Digital Modem Engineer

Job Title

Digital Modem Engineer

Role Summary

Lead design and development of custom, low-latency modem architectures for point-to-point wireless links. Work within the wireless team in Trading Infrastructure to develop physical-layer algorithms, build floating- and fixed-point models, and enable RTL implementation.

Experience Level

Mid-level — requires at least 5+ years of experience in digital modem system design and deployment.

Responsibilities

Primary responsibilities include algorithm design, modeling, verification, and collaboration with implementation teams to deliver low-latency modem systems.

• Lead design, simulation, and realization of physical-layer wireless communication algorithms for low-latency point-to-point links.
• Develop modem and system models (floating-point and fixed-point) and run link-level simulations to evaluate performance and support sign-off.
• Analyze and optimize symbol-rate throughput, latency, and spectral occupancy.
• Design and evaluate pulse-shaping filters, carrier/symbol clock offset tracking/recovery, and adaptive equalization methods.
• Perform channel modeling, fixed-point analysis, and performance investigations that guide RTL development.
• Collaborate with digital designers and firmware engineers to deliver power- and area-efficient implementations.
• Support deployment, debugging, and performance verification of modem links in operational environments.
• Document designs, simulation results, and test procedures.

Requirements

Key qualifications and preferred skills.

• Must-have: 5+ years experience designing, building, and deploying digital modem systems.
• Demonstrated expertise in transmit/receive pulse-shaping filters; carrier/symbol clock offset tracking and recovery; and adaptive equalization (blind, training-based, decision-directed).
• Experience with channel modeling, link-level simulation, and fixed-point design and analysis.
• Proficiency with Python, C/C++, and/or MATLAB for algorithm development, modeling, and simulation.
• Reliable and predictable availability.
• Nice-to-have: experience implementing modem logic on FPGAs or ASICs; familiarity with RF/microwave components and PCB layout.

Education Requirements

MS or PhD in Electrical/Computer Engineering, Computer Science, or a related technical field; or equivalent practical experience is acceptable.

About the Company

Company: Jump Trading

Headquarters: Sydney, Australia

Jump Trading Group is dedicated to world-class research, harnessing exceptional talents in Mathematics, Physics, and Computer Science to push scientific boundaries in global financial markets. With a unique culture of innovation that promotes fearlessness, creativity, and collaboration, Jump Trading designs and deploys technologies that drive financial success while partnering with leading research organizations and universities. The company's Engineering team is focused on architecting and maintaining its state-of-the-art trading infrastructure.