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Harnham

Senior Backend Engineer

Harnham, New York, New York, us, 10261

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This range is provided by Harnham. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more. Base pay range $200,000.00/yr - $300,000.00/yr Direct message the job poster from Harnham Recruitment Consultant | Data & Software Engineering at Harnham New York, NY (4 days on-site) $200,000–$300,000 + bonus + RSUs About the Company A rapidly scaling e-commerce technology leader is transforming real-time personalization. Their platform ingests and processes massive streams of user interactions in milliseconds—combining sophisticated data systems and machine learning models to deliver hyper-relevant customer experiences exactly when they matter most. The Role The Real-Time Relevance team builds and scales the distributed systems that power instant, personalized decisioning across the platform. As a Senior Backend Engineer, you’ll work at the intersection of high-performance backend architecture and machine learning infrastructure—designing services that ensure speed, precision, and adaptability across billions of events. You’ll also help evolve the company’s feature store, enabling real-time model consumption organization-wide. This role offers deep technical ownership across large-scale systems, distributed engineering, and production MLOps. Responsibilities

Architect and implement backend services supporting real-time personalization and ML feature delivery Build and optimize high-throughput, low-latency distributed systems using Go Collaborate with ML teams to deploy models and develop production MLOps workflows Improve performance, reliability, and scalability of mission-critical systems Contribute to the design of real-time data pipelines and feature management layers (PySpark, Scala) Lead end-to-end initiatives from design through deployment in a fast-paced environment

Go, PySpark, Scala, Spark, Kubernetes, Kafka, AWS — alongside other modern distributed systems technologies. Ideal Background You’re an experienced backend engineer who has built and scaled systems supporting high-volume, real-time data workloads. You understand distributed systems fundamentals—latency optimization, fault tolerance, scalability—and have partnered with ML or data engineering teams to deliver production machine learning capabilities. Experience in high-growth startups or top-tier tech environments is a strong plus. Why Apply This is an opportunity to own core infrastructure powering real-time personalization at massive scale. You’ll collaborate with world-class engineers, shape the architecture behind cutting‑edge ML systems, and see your work directly impact product performance and customer experience. Seniority level

Mid‑Senior level

Employment type

Full‑time

Job function

Engineering and Information Technology Industries: Retail and Software Development

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