Senior TT&C Engineer - ReOrbit - Remote - Global

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. This is an exciting opportunity to join a fast-growing company and work on next-generation satellite platforms where communication reliability is mission-critical from day one. Responsibilities include owning end to end TT&C RF / PHY subsystem, defining RF architecture, developing link budgets, modeling RF performance, implementing CCSDS TM/TC, working with DVB-S2 / S2X, addressing security, executing RF testing, performing hardware in the loop validation, systemlevel validation, and collaborating with various teams. Requirements include 5+ years in space or RF engineering, prior spaceflight experience, hands-on RF system design expertise, proven link budget validation, deep RF lab testing knowledge, familiarity with CCSDS standards, experience with DVB-S2 / S2X, security considerations, software awareness, RF simulation tools, and RF test equipment experience. ReOrbit builds software-enabled satellites for secure communications, transforming space applications with a software-first architecture. The company is headquartered in Helsinki, Finland, with subsidiaries in Bristol, UK, and Bariloche, Argentina. We foster an inclusive environment and offer a challenging, rewarding workplace with benefits such as lunch vouchers, events, occupational health care, and support for relocation.