Senior Flight Platform Software Engineer

ReOrbit is looking for a Senior Flight Platform Software Engineer to join the ReOrbit team and support the software campaigns for our current satellite product lines UKKO, SILTA and future missions. This role is based in our office in Bristol, UK. It's an exciting chance to join a dynamic start-up, with the opportunity to make a real impact, to reach our goal of pushing the boundaries of space data transfer.

Responsibilities

• Perform the specification, design, implementation, build and verification of Mission Critical Flight Platform Software aligned with ReOrbit’s software‑defined satellite philosophy.
• Perform thorough code reviews and contribute to architectural and design decision‑making of software.
• Contribute and support tool and infrastructure development and the engineering process evolution of the software team.
• Support mentorship of junior engineers, enhancing technical growth and capability within the team.
• Be able to communicate effectively with systems and test teams to troubleshoot defects and accelerate software integration.

Skills and Requirements

• Bachelor's or Master’s degree in Computer Science, Software Engineering, Aerospace Engineering, or equivalent.
• 5+ years of professional experience in embedded systems, distributed systems, or mission‑critical software.
• Strong proficiency in C/C++ for embedded or real‑time software with strong software‑design fundamentals, including data structures, concurrency and debugging.
• Strong core software engineering skills, including system architecture, code reviews, static analysis, CI/CD pipelines, configuration management, and effective observability and logging.
• Solid real‑time systems knowledge—scheduling, interrupts, concurrency, determinism, and efficient design for limited compute and memory.
• Experience with spacecraft software, satellite operations, or aerospace systems.
• Understanding of networking protocols, inter‑process communication, or distributed autonomy.
• Experience with security‑oriented software development for mission‑critical systems.

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.

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 subsidiary in Bariloche, Argentina.

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—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 the society of the country we are moving into.

Please, submit your application as soon as possible—we are excited to hear from you and can’t wait to discover your unique skills and experiences.

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.