Full-Time

Research Evaluations Engineer

Exa Labs

Exa Labs

51-200 employees

AI-driven real-time data search API

Compensation Overview

$180k - $350k/yr

H1B Sponsorship Available

San Francisco, CA, USA

In Person

In-person in San Francisco; visa sponsorship available.

Category
AI & Machine Learning (1)
Required Skills
LLM
Rust
Python
Requirements
  • Have hands-on ML experience (training, finetuning, or evaluating models; bonus if related to embeddings or large language models)
  • Have strong engineering fundamentals and can build reliable systems (Python, Rust, distributed pipelines, GPU/cluster jobs)
  • Enjoy diving into data via building eval sets, inspecting edge cases, designing creative measurement strategies
Responsibilities
  • Design and build Exa's evaluation stack for search under an LLM-enabled regime.
  • Investigate how to evaluate search engines in an LLM world and build the most comprehensive, creative, and effective evaluation suite.
  • Decide the future direction of search through the evaluation metrics and frameworks you choose to optimize for, influencing the research team and company trajectory.
  • Write a manifesto of what perfect search means.
  • Design and implement evaluation frameworks that probe the limits of search.
  • Build scalable, reliable evaluation pipelines that track regressions, drift, and quality signals across billions of documents.
  • Create golden datasets, synthetic benchmarks, agentic tasks, and real-world test suites reflecting how developers, agents, and humans actually use Exa.
  • Partner closely with ML researchers, data engineers, infrastructure engineers, and product teams to shape feedback loops that improve the search models.

Exa Labs builds an AI-driven search engine accessed via an API that returns precise, real-time data from the web. It serves businesses and developers who need high-quality data for training AI models and enhancing applications. The API lets users fetch the best web data with just a few lines of code, enabling easy integration into existing workflows. Unlike traditional keyword-based search, Exa Labs focuses on delivering reliable data at scale to act as a data layer for AI applications. Its goal is to scale the search product and cement its role as the data backbone for AI workloads. The company uses a subscription model with a tier that includes 1000 free searches per month for new users and paid plans for additional queries, and has raised a Series A to fuel growth.

Company Size

51-200

Company Stage

Series C

Total Funding

$362.1M

Headquarters

San Francisco, California

Founded

2021

Your Connections

People at Exa Labs who can refer or advise you

Simplify Jobs

Simplify's Take

What believers are saying

  • More than 5,000 companies already use Exa's search products.
  • Exa Deep expands into financial research, scientific literature, and news monitoring.
  • The Singapore office strengthens Asia-Pacific infrastructure and customer support.

What critics are saying

  • Google's AI-first search can compress Exa's differentiation within eighteen months.
  • OpenAI and other interface-layer players can internalize search and reduce API demand.
  • Rising crawling and infrastructure costs can outpace revenue as Exa scales web coverage.

What makes Exa Labs unique

  • Exa builds an AI-native search API for developers, not ad-driven consumers.
  • It emphasizes real-time semantic retrieval and structured outputs for AI applications.
  • Its web-scale crawling and indexing infrastructure targets harder, broader search problems.

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Benefits

Remote Work Options

401(k) Retirement Plan

401(k) Company Match

Health Insurance

Growth & Insights and Company News

Headcount

6 month growth

0%

1 year growth

-1%

2 year growth

5%
LBank
Jun 14th, 2026
Seoul office begins with crypto focus.

Seoul office begins with crypto focus. Leading operations from the new office will be Park Sung-mo, a16z Crypto's Asia-Pacific go-to-market lead. Park, who was appointed when the firm's Asia expansion plans were announced in December, previously worked at Naver and the Monad Foundation. Park said the firm focuses on helping portfolio companies grow and enter new markets rather than providing capital alone. He added that the Seoul office will actively support portfolio companies seeking opportunities in South Korea and across Asia. The opening adds another step to a16z's increasing activity in technology sectors across the region. In May, Bloomberg reported that a16z led a $250 million funding round for AI search startup Exa Labs, valuing the company at $2.2 billion. Exa develops search infrastructure designed for AI systems and positions its platform as a search engine built specifically for artificial intelligence applications. Interest in financial infrastructure has also remained a priority for the firm. Earlier this month, a16z Crypto invested $100 million as part of a $355 million funding round for Digital Asset Holdings, the company behind Canton Network. Other participants included Citadel Securities, Apollo, BNP Paribas, HSBC, CME Ventures, Coinbase Ventures, Optiver, and the Abu Dhabi Investment Authority. Digital Asset said the funding will support ecosystem growth, partnerships, and acquisitions. The company has promoted Canton Network as a blockchain platform for tokenized assets and institutional finance, with reported support for more than $6 trillion in tokenized issuance. Alongside investments in AI infrastructure and tokenized finance, a16z said it intends to contribute to South Korea's startup ecosystem by creating opportunities between its portfolio companies and local businesses, using Seoul as a gateway for expansion across Asia.

Your Company Name
Mar 31st, 2026
Rephrase single title from this title agoda opens new APAC tech hub in bangkok. And it must return only title i dont want...

Rephrase single title from this title agoda opens new APAC tech hub in bangkok. And it must return only title i dont want... Rephrase single title from this title AI search startup Exa opens first asian office in Singapore. And it must return only title i dont want any extra information or introductory text with title e.g: " Here is a single title:" March 31, 2026 Write an article about Exa has opened its first Asia office in Singapore, the new office will work on web-scale infrastructure for its search systems. in html format .Organize the content with appropriate headings and subheadings ( h2, h3, h4, h5, h6). Include conclusion section and FAQs section with Proper questions and answers at the end. do not include the title. it must return only article i dont want any extra information or introductory text with article e.g: " Here is rewritten article:" or "Here is the rewritten content:" Director of Research - Advertisement - Write an article about After testing since September, the fleet carried more than 1,000 riders and logged over... Write an article about The budget will support cloud and AI infrastructure and ongoing operations over the five-year... Write an article about StashAway sees "strong growth" in Singapore, while Endowus reports "steady inflows" on its platform...

Tech in Asia
Mar 31st, 2026
Exa opens Singapore office to build AI search infrastructure at $700M valuation

Exa, an AI search technology company, has opened its first Asian office in Singapore to build core engineering for its retrieval infrastructure. The office will develop web-scale systems to handle exabytes of data as part of the company's effort to rebuild search infrastructure for AI applications. The Singapore team will work in the same time zone as Asia-Pacific customers and tap local engineering talent. Singapore's Economic Development Board welcomed the move as a vote of confidence in the city-state as an AI hub. Exa uses a per-query pricing model rather than advertising, with customers including Databricks and Amazon Web Services. The company has raised $85 million at a $700 million valuation whilst developing what it calls a "data layer for AI applications".

Business Insider
Mar 30th, 2026
A $700M Nvidia-backed AI search startup is hiring. Only rebels need apply.

A $700M Nvidia-backed AI search startup is hiring. Only rebels need apply. Mar 30, 2026, 6:00 AM PT * An Nvidia-backed AI search startup is expanding to Singapore. * Exa's CEO, Will Byrk, told Business Insider the startup is hiring "rebellious" engineers. * The world of search is shifting, and engineers need to think from first principles, Bryk said. An Nvidia-backed startup is looking for "rebellious" engineers to help rebuild search for the AI era. Exa, which builds search infrastructure for AI applications, said it is opening a Singapore office on Monday as part of its push into Asia-Pacific. Exa has only a handful of staff in Asia-Pacific, and plans to hire up to 10 engineers across backend, infrastructure, and product roles in the coming months. In an exclusive interview with Business Insider, CEO Will Byrk said he is hiring "rebellious" engineers. "Someone who doesn't care about the status quo, how things were done in the past, can think from first principles about everything - that's really important," he said. Search systems built for AI are still new, and they require rethinking how search works because humans and AI behave differently, he added. "I don't believe it when people say you can't do something. So I think we want engineers who feel the same way," Byrk said. Byrk also said Exa prioritizes candidates' values above all else, and the company is open to hiring junior and senior engineers. "Do they really have passion for building search or building large-scale systems?" he said, adding that experience is "not as important." To assess candidates for their character, Exa flies them to San Francisco to work with the team for one to two days. Exa has about 80 employees globally and is actively hiring in San Francisco, Zurich, and Singapore. "That allows us to really see what a person's like, because you don't just get to see their output on a real project, but you also, you know, eat with them at lunch and dinner," he said. "You really get to know a person." Byrk added that the best engineers should move fast and use AI tools effectively. Most of the company's code is written by AI, he said. Expansion into Singapore. Exa raised $85 million in a Series B round led by Benchmark in September at a $700 million valuation. Investors include Lightspeed, YCombinator, and NVentures, Nvidia's venture capital arm. The company, founded in 2021, said it serves web search to thousands of customers, including AI startups such as Cursor, as well as private equity and consulting firms. "The number of searches from AIs are going to exceed the number of humans," Byrk told Business Insider. "The whole world of search is shifting." Byrk said the Singapore office will serve as a "massive scale infrastructure," including data pipelines and crawling infrastructure to gather and process information across the internet. "Singapore has some of the best engineering talent in the world," Byrk said. "People are really smart, and they have a lot of hustle." Do you have a story to share about AI startups in Asia? Contact this reporter at [email protected].

Browserbase
Mar 17th, 2026
Introducing Browserbase Search.

Introducing Browserbase Search. Thomas Katwan Software Engineer Harsehaj Dhami Growth Engineer March 17, 2026 TL;DR: Browserbase, Inc. is launching Browserbase Search, a simple API that lets agents search the web and get back relevant URLs to start navigating. It's powered by Exa and natively integrated into the Browserbase platform. Your agents need to search the web, just like humans. That sounds simple, but it turns out to be one of the first problems every agent runs into. When an agent doesn't know the exact URL it needs, it has to figure out where to start. That usually means running a search. Browserbase, Inc. has seen this pattern over and over again across Browserbase workloads. In fact, during its last billing cycle, Browserbase, Inc. saw 4.5 million requests to google.com run through its proxies. Search is one of the most common first steps agents take before navigating to the page where real work happens. Since Browserbase, Inc. already provide the agent infrastructure to interact with the web, Browserbase, Inc. thought it made sense to bring search into the platform as well. So Browserbase, Inc. built Browserbase Search, a Search API optimized for agents, accessible via its REST API, TypeScript and Python SDK with AI-native formats such as JSON, Markdown or HTML. Powered by Exa. To power the search layer, Browserbase, Inc. has partnered with Exa, which has built one of the best search APIs designed specifically for AI agents Exa's models are optimized for navigational queries, which typically run when agents are looking for a specific page or resource on the web. That makes it a natural fit for the types of workflows its customers and developers are already building on Browserbase. By combining Exa's search with its browser infrastructure, agents can now search for where they need to start and immediately navigate to it in just a few lines of code. The API. The Search API is intentionally simple. You send a query and get back the relevant results. import {Browserbase} from "@browserbasehq/sdk"; const bb = new Browserbase({ apiKey: process.env.BROWSERBASE_API_KEY!}); const searchResponse = await bb.search.web({ query: "a web browser for ai agents", numResults: 10,}); { "requestId": "string", "query": "a web browser for ai agents", "results": [{ "id": "string", "url": "string", "title": "string", "image": "Image URL if available", "favicon": "Image URL if available",}]} That's it. Every result returns a page url and when available, a title and description. Results are ranked by relevance, and optimized for navigational queries. An agent might search for relevant pages, fetch their contents, and then decide whether it needs to launch a browser to interact with a page. Search | (Fetch) | browse. Search helps the agent discover where to go, Fetch retrieves the page content, and browsers handle deeper interaction. Together, these primitives make it easier to build agents that can understand and navigate the web all in one platform. Get started. Search is available on all plans with 1,000 free searches per month, included. Read more in the docs. Happy searching!