Senior AI-Driven Search & Recommendation Engineer

Randstad Singapore; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

Randstad Singapore is seeking a Senior Search & Recommendation Algorithm Engineer to architect our platform’s core discovery engine and move global growth metrics like GMV, CVR, and user retention.

You will transform massive multi-modal e-commerce datasets into real-time, hyper-personalized experiences for millions of shoppers, shaping retrieval, ranking, and personalization at scale.

Qualifications

• Master’s or Ph.D. in Computer Science, ML, Data Science, or a highly quantitative field.
• 3-5+ years of hands-on experience building large-scale search, recommendation, or digital advertising systems.
• Strong familiarity with e-commerce concepts like multi-task learning, cold-start strategies, and graph neural networks for item matching.

Responsibilities

• Design and scale multi-channel retrieval strategies—including vector search (graph-based approximate nearest neighbors), collaborative filtering, and knowledge graph embedding to surface high-quality candidates from millions.
• Develop, deploy, and maintain state-of-the-art deep learning models for CTR and CVR prediction.
• Build advanced NLP and large language model pipelines focusing on query intent classification, tokenization, synonym expansion, and semantic entity extraction.
• Implement sophisticated user interest modeling to capture long-term and real-time behaviors, balancing hyper-personalization with item diversity.
• Formulate offline evaluation metrics (NDCG, GAUC) and lead online A/B testing frameworks to validate live algorithms.
• Partner with Data and MLOps teams to build low-latency online inference services and scalable distributed training.

Skills

AI

LLM

Software Architecture

Backend Development

Product Management

Education

Master’s or Ph.D. in CS/ML/Data Science

Tools

Python

C++

PyTorch

TensorFlow

DeepRec

TorchRec

Spark

Hive

Flink

Milvus

Pinecone

Qdrant

Job description

Randstad Singapore is seeking a Senior Search & Recommendation Algorithm Engineer to architect our platform’s core discovery engine and move global growth metrics like GMV, CVR, and user retention.

You will transform massive multi-modal e-commerce datasets into real-time, hyper-personalized experiences for millions of shoppers, shaping retrieval, ranking, and personalization at scale.