Backend Engineer - Search, Ads & Recommendation Mandarin Required at Fuku | NY, US | Rezi

Backend Engineer - Search, Ads & Recommendation Mandarin Required at Fuku

Backend Engineer - Search, Ads & Recommendation Mandarin Required

Fuku · NY, US

1 months ago

Backend Engineer - Search, Ads & Recommendation Mandarin Required

Fuku · NY, US

a month ago
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About the Role

Join a rapidly scaling global consumer internet platform as a Backend Engineer focused on Search, Ads & Recommendation. You will work on core engineering systems supporting hundreds of millions of users across content, community, e-commerce, and advertising. This role involves tackling challenges in distributed systems, high concurrency, system architecture, latency, and performance optimization, with a unique opportunity to integrate LLMs and multimodal AI into production at massive scale.

Responsibilities

  • Design, build, and continuously optimize the core engine and business architecture powering Search, Advertising, and Recommendation.
  • Build systems supporting both the company's main platform and international product.
  • Develop highly scalable online services capable of supporting tens to hundreds of millions of users.
  • Lead the productionization of LLM and multimodal capabilities across Search, Recommendation, and Advertising.
  • Own service design, backend development, end-to-end latency optimization, and system performance optimization.
  • Build production-grade AI applications and infrastructure involving LLM-powered features, RAG pipelines, agent workflows, prompt engineering, and systematic LLM pipelines.
  • Ensure AI-powered systems operate reliably and efficiently at scale.
  • Build the engineering bridge between model capabilities and real-world product experiences.
  • Work closely with algorithm and machine learning teams to bring model capabilities into production.
  • Design backend systems capable of supporting large-scale online Search, Ads, and Recommendation workloads.
  • Optimize end-to-end architecture for high concurrency, high availability, low latency, scalability, and production reliability.
  • Design and abstract shared engineering frameworks and platform components for reuse across multiple business lines.
  • Reduce duplicated engineering work across Search, Recommendation, and Ads.
  • Improve overall engineering efficiency, system quality, and maintainability.
  • Identify architectural risks early and proactively drive technical solutions through to production.

Requirements

  • Bachelor’s degree or above in Computer Science or a related field, or equivalent practical experience.
  • Minimum 3+ years of experience building large-scale backend systems and distributed systems.
  • Proficient in at least one of: Java, C, or C++.
  • Strong software engineering fundamentals.
  • High standards for code quality, system design, and engineering discipline.
  • Deep understanding of high-concurrency distributed systems, high-availability architecture, and large-scale system design.
  • Strong practical experience in system scalability, performance optimization, and latency optimization.
  • Mature methodology for identifying and resolving scalability and performance bottlenecks.
  • Hands-on experience putting LLMs into production.
  • Practical experience with one or more of: RAG, agents/agent workflows, prompt engineering, systematic LLM pipeline development.
  • Ability to combine AI capabilities with Search, Advertising, and Recommendation products.
  • Experience designing reliable production systems around LLM or multimodal capabilities.
  • Experience developing products or systems serving tens of millions of users.
  • Ability to independently own architecture design, key domain modeling, and critical backend systems.
  • Strong system abstraction and architecture design capabilities.
  • Ability to identify architectural risks early and proactively drive them to resolution.
  • Strong business awareness and technical judgment.
  • Strong sense of ownership and ability to independently drive complex technical projects.
  • Effective cross-team collaborator.
  • Comfortable working closely with algorithm engineers, machine learning teams, product teams, and backend engineering teams.
  • Proficiency in both Mandarin Chinese and English is mandatory.
  • Comfortable collaborating across globally distributed engineering teams.
  • Experience building or operating large-scale Search, Advertising, or Recommendation systems (Nice to Have).
  • Experience supporting international products or overseas engineering projects (Nice to Have).

Skills

  • Backend Engineering
  • Search
  • Ads
  • Recommendation
  • Distributed Systems
  • High Concurrency
  • System Architecture
  • Latency Optimization
  • Performance Optimization
  • LLM Integration
  • Multimodal AI
  • AI-Native Applications
  • RAG
  • Agent Workflows
  • Prompt Engineering
  • Systematic LLM Pipelines
  • Java
  • C
  • C++
  • Scalability
  • High Availability
  • System Design
  • Code Quality
  • Engineering Discipline
  • Business Awareness
  • Technical Judgment
  • Ownership
  • Collaboration
  • Mandarin Chinese
  • English

Location

  • New York City

Work Type

  • Onsite (5 Days)

Experience Level

  • 3+ years

Education Level

  • Bachelor's degree or above in Computer Science or related field, or equivalent practical experience

About the Company

  • A rapidly scaling global consumer internet platform with hundreds of millions of users across content, community, e-commerce, and advertising ecosystems.
  • Expanding internationally and building out engineering capabilities in New York to support its growing global user base.