular/Next + Node/Java/Python
• PostgreSQL/NoSQL
• Docker/CI-CD

Interview Process

• Screening intro (30 min, video call)
  • Call with an Abbeal Lead Engineer. We qualify your expectations, background, relationship to the craft. No technical quiz — a real conversation. By the end, you know whether we continue together.
• Tech challenge (3-4 hours)
  • An open project, on your time, due within 5 days. No leetcode disconnected from the actual work. We evaluate your code under real conditions: prompt reading, architecture choices, tests, readability.
• System design (1 hour video call)
  • You walk us through an architecture you know in depth (a recent project, or an in-house topic). We dig into trade-offs, constraints, pivots. We want to see your depth on a domain you master — not test your cramming.
• Culture fit (45 min, in-person or video call)
  • With a founder (Sébastien or Vianney). We validate alignment: ownership, quality, client relationship, potential international mobility via Mobbeal. Your moment to ask all the hard questions.
• References + offer (5-7 days)
  • Currently based in Japan with valid work authorization — no relocation or visa sponsorship from overseas for this role
  • Two technical references called (with your consent). If everything fits, a detailed offer is sent — full package, Mobbeal mobility conditions if applicable, onboarding plan. You have 7 days to decide.

Note: Work contract via Abbeal.