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ABOUT YOU

E-commerce fashion retailer offering personalized recommendations

Senior Backend Engineer - Sorting

Backend EngineeringPosted on Nov 10
Full-time€70k - €85k /yrHybrid

About the Job

Requirements

  • At least 5 years of backend systems development experience; Node.js/TypeScript experience is ideal, but experienced developers with Java, Go, or Kotlin backgrounds are also considered.
  • Very good practical SQL skills, especially developing Postgres and MySQL schemas, optimizing queries, and performing batch operations beyond basic ORM usage.
  • Good algorithmic understanding of sorted data, deduplication, latency trade-offs, and implementing constraints.
  • Clear communication in English and a pragmatic, solution-oriented approach.

Responsibilities

  • Combine machine-learning model results with business logic such as campaign boosts or sponsored products to shape how millions of users see products.
  • Develop and own the high-performance Spotsetter ranking engine to ensure fast, deterministic, and fair product sorting.
  • Design and implement reliable batch-write pipelines that transfer data directly from BigQuery into high-performance relational databases such as Postgres and MySQL.
  • Develop low-latency APIs for serving ranking data using Fastify and Node.js/TypeScript.
  • Collaborate closely with data engineers, product managers, and commercial teams to make data-driven product-sorting decisions.
  • Help shape the technical architecture with the tech lead, contribute ideas, and continuously improve a clean, maintainable codebase.

Desired Qualifications

  • Knowledge of job queues such as BullMQ and Redis, and batch-processing pipelines.
  • Familiarity with cloud technologies such as AWS Step Functions, CDK, or GCP/BigQuery.
  • An e-commerce background and exposure to sponsored products or ad-tech systems.
  • Interest in learning-to-rank algorithms and willingness to develop expertise in the area.

About the Company

ABOUT YOU

E-commerce fashion retailer offering personalized recommendations

ABOUT YOU is an online fashion retailer that offers a wide range of clothing, shoes, and accessories from over 2,000 top brands. The company serves fashion-conscious women who follow the latest trends and styles. It runs on an e-commerce website that provides a seamless shopping experience with a user-friendly interface, easy ordering, and multiple payment options. Revenue comes from selling products directly to consumers, often supported by promotions and discounts. Data analytics power personalized shopping by recommending items based on individual preferences and browsing history. Compared with competitors, ABOUT YOU stands out with its expansive brand selection, data-driven personalized recommendations, frequent promotions, and a focus on a smooth online experience. The company's goal is to help customers discover and buy the latest fashion items efficiently while driving sales through tailored offerings.

Company size
1,001-5,000
Company stage
IPO
Headquarters
Hamburg, Germany
Founded
2013

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