What Siei is hiring right now
Open roles read straight from the applicant tracking system on Siei's own career page, not from a job board. Counted daily, so the direction is visible as well as the number.
| Open roles | 60 |
| Departments | 19 |
| Countries | 1 |
| Flagged remote by the employer | 0 (0%) |
| Posted in the last 30 days | 7 |
| Median age of an open role | 73 days |
| Roles first seen in the last 14 days | 3 |
| Roles we have seen close | 16 |
Where the hiring sits: Admin (FSEE) (11), Network / Core Engineering (8), Team Asobi (6), LSI (6), Tokyo PP (3).
Where the roles sit, as the employer lists them: Japan, Tokyo (59), Tokyo, Japan (1).
Countries with the most openings, where the listing resolves to a country: Japan (60).
The roles posted most recently
| Role | Where | Posted |
|---|---|---|
| シニア セキュリティエクスポージャー＆アーキテクチャ エンジニア/Senior Security Exposure & Architecture Engineer | Japan, Tokyo | 2026-10-01 |
| PlayStationハードウェアの国際物流管理 (リーダー候補) | Japan, Tokyo | 2026-09-29 |
| PlayStation 商品戦略・分析担当 / Strategy Analyst, PlayStation, Creator and Market Intelligence（CMI） | Japan, Tokyo | 2026-09-10 |
| PlayStation向けカスタムLSI開発評価エンジニア（オーディオIP・SoCシステム） | Japan, Tokyo | 2026-09-06 |
| PlayStation向けSoC製造検査ソフトウェアエンジニア | Japan, Tokyo | 2026-09-06 |
| PlayStation向けカスタムLSIの開発評価エンジニア（Graphics） | Japan, Tokyo | 2026-09-06 |
These are the six most recent of 60, as Siei published them. The wording is the employer's own; we do not rewrite a job title any more than we rewrite a filing.
Why the count alone says little
A large company always has hundreds of open roles. What carries information is which way that number moves, and which departments it moves in. We record both openings and closures, so a role disappearing from Siei's careers page is a recorded event rather than a silent absence.
Half of these roles have been open for more than 73 days. A long median is not by itself a sign of trouble - some roles are hard to fill and some boards are simply pruned rarely - but it does mean the headline count says less about this month than it appears to.
Being straight about what this is
Not advice, and not a complete picture. This is one company's own careers page. It says nothing about revenue, headcount or plans, and we do not claim otherwise.
A short observation window. We started recording opens and closes on this set in August 2026, so "what changed" is weeks deep and grows daily. The posting dates above come from the employer and reach back further than our own record.
Refreshed once a night, read from eleven applicant tracking systems. No salary fields and no candidate data: they are not in the source.
DataSignals Lab publishes data and research. Informational only, not investment advice, not an offer or solicitation. Every figure links back to the official filing so you can verify it yourself.