Tech jobs

アプリケーション開発／システムエンジニア（アプリ設計／WEB・オープン・モバイル系）

Build Windows-platform software at Karina System, a Kobe-based specialist in medical products whose surgical video recording/management system holds top-class domestic market share. Day-to-day covers server service apps, web apps, client viewing/editing apps, and embedded products, developed in C# or C++.

4M – 7M JPY

カリーナシステム株式会社

フィールドエンジニア(メンバー)／テクニカルサポート（ソフトウェア・ネットワーク）

Field engineer/technical support at a Kobe company whose core product is a top-market-share surgical video recording/management system. The role covers pre-installation consultation with doctors, nurses and hospital IT staff, equipment setup and user training, and post-launch support/inspection, with 1–3 business trips per week across western Japan.

4M – 7M JPY

株式会社メトリック

ITインフラエンジニア／ネットワーク設計・構築（LAN・WAN・インターネット）

IT infrastructure engineer at a Sapporo IT solutions firm: works in a team of specialists to propose, design, and build servers, storage, networks, OS, databases, monitoring, backup, and cloud (AWS, IBM Cloud) environments, mainly on-premise with a growing AWS focus. Requires 3+ years of IT infrastructure experience and independent design/build skills.

システムエンジニア・プログラマー／システムエンジニア（アプリ設計／WEB・オープン・モバイル系）

Java Linux Oracle PHP Python +2 skills

Systems engineer/programmer in Sendai working on client system development and maintenance projects — manufacturer core systems, mainframe operation/maintenance, financial institution systems, and business applications — using COBOL, Java, PHP, Python, and .NET with Oracle/DB2 on Linux/UNIX/Windows/mainframe environments.

3M – 5.1M JPY

株式会社ファイブピット

維持管理保守業務／サーバ・マシン運用・監視

Server/machine operations and monitoring engineer for financial systems at Fivepit in Aomori: day-to-day operation, maintenance, and monitoring of banking-related systems, plus some system modification work (design, build, test). COBOL is used but on-site training is provided.

200K – 266K JPY / mo

テクノシステム株式会社

システムエンジニア／システムエンジニア（アプリ設計／WEB・オープン・モバイル系）

Bash C++ .NET Java Linux +5 skills

Systems engineer at a SARA Group (Prime Market-listed) system-engineering firm that builds factory software for semiconductor plants. Day to day: external/detail design, C++/C# programming, acceptance testing, and on-site deployment of transport-control systems at factories in Japan and overseas (business trips involved).

4.8M – 10M JPY

株式会社未来工房亞主

SE(制御/組込系)／システムエンジニア(通信制御ソフト開発／制御系)

System engineer (SE) for control/embedded and communication-control software: day to day covers design, programming, testing, evaluation, and deployment of web/open-system development for core-business, medical, and local-government clients, mostly on-site at client offices in Fukuoka. First 3–5 years embedded at client sites, then moves to in-house development. Uses C/C++/C# on Windows/Linux/RTOS

ソフトウェア開発エンジニア／システムエンジニア(通信制御ソフト開発／制御系)

Software engineer who maintains and customizes the company's own early earthquake warning systems and seismometers, develops display devices, and performs version upgrades using C, C++, and C#. Embedded/control software development at a stable 30+ year-old company in Kunitachi, Tokyo.

システムエンジニア／システムエンジニア（アプリ設計／WEB・オープン・モバイル系）

AWS Bitbucket .NET Git JavaScript +7 skills

Systems engineer at Techno System (a Sara Group company) developing its own MES package 'Jisseki Hanchō' for manufacturing plants — covering requirements definition, design, coding, testing, on-site rollout, and maintenance. Stack includes C#/.NET, TypeScript, Go, React/Next.js, AWS, and SQL Server/Oracle.

4.8M – 10M JPY

ロンググロウ株式会社

ITエンジニア／システムエンジニア（DB・ミドルウェア設計／WEB・オープン・モバイル系）

ITエンジニア/システムエンジニア at ロンググロウ, doing mainframe-to-open-environment (cloud) migration projects — the company's core rehosting/migration business, including AI-assisted migration tooling — using Assembler, COBOL, PL/I, C and Java, plus on-site client testing. Office-based in Shinjuku, Tokyo.

システム開発・構築／システムエンジニア（アプリ設計／WEB・オープン・モバイル系）

A system engineer at a Sapporo-based civil engineering/construction consultancy (founded 1958) who designs, develops, deploys, and maintains GIS and business systems, builds geographic information data and databases, and provides client support/consulting. Core tech: GIS, web/business systems, SQL, database design.

PL・PM／システムエンジニア（アプリ設計／WEB・オープン・モバイル系）

PM/PL (including sub-leader/scrum master) leading smartphone and web app development projects at Ibis Inc., the company behind the ibisPaint drawing app. The role mixes project leadership, some hands-on implementation, pre-sales support, and team goal-setting/evaluation. Based at the Nagoya HQ, with hybrid/remote work possible.

5M – 6.5M JPY

株式会社未来工房亞主

SE(基幹業務/Web・オープン系)／システムエンジニア（アプリ設計／WEB・オープン・モバイル系）

C++ C# .NET Java Oracle +5 skills

System engineer building web/open-system applications for mission-critical business, medical, and local-government systems, working embedded at client sites (90%+ in Fukuoka City) for the first 3–5 years before moving in-house. Work spans design, coding, testing, and deployment using Java, .NET, C/C++, PHP and Oracle/SQL Server/PostgreSQL/MySQL.

245K – 370K JPY / mo

株式会社MHIパワーコントロールシステムズ

組込・制御設計／システムエンジニア(通信制御ソフト開発／制御系)

Control systems engineer at a Mitsubishi Heavy Industries group manufacturer, designing, setting up, and verifying power-plant control systems — network buildout, PC/server setup, communication testing, on-site troubleshooting, and control panel design. Core tech: Windows/Linux servers, TCP/IP networking, and control equipment.

TCP/IP VLAN

4.8M – 6.3M JPY

株式会社MHIパワーコントロールシステムズ

セキュリティエンジニア／ネットワーク設計・構築（LAN・WAN・インターネット）

Security engineer at a Mitsubishi Heavy Industries group company that builds control systems for power plants. The role covers security system development, LAN/WAN/Internet network design, server environment setup, and design, testing and maintenance of related Windows/Linux software to protect energy infrastructure.

ITコンサルタント／システムコンサルタント（業務系）

IT/system consultant at Miyazaki Bank, a regional Japanese bank. The role drives efficiency projects such as net banking and cashless services, gathers business requirements for IT adoption, and mentors junior staff, leveraging experience with ERP rollouts, low-code/RPA automation, or project management.

4M – 10M JPY

TRUSTART株式会社

PdM／プロダクトマネジャー（パッケージソフト・ミドルウェア）

Product Manager for TRUSTART's real-estate big data product: owns growth strategy from roadmap and prioritization through release, working with dev and business teams. Day-to-day covers KPI setting, A/B testing, spec definition, market/competitor research, and user interviews, with SQL-based analysis and tools like ChatGPT, Notion, and Slack.

5M – 8M JPY

TRUSTART株式会社

Webエンジニア／システムエンジニア（アプリ設計／WEB・オープン・モバイル系）

Full-stack engineer building and operating TRUSTART's in-house real-estate big-data SaaS: frontend with React/TypeScript, backend and APIs with Python (Django) or Ruby on Rails, AWS infrastructure, plus UI/UX improvements, test automation and code reviews. On-site in Hatchobori, Tokyo, with a path toward team lead.

データオペレーションスタッフ／テクニカルサポート（ソフトウェア・ネットワーク）