Senior Software Engineer I

CoreWeave; Sunnyvale (CA); On-site; USD 150,000 - 190,000; Full time

Job summary

CoreWeave is hiring for an Applications Engineer within the Data Infrastructure group to build and operate full-stack applications in UNION. You will own features from UI to data model, and run services in production using a modern stack (TypeScript, React, Next.js, Python, Kubernetes, Postgres).

A strong emphasis on AI-facing interfaces and evaluation is expected. You will collaborate with engineering, finance, supply chain, and data center teams to shape software that powers decision-making at

Qualifications

• 5+ years building and operating production software, backend and frontend.
• Strong Python and TypeScript, with React/Next.js or similar framework.
• Experience designing and running HTTP APIs with retries and proper error handling.
• Strong SQL and relational data modeling, including live schema changes.
• Experience shipping LLM-backed features to production and evaluation.
• Hands-on with containers and deployment tooling (Docker, Helm, Kubernetes).
• Experience wiring apps to data platforms and analytical databases (Spark, Kafka, StarRocks, Snowflake).
• CI/CD, automated testing, observability, on-call for owned software.
• Experience collaborating with non-engineers to ship adopted software.

Responsibilities

• Build full-stack applications and features in UNION, and own production delivery.
• Own the interface down to the data model; ensure reliability and maintainability.
• Work across teams including engineering, finance, supply chain, and data center ops.
• Define product scope with stakeholders and own it from concept to production.

Skills

Python

TypeScript

React/Next.js

APIs design

SQL modeling

LLM features

Docker/Kubernetes

Data platforms

CI/CD

Observability

Cross-functional collaboration

Tools

Spark

Kafka

StarRocks

Snowflake

Job description

CoreWeave is The Essential Cloud for AI™. Built for pioneers by pioneers, CoreWeave delivers a platform of technology, tools, and teams that enables innovators to build and scale AI with confidence. Trusted by leading AI labs, startups, and global enterprises, CoreWeave combines superior infrastructure performance with deep technical expertise to accelerate breakthroughs and turn compute into capability. Founded in 2017, CoreWeave became a publicly traded company (Nasdaq: CRWV) in March 2025. Learn more at www.coreweave.com.

What You’ll Do

Applications Engineering, part of CoreWeave’s Data Infrastructure organization, builds the software CoreWeave uses to plan and operate its own infrastructure business. Some of that is UNION, our data platform, where anyone in the company can query the lakehouse in plain language and stand up their own dashboards, applications, and agents. The rest is the applications behind decisions like which data centers get which hardware and when, for a company adding gigawatts of capacity a year. Engineering, finance, supply chain, and data center operations all depend on what we ship.

About The Role

You will build full-stack applications, and features in UNION itself, and own all of it in production, from the interface down to the data model. Our stack is TypeScript with React and Next.js, Python services running on Kubernetes, and Postgres alongside the lakehouse. We care more that you have built and run this kind of software than which frameworks you built it in. A good share of the work is AI-facing, meaning natural language interfaces and agents that operate on governed data, plus the evaluation work that tells you whether they are any good. Owning a product area here means you sit with the people who run the process and work out with them what the software should do. You are also the one who answers for it when it breaks. Most of these processes have never been written down anywhere, so a fair amount of the job is working out what to build before you build it.

Who You Are

• 5+ years building and operating production software, including both backend services and modern web frontends
• Strong Python and TypeScript, with real experience in React, Next.js, or a comparable modern framework
• Experience designing and running HTTP APIs that other services depend on, including timeouts, retries, and keeping writes correct when a call fails partway through
• Strong SQL and relational data modeling, including schemas you had to change after they were already live
• Experience shipping LLM-backed features to production, including how you measured whether their output was correct
• Hands-on experience with containers and deployment tooling such as Docker, Helm, and Kubernetes, and with operating your own services
• Experience wiring applications up to data platforms and analytical databases such as Spark, Kafka, StarRocks, or Snowflake
• CI/CD, automated testing, observability, and on-call for the software you own
• Experience working directly with non-engineers on problems nobody had specified yet, and shipping software they adopted

Preferred

• Experience building AI-native applications such as text-to-SQL interfaces, copilots, agents, or automated insight generation
• Experience with agent frameworks such as LangGraph, and with the tracing and evaluation tooling around them
• Experience designing and running distributed systems in cloud-native environments such as Kubernetes
• Familiarity with open table formats such as Iceberg, Delta, or Hudi, and with query engines such as StarRocks, Snowflake, or BigQuery
• Experience building internal platforms or tools that other teams used to answer their own questions
• Background in an operationally heavy domain such as capacity planning, supply chain, or finance

Wondering if you’re 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 aren't a 100% skill or experience match. Here are a few qualities we’ve found compatible with our team. If some of this describes you, we’d love to talk.

• You want the people using your software to be people you know by name, and you take it personally when it gets in their way
• You want a product area that is yours to own end to end, from the first conversation with a user to the thing running in production
• You work well at speed. Priorities here move with the business, and the problems worth solving tend to arrive on short notice
• You want to know whether the AI in your product is any good, and you will build the evals to find out
• You stand behind what you ship, whether you wrote it or a model helped you write it

Why CoreWeave?

About

At CoreWeave, we work hard, have fun, and move fast! We’re in an exciting stage of hyper-growth that you will not want to miss out on. We’re not afraid of a little chaos, and we’re 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 Best-in-Class Client Experiences
• Achieve More Together

We support and encourage an entrepreneurial outlook and independent thinking. We foster an environment that encourages collaboration and provides the opportunity to develop innovative solutions to complex problems. As we get set for take off, the growth opportunities within the organization 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!

California Applicants

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Equal Opportunity & Accommodations

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.

As part of this commitment and consistent with the Americans with Disabilities Act (ADA), CoreWeave will ensure that qualified applicants and candidates with disabilities are provided reasonable accommodations for the hiring process, unless such accommodation would cause an undue hardship. If reasonable accommodation is needed, please contact: [e-mail].

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.

• 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.