Sr. Satcom Modem Engineer

About the role

Planet is developing the next generation of small satellite buses, featuring high-resolution optical imaging payloads, a space-based data center connected by optical inter-spatial links (OISLs), and high-speed RF/Microwave communication links. We are seeking an experienced Satcom Modem Engineer to develop and mature our next-generation onboard satcom links, ground radios, and antenna systems.

Responsibilities

• Characterize the SDR link performance of Planet’s next-generation S through Ka-band and optical terminals
• Select vendors and manage subcontractors for Satcom solutions
• Facilitate and conduct rigorous testing on space and ground communication subsystems to ensure flight readiness
• Collaborate with RF, EE, Flight SW, systems engineering, missions, and manufacturing teams

Requirements

• Strong experience with DSP algorithms, digital communication theory, and implementation (including digital modulation, synchronization, error correction, floating-point, and fixed-point design)
• Experience with Software Defined Radios (SDR), specifically GNU Radio and Linux development tools
• Experience defining and measuring radio performance metrics in real time (e.g., SNR, BER, PER, and constellation visualization)
• Experience with state-of-the-art RF System-on-Chip (SoC) implementations

Qualifications

• Bachelor's degree in Electrical/Computer Science or equivalent experience with a focus on digital communications
• MS or Ph.D. in Electrical Engineering with a focus on digital communications
• Expertise in Matlab and Simulink for modem design
• Experience with SDR platforms and associated signal processing libraries (e.g., GNURadio)
• Proficiency in Linux, Python, and data analysis tools
• Experience with optical communications and links for space applications
• Expertise in Radar and/or Phased Array technology

Skills

• Experience with DSP algorithms, digital communication theory, and implementation
• Experience with Software Defined Radios (SDR) and GNU Radio
• Experience with state-of-the-art RF System-on-Chip (SoC) implementations
• Experience with optical communications and links for space applications
• Experience with optical laser communication systems

Benefits

Comprehensive Medical, Dental, and Vision plans
Health Savings Account (HSA) with a company contribution
Generous Paid Time Off in addition to holidays and company-wide days off
16 Weeks of Paid Parental Leave
Wellness Program and Employee Assistance Program (EAP)
Home Office Reimbursement
Monthly Phone and Internet Reimbursement
Tuition Reimbursement and access to LinkedIn Learning
Equity
Commuter Benefits (if local to an office)

Pay

The US base salary range for this full-time position at the commencement of employment is $162,600—$203,200 USD.

Schedule

This is a full-time, hybrid role which will require you to work from our San Francisco office 3 days per week.

Impact

• Own Develop GnuRadio-based ground modem solutions
• Architect, design, and verify space segment software-defined radios and modems
• Lead on-orbit performance validation for end-to-end satellite communications systems
• Lead RF/MW/Optical Communications system integration and testing

Application Deadline

August 1, 2026 at 11:59pm PST

EAR/ITAR Requirements

This position requires access to export-controlled information, and as such, employment (or hiring of a contractor) is contingent upon the candidate’s ability to access all applicable export-controlled information without additional export licensing being required by the Bureau of Industry and Security and/or the Directorate of Defense Trade Controls.

EEO Statement

Planet is committed to building a community where everyone belongs and we invite people from all backgrounds to apply. Planet is an equal opportunity employer, and committed to providing employment opportunities regardless of race, religious creed, color, national origin, ancestry, physical disability, mental disability, medical condition, genetic information, marital status, sex, gender, gender identity, gender expression, pregnancy, childbirth and breastfeeding, age, sexual orientation, military or veteran status, or any other protected classification, in accordance with applicable federal, state, and local laws.