Weekend Software Developer Jobs in York, SC (NOW HIRING)

Come join us at Terrestrial Energy, a US developer of advanced, Generation IV nuclear reactors. We are growing our workforce to develop and deploy our Integral Molten Salt Reactor (IMSR) small modular nuclear plant to provide cost-competitive, clean firm heat and power to industry.

The Company has recently completed a merger creating a publicly listed operating company (NASDAQ "IMSR"), to secure the capital resources for our next growth phase. With the current alignment of US Federal and State government, as well as industry interest in Small Modular Reactor (SMR) and advanced reactor technologies such as Terrestrial Energy's IMSR, there is today a unique and compelling opportunity to participate in the execution of the company's growth business plan.

The Company is building a team of high-performing business professionals and leaders in engineering, R&D, product management and business development areas at our Charlotte, North Carolina headquarters and future project sites. We are looking for talented individuals who can help build the organization, processes, and goal-orientated corporate culture to lead the company in our expansion. We are seeking people who:

• Have US market experience and perspectives bringing good judgement and innovative approaches to problem solving and business plan execution.
• Have demonstrated exceptional performance in past engineering projects.
• Offer exceptional leadership and team building capabilities.
• Have a deep understanding of the requirements for advanced reactor development.
• Can assist in the creation of the discipline and organized company structure, and contribute to a culture of excellence, necessary for the development and deployment of the Company's IMSR plant.
• Can thrive in a fast growing and opportunity business environment, and are capable of flexibility and adaptability at a time of organizational change.
• Have the specific skillset and experience for the following role:

The Software Developer, under the direction of the Digital Engineering Manager, is primarily responsible for designing and delivering full-stack solutions that integrate applications, streamline data flow, and improve the performance, reliability, and efficiency of the organization's technology stack.

Other Responsibilities Include:

• Design, build, and maintain internal applications and services across the full stack - database, backend APIs, and user-facing frontends - for forecasting and planning tools, simulation orchestration, dashboards, and integration layers.
• Build integrations between commercial engineering tools (PLM, MBSE, SPDM, schedule, ERP) and internal applications via their APIs and data formats.
• Productionize models in collaboration with Data Science, taking notebook-stage analyses to maintained services with appropriate testing, monitoring, and documentation.
• Own features end to end, from schema and API design through frontend implementation, deployment, and post-release support.
• Apply software engineering rigour appropriate for a regulated environment, including version control, code review, automated testing, configuration management, traceability, and software V&V practices.
• Collaborate with DevOps and Engineering IT on deployment, environments, and infrastructure for engineering tooling.
• Contribute to architectural decisions as the Digital Engineering tool portfolio grows.

Core Competencies

• Full-stack development across database, backend, and frontend layers
• Python and TypeScript, C#, or Java; React, Vue, or similar frameworks
• Software engineering best practices: testing, Git, CI/CD, APIs, and relational databases
• Cross-functional technical communication: Experience working in an Agile environment

Requirements

• Bachelor's degree in computer science, software engineering, or a related technical field, or equivalent demonstrated experience.
• 2 or more years of experience building and maintaining production-quality internal tools or services that real users depend on.
• Demonstrated full-stack delivery experience shipping applications that span database, backend, and frontend.

Assets

• Experience in nuclear, aerospace, defence, medical devices, or another regulated software environment, including familiarity with software V&V or safety-related software standards.
• Familiarity with MBSE, PLM, or SPDM tools or their APIs (Teamcenter, 3DEXPERIENCE, Cameo, ModelCenter, or similar).
• Experience integrating with or orchestrating scientific or simulation codes.
• Cloud and containerization experience (AWS or Azure, Docker, Kubernetes).
• Experience with data visualization libraries such as D3, Plotly, or Recharts for engineering and analytical dashboards.

Benefits

• Extended Healthcare Plan
• A vacation policy designed to support your work-life balance
• EAP Programs available to you and your family
• Wellness Subsidy
• Annual Performance Review
• Paid Volunteer Days - A chance to give back!
• Career development opportunities

Please submit a Resume andCover Letter.

Candidates must be legally authorized to work in the US without the need for sponsorship for employment visa status.

Terrestrial Energy requires that the successful candidate be able to access and use information subject to U.S. Export Control Laws, which mandate all citizenships (including dual citizenships) be from the U.S. Department of Energy's List of Generally Authorized Countries (10 CFR Part 810 Appendix A and can be found here:

https://www.ecfr.gov/current/title-10/chapter-III/part-810/appendix-Appendix%20A%20to%20Part%20810) unless a specific authorization from the U.S. Department of Energy is obtained or unless you are a U.S. citizen, U.S. national, U.S. permanent resident, or protected individual under the U.S. Immigration and Naturalization Act (8 U.S.C. 1324b(a)(3)). Additional information can be found here: https://www.energy.gov/nnsa/10-cfr-part-810.

Terrestrial Energy Inc. is an equal opportunity employer and does not discriminate on the basis of any legally protected status or group. We encourage applications from all qualified individuals.

If you require accommodation during the application or interview process, please advise us as soon as possible so appropriate arrangements can be made. If you require technical support in a format that is accessible to you, please contact Accessibility@terrestrialenergy.com