eSpace · 4 days ago
Senior Software Engineer, 5G Physical Layer
Saratoga, CA
Full-time
Onsite
Senior Level
$150K/yr - $200K/yrE-Space is bridging Earth and space to enable hyper-scaled deployments of Internet of Things (IoT) solutions and services. As a Senior Software Engineer focused on the 5G Physical Layer, you will lead the design, implementation, optimization, and integration of 5G NR PHY software for advanced communication systems.
ArchitectureBig DataMobileOpen SourceSoftwareWeb Development
No H1B
Responsibilities
5G PHY Software Design and Implementation
Design, implement, and optimize 5G NR PHY algorithms on processor-based and heterogeneous SoC platforms
Develop software for key PHY functions such as modulation/demodulation, channel estimation, equalization, synchronization, coding/decoding, and HARQ support
Implement PHY software compliant with 3GPP Rel 15/16/17 specifications
Hardware, RF, and Platform Integration
Integrate 5G PHY software with RF front-end hardware and digital baseband chains
Develop and maintain hardware control software using interfaces such as I2C and SPI
Work with complex SoC architectures, including ARM, DSPs, and hardware accelerators
Develop software interfaces toward embedded accelerators and DSP blocks
Real-Time and Embedded Systems
Design software within strict real-time constraints and low-latency requirements
Develop on embedded Linux, DSP operating systems, and lightweight RTOS such as FreeRTOS and Zephyr
Optimize performance, memory usage, and throughput of PHY software components
Verification, Testing, and Debug
Create and execute PHY-level test cases and validation scenarios
Generate, analyze, and verify PHY test vectors and waveforms
Verify PHY functionality using 5G test equipment (e.g., R&S, Agilent) and commercial UEs
Debug complex PHY, timing, RF, and performance issues across software and hardware boundaries
Technical Leadership and Delivery
Provide effort estimation and technical input for PHY software development tasks
Support customer requests related to 5G PHY features and performance
Document PHY designs, implementations, and results in Confluence or equivalent systems
Collaboration and Ways of Working
Collaborate with RF, systems, hardware, and protocol stack teams to ensure clean PHY-MAC interfaces
Work effectively in a global, distributed team across Europe, India, and the U.S
Follow SCRUM / Agile and Continuous Integration development practices
Operate autonomously while maintaining strong technical communication
Qualification
Required
Master of Science or Master of Engineering degree in Electrical Engineering, Communications Engineering, or equivalent
Significant professional experience as an embedded C and C/C++ software engineer
Strong background in 5G NR PHY and digital communications theory
Experience working with SDR platforms and SoC architectures
Working knowledge of MATLAB and Python for PHY algorithm development and analysis
Strong understanding of real-time embedded software constraints
Excellent problem-solving, time management, and communication skills
Preferred
Deep understanding of 3GPP 5G NR PHY specifications (Rel 15/16/17+)
Experience with Non-Terrestrial Networks (NTN) and satellite communications
Experience implementing PHY algorithms on DSPs and hardware accelerators
Strong understanding of link budgets, channel models, and RF impairments
Experience with waveform generation, PHY simulation, and lab bring-up
Benefits
Health and wellness care options
Financial solutions for the future
Optional legal services (US only)
Paid holidays
Paid time off
Company
eSpace
eSpace is an IT services company that develops tailored enterprise solutions.
Founded in 2000
51-200 employees
Funding
Current Stage
Growth StageTotal Funding
$0M2009-08-01Grant· $0M
Leadership Team
Youssef Aly
CEO and Co-Founder
Hamdy Khalil
CTO
Recent News
2025-06-23
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