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Senior Backend EngineerLinkup Inc • San Francisco, California, United States
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Senior Backend Engineer

Linkup Inc
  • US
    San Francisco, California, United States
  • US
    San Francisco, California, United States
Postuler Maintenant

À propos

About the role We’re looking for a top‑tier Backend Engineer to join our tech team and work hand‑in‑hand with our CTO, Denis Charrier, and the rest of the tech team.
Your core responsibilities will be to:
Build and operate large-scale, distributed systems powering AI-ready web search
Develop APIs, data pipelines, and microservices for indexing, retrieval, and monitoring
Optimize performance, scalability, and resource usage across our stack
Participate in architecture discussions and contribute to system design
Collaborate with ML and product teams to deliver data-driven features
Write clean, maintainable code and participate in code reviews
Requirements You’re a great match if you:
Are excited to help build Google for AI agents- and believe in Linkup’s mission
Have strong experience in backend development (3y minimum)
Understand distributed systems, caching, and data storage internals
Care about performance, reliability, and code quality
Enjoy debugging tough production issues and optimizing performance bottlenecks
Are curious about AI infrastructure and retrieval systems
Thrive in a fast-paced, high-ownership startup environment
Example Projects
Index hundreds of millions of web pages every day, with Add multimodal search (text + images + audio) under 150 ms
Stream 1 B embeddings / day for while minimizing compute costs
Auto‑retrain ranking on agent clicks every 24 h
Our Stack
Node.js / NestJS
Python
Java
PostgreSQL
OpenSearch
Vespa
Apache Storm
Kubernetes
GitHub Actions
Terraform
Details The ideal candidate will play a central role in our engineering team, partnering closely with the founders to spearhead groundbreaking products. Your backend expertise will shape the future of AI‑powered applications and bring our vision to life.
We offer a flexible remote‑work policy- see the details here.
Join us and leverage your expertise to push the boundaries of AI!
About Linkup Our Vision We believe in a future of AI agents and the agentic web . These digital entities can create more value for humanity than we ever could alone, but they depend on the internet to operate, collaborate, take action, and gather information.
AI agents need web search . To perform well, they require information that is current, reliable, and context‑specific—not the diffuse, steadily aging knowledge frozen at their last training cut‑off.
Modern web search is built for humans, not AIs . Instead of trusted facts, it serves links, ads, and click‑bait. People want visually engaging pages; AI systems need structured truth. An AI can absorb oceans of data, while human attention barely skims the surface. Humans think visually and intuitively; AI reasons in latent space.
Web 2.0 is sunsetting . The deck is being reshuffled, and the Bing‑Google search oligopoly is crumbling. Indexing ever more pages is no longer the goal; semantically organizing facts for AI systems is. In the coming agentic web, Google’s ad‑driven model has no natural home.
Search for AI must be rebuilt from the ground up . We are reconstructing the web as a rigorously structured knowledge layer, mapping every concept, entity, and claim into a coherent semantic graph. This foundation delivers verified facts and rich context to AI instantly, unlocking faster reasoning, higher accuracy, and radically more useful answers for everyone.
Humans search Google; AI searches Linkup.
Our Mission Reality never stands still, and neither should intelligence. Linkup reconnects language models to a living stream of verified facts, ensuring AIs remain as current and insightful as the world they serve.
Our mission is to deliver the world’s freshest, most trusted knowledge to AIs.
Our Culture Our culture is built on the following values:
Mission . We believe we play a critical role in building the agentic web. We are 100% committed to our mission of bringing the reality of the world to AI agents.
Speed . We build fast, we build to last. We get things done, well.
Ownership . We empower every team member to take ownership of their projects, ensuring they see them through to successful completion.
Teamwork . Our strength lies in our unity. We rely on one another and embrace our diversity as a core asset.
Humility . We maintain low egos, showing respect for others and continuously learning from their insights and experiences.
We expect all team member to take an active role in shaping our company culture.
Our Team We are small technical team, working shoulder to shoulder to build the web of agents.
A bit more about our 3 co-founders:
Philippe Mizrahi- Led the development of Lyft’s Autonomous Vehicles marketplace. Previously launched Amundsen, an open source search engine.
Denis Charrier- Founding Engineer at Niland, an audio search company (acquired by Spotify), then Staff Engineer at Spotify. 15y of software development experience.
Boris Toledano- Led robotics at Carrefour, after 3y at McKinsey & Co working on public affairs and digital transformation.
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  • San Francisco, California, United States

Compétences linguistiques

  • English
Avis aux utilisateurs

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