Senior TT&C Engineer

Senior TT&C Engineer

ReOrbit

Helsinki, Finland

ReOrbit is looking for a Senior TT&C Engineer to take full ownership of the RF/PHY Telemetry, Tracking & Command (TT&C) subsystem across our next generation satellite platforms. You will design, analyze, validate and de-risk the full TT&C chain, ensuring robust spacecraft ground communication with well understood margins and no late surprises. This is a hands-on builder role focused on real hardware, real signals, and full-system responsibility from design through preflight validation.

Responsibilities

• Own end to end TT&C RF/PHY subsystem from requirements through validation;
• Define RF architecture, perform trade studies and drive key design decisions;
• Develop, analyze, and defend link budgets, margins, and performance models;
• Define and validate interfaces between spacecraft, payload, and ground systems;
• Model and simulate RF and communication system performance;
• Implement and analyze CCSDS TM/TC at PHY and link layers;
• Work with DVB-S2/S2X and/or custom/proprietary waveforms;
• Address security and encryption considerations at PHY/link layer;
• Execute hands on RF testing using lab equipment (VNAs, spectrum analyzers, signal generators);
• Perform hardware in the loop (HIL) and system level TT&C validation;
• Own pre flight validation, tuning, and de-risking of the full TT&C chain;
• Collaborate closely with payload hardware, avionics, flight software, ground segment and AIT teams;
• Ensure clean RF verification campaigns with no late stage surprises.

Skills and Requirements

• 5+ years of experience in space, satcom, or deep tech RF engineering;
• Prior spaceflight experience supporting at least one real mission;
• Strong hands-on expertise in RF system design, analysis and validation;
• Proven experience building and validating link budgets;
• Deep understanding of RF lab testing and measurement techniques;
• Strong knowledge of CCSDS standards (TM/TC, coding, space link protocols);
• Familiarity with ECSS standards across communications and verification;
• Experience with DVB-S2/S2X and/or custom PHY waveforms;
• Exposure to security and encryption at PHY or link layer;
• Ability to work across design, simulation, lab testing, and system integration;
• Solid awareness of low level software (C/C++, FPGA interfaces, drivers);
• Experience with RF simulation tools (ADS, CST, HFSS, MATLAB);
• Proficiency in MATLAB or Python for communication system analysis;
• Hands-on experience with RF test equipment;
• Comfortable working in integrated hardware/software environments.