Sr. Staff Software Engineer, Digital Modeling
Carlsmed
Position Description
We are seeking a highly skilled and mission-driven Sr. Staff Software Engineer to lead the design and development of digital modeling tools that enable patient-specific spinal surgery planning. This role will focus on creating a 3D digital twin platform that integrates CT-derived anatomy, custom implants, and parametric surgical models.
You will be responsible for building systems that support anatomical manipulation, implant simulation, Boolean geometry operations, region-specific measurement analysis, and 3D data processing pipelines. This position is ideal for someone passionate about computational geometry, surgical simulation, and high-impact medical software.
Key Responsibilities
3D Geometry Processing & Modeling
- Develop tools to manipulate anatomical models derived from CT scans, including segmentation, smoothing, and alignment.
- Implement Boolean operations, implant insertion logic, and model fusion using CAD-level kernels (e.g., OpenCascade).
- Design systems for measuring regional anatomical properties such as vertebral height, curvature, and alignment.
- Create and apply mesh simplification, remeshing, and surface quality improvement strategies.
Parametric Modeling & Implant Simulation
- Build tools that simulate how implant variations affect spinal anatomy and biomechanics.
- Develop parameter-driven models and transformation systems that respond to implant sizing, positioning, and morphology.
- Integrate implant data exported from Onshape or equivalent STEP-based sources.
Visualization & Interaction
- Support development of web-based 3D interfaces using Three.js, Babylon.js, or vtk.js for visualizing anatomy, implants, and surgical plans.
- Collaborate with product and UX teams to build intuitive interfaces for surgical modeling workflows.
Clinical Data Integration & Platform Engineering
- Interface with medical imaging pipelines (e.g., DICOM to STL/STEP) and maintain data integrity across 3D modeling workflows.
- Optimize modeling and Boolean performance for large-scale anatomical datasets in both browser and server-side environments.
Skills
- Deep experience with 3D modeling, geometry processing, or CAD/CAM systems.
- Strong command of JavaScript/TypeScript and Node.js.
- Hands-on experience with OpenCascade (or other CAD kernels), including mesh/B-Rep handling, STEP/IGES import, and surface operations.
- Familiarity with WebAssembly, Emscripten, and JS↔WASM memory management.
- Solid foundation in math for 3D geometry, including transformations, normals, and spatial queries.
- Knowledge of rendering pipelines and WebGL-based visualization (e.g., Three.js, Babylon.js, vtk.js).
- Understanding of DICOM, STL, or segmentation workflows is a strong plus.
Qualifications
- Bachelor's or Master's degree in Computer Science, Biomedical Engineering, Computational Geometry, or a related field.
- Candidates without a formal degree may also be considered with 7+ years of relevant professional experience, including at least 4 years of deep, hands-on work in 3D modeling and CAD/CAM systems.
- Experience with CAD, simulation, or surgical planning platforms.
- Strong communication skills and ability to collaborate with cross-functional teams, including clinical, product, and engineering stakeholders.
- Passion for building impactful tools that advance personalized medicine and surgical care.
Equal Opportunity Employer
Carlsmed is an equal opportunity employer. All applicants will be considered for employment without attention to race, color, religion, sex, sexual orientation, gender identity, national origin, veteran or disability status. Carlsmed is committed to providing reasonable accommodation for candidates with disabilities in our recruitment process. If you need any assistance or accommodation due to a disability, please let us know.
Compensation
We are pleased to provide a competitive salary and benefits. Our benefits reflect our investment in the overall health and well-being of our employees and their families. including paying 100% of monthly healthcare, dental and vision insurance premiums, a 401(k) plan with employer matching, and unlimited PTO. The expected pay range is: $170,000 - $200,000 annually plus a bonus opportunity. Compensation may vary based on related skills, experience, and relevant key attributes.