Develop distributed backend systems, APIs, and services for data acquisition, access, and processing. Write maintainable Golang services and a Python client library, optimize ingestion and retrieval performance, and collaborate with physicists and engineers to translate requirements into software. The role supports simulation and experimental data analysis in a fusion-energy environment and may involve safety-sensitive work, occasional travel, nights, weekends, or on-call coverage.
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.
Join the power movement as a Senior Data and Operations Software Engineer
The Software Engineering team is seeking an experienced and motivated backend software engineer to become a member of the Data and Operations Software group. The group is responsible for the company’s data services and as a backend software engineer you will play a crucial role in developing the APIs and distributed systems that facilitate data acquisition, access, and processing capabilities within the company. You will work closely with physicists and other software engineers to create robust and high-performance data systems tailored to the unique needs of our groundbreaking work in the field of fusion energy.
What you'll do:
- Develop the distributed systems and services that provide data acquisition, access, and processing capabilities within the company
- Write clean, maintainable, and efficient code in Golang
- Write a user-friendly Python client library
- Collaborate with physicists, diagnosticians, and other engineers to gather user stories and translate the resulting requirements into code
- Optimize backend performance to improve data ingestion, retrieval, and processing times
- Help make fusion energy a reality by making it possible to collect, retrieve, and analyze data from simulations and experiments
What we’re looking for:
- Bachelor's degree in a relevant engineering field (computer science, computer engineering, electrical engineering, industrial engineering, etc.)
- 7+ years relevant experience
- Proven experience as a backend software engineer working on distributed systems and REST APIs
- Strong problem-solving skills and attention to detail
- Excellent communication and teamwork skills
- Ability to work in a fast-paced, collaborative, and innovative environment
- Proficiency with python
- Proficiency with Golang or similar language that is suitable for web services
- Familiarity with Linux and development tools such as Git, GitHub, and Docker
Bonus points for:
- Experience in developing software for mission-critical applications
- Experience with real-time data collection and visualization
- Experience with very large volume data collection
- Some familiarity with front-end frameworks such as React
Must-have Requirements:
- 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.
Commonwealth Fusion Systems Cambridge, Massachusetts, USA Office
148 Sidney Street,, Cambridge, MA, United States, 02139
Similar Jobs
Artificial Intelligence • Cloud • Security • Software • Cybersecurity
Software Engineering Interns contribute to Datadog’s observability and security platform by building and improving backend, frontend, infrastructure, data engineering, and developer tooling systems. Responsibilities include developing distributed and cloud-native services, addressing performance and scalability challenges, delivering technical projects from design through deployment, and collaborating with experienced engineers and mentors.
Top Skills:
Ai Coding ToolsCloud-Native InfrastructureDistributed SystemsKubernetes
Cloud • Computer Vision • Information Technology • Sales • Security • Cybersecurity
Manage an engineering team building reusable infrastructure platforms and core distributed systems. Architect highly available services, review designs, plan roadmaps, optimize cloud costs, and enforce deployment standards across AWS and GCP. Lead planning, retrospectives, on-call practices, and reliability initiatives involving SRE, CI/CD, chaos engineering, and incident analysis. Develop engineering strategy, mentor senior engineers, and influence platform decisions across product teams.
Top Skills:
AIAnsibleAWSChaos EngineeringChefCi/CdDevOpsGCPGitopsGoLinuxPulumiPuppetPythonSaltSreTddTemporalTerraform
Cloud • Computer Vision • Information Technology • Sales • Security • Cybersecurity
Architects, deploys, and operates CrowdStrike’s data platform infrastructure and services. Responsibilities include administering Airflow and Superset, managing Terraform infrastructure, building CI/CD pipelines, implementing security and access controls, developing DBT data models, cataloging assets in OpenMetadata, writing Python automation, and mentoring engineers. The role requires cloud, container orchestration, SQL, data modeling, compliance, and AI technology expertise, along with eligibility for CJIS clearance.
Top Skills:
AIApache AirflowApache SupersetAWSAzureCi/CdDbtDockerGCPIamKubernetesMachine Learning PipelinesOciOpenmetadataPythonSQLTerraform
What you need to know about the Boston Tech Scene
Boston is a powerhouse for technology innovation thanks to world-class research universities like MIT and Harvard and a robust pipeline of venture capital investment. Host to the first telephone call and one of the first general-purpose computers ever put into use, Boston is now a hub for biotechnology, robotics and artificial intelligence — though it’s also home to several B2B software giants. So it’s no surprise that the city consistently ranks among the greatest startup ecosystems in the world.
Key Facts About Boston Tech
- Number of Tech Workers: 269,000; 9.4% of overall workforce (2024 CompTIA survey)
- Major Tech Employers: Thermo Fisher Scientific, Toast, Klaviyo, HubSpot, DraftKings
- Key Industries: Artificial intelligence, biotechnology, robotics, software, aerospace
- Funding Landscape: $15.7 billion in venture capital funding in 2024 (Pitchbook)
- Notable Investors: Summit Partners, Volition Capital, Bain Capital Ventures, MassVentures, Highland Capital Partners
- Research Centers and Universities: MIT, Harvard University, Boston College, Tufts University, Boston University, Northeastern University, Smithsonian Astrophysical Observatory, National Bureau of Economic Research, Broad Institute, Lowell Center for Space Science & Technology, National Emerging Infectious Diseases Laboratories
