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

• 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

What does ReOrbit do?

ReOrbit builds the foundation for the next generation of space applications by transforming satellites into truly intelligent, interconnected platforms, defined by software. Our satellite design philosophy revolves around the idea that satellites must network, communicate with each other and thus improve mission efficiency. How can this be achieved? Thanks to a flexible software-first architecture, where all these aspects are dealt with upfront in the mission concept, as integrated functionalities.

ReOrbit’s top-notch team of software engineers and system architects develop in-house software, procure hardware from the best-in-class suppliers, and seamlessly integrate the components to create flexible and secure satellites. Today, we are a rapidly growing company building a very strong multidisciplinary team to support our activities. We are headquartered in Helsinki, Finland with a subsidiaries in Bristol, UK and Bariloche, Argentina.

Working at ReOrbit

At ReOrbit, we are focused on building a strong team as we believe nothing can be accomplished without innovative, humble and curious minds working together on a common goal. We’re all about fostering an inclusive, dynamic environment where equality and diversity are our strength. 

We offer

• Challenging but rewarding environment – you will thrive if you are always reflecting on how to make things better. Your ideas will be heard.

• Ambitious and supportive network of people, who are motivated to change the space industry, bringing expertise from both classic and new space .

• Benefits such as lunch vouchers, events, parties, occupational health care and additional health insurance - but most importantly a possibility to be a part of a unique and diverse team, connected by similar mindset and sense of humor. 

• We like to spend time together! You can choose activities whichever is to your liking – runOrbit, climbOrbit; become ping pong or board games champion.

• We support relocation and integration into Finnish society.

Join us in our journey of building software enabled satellites for secure communications
and, thus, creating the most compelling in space data flow company of the new space era.

For agencies: We do not accept unsolicited CVs for our open vacancies. Any CV sent to our team unsolicited will reserve us the right to pursue a candidate without obligation to the sender. All candidate submissions must be conducted through our official channels and in accordance with our terms of engagement.