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Member of Technical Staff, Digital World Engineer

HarkSan JoseComputer Use Agents
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Salary
$170K - $400K USD
Job type
Full-time
Posted
29 Sept 2026
Status
Open · checked 7d ago

About this role

The Member of Technical Staff, Digital World Engineer position at Hark in San Jose is an exciting opportunity for a skilled developer to build foundational agentic reinforcement learning environments. This role suits professionals with strong full-stack and systems engineering expertise who want to shape the future of artificial intelligence hardware and software.

Role Overview

In this capacity, candidates will lead the creation of digital worlds where artificial intelligence agents learn software navigation, complex workflows, and environmental interaction. The work involves designing end-to-end simulations that mimic the complexity of the internet, featuring interconnected websites, apps, and services. Practitioners will collaborate alongside researchers to integrate these digital gyms into reinforcement learning training pipelines.

Key Responsibilities

Design and implement end-to-end agent environments and simulations, incorporating frontend interfaces, backend services, APIs, and data models.
Construct robust agent gym infrastructure covering orchestration, sandboxing, packaging, and benchmarking.
Develop interconnected simulations featuring coherent behavior and shared state across digital artifacts.
Create dynamic environments featuring changing content, background activity, and evolving events.
Collaborate with researchers to incorporate environments into reinforcement learning training and evaluation workflows.
Scale infrastructure to support thousands of concurrent, isolated sandboxed environments with consistent state management.
Optimize startup latency, resource utilization, scheduling, and throughput for efficient reinforcement learning rollouts.
Develop comprehensive debugging, observability, and reproducibility tooling to diagnose runtime failures.

Requirements

Strong full-stack engineering proficiency spanning frontend interfaces, backend services, APIs, and data models.
Hands-on background with stateful backend or distributed architectures, covering databases, concurrency, caching, and failure recovery.
Solid fundamentals in algorithms and computer systems with the ability to profile workloads and validate performance.
Capacity to design clear, reusable abstractions and APIs for researchers and engineers.
Exceptional debugging and testing practices focused on application fidelity, state transitions, and failure prevention.
High degree of ownership, creativity, and autonomy when navigating ambiguous problems.

Nice to Have

Background integrating custom environments with reinforcement learning rollout systems, training pipelines, or evaluation harnesses.
Working knowledge of containers, virtual machines, sandbox runtimes, or distributed workload orchestration.
Familiarity with browser automation, computer-use agents, or event-driven simulation frameworks.

Skills and Tools

Full-stack software development
Stateful backend and distributed systems
API and abstraction design
Sandboxing and container orchestration infrastructure
Performance profiling and debugging

Salary and Benefits

Annual US base salary range of $170,000 to $400,000.
Total compensation may include additional components and benefits depending on the specific offer.

About the Company

Hark develops advanced, proactive, and multimodal artificial intelligence designed to interact through speech, text, vision, and persistent memory. By pairing this intelligence with next-generation hardware, the organization creates a unified universal interface between humans and machines.

How to Apply

Interested candidates should visit the official company careers page to submit an application for this position.

Questions candidates ask

What is the location of this job?

This position is located in San Jose.

What is the salary range for the Member of Technical Staff role?

The annual US base salary range spans from $170,000 to $400,000, varying based on individual factors like experience and knowledge.

What department does this role belong to?

This position belongs to the Computer Use Agents department at Hark.

What are the primary responsibilities of a Digital World Engineer?

Responsibilities include building end-to-end agent simulations, developing agent gym infrastructure, scaling concurrent sandboxed environments, and partnering with researchers for reinforcement learning integration.

What qualifications are considered a bonus for applicants?

Bonus qualifications include experience integrating environments with reinforcement learning pipelines, working with container or sandbox runtimes, and familiarity with browser automation or computer-use agents.

Ready to apply?

The application is on the official Hark careers page.

Apply on company site