Senior Software Engineer
About The Position
Flexcompute is transforming how the world designs electromagnetic and photonic systems. Tidy3D, our flagship EM simulation platform, is the industry's fastest, most scalable GPU-native solver, empowering companies in semiconductors, photonics, AR/VR, quantum, RF systems, sensors, and advanced computing to simulate complex EM behavior orders of magnitude faster than legacy CPU tools. Our company was founded by world-renowned leaders in simulation technology from Stanford University and MIT. Backed by top VC firms, we are poised to disrupt the billion-dollar engineering simulation industry with our fast-growing trajectory. Role Overview Location: Remote (EU timezone preferred) We are looking for a software engineer to own the shared Python libraries and contracts that our simulation products depend on. You will extract and maintain a stable SDK foundation, design validation and error-handling architecture, and drive adoption across product teams without breaking public APIs. This is not an infra/ops role. You will write Python close to production, define contracts and versioning strategies, and ship libraries that other engineers depend on daily.
Requirements
- 5+ years of professional software engineering experience
- Shipped and maintained shared libraries or SDKs with stable public APIs (SemVer, deprecations, migration guides)
- Strong Python (packaging, architecture, testing, performance)
- Experience with schema/contract systems (JSON Schema, OpenAPI, Protobuf, or similar)
- Can lead ambiguous, cross-cutting work end-to-end
- Clear written communication
Nice To Haves
- Experience with scientific/engineering software (array data, serialization, performance constraints)
- C++ reading/writing ability (solver-adjacent work, not primary language)
- Familiarity with TypeScript (understanding how consumers use generated types)
- Distributed-system boundary concerns (observability, error taxonomies)
Responsibilities
- Extract and ship a minimal shared Python library with stable APIs and clean dependency boundaries
- Design validation architecture: tiered validators, structured error contracts, and domain-separated rules
- Define contract boundaries (JSON Schema, DTOs, versioning) that frontend, backend, and GUI can consume
- Build data model abstractions for simulation results (Zarr storage, lazy loading)
- Create migration paths and coordinate deprecations across product teams
- Partner with Infra/Platform on requirements
Benefits
- Competitive compensation with equity of a fast-growing startup.
- Medical, dental, and vision health insurance.
- 401(k) Contribution.
- Gym allowance.
- Friendly, thoughtful, and intelligent coworkers.
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What This Job Offers
Job Type
Full-time
Career Level
Senior
Education Level
No Education Listed
Number of Employees
51-100 employees
