Cross-Platform API Engineer (C#/C++)

Unity Enterprise; København; Hybrid; DKK 639,000 - 799,000; Full time

Benefits offered by this job

Comprehensive health insurance

Commuting subsidy

Employee stock ownership

Retirement/pension plans

Generous vacation and personal days

Parental leave support

Office snacks

Mental health programs

Employee resource groups

Training programs

Volunteer matching

Job summary

Unity is seeking an experienced engineer to design unified APIs across platforms, contribute to the codebase, and ensure robust API design with high‑quality C++/C# coding practices. The role emphasizes collaboration across teams, API abstraction for multi‑platform support, and long‑term ownership through thoughtful documentation and refactoring.

You will work on cross‑platform features, potentially including native plugin work, while maintaining a focus on scalable APIs and testable

Qualifications

• Experience in C# and developing Unity-based games and extending the Unity editor.
• Ability to abstract platform requirements into a cohesive API surface.
• Experience with native development on at least one platform (desktop/mobile/console).
• Contributed to cross‑team projects from start to finish.
• Knowledge of writing native plugins for Unity and API design/ asynchronous paradigms.
• Demonstrates long‑term ownership through documentation of decisions and code APIs.

Responsibilities

• Craft unified APIs for features across platforms in a single, testable way.
• Contribute API implementations to the Unity codebase, including unit tests.
• Advocate unification of platform implementations into simple abstractions.
• Deliver a stable product by applying robust API design and high‑quality C# and C++ coding practices.
• Refactor existing code to improve efficiency and maintainability, addressing user feedback.

Skills

C#

Unity

API design

Cross‑platform

Native plugins

Async programming

Code documentation

Job description

Unity is seeking an experienced engineer to design unified APIs across platforms, contribute to the codebase, and ensure robust API design with high‑quality C++/C# coding practices. The role emphasizes collaboration across teams, API abstraction for multi‑platform support, and long‑term ownership through thoughtful documentation and refactoring.

You will work on cross‑platform features, potentially including native plugin work, while maintaining a focus on scalable APIs and testable