Senior Backend Engineer - Search & Discovery (all genders)
Primary stack
Nice to have's
Job description
About the Position
Senior Backend Engineer - Search & Discovery (all genders)
ABOUT YOU
Hybrid | Hamburg or Berlin, Germany | Experienced
About the Product & Tech Department
Our mission is to digitize the classic shopping stroll, turning it into a personalized, inspiring experience for every customer. Technology and data sit at the center of everything we build. We are not a fashion company with a tech team on the side. Tech drives our product, our strategy, and our growth.
Our proprietary tech stack powers our own shops and SCAYLE, our commerce infrastructure solution that serves over 350 brands globally. Same foundation, bigger stage. The challenges keep things interesting.
What To Expect
- Develop the search engine behind ABOUT YOU, covering query understanding, entity resolution, and semantic vector search in Node.js/TypeScript
- Blend OpenSearch relevance, embedding similarity, and behavioral re-ranking signals into unified search results
- Build search-index pipelines (entities, synonyms, k-NN product vectors) streaming data from BigQuery into OpenSearch
- Integrate LLMs and embedding models (Gemini, Vertex AI) under tight latency budgets with caching and fallback layers
- Guard search relevance using golden lists, regression suites, and continuous A/B experiments
- Shape architecture alongside our Tech Lead and collaborate closely with data analysts, engineers, and product managers
Who You Are
- You love investigating the "why" behind search outcomes and turning those findings into actionable technical improvements
- 5+ years of experience building scalable, low-latency backend APIs (Node.js/TypeScript preferred, or fast-converting from Java, Go, or Kotlin)
- Real depth in Elasticsearch/OpenSearch (mappings, custom analyzers, percolators, scoring functions) beyond just basic query clients
- Strong algorithmic intuition for ranked data (merging, deduplication, score blending, and latency trade-offs)
- You're excited to bridge backend engineering and ML by serving model scores, embeddings, or LLM features in production
- Fluent English communication skills and a pragmatic, data-curious mindset
Nice to Have
- IR/NLP fundamentals (tokenization, multilingual search, relevance evaluation frameworks)
- Vector search experience (k-NN/HNSW indices, SigLIP embeddings, recall vs. latency tuning)
- LLM engineering (prompt caching, timeout budgets, Datadog LLM Observability)
- Familiarity with BigQuery, dbt, or Dagster pipelines
Salary Range
70k - 85k €
Benefits and Add-ons
Yes, we have thought about that too.
Look at our benefits
About the Company
We take it as our responsibility to create an environment where everyone feels welcome, exactly as they are. Different backgrounds and perspectives make us stronger and shape our culture in ways that matter. What we stand for internally, we stand for as a brand: acceptance, inclusion, and a fairer approach to fashion.
© About You. This job description was sourced from the employer's public career page. TheJob is not the employer — we index the posting and route candidates to the source. All content rights and hiring decisions belong to the employer.
ABOUT YOU is one of the fastest growing eCommerce companies in Europe and Hamburg’s first unicorn with a value of more than USD 1 billion. Our newest product the ABOUT YOU CLOUD a Infrastructure for High Scale eCommerce; ABOUT YOU CLOUD is an api based and enterprise ready infrastructure solution. Designed for ambitious eCommerce companies with +100m revenue.As a fashion and technology corporation, along with our strong team, our ambition is to digitalize the classic shopping stroll by creating an inspiring and personalized shopping experience on the smartphone. This is why we created ABOUT YOU, a shopping destination where people can discover fashion that really fits their personality from a range of more than 1.200 brands. With its consistent focus on personalization, inspiration and mobile shopping, ABOUT YOU has created sales in excess of €461 million in the fifth fiscal year 2018/19 and is now one of the largest fashion e-tailers in Germany.5 years old — 7 markets in 4 years 461 million EUR revenue in fiscal year 2018/19 > 1 billion USD company value > 500 employees from over 30 nationalitiesShort Video about us:www.youtube.com/... _continue=1&v=acYbrTxdZtIaboutyou.com&cloud.aboutyou.com
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