Fullstack Engineer (Frontend focus)

What Youll Do:

The Monolith AI Engineering Team at CoreWeave is responsible for building and scaling the core platform that powers the worlds most advanced engineering simulation and AI workflows our ambition is to become the superintelligent AI test lab for the engineering industry helping customers ship science faster. From evolving distributed architecture to enabling the next generation of agentic interfaces and physical AI this team delivers the performant reliable and scalable foundation trusted by the worlds largest engineering companies.

The Fullstack Engineer (Frontend Focus) will own and evolve the Monolith platforms product surface the dataheavy workflowcentric web experience where engineers design experiments compare runs interact with agents and turn complex physical test data into decisions. Youll partner closely with Design Product and Backend Engineering to ship UI and UX that feel fast intuitive and trustworthy for nonML expert engineers while also contributing to our Python backend services when needed.

About the Role:

Were targeting an IC5 Fullstack Staff Engineer with a strong frontend background and are also open to exceptional Senior Fullstack Engineer II (IC4) candidates who can operate at stafflike scope. The role is heavily frontendweighted (roughly 8090%) focused on owning the Monolith web application: component architecture design system evolution performance and UX for complex datarich workflows. Youll also work across our Python services (FastAPI/Flask) to shape and integrate APIs bring new platform capabilities to the UI and occasionally deliver backend features that unlock better user experiences.

Youll be a key partner in defining how engineers experience Monoliths AI test lab from agent chat to experiment exploration and monitoring and will help set the bar for frontend quality reliability and developer experience across the team.

In this role you will:

Frontend Ownership & Experience

• Own significant areas of the Monolith frontend from architecture and component design to implementation refactors and ongoing maintenance.
• Design and build modern responsive UIs using React and TypeScript with a focus on complex dataheavy views (tables charts experiment timelines dashboards agents) that remain fast and understandable for users.
• Collaborate with Design to evolve our design system and component library ensuring consistency accessibility and a highquality visual language across the product.
• Drive frontend performance improvements (bundle size rendering strategies network usage) to keep the app responsive even under large datasets and longrunning workflows.
• Champion accessibility and usability ensuring the interface works well for timepressed engineers in demanding environments.

Fullstack Development & Platform Integration

• Work closely with backend engineers on our Python services to design clean API contracts shape data models for UI needs and debug issues across the stack.
• Implement and integrate backend functionality (primarily in Python) when it materially improves UX or unlocks new workflows including occasional work on API endpoints background tasks and data transformations.
• Collaborate with our agent and platform teams to expose agentic capabilities (e.g. platform agent) safely and intuitively in the frontend experience.
• Contribute to fullstack observability instrumenting both frontend and backend for metrics logging and tracing and using that data to guide product and performance improvements.

Collaboration Quality & Developer Experience

• Work handinhand with Product and Design to scope projects define success criteria and break down ambiguous problems into iterative deliverables.
• Maintain a high bar for code quality through thoughtful design code reviews tests (unit integration and E2E) and documentation.
• Help improve our frontend developer experience build tooling workflows and patterns that make it easier for the team to ship reliable UI quickly (Storybook/designsystem improvements local dev ergonomics CI checks etc.).
• Mentor other engineers on frontend best practices UX thinking and effective fullstack collaboration.

Who You Are:

Experience & Level

• Typically 7 years of professional software engineering experience including substantial time building and maintaining complex userfacing web applications as a fullstack or frontendleaning engineer.
• A track record of operating at Senior/Staff scope: owning significant product surface area driving crossteam projects and making architectural decisions that last.

Frontend Expertise

• Advanced proficiency in React and TypeScript with experience structuring largescale frontends (modules state management routing datafetching patterns).
• Strong command of web fundamentals
• Experience building dataheavy and visualizationcentric UIs e.g. dashboards charts timeseries visualizations experiment or metrics explorers.
• Familiarity with design systems and component libraries (Storybook or similar) and an eye for when design details materially impact user trust and productivity.

Backend & Platform Skills

• Solid experience with Python in production environments (FastAPI Flask or Django) including building and integrating REST or GraphQL APIs that power frontend experiences.
• Comfortable working in serviceoriented or microservice architectures reasoning about data flows failure modes and performance across boundaries.
• Experience with SQL databases (e.g. PostgreSQL) and practical data modelling for product features.
• Familiarity with modern cloud and container stacks (Docker Kubernetes and at least one major cloud provider).

Quality & Ways of Working

• Strong habits around testing (unit integration and E2E) and CI/CD for frontend and backend changes.
• Effective collaborator with Product Design and crossfunctional stakeholders; clear written and verbal communicator who can explain tradeoffs and constraints.
• Comfortable working in a fastmoving highambiguity environment where we balance shipping quickly with maintaining a reliable platform.

Preferred:

• Experience building UIs for technical or datasavvy users (ML engineers data scientists physical test engineers or similar) especially in B2B SaaS products.
• Familiarity with GraphQL and typed API clients in React (or strong REST plus a desire to pick up GraphQL quickly).
• Experience with SSR/SSG frameworks particularly for performancesensitive dashboards.
• Prior work with timeseries and experiment tracking tooling ML platforms or analytics products.
• Exposure to ML/AI workflows (experiments training runs evaluations agents) and interest in tools for AI engineers as a product domain.
• Experience with frontend observability (Sentry Datadog OpenTelemetry etc.) and using telemetry to guide UX improvements.

Wondering if youre a good fit

We believe in investing in our people and value candidates who can bring their own diversified experiences to our teams even if you arent a 100% skill or experience match. Here are a few qualities weve found compatible with our team. If some of this describes you wed love to talk.

• Productminded craftsperson you care as much about the user experience and clarity of a workflow as you do about the quality of the code behind it.
• Detailoriented on complex UX you enjoy making intricate dataheavy interfaces feel simple and intuitive and youre willing to sweat the small interactions to get there.
• Pragmatic and velocitydriven you know when to build the perfect abstraction and when to ship a wellengineered incremental improvement that moves the product forward.
• Collaborative and empathetic you build strong relationships with engineers designers and PMs and youre comfortable iterating based on feedback from customers and colleagues.
• Owners mindset you feel responsible for the experience endtoend follow through on problems across the stack and care deeply about the impact your work has on customers and the business.

Why CoreWeave

At CoreWeave we work hard have fun and move fast! Were in an exciting stage of hypergrowth that you will not want to miss out on. Were not afraid of a little chaos and were constantly learning. Our team cares deeply about how we build our product and how we work together which is represented through our core values:

• Be Curious at Your Core
• Act Like an Owner
• Empower Employees
• Deliver BestinClass Client Experiences
• Achieve More Together

We support and encourage an entrepreneurial outlook and independent thinking. We foster an environment that encourages collaboration and enables the development of innovative solutions to complex problems. As we get set for takeoff the organizations growth opportunities are constantly expanding. You will be surrounded by some of the best talent in the industry who will want to learn from you too. Come join us!

To fulfil our obligation to protect client data successful applicants offered employment with CoreWeave will be required to complete a basic criminal record check conducted in compliance with GDPR. Employment offers are conditional upon receiving satisfactory check results

What We Offer

In addition to a competitive salary we offer a variety of benefits to support your needs including:

• Family-level Medical Insurance
• Family-level Dental Insurance
• Generous Pension Contribution
• Life Assurance at 4x Salary
• Critical Illness Cover
• Employee Assistance Programme
• Tuition Reimbursement
• Work culture focused on innovative disruption

Benefits may vary by location.

Our Workplace

While we prioritize a hybrid work environment remote work may be considered for candidates located more than 30 miles from an office based on role requirements for specialized skill sets. New hires will be invited to attend onboarding at one of our hubs within their first month. Teams also gather quarterly to support collaboration

CoreWeave is an equal opportunity employer committed to fostering an inclusive and supportive workplace. All qualified applicants and candidates will receive consideration for employment without regard to race color religion sex disability age sexual orientation gender identity national origin veteran status or genetic information.

CoreWeave does not accept speculative CVs. Any unsolicited CVs received will be treated as the property of CoreWeave and your Terms & Conditions associated with the use of CVs will be considered null and void.

Any unsolicited CVs sent by your company to us that is to say in any situation where we have not directly engaged your company in writing to supply candidates for a specific vacancy will be considered by us to be a free gift leaving us liable for no fees whatsoever should we choose to contact the candidate directly and engage the candidates services and will in no way establish any prior claim by your company to representation of that candidate should the candidates details also be submitted by any other party.

Export Control Compliance

This position requires access to export controlled information. To conform to U.S. Government export regulations applicable to that information applicant must either be (A) a U.S. person defined as a (i) U.S. citizen or national (ii) U.S. lawful permanent resident (green card holder) (iii) refugee under 8 U.S.C. 1157 or (iv) asylee under 8 U.S.C. 1158 (B) eligible to access the export controlled information without a required export authorization or (C) eligible and reasonably likely to obtain the required export authorization from the applicable U.S. government agency. CoreWeave may for legitimate business reasons decline to pursue any export licensing process.

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