3D C++ Software Engineer

3D C++ Software Engineer

Department: Research & Development

Employment Type: Full Time

Location: US-North Carolina-Raleigh

Join us in transforming digital orthodontics for over 212,000 doctors and 12.2 million patients worldwide. As a 3D C++ Software Engineer, you will design and develop the core algorithms and systems behind our next‑generation 3D applications, directly enabling innovative orthodontic devices. In this dynamic research and development environment, you will apply advanced C++, 3D computational geometry, and mathematical methods to solve complex problems at scale, working closely with cross‑functional teams including biomechanics, manufacturing, and product engineering.

This role offers the opportunity to contribute from early research through production, shaping the future of 3D orthodontic technology.

• Design and develop C++ implementations of 3D geometry algorithms
  , working directly with triangle meshes and derived geometric representations used in research and production software, including pipelines that translate design intent into manufacturing‑ready representations.
• Apply computational geometry and mesh processing techniques to analyze real‑world requirements, including constraints arising from additive manufacturing processes, evaluating accuracy, robustness, and performance trade‑offs, and implement solutions that behave correctly across edge cases.
• Translate product and technical requirements into clear designs and reliable implementations, selecting appropriate methods and tools.
• Collaborate with clinical, biomechanical, manufacturing, and product partners to translate domain constraints into concrete geometric behavior, validating assumptions through implementation and iteration.
• Deliver high quality, maintainable, and testable code
  , contributing to the ongoing improvement of a large and evolving codebase in a regulated environment.
• Participate in an agile R&D team, supporting feature delivery, issue resolution, and coordinated releases with globally distributed teams.

• BS in mathematics, computer science, engineering, or equivalent degree;
  PhD and master’s degree are preferred, or equivalent years of experience.
• 5+ years of directly related professional experience developing software for technical or scientific applications.
• Strong proficiency in modern C++, including tools such as Git, Visual Studio, Jira, and Confluence.
• Strong foundation in linear algebra, geometry, or numerical methods as applied to 3D problems.
• Ability to clearly describe previous 3D or geometry‑related work, including the problem being solved, the approach taken, and the trade‑offs involved.
• Strong analytical and problem‑solving skills, with the ability to understand, structure, and reason about complex technical problems.
• Experience translating requirements into robust, maintainable implementations within a collaborative development environment.

• Familiarity with software development best practices, including code reviews, testing, and documentation.
• Experience in a research, R&D, or startup‑like environment.
• Working knowledge of common development tools such as Git, Visual Studio, Jira, and Confluence.
• Experience developing or deploying software on Linux.
• Exposure to cloud services (e.g., AWS) or large‑scale workflows.

If provided, base salary or wage rate ranges are the range in which Align reasonably expects to set a candidate’s pay for the posted position. Actual placement depends on the individual skills and experience level of a candidate plus the total compensation and equity across team members. For other locations outside of the primary location, the base salary range will be adjusted geographically.

For Field Sales roles, the salary listed is the base pay only and does not include the applicable incentive compensation plan. A cost of living adjustment may be added to base pay for higher cost areas in the U.S.

Our internship hourly rates are a standard pay determined based on the position and your location, year in school, degree, and experience.

We are pleased to provide a general description of…