Software Development Engineer (Routing features) - Kawasaki

Lacework

Lacework

Software Engineering

Japan

Posted on May 19, 2026

Location: Kawasaki (Japan)
Join Fortinet, a cybersecurity pioneer with over two decades of excellence, as we continue to shape the future of cybersecurity and redefine the intersection of networking and security. At Fortinet, our mission is to safeguard people, devices, and data everywhere. We are currently seeking a dynamic Software Development Engineer to contribute to the success of our rapidly growing business.

As a Software Development Engineer, you will:

  • Act as a member of the Software Development Department, be responsible for software development of LAN switch products.
  • Work with internal teams to investigate current and future architectures, requirements, and technology needs.
  • Be responsible for one or more routing and related software functions/modules embedded in the product, and develop them through basic design, detailed design, coding, testing, and bug fixing.
  • Work cross-functionally with software development, hardware development, and quality assurance to deliver high-quality products.
  • Proactively participate in solving technical and complex issues.
  • Research and apply new technologies and tools relevant to product development.

We Are Looking For:
An insightful and influential collaborator to join our team. We encourage you to apply for this position if you have the following qualities:

  • 3+ years of software development experience in the IT/software industry.
  • Experience in UNIX software development using the C programming language
    ‒ Experience with TCP/UDP socket programming or other API development is a plus
    ‒ Experience with Python or other programming language is a plus
  • Knowledge and development experience in routing-related technologies, including:
    ‒ Static and dynamic routing technologies such as BGP, OSPF, and IS-IS, using frameworks such as FRRouting(FRR), Quagga, GateD, etc.
    ‒ Advanced technologies such as EVPN-VXLAN, SRv6, etc.
    ‒ Knowledge of authentication technologies.
  • Ability to investigate and analyze the Linux kernel and modify source code when defects are identified.
  • Basic knowledge of networking, including Layer 2 and Layer 3 technologies, and basic operation and configuration of network switches.
  • Experience in one or more of the following areas (experience in all areas is not required):
    ‒ Experience in building the development environment
    ‒ Experience in implementing vulnerability countermeasures based on information from CERT and other sources.
    ‒ Experience developing with chip vendor SDKs
    ‒ Experience developing hardware control for embedded devices
    ‒ Experience developing system management for embedded devices
    ‒ Experience developing user interface and business logic applications for embedded devices
    ‒ Knowledge and experience with switch chips in network equipment
    ‒ Knowledge and experience with BIOS and Bootloader technologies
    ‒ Knowledge and experience with Layer 2 network protocols
    ‒ Knowledge and experience with Layer 3 network protocols
    ‒ Knowledge and experience with network switch security features
    ‒ Knowledge and experience with technologies such as REST API, NETCONF, SNMP, Telemetry, ansible, etc.
  • Smooth communication and negotiation with stakeholders.
  • Team-oriented mindset.
  • Strong curiosity about new technologies.
  • A passion for developing high-quality products.
  • Native-level Japanese proficiency.
  • Ability to read and understand English technical documents, and communicate in English via email
    ‒ Spoken English communication skills are a plus.

Why Join Us:
At Fortinet, we embrace diversity and inclusivity. We encourage applications from diverse backgrounds and identities. Explore our welcoming work environment designed for a rewarding career journey with an attractive Total Rewards package to support you with your overall health and financial well-being. Join us in bringing solutions that make a meaningful and lasting impact to our 660,000+ customers around the globe.


We will only notify shortlisted candidates.

Fortinet will not entertain any unsolicited resumes, please refrain from sending them to any Fortinet employees or Fortinet email aliases. Should any Agency submit any resumes to Fortinet, these resumes if considered, will be assumed to have been given by the Agency free of any related fees/charges.


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Join Fortinet, a cybersecurity pioneer with over two decades of excellence, as we continue to shape the future of cybersecurity and redefine the intersection of networking and security. At Fortinet, our mission is to safeguard people, devices, and data everywhere. We are currently seeking a dynamic Software Development Engineer to contribute to the success of our rapidly growing business.