Rehearsals Logo

Rehearsals

Founding Engineer

Reposted 2 Months Ago
Be an Early Applicant
In-Office
New York City, NY, USA
140K-500K Annually
Mid level
In-Office
New York City, NY, USA
140K-500K Annually
Mid level
Join as a founding full-stack engineer building AI simulation products. Work on web frontend (TypeScript, Next, React), data stacks and scraping, run experiments on simulation engines, and build infrastructure like research tooling, CI/CD, and internal code-review tooling. Focus on scalable data systems or reusable frontend component libraries.
The summary above was generated by AI
ABOUT REHEARSALS
The team is ex-DeepMind, ex-Databricks, and ex-Stanford. We launched the first Gemini API, designed Google Lens, post-trained state-of-the-art coding models, started companies that have been acquired, and been awarded more than 25 patents.

Rehearsals is the only company that builds AI twins of real people. Companies use our technology to predict consumer behavior and reactions at scale, in hours instead of months, with 92% accuracy to what real people would do.

We are backed by a16z (Speedrun Fund), Factorial Fund, and 25madison, along with angel investors from DeepMind and OpenAI including Logan Kilpatrick. Revenue is growing 3x month over month. We work with category leaders across CPG, luxury goods, consumer technology, and gaming.

You will be on the founding team, building your life's work. We hire for four things: ownership, agency, craft, and conscientiousness.

WHAT YOU'LL DO
  • Build the full-stack experience of how the world will experience the future of AI simulations in a modern web dev stack (TypeScript, Next, React).
  • Work on our data stack, including being the in-house expert on data scraping.
  • Run experiments to improve our revealed preference and simulation engines.
  • Work on infrastructure such as research tooling, CI/CD, and internal code review agents that scales our impact.

We are particularly interested in engineers with strong foundations who have a particular aptitude in either data or frontend. This could include either or both of:

  • Architecting extensible and highly performant systems for processing and storing massive datasets at scale.
  • Driving the development of beautiful frontends by creating a library of thoughtfully composed, reusable components.

Ultimately your overall capability is the most important thing. Amazing generalists are always exciting to us.

WHAT WE'RE LOOKING FOR
  • Bachelor's degree in Computer Science, Math, Physics, or equivalent experience.
  • 3+ years of experience (open source contributions count).
  • A track record of shipping quality software and infrastructure in production.
  • Ability to work 5 days in-person in our NYC office.

PERKS & BENEFITS
  • Highly competitive pay and equity.
  • M4 MacBook Pro.
  • Top-tier healthcare, dental, and vision.
  • $1,000/month for food and a gym membership.
  • Relocation if you are moving to New York.

CULTURE
We are not a 40-hour-a-week company. Everyone here works hard, moves fast, and takes full ownership. We care deeply about what we are building and about building it together.

BONUS POINTS
Want to stand out? Go to rehearsalsresearch.com and go through one of our interviews before we talk. It is the fastest way to feel how we turn real people into twins. Come tell us what you thought.

COMPENSATION
The base pay range for this role is $140,000 to $500,000 per year.
HQ

Rehearsals New York, New York, USA Office

24 W 30th, New York, NY, United States, 10001

Similar Jobs

9 Days Ago
Hybrid
New York City, NY, USA
170K-200K Annually
Senior level
170K-200K Annually
Senior level
Artificial Intelligence • Software • Consulting
Lead technical execution as DreamLever’s first in-house engineer. Build and ship full-stack product improvements, improve the AI Chief of Staff agent, understand and extend the existing production system, and maintain reliable engineering foundations. Work closely with the founder on product decisions, coordinate external engineering support, review delegated work, and ensure fast, polished delivery.
Top Skills: Ai Coding AgentsLlmsNext.JsPostgresReactSupabaseTypescript
25 Days Ago
In-Office
New York, NY, USA
195K-400K Annually
Entry level
195K-400K Annually
Entry level
AdTech • Artificial Intelligence
Conduct applied AI and machine learning research spanning multimodal intelligence, recommendation, ranking, prediction, foundation models, agents, and decision-making. Define research problems, evaluate and develop models using proprietary data, run rigorous experiments, create training signals and evaluations, and transition successful approaches into production systems. Collaborate with engineering and product teams while shaping the company’s research agenda and technical standards.
Top Skills: Artificial IntelligenceCausal InferenceFine-TuningFoundation ModelsLarge Language ModelsMachine LearningMultimodal ModelsOptimizationRanking ModelsRecommendation SystemsReinforcement LearningRepresentation LearningRetrieval
27 Days Ago
Hybrid
New York City, NY, USA
217K-289K Annually
Senior level
217K-289K Annually
Senior level
Healthtech • Social Impact • Software
Build Grow Therapy’s native Android app from the ground up as the founding Android engineer. Own architecture, developer tooling, testing, CI/CD, production releases, observability, security, and consumer-facing features. Set Android standards and technical direction while partnering with product, design, iOS, and backend teams. The role requires hands-on delivery, strategic decision-making with incomplete information, and preparation for a growing Android organization.
Top Skills: AndroidCi/CdClaude CodeCursorDependency InjectionGithub CopilotGoogle PlayGradleJetpack ComposeKotlinKotlin CoroutinesKotlin FlowKotlin MultiplatformModularization

What you need to know about the NYC Tech Scene

As the undisputed financial capital of the world, New York City is an epicenter of startup funding activity. The city has a thriving fintech scene and is a major player in verticals ranging from AI to biotech, cybersecurity and digital media. It also has universities like NYU, Columbia and Cornell Tech attracting students and researchers from across the globe, providing the ecosystem with a constant influx of world-class talent. And its East Coast location and three international airports make it a perfect spot for European companies establishing a foothold in the United States.

Key Facts About NYC Tech

  • Number of Tech Workers: 549,200; 6% of overall workforce (2024 CompTIA survey)
  • Major Tech Employers: Capgemini, Bloomberg, IBM, Spotify
  • Key Industries: Artificial intelligence, Fintech
  • Funding Landscape: $25.5 billion in venture capital funding in 2024 (Pitchbook)
  • Notable Investors: Greycroft, Thrive Capital, Union Square Ventures, FirstMark Capital, Tiger Global Management, Tribeca Venture Partners, Insight Partners, Two Sigma Ventures
  • Research Centers and Universities: Columbia University, New York University, Fordham University, CUNY, AI Now Institute, Flatiron Institute, C.N. Yang Institute for Theoretical Physics, NASA Space Radiation Laboratory

Sign up now Access later

Create Free Account

Please log in or sign up to report this job.

Create Free Account