Software Engineer, Core Technology

Nex is on a mission to help families rediscover the joy of movement. Created by parents for parents, Nex combines technology and play to deliver fun, social, and interactive experiences powered by natural body motion, encouraging kids and adults to move more, play more, and have fun together. Nex Playground, the company’s award-winning active play system, is purpose-built to get families moving year-round, with safety and privacy as core considerations in its intentional design. It is certified kidSAFE+ COPPA compliant and built to support healthy, active play for all ages and abilities.

Nex Playground features a growing library of 50+ experiences, including motion and dance games, fitness and educational experiences, and Nex Originals. Content includes collaborations with partners like Hasbro, Sesame Workshop, and NBCUniversal. Nex has been recognized by Fast Company’s Most Innovative Companies, TIME’s Best Inventions, and Parents’ Best Entertainment System for Families, and has earned Red Dot, IDEA, and Core77 international design awards. We encourage you to explore Have Fun and Is Motion Gaming Back?, as they offer a deeper look into our culture, values, and explain how our approach to motion gaming differs from previous generations.

Location: Hong Kong / Remote
Type: Full Time

The Role

As a Software Engineer at Nex, you will contribute to building the technical foundations that power our platform's most demanding capabilities. You will focus on either ML Engineering or Framework Engineering, two complementary specializations that drive research velocity and product performance.

In the ML Engineering track, you will build the infrastructure that accelerates machine learning research: training pipelines, data workflows, model integration systems, and the tools that enable rapid experimentation. Your work ensures researchers can iterate reliably and move experiments toward production readiness.

In the Framework Engineering track, you will own the design and development of our cross-platform software framework for detection, sensing, haptics, and ML inference. You will build the real-time systems, hardware abstraction layers, and developer APIs that enable multimodal interaction on Nex Playground.

Either path offers the opportunity to work on deeply technical problems in machine learning systems, data infrastructure, sensing technologies, and real-time inference. You will be part of a small, highly technical team that values both specialization and collaboration, with clear ownership of core technology areas.

The Mindset

You are drawn to solving complex technical challenges at the intersection of research and production engineering. You care deeply about building systems that are reliable, performant, and maintainable. You thrive in environments where technical depth matters, where your expertise in ML systems, distributed computing, or real-time software directly shapes what the platform can do.

What You’ll Do

ML Engineering Track

• Design and build training pipelines, data workflows, and model integration systems

• Develop infrastructure that accelerates research iteration and reduces turnaround time

• Build systems for data collection, curation, and preprocessing at scale

• Create tools and automation that move experiments toward production readiness

• Optimize data pipelines for reliability, performance, and observability

• Collaborate with ML researchers to understand their needs and remove technical blockers

• Work on model serving infrastructure and integration with the production framework

Framework Engineering Track

• Design and develop a robust, performant, cross-platform framework for sensing, detection, haptics, and ML inference

• Build efficient runtime execution systems and hardware abstraction layers

• Develop developer APIs that make complex sensing and inference accessible

• Optimize for real-time performance on multimodal data streams

• Work on camera, microphone, and haptics integration

• Implement code that runs reliably across different platforms and hardware configurations

• Improve framework stability, performance, and developer experience

Both Tracks

• Write clean, well-tested code that maintains high engineering standards

• Participate in code reviews and help raise the engineering bar across the team

• Contribute to shared tools, infrastructure, and cross-role projects (20% Time)

• Work with the dual-leadership model (Engineering Manager and Tech Lead) to understand priorities and technical direction

• Document systems and decisions to support team knowledge sharing

Must Have

ML Engineering Track

• 3+ years of professional software engineering experience in building production ML systems, training infrastructure, or research platforms

• Proficiency in Python, additional experience with at least one other systems language (C++, C#, Java, Rust, or Go)

• Hands-on experience with PyTorch or TensorFlow in production or research environments

• Experience building or maintaining ML training pipelines or data workflows

• Familiarity with model deployment, inference optimization, or MLOps practices

Framework Engineering Track

• 3+ years of professional software engineering experience in building real-time software frameworks, cross-platform systems, or performance-critical applications

• Proficiency in C++/C#, additional experience with at least one other systems language (C++, C#, Java, Rust, or Go)

• Experience with cross-platform development

• Proven track record with performance optimization, real-time systems, or hardware abstraction layers

• Experience building developer APIs or software frameworks used by other engineers

Nice To Have

For ML Engineering Track

• Experience with distributed training systems or GPU-accelerated computing

• Knowledge of data versioning, experiment tracking, or ML metadata management

• Familiarity with containerization (Docker) and orchestration tools

• Contributions to open-source ML projects or research publications

For Framework Engineering Track

• Experience building real-time systems or low-latency software

• Familiarity with computer vision, signal processing, or embedded systems

• Experience with cross-platform development or hardware abstraction

• Knowledge of performance optimization and profiling

• Experience with sensing technologies (cameras, microphones, or similar)

• Familiarity with CI/CD pipelines and automated testing

For Either Track

• Experience working in small, high-performance technical teams

• Background in startups, high-growth environments, or consumer product companies

• Passion for pushing technical boundaries and deep problem-solving

We Offer

• Competitive compensation package.

• Flexible working hours and vacation policy.

• Product-driven culture that treasures talents and individual growth.

• Front-row seat and hands-on experience with cutting edge technologies in the evolving gaming field

Nex is located in San Jose, California, USA and Hong Kong. Learn more about us at nex.inc/who-we-are.

We encourage applications even if you don’t meet more than 50% of the requirements — we believe that experience comes in many forms!