Software Engineer, Backend – Foundation, Mercari Marketplace (Tokyo – Visa & Relocation Provided)

Mercari is Japan's first unicorn startup and the country's most widely used peer-to-peer marketplace. The group spans Mercari, Merpay (fintech) and Mercoin (crypto), and it is one of the most established routes into Japanese tech for international engineers.

This role sits on the Foundation team within Mercari Marketplace — the core platform work underneath Japan's largest consumer marketplace.

**Why this matters for anyone considering Japan**

Mercari runs a documented relocation programme rather than an informal willingness to sponsor. Their careers site states the package covers obtaining your visa, shipping your belongings, booking your flight, and finding somewhere to live, with specifics confirmed at the offer stage.

Two points stand out:

- The package extends to **partners and dependents aged 18 or under**
- Mercari explicitly provides visa support for those in **same-sex marriages and de-facto relationships**, asking candidates to raise it early in the process so it can be accommodated

That second point is unusually clear for Japan, where such recognition is not guaranteed.

New joiners are onboarded in English, and engineers go through DevDojo, Mercari's in-house technical training programme covering the group's development practices and tech stack.

**Confirmed working conditions**

- Employment status: full-time
- Work hours: **full flextime, with no core time and no flexible time band**
- Office: Roppongi, Tokyo
- Probationary period: first three months, on the same contract conditions as a permanent employee
- Mercari operates a work style policy called "Your Choice," under which members choose between working in the office or fully remotely, with exceptions for certain kinds of work

**On the role detail**

Mercari publishes its full job descriptions through a careers page that loads dynamically, so the detailed responsibilities, requirements and tech stack for this specific position are not reproducible here. **Read the full description on the apply page before applying** rather than relying on this summary.

What can be said with confidence is that this is a backend engineering position on a foundational platform team, at a company operating consumer marketplace and fintech products at national scale.

**Honest caveats**

This is a **Tokyo-based role**, not remote-from-anywhere. It is filed under visa-sponsored rather than remote for exactly that reason — the value here is the route into living and working in Japan, not location independence.

No salary figures are published. Japanese language ability is not stated as a requirement, and Mercari is among the more English-friendly employers in Tokyo, but confirm language expectations for your specific team during the process.

**A note on the listings themselves**

Many Mercari postings carry both English and Japanese job descriptions on the same page, sometimes with the Japanese version first. If the page opens in Japanese, scroll down — the English description usually follows.

Applications go through Mercari's own Workable careers system.