Senior Algorithms and Simulation Software Engineer

Cfsenergy; Harvard (MA); Hybrid; USD 140,000 - 200,000; Full time

Benefits offered by this job

Restaurant access

Job summary

Commonwealth Fusion Systems seeks a Senior Algorithms and Simulation Software Engineer to design and implement state estimation and control algorithms used in SPARC real-time systems. You will write production-quality code, meet customer requirements, and collaborate across hardware and software testbeds.

A bachelor’s degree in engineering and 7+ years of related experience are required. The role involves building software infrastructure for HITL testbeds, modeling, and validation, plus

Qualifications

• 7+ years of experience in real-time state estimation and control algorithms.
• Bachelor's degree in software or engineering.
• Experience with Python and at least one real-time language.
• Familiarity with Linux and IP/UDP networking.
• Experience with HITL testbeds and model validation.

Responsibilities

• Develop mission-critical state estimation and control algorithms.
• Develop software infrastructure for Hardware-in-the-Loop and software-only testbeds.
• Develop simulation models and infrastructure for real-time and high-fidelity offline simulations.
• Develop offline data analysis tools.
• Define and execute end-to-end test plans to validate SPARC control software.

Skills

Python

C++, Rust

CI/CD

Git

Unit testing

Linux

Education

Bachelor's degree in engineering or related field

Tools

Git version control

CI/CD pipelines

Unit testing frameworks

HITL testbeds

Job description

About Commonwealth Fusion Systems

Commonwealth Fusion Systems is on a mission to deliver the urgent transition to fusion energy. Combining decades of research, top talent, and new technologies, we’re designing and building commercially viable fusion power plants. And we're working with policymakers, suppliers, and many others to build the energy industry of the future. We’re in the best position to make it happen. Since 2018, we’ve raised $4 billion of capital, making us the largest and leading fusion company in the world. Now we’re looking for more thinkers, doers, builders, and makers to join us. People who’ll bring new perspectives, solve tough problems, and thrive as part of a team. If that’s you and this role fits, we want to hear from you.

Senior Algorithms and Simulation Software Engineer

In this role you will be responsible for the design and implementation of state estimation and control algorithms, plus models and simulation frame works necessary to verify those algorithms. Your algorithms will be used in critical real-time applications in the SPARC project, as well as related projects.

As a member of the Software Engineering team, you will be a hands‑on technical contributor. You will be a champion of writing excellent quality, production-ready code for mission‑critical real‑time systems. You will collect functional requirements from customers and produce software solutions to meet these requirements.

You will work with a variety of engineers to integrate your software into software testbeds, hardware testbeds, and the production tools. You will also contribute to the broader software ecosystem to improve tooling and processes used across the company.

• Develop mission-critical state estimation and control algorithms
• Develop software infrastructure to operate Hardware-in-the-Loop (HITL) and software-only testbeds
• Develop simulation models and model infrastructure for both real‑time and off‑line (high fidelity) simulations
• Develop offline data analysis tools
• Help define and execute end‑to‑end and other integrated test cases and test plans to validate SPARC control software
• Bachelor's degree in a relevant engineering field (computer science, computer engineering, electrical engineering, industrial engineering, etc.)
• 7+ years relevant experience
• Professional experience writing real‑time state estimation and control algorithms
• Professional experience writing production quality state estimation and software
• Experience with modern software development lifecycle practices (CI/CD, git version control, unit testing, integration testing, etc)
• Proficiency with python
• Proficiency with at least one real-time control language (c++, rust, etc)
• Experience with Hardware-in-the-Loop testbeds and software-only testbeds for validating control software
• Experience writing models to validate software
• Familiarity with Linux
• Familiarity with general networking (IP/UDP)
• Perform activities such as typing, standing, sitting, etc. for extended periods of time
• Dedication to safety to mitigate industrial hazards that may include heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, high current, pressure systems, and cryogenics
• Willingness to occasionally travel or work required nights/weekends/on-call

#LI-Hybrid

At CFS, we excel in fast‑paced environments, driven by our values of integrity, execution, impact, and self‑critique. As we grow, we’re eager to bring on mission‑driven folks who offer diverse perspectives and fresh ways to tackle challenges.

We value diversity deeply and are proud to be an equal opportunity employer by choice. We consider all qualified applicants equally, regardless of race, color, national origin, ancestry, citizenship status, protected veteran status, religion, physical or mental disability, marital status, sex, sexual orientation, gender identity or expression, age, or any other basis protected by law.

This role requires compliance with U.S. laws concerning the export of controlled or protected technologies or information (collectively, “Export Control Laws”). Any offer of employment will be contingent on the need for compliance with such Export Control Laws.