Senior Frontend/NodeJS Engineer
Inworld AIAbout Inworld
At Inworld, we believe the processes of building, scaling, and evolving applications are monsters that consume value before it can reach users. Our mission is to solve evolution and transform static software into AI systems that autonomously evolve to better serve their users. We are building an intelligent runtime to conquer these monsters and make this vision a reality.
We are backed by investors such as Lightspeed, Section 32, Kleiner Perkins, Microsoft’s M12 venture fund, BITKRAFT, Founders Fund, and First Spark Ventures. Our technology is used by category leaders, including NVIDIA, Microsoft Xbox, Niantic, Wishroll, Little Umbrella and Streamlabs, among many others. Inworld has been recognized by CB Insights as one of the 100 most promising AI companies globally and has been named one of LinkedIn's Top 10 Startups in the USA
About the role
Inworld is evolving, and we’re looking for an ambitious and capable Senior Frontend/NodeJS Engineer to join us to help drive and actualize this evolution.
To understand what’s changing, please read our recent blog post, A Return to the User. In short, a new platform is emerging right now at Inworld to better serve how AI software actually scales and evolves. For this role, the following aspects are most relevant:
NodeJS is used for an unannounced part of the platform. We can’t say much here yet, but can discuss more details during the hiring process. Note that NodeJS is not used for our current backends. That said, a strong command of Node’s single-threaded, event-driven, non-blocking I/O model is key.
The frontend work entails further developing our React-based web experience at platform.inworld.ai. Right now, only our TTS features are launched, but we’ll be launching more every month. In fact, please sign up for an account, try out the premade TTS voices, or clone your own voice in just a few seconds, and let us know what you think!
As a Senior Frontend/NodeJS Engineer, you would be a significant part of both of these areas. The key challenges are:
Shipping quickly. AI is an intensively competitive area, and we don’t have the luxury of moving even at a “regular” pace.
Developer-focused web experience. Our web experience has to be productive and powerful for AI developers (not typical consumer users), otherwise they won’t be compelled to use it as an integral part of their workflows. This takes listening to customers and iteration as much as just shipping new features out the door. How to do this well is much harder than it seems.
Great features, solid foundations. Beyond just shipping features, our web foundations need ongoing refinement. Whether it’s state, query handling, routing, hooks, auth, test coverage, etc, there is always room to be better at our basics. We need you to drive such improvements while delivering features on time.
Given that this vision was recently announced (June 2025), we are still in an intense building phase. Right now:
Some of these components exist as early versions (functional, but with plenty of room to go deeper)
Others are still to be built. We are launching something new pretty much every month.
This is an IC-focused role. We are looking for someone who loves direct technical contribution.
What you’ll do
Establish prioritized feature scope: Collaborate with the PMs, engineers and leads to determine the biggest product needs to focus on now.
Collaborate, execute, deliver: This is the core of the building loop. We aim to optimize for both speed and quality, despite it being decidedly non-obvious how to manage that tradeoff exceptionally well.
Reflect and drive improvements: Advocate for and realize foundational improvements, even while staying busy with feature work.
Expected experience
Excellent programming skills and experience in JavaScript, TypeScript, and NodeJS
Experience developing complex React apps, using popular libraries such as React Router and React Query
Experience with popular frontend tools and libraries (MUI, Emotion, PostCSS, React Testing Library, Playwright, etc).
Excellent verbal and written communication skills, can collaborate and coordinate with other roles and engineer with ease, trusted and well-regarded teammate
Bonus Qualifications
Experience with Node interop with C++ code via the Node API.
Familiarity with Cursor or other AI-assisted coding tools
Familiarity with turborepo
Experience building AI-centric web apps and familiarity with AI and ML concepts
Candidates must be based in the SF Bay Area or willing to relocate (you will be working on-site in our South Bay office a few days a week).
The US base salary range for this full-time position is $150,000 - $250,000. In addition to base pay, total compensation includes equity and benefits. Within the range, individual pay is determined by work location, level, and additional factors, including competencies, experience, and business needs. The base pay range is subject to change and may be modified in the future.