Sr. Software Engineer

Regular, Full time Mississauga, Ontario / Hybrid

 Are you interested in helping to secure and enable reliable operations of a nation’s critical infrastructure? Phoenix Contact Network Communications Inc. (doing business as iS5 Communications Inc.), develops products and solutions that do just that. Utilizing the company’s designed secure networking and edge computing platform for Industry 4.0 and Industrial IoT applications, the Company is developing innovative cybersecurity, industrial communications, big data, and AI/machine learning solutions for Smart Grids, Intelligent Transportation Systems, and other critical infrastructure industries. Our Company is looking for individuals to help build the next generation solutions for our global customer base at our office in Mississauga, Ontario. 


As a Sr. Software Engineer, you will be part of an exciting engineering team in our rapidly growing business. As a member of the Software Engineer team, you will have an important role in supporting the design, release and launch of communication products which are aligned with industry standards and project product profile. The primary responsibilities of the role will be but not limited to:

  • Responsible for embedded Linux software architecture and implementation.
  • Developing C/C++ software according to the company SDLC process. 
  • Responsible for unit tests, system integration, product validation and certification. 
  • Managing outside developers and consultants. 
  • Managing software release and bug tracking system. 
  • Writing design documentation and status reports. 


  • 10 + years of experience in developing real-time embedded and/or application software on Linux based platform. 
  • In-depth knowledge of Ethernet switching, routing and application-level protocols (L2/L3 protocols) – RSTP, LLDP, STP, IGMP, VRRP, RIP, OSPF, TCP/IP, HTTP, NAT, IGMP, QoS, VLAN, VPN etc. 
  • Experience with UNIX/POSIX programming interface.
  • Solid understanding of data and telecommunication networks and protocols. 
  • Experience developing any of the following is a plus: Firewall, VPN, IDS/IPS, SDN. 
  • Knowledge of cryptographic protocols & standards. 
  • Experience in developing security, encryption and tunnelling protocols.
  • Experience with embedded Linux, Hypervisor, Deep Packet Inspection, DPDK is an asset. 
  • Experience developing in VM, or container platforms and technologies is an asset. 
  • Knowledge of SCADA communications protocols like DNP, Modbus etc. is an asset. 
  • To fit in our growing and diverse team, you must be:
    • Strong analytical and problem-solving skills
    • Have excellent communication skills both written and spoken
    • Proactive and energetic, creative and a self-starter
    • Team-oriented and collaborator, committed to the organization and its vision.

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what our clients say

Thank you again for working with us to enable this functionality on a one‐off situation. Your willingness to develop a new version of the iDMS software just to support us is greatly appreciated and shows that iS5Com is willing and able to go above and beyond the status quo. Please extend our appreciated thanks to all of your team who assisted in this development.

Travis Phifer, Projects Manager

It was our pleasure to meet with you guys and get excellent information on your company and capabilities! I feel really confident that we'll have an excellent working relationship as we strive to use your products as our standard offering.

Patrick Avery, General Manager, Automation

We, NASMA TELECOMMUNICATIONS LLC, Oman, have installed various models of iS5 Communications Inc. networking devices in our projects and are pleased with their performance and interoperability.

Naresh Pai, Regional Head, Telecom & Security

We had a chance to test the updated switches this morning. It’s a night and day difference. Performance is much better. We’re ready to head out to the field.

Andrew Spurgeon, Manager, Product Management

iS5 provides a solid, hardened product that meets my utilities needs for a very competitive price. Features such as 1000BaseT Ethernet, fiber optic uplink options, POE, secure protocols for administration, standards-based management and solid user interface provide excellent value for the money. So far, all the units have been working perfectly with no issues, some of them have been in place for over a year.

Rett D. Walters, Manager of Information Technology

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