ReOrbit is looking for a Digital Twin Software Engineer to join our team and support the development of distributed digital twin software systems for our current satellite product lines.This is an opportunity to work at the intersection of simulation, real-time software, telemetry, networking and system control. You will help build the software foundations that allow complex satellite systems to be modelled, tested, validated and evolved with speed and confidence.
As our Digital Twin Engineer, you will enjoy solving difficult technical problems, writing clean and reliable code, and working closely with multidisciplinary engineering teams. You do not need to have spent your entire career in the space industry, but you should bring strong software engineering fundamentals, curiosity, and the ability to build robust simulation and real-time software systems.
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.
This job can be based in our headquarter in Helsinki, Finland or Bengaluru, India.
Responsibilities
Implement distributed digital twin software systems.
Build telemetry, messaging and networking layers.
Develop simulation and system-control components.
Support the development of real-time and distributed software components.
Rapidly prototype, iterate and ship features.
Write clean, testable and production-oriented code.
Contribute to software reviews, testing, validation and verification activities.
Work with engineering teams to support hardware-in-the-loop and software-in-the-loop integration.
Help improve development practices across code quality, CI/CD, testing and maintainability.
Skills and requirements
Bachelor’s degree in Physics, Computer Science, Software Engineering or a similar technical discipline.
2+ years’ experience in software development, preferably within simulation, digital twin, embedded, distributed or real-time software environments.
Strong object-oriented C++ capability for developing simulators or complex software systems.
Experience with software engineering best practices, including code review, CI/CD pipelines, software testing and validation and verification.
Knowledge of hardware-in-the-loop and software-in-the-loop integration.
Experience developing real-time software solutions.
Ability to develop, analyse and improve technical projects independently.
Self-motivated, curious and comfortable working in a fast-moving technical environment.
Strong written and spoken English
Experience working on space applications or satellite systems.
Experience developing, delivering or presenting proof-of-concepts, prototypes or demonstrators to internal or external stakeholders.
Knowledge of distributed systems using open standards and protocols.
Exposure to telemetry systems, messaging layers, networking, simulation frameworks or system-control software.
Experience working with multidisciplinary teams across software, systems, hardware, test or operations.
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 inhouse 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 subsidiaries in Bristol, UK, Bariloche, Argentina and Bengaluru, India.
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.

Founded in 2019 and headquartered in Helsinki, Finland, ReOrbit is a fast-growing European space technology company that manufactures sovereign satellites and connected systems for national security.
Our technologies provide independent control of critical space assets and enable secure communications for both military and civilian use. Through long-term partnerships and knowledge transfer, we ensure our customers achieve and maintain strategic autonomy.
With offices across multiple countries, we bring together a diverse team of experts who bring extensive industry experience and technical excellence to our operations. As we continue to expand, we are opening new locations worldwide and are always on the lookout for talented, ambitious individuals to join our journey.