Tech jobs

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 C# Git Java JavaScript +10 skills

Systems engineer at KJS, the IT development arm of the Kiyo Financial Group, working on a long-term project to standardize municipal local-tax systems and migrate them to the Government Cloud. Starts with development/support work and quickly moves into a PL-style lead role; stack includes Java, C#, Oracle/PostgreSQL, AWS/Linux and Kubernetes.

from 265K JPY / mo

TLT株式会社

エンジニア／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）

Engineer / project manager-leader for web, open-system, and mobile development projects at TLT Inc., a multi-business company whose IT department launched in 2025. You join small 2-3 person teams using various languages and environments, and mentor junior members. Requires 1+ years of IT engineering experience; based at project sites in Kanagawa.

4M – 8.5M JPY

株式会社フジテックス

BPR担当／パッケージ導入コンサルタント（ERP・SCM・CRM等）

In-house BPR / package-implementation consultant (ERP, SCM, CRM) at a diversified Tokyo trading company. Day to day the person improves customer- and sales-management operations: post-migration operation design, order/delivery/inventory/billing process improvement, sales process design, and sales activity analysis.

7M – 10M JPY

株式会社テラモト

テクニカルサポート／テクニカルサポート（ソフトウェア・ネットワーク）

Technical support for Teraoto's IoT service TERAS at a manufacturer of public-space equipment (trash bins, artificial turf, signage). Day to day: sensor/gateway setup and inventory, building customer dashboards on AWS, on-site device installation and testing, and post-shipment troubleshooting.

3.7M – 4.4M JPY

医療法人社団　千寿会

院内SE／社内システム開発・運用

In-house systems engineer (院内SE) at a regional core hospital in Noboribetsu, Hokkaido, handling server operation and management, internal network administration, system maintenance/operation, and staff PC setup. Beginners are welcome; experience with databases or medical-related systems is a plus.

3.6M – 4.1M JPY

Synthesy株式会社

ソリューションコンサルタント／システムコンサルタント（業務系）

Solution/system consultant at an AI & DX-specialized consulting firm founded by Big4 partners. Day to day: advising clients on business transformation, implementing systems with generative AI and cloud (Microsoft) tech, shaping AI/data strategies and PoCs, and planning Japanese launches of overseas SaaS. Tokyo office with remote work possible.

5M – 15M JPY

Synthesy株式会社

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 a boutique DX consulting firm in Tokyo founded by Big4 alumni. Day to day: helping clients drive digital transformation with AI and cloud — defining IT strategies and system requirements, building data analytics platforms, supporting cloud migration, and researching new business and tech trends.

6M – 15M JPY

コンセント株式会社

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）

In-house web/system engineer at a Tokyo-based gift retailer selling branded catalog gifts and gifts. You propose systemization plans, drive business-improvement initiatives, support rollouts and internal training, and handle maintenance and operations of in-house services; PHP experience is a plus.

4M – 6M JPY

カラソル株式会社

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

Systems engineer doing design through implementation and testing on projects matched to your strengths: enterprise core systems, medical/electronic-chart systems, crypto AI development, and smart-city AIoT. Main stack includes Java, C#, C, C++, and Python; offices in Tokyo, Saitama, and Fukuoka with some remote projects.

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

Development/system engineer at Realtech, an IT company in the Infroneer Holdings group that drives digital transformation for Maeda Construction — planning strategy, improving operations, and proposing and implementing solutions using AI, cloud, and other modern tech, from requirements definition through operations. Java experience required; Iidabashi, Tokyo office with flextime and light overtime

6M – 7.2M JPY

株式会社アイシーオー

組込・制御ソフト開発エンジニア／システムエンジニア(通信制御ソフト開発／制御系)

Embedded/control software engineer at a Yokohama-based software development firm: you handle embedded software design and development from basic design onward for clients in measuring instruments, semiconductor manufacturing equipment, communications devices, and automotive parts, working on-site at the HQ or client offices around Yokohama and Tokyo.

3.5M – 6.3M JPY

株式会社コスモアビリティ

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）

Systems engineer at Cosmo Ability, an IT firm that plans, designs, develops and deploys web-based business systems for clients in industries such as services, telecom and government. Day to day: requirements definition, basic/detail design, Java programming and testing, and system rollout support, working from the Tokyo HQ or client sites.

4.2M – 6M JPY

株式会社福岡銀行

データエンジニア／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）

Data engineer/system engineer at The Bank of Fukuoka (Fukuoka Financial Group) building and designing servers for customer-facing products, tuning databases, developing data-science backends and external APIs, and managing data integrity in a data-lake environment using Python, Java, and SQL.

Webアプリケーション開発エンジニア／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 Django Docker ECS Fargate +14 skills

Web application engineer/team lead at The Fukuoka Bank (core bank of Fukuoka Financial Group), refining requirements with planners and handling design, development, testing, refactoring, and reviews in 3–6 person scrum teams with 1–2 week release cycles. Main stack: Java (Spring Boot) and React on AWS.

7M – 15M JPY

日高精機株式会社

社内SE／社内システム開発・運用

In-house SE at Hidaka Seiki, a Nagano-based maker of heat-exchanger manufacturing systems for air conditioners. You'll maintain the core system, build and operate internal business systems, IoT-enable the main products, promote 3D CAD adoption, and drive company-wide DX in collaboration with each department.

240K – 350K JPY / mo

トーテックアメニティ株式会社

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）

Design, build, and operate IT infrastructure — servers, networks (LAN/WAN/Internet), groupware, and virtualization platforms — for end users such as municipalities, medical institutions, and large enterprises. Covers requirements definition through design, construction, and operations, working from offices in Kyoto, Shiga, or Tokyo.

4.4M – 8M JPY

トーテックアメニティ株式会社

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）

Systems engineer (SE) working either on local-government business systems (upstream work: requirements, design, development) or on production-management systems for manufacturers (proposals, requirements definition, rollout, add-on development). Open-systems development preferred with VB.NET, Java, C#, and SQL; based in Nagoya or Tokyo with no transfers.

パッケージ導入エンジニア／パッケージ導入コンサルタント（ERP・SCM・CRM等）

Package implementation engineer/consultant at a 50-year-old independent SIer in Osaka: gathers client requirements to deploy ERP/SCM/CRM packages, handles installation and upgrades on Oracle/SQL Server, provides post-deployment maintenance, and builds add-on customizations. About half the projects are direct end-user contracts with upper-process involvement.

Oracle SQL SQL Server

5.2M – 7M JPY

株式会社ランドコンピュータ

Salesforceエンジニア／パッケージ導入コンサルタント（ERP・SCM・CRM等）