Communications Network Engineer

This position designs and develops maritime communications infrastructure using very small satellite systems and VDES (VHF Data Exchange System). The planned applications support two-way ship communications, data services, position information management, and monitoring of ocean conditions.

The role addresses technical challenges specific to satellite networks, including dynamically changing network topologies, adaptive routing and scheduling, frequency management, interference avoidance, communications-quality optimization under space-environment constraints, and remote management of operations and maintenance. Responsibilities include designing upper-layer network architecture for low-latency data routing, developing security designs such as advanced encryption methods, optimizing QoS management and dynamic slot allocation, defining operations and maintenance requirements, and supporting applications such as autonomous navigation.

Day-to-day work covers overall design, requirements definition, and detailed design for VDES networks serving maritime users; protocol design and optimization for ship-to-ground communications through satellites; communications infrastructure design and operational planning for ground stations; and research, selection, and optimization of existing network technologies. The engineer will coordinate with satellite development, software engineering, and operations teams.

The posting requires broad experience across upstream and downstream design. Interest in zero-based design and building new networks, together with the ability to adapt flexibly, is sought. No specific education or years-of-experience threshold is stated.

Named tools and technologies include Windows, Linux, GitHub, GitHub Projects V2, GitHub Issues, Redmine, Git, C, C++, Python, MATLAB, and network simulation tools such as NS-3, whose selection will also be considered. A company-specified PC is provided according to the employee’s preference.

The work location is the Ariake office in Koto, Tokyo. The posting states that work is generally performed in the office, with partial remote work available. The stated work location may change to company-designated locations, including places where telework is performed. Indoor smoking is prohibited throughout the workplace. The selection process consists of document screening, a first interview, a second interview with an aptitude test, and a final interview.