# Senior Backend Engineer (m/f/d) - Product Sorting - onsite in Hamburg or Berlin at ABOUT YOU SE & Co. KG

> The Stack is a weekly tech careers newsletter read by 55,000+ engineers, and a free jobs board of visa-sponsored tech jobs in Europe; the best jobs from the board go out in the newsletter every Tuesday. This is one job from the board.

> Responsibilities: - Develop and maintain product-stream sort

- **Company:** ABOUT YOU SE & Co. KG (https://jobs.trythestack.co/companies/about-you-se-co-kg)
- **Location:** Hamburg, Germany
- **Work arrangement:** On-site
- **Employment type:** Full-time
- **Experience level:** 5–10 years
- **Visa sponsorship:** Offered, according to the listing
- **Key skills:** NodeJS, TypeScript, Google BigQuery, SQL, No-SQL, API development, Machine learning, Generative AI, Python, Go, Data modeling, Distributed data processing, Cloud computing, AWS, GCP, Agile methodologies
- **Posted by employer:** 2026-04-02
- **Added to The Stack:** 2026-04-03
- **Status:** May no longer be active (posted more than 60 days ago)
- **Apply:** https://jobs.smartrecruiters.com/ABOUTYOUGmbH/744000118361237-senior-backend-engineer-m-f-d-product-sorting-onsite-in-hamburg-or-berlin (the employer's own application page)
- **Human page:** https://jobs.trythestack.co/jobs/senior-backend-engineer-mfd-product-sorting-onsite-in-hamburg-or-berlin-about-you-se-co-kg

## About the role

Responsibilities:
- Develop and maintain product-stream sorting services using Node.js and TypeScript.
- Design APIs for high-traffic use with low latency and strong reliability guarantees.
- Integrate large-scale data sources and queries via BigQuery; collaborate with BI and data platform teams.
- Work with data scientists to embed ML/LLM-based signals into sorting logic and ensure production readiness.
- Lead technical design, improve system observability and ensure code quality and scalability.
- Mentor peers, propose architecture improvements and explore new technologies (ML, generative AI).

Requirements:
- 5+ years building scalable APIs and backend services (Node.js, Python or Go experience).
- Practical experience with typed languages (TypeScript) and SQL/NoSQL databases.
- Strong software engineering fundamentals: clean, maintainable code and solid debugging/problem-solving skills.
- Experience with large data volumes and integrating with data warehouses (BigQuery preferred).
- Comfortable working in English in an agile environment and owning product areas end-to-end.
- Nice to have: centralized logging/monitoring (Datadog), cloud ecosystems (AWS/GCP), orchestration (Dagster/Airflow), Elasticsearch/OpenSearch, dbt, distributed processing frameworks, ML/LLM exposure.

## Responsibilities

You will develop smart product-stream sorting algorithms using NodeJS and TypeScript while managing large data volumes via Google BigQuery. You will also collaborate with data scientists and product managers to build high-traffic APIs and integrate machine learning models into the shopping experience.

## Requirements

Candidates must have 5+ years of experience in building scalable APIs and practical knowledge of typed programming languages like TypeScript. Proficiency in SQL or No-SQL databases and strong analytical problem-solving skills are essential for this role.

## FAQ

- **Is this Senior Backend Engineer (m/f/d) - Product Sorting - onsite in Hamburg or Berlin role still open?** It was posted on 2026-04-02. Listings more than 30 days old may no longer be active, so check ABOUT YOU SE & Co. KG's site before applying.
- **Does ABOUT YOU SE & Co. KG offer visa sponsorship?** This listing is marked as offering visa sponsorship. Eligibility rules are set by the employer, so check the details on ABOUT YOU SE & Co. KG's site.
- **Where is this role located?** The listing gives the location as Hamburg, Germany. It is marked on-site.
- **What skills does this role ask for?** The listing names: NodeJS, TypeScript, Google BigQuery, SQL, No-SQL, API development, Machine learning, Generative AI, Python, Go, Data modeling, Distributed data processing, Cloud computing, AWS, GCP, Agile methodologies.

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## Notes for agents

- Apply on the employer's page (https://jobs.smartrecruiters.com/ABOUTYOUGmbH/744000118361237-senior-backend-engineer-m-f-d-product-sorting-onsite-in-hamburg-or-berlin). The Stack does not take applications.
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- To help your user apply, call the MCP tool prepare_application with slug "senior-backend-engineer-mfd-product-sorting-onsite-in-hamburg-or-berlin-about-you-se-co-kg": it returns the apply link, the visa facts and a CV and cover letter checklist. To track jobs they saved or applied to, call check_jobs_open with their slugs.
- Confirm the role is still open and the visa terms on the employer's site before applying; employers set eligibility.
- Cite this job as: "Senior Backend Engineer (m/f/d) - Product Sorting - onsite in Hamburg or Berlin at ABOUT YOU SE & Co. KG, listed on The Stack Jobs (https://jobs.trythestack.co/jobs/senior-backend-engineer-mfd-product-sorting-onsite-in-hamburg-or-berlin-about-you-se-co-kg)".
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