We are seeking a highly skilled
Systems Programmer (Networking)
to contribute to the development of our industrial communication and networking products. You will have a deep understanding of networking and a proven specialisation in the Modbus protocol.
This role is for a hands-on developer who is passionate about building robust, high-performance industrial communication systems. The ideal candidate will have extensive experience with low-level C programming and a comprehensive knowledge of how to implement and optimise Modbus over the TCP/IP networking stack; as well as a comprehensive understanding of networking concepts and protocols from L2/L3 up to application-level industrial protocols such as MQTT.
Key Responsibilities
Design, develop, and maintain Modbus-based network software and drivers in C.
Implement and extend code using Modbus, MQTT and other communication protocols to meet specific industrial application requirements.
Optimise network performance, latency, and reliability for inter-device communication.
Debug complex networking issues at the packet and protocol level using tools like Wireshark, with a focus on Modbus packet analysis.
Integrate Modbus, MQTT and other communication protocols with various hardware devices and industrial controllers.
Collaborate with cross-functional development teams to ensure seamless connectivity, scalability, and performance across RFI's networkable products.
Contribute to the design of product network architectures, including L2/L3 configuration, VLANs, routing, and protocol selection for industrial environments.
Become a subject matter expert in RFI's range of industrial communication and networking products.
Required Skills and Qualifications
Proven proficiency in C programming, with experience working within electronics product development. Deep and demonstrable knowledge of the Modbus protocol (TCP and RTU), and practical experience working with MQTT libraries.
Strong understanding of the TCP/IP protocol suite, including socket programming.
Knowledge of industrial communication and networking tools, products and standards.
Experience with network analysis and debugging tools (e.g., Wireshark) for diagnosing protocol-specific issues.
Solid knowledge of operating system fundamentals, including processes, threads, and memory management.
Familiarity with network security and product hardening in industrial environments would be highly advantageous.
Strong analytical and problem-solving skills with a meticulous attention to detail.
A determined attitude and desire to succeed are key attributes we will seek in this role.
A determined attitude and desire to succeed are key attributes we will seek in this role. If you have the skills and experience, then we want to hear from you. To find out more about RFI visit us at
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Your application will include the following questions:
Which of the following programming languages are you experienced in?
Which of the following statements best describes your right to work in Australia?
Do you have a Cisco Certified Network Associate (CCNA) Industrial certification?
How many years' experience do you have as a Systems Programmer?
Do you have experience using computerised diagnostic tools?
How much notice are you required to give your current employer?
How many years' experience do you have as a C# Programmer?
How many years' experience do you have as a Network Security Designer?
RFI designs, develops and manufactures high-performance antennas, system components and repeater / rebroadcast systems at our two manufacturing facilities within Australia. Our manufacturing group consists of over 80 professionals and has a proud history since our inception in **** with a focus on delivering niche products to LMR, Public Safety and Carrier markets globally. RFI operates manufacturing sites in Victoria and South Australia, both with a proud history in quality, safety, and environmental performance. Our two sites include Australia's largest antenna manufacturing facility, producing world-class antenna and multicoupling systems for both domestic and international markets and the only Australian manufacturing site producing frequency translating repeater systems. One of the few producing RF power amplifiers and RF distribution equipment and which includes:
A vastly experienced team with rare skills in antenna engineering (design, manufacture and testing), systems engineering (design, testing and installation), active RF and digital electronic engineering (design, manufacture and testing), and software engineering (development and testing for manufacture).
The latest antenna and RF design and drafting modelling packages.
An anechoic chamber with high power and PIM test environments.
An extensive suite of RF and digital test equipment and custom automated test equipment.
Surface mount technology for lead-free printed circuit board (PCB) assembly, complemented by an environmental test facility.
Permanent outdoor antenna test range which also houses our fully shielded RF enclosure.
Source: This is an extract from the company's own website.
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