Tech jobs

AI Claude Code C++ C# Ruby

Windows engineer/system engineer at OPTIM, a TSE Prime-listed AI/IoT company: develop and maintain Windows applications and agents in C++/C# with Win32API, analyze OS behavior to troubleshoot issues, and coordinate technical requirements across departments. Hybrid work from Tokyo HQ (3+ office days, up to 2 remote days).

4.5M – 7M JPY

日本オートマチックマシン株式会社

IT推進担当／社内情報化戦略・推進

大田区, 東京都

In-house IT promotion role at a Tokyo (Ota-ku) precision machinery manufacturer founded in 1932. The hire plans, introduces and maintains internal systems — core/production systems, IoT equipment-data collection and visualization, BI/AI adoption, in-house app development, web publishing and security — with monthly 2-night trips to the Yokohama and Fukushima plants.

SW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 Claude Code Cloud Kotlin Notion +2 skills

渋谷区, 東京都

Web application engineer on the 17-person Ticket Solutions team, continuously developing and improving the company's own electronic ticketing service 'CLOUD PASS' using Python and TypeScript (plus Kotlin) on AWS with CDK, working directly with sales and operations teams from the Hiroo office in Shibuya, Tokyo.

6M – 7.5M JPY

木村情報技術株式会社

AIシステムのSE／PM（プロジェクトマネージャー）／プロジェクトマネジャー・リーダー(WEB・オープン・モバイル系）

中央区, 東京都

Systems engineer / project manager leading the rollout and operation of AI services for pharmaceutical companies: gathering client requirements, coordinating between in-house developers and sales, estimating effort, and managing project delivery and system operations. Office-based in Nihonbashi, Tokyo at a company running live-streaming services for the medical and education sectors.

5M – 8.4M JPY

イセデリカ株式会社

社内SE／社内システム開発・運用

龍ケ崎市, 茨城県

In-house SE at Ise Delica, an egg-products manufacturer in Ryugasaki, Ibaraki. Day to day: implement and operate internal systems (production/sales management, WMS, groupware), manage networks and devices (routers, L2 switches, UTM), handle MDM/security, and provide help-desk/kitting support. On-site only; no remote work.

4.1M – 5.3M JPY

株式会社オプティム

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

AI Android C++ C# iOS +2 skills

Backend/system engineer at TSE Prime-listed OPTiM developing its MDM product 'OPTiM Biz': new features, requirements definition and basic design, adapting to Google/Apple spec changes, refactoring, and multi-platform testing (iOS/Android/Windows/Mac). Starts on Windows C/C++, expanding to other platforms. Hybrid: 3 office days + up to 2 remote days weekly.

5.7M – 7.5M JPY

株式会社ワイヤードビーンズ

Webアプリケーション開発プロジェクトリーダー／プロジェクトマネジャー・リーダー(WEB・オープン・モバイル系）

Apex AWS Bitbucket Cloud Confluence +16 skills

仙台市, 宮城県

Project leader/PM for web application development at Wired Beans in Sendai, managing EC site construction projects: tracking progress and issues, negotiating with clients and vendors, and handling requirements definition, basic design, and user stories. Stack centers on JavaScript/TypeScript, PHP, Python, Go, Salesforce Commerce Cloud, and AWS/GCP.

4M – 5.3M JPY

株式会社弘洋第一コンサルタンツ

社内SE／社内システム開発・運用

杉並区, 東京都

In-house SE in the DX promotion office of a civil-engineering consulting firm, leading IT infrastructure planning (network/server renewal, security, RFPs, vendor control), device kitting/asset management and helpdesk support, plus M365/SaaS/iPaaS/AI-driven business automation.

6M – 7M JPY

株式会社ダイフク

社内SE／社内システム開発・運用

蒲生郡日野町, 滋賀県, 大阪市, 大阪府

------------------------------------------------ ■ この求人のポイント ------------------------------------------------ <東証プライム上場>マテハン業界世界TOPクラスのパイオニア企業◎安定した環境で長期キャリアを築けます！…

4M – 9M JPY

株式会社インフィニットコンサルティング

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 Infinite Consulting, a Solxyz-group consulting firm in Tokyo: gathers client requirements, proposes IT strategies and system renewals, writes RFPs, selects external vendors, and supports project management as a neutral third party. Clients include major firms such as ANA, Yakult, and Yahoo.

7M – 9.5M JPY

株式会社トップエンジニアリング

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）

千葉県, 東京都, 神奈川県

Infrastructure engineer at Top Engineering, an IT services firm within a Tokyo-listed group. Hires start with one month of IT training, then do system operations/monitoring and helpdesk work, progressing to designing and building IT infrastructure (LAN/WAN networks, servers, security, databases) on client projects across the Tokyo area.

from 207K JPY / mo

泰榮ソリューションズ株式会社

IT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）

新宿区, 東京都

Systems engineer at an SIer in Shinjuku, Tokyo: handles the full cycle from client requirements gathering through design, development, and testing of business systems (e.g., payroll/invoice management) using .NET and Java. Seeks ~4-5 years of SE experience; on-site work with monthly salary of ¥250,000-410,000.

社内SE／社内情報化戦略・推進

In-house SE at a Nomura Real Estate Group building-management company, leading internal DX projects: promoting Kintone-based paperless workflows and RPA-driven efficiency while driving adoption of these tools across the company. Requires security literacy across infra, platform, and apps when building on SaaS.

5.5M – 8M JPY

株式会社ロッキー

ファームウェア設計／システムエンジニア(通信制御ソフト開発／制御系)

新宿区, 東京都

Firmware/system engineer at a 50-year-old electronics board manufacturer (maker + trading functions) in Shinjuku, Tokyo. Day to day you develop embedded firmware for microcontrollers and SoCs (especially Linux-based) used in boards for fields like medical and air traffic control, from spec review through design and manufacturing.

4M – 8M JPY

株式会社4COLORS

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

New APACFull-timeLead

横浜市, 神奈川県

QA lead engineer for 4COLORS' patented SaaS 'PIP-Maker' (generates avatar videos from PowerPoint for e-learning, training, and sales use at major firms). The role redesigns QA from scratch: building automated tests with Playwright and GitHub Actions, applying generative AI to test cases, and hardening/monitoring the Azure environment.

6M – 8M JPY

株式会社ユニエイム

開発アシスタント／プロジェクトマネジャー・リーダー(WEB・オープン・モバイル系）

渋谷区, 東京都

Development assistant / project manager (not an engineer role) supporting the in-house multi-channel POS platform 'CASHIER' in a 21-person POS division: defining specs, managing plans/schedules and task allocation, testing/QA, and bridging customer support and engineers using Slack, Google Workspace, and Notion, with a path to management and upstream work.

4.5M – 7.5M JPY

株式会社トップエンジニアリング

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）

株式会社パン・パシフィック・インターナショナルホールディングス

千葉県, 東京都, 神奈川県

Infrastructure engineer at a Tokyo-area IT services company (core firm of a TSE Standard-listed group), working on client projects across Tokyo, Kanagawa, and Chiba. Day-to-day spans ops/monitoring and helpdesk up to designing and building IT infrastructure — LAN/WAN networks, servers, security, and databases — with staged growth from junior to specialist roles.

3.3M – 6M JPY

データ管理スタッフ／社内情報化戦略・推進

市川市, 千葉県

------------------------------------------------ ■ この求人のポイント ------------------------------------------------ 売上高2兆円超を誇る小売業界トップクラス企業の成長を「データ活用」の根底からリードしませんか？…

5.3M – 6.3M JPY

NCD株式会社

ITエンジニア／プログラマー（WEB・オープン・モバイル系）