Senior Digital Twin Software Engineer

ReOrbit; Helsinki; On-site; EUR 90,000 - 130,000; Full time

Benefits offered by this job

Lunch vouchers

Events & parties

Occupational health care

Relocation support

Health insurance

Job summary

ReOrbit in Helsinki is seeking a Senior Digital Twin Software Engineer to advance simulation and real-time control for UKKO, SILTA and future missions. You will co-design networked digital twin systems, build telemetry and messaging layers, and help shape architecture.

We value strong C++ expertise, experience with high-fidelity simulations, and hardware-in-the-loop integration. Join a fast-growing space-tech startup focused on secure, software-first satellite platforms.

Qualifications

• BS/MS in Physics, CS, or Software Engineering required.
• 4+ years in simulation software development with architecture, code review, CI/CD, testing and V&V.
• Strong object-oriented C++ for simulators.
• Experience integrating hardware and software in the loop.
• Experience developing high-fidelity, high-frequency real-time software.
• Self-motivated with ability to drive independent projects.

Responsibilities

• Co-design and implement networked digital twin software systems.
• Build telemetry, messaging, and networking layers.
• Develop simulation and system-control components.
• Implement distributed and real-time system components.
• Co-own technical architecture and platform direction.
• Rapidly prototype, iterate, and ship features.
• Write clean, production-oriented code.

Skills

C++ for simulators

Simulation software development

CI/CD pipelines

System architecture

Real-time software

Hardware-in-the-loop

Education

Bachelor's or Master's degree in Physics, CS, Software Engineering

Job description

ReOrbit is looking for a Senior Digital Twin Software Engineer to join the ReOrbit team and support the software campaigns for our current satellite product lines UKKO, SILTA and future missions. 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

• Co-design and implement networked digital twin software systems.
• Build telemetry, messaging, networking layers.
• Develop simulation and system-control components.
• Implement distributed and real-time system components.
• Co-own technical architecture and platform direction.
• Rapidly prototype, iterate, and ship features.
• Write clean, testable, production-oriented code.

Skills And Requirements

• Bachelors or Masters degree in Physics, Computer Science, Sofware Engineering or similar.
• Strong (4+ yrs) experience in simulation sofware development including system architecture, code review, CI/CD pipelines, software testing and V&V.
• Strong capability in object-oriented C++ for developing simulators.
• Knowledge of integrating hardware and software in the loop.
• Experience developing high fidelity, high frequency, real-time software solutions.
• Self-motivated and driven, with a proven ability to develop and analyse independent projects.

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‑note 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.

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, find some experiences about relocation here.

The Company may require a security clearance for certain positions. Any such security clearance will be conducted in accordance with applicable law and the Company's relevant policies

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.