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# Senior Backend Engineer

- **Company:** Nelly Solutions GmbH
- **Location:** Berlin, Germany
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Amazon Web Services, Extract Transform Load (ETL), Node.Js, TypeScript, Data Ingestion, Large Language Models, Backend, Build Management, Core Data, Integration Frameworks, Event Sourcing, Data Pipelines
- **Published:** May 24, 2026
- **Apply:** https://de.indeed.com/viewjob?jk=d167eba5465cb0bd

## About the Role

Do you have experience in TypeScript?, Do you have a Master's degree?, * 8+ years backend-leaning experience, strong TypeScript/Node.js.

 * Deep experience with data pipelines, ETL/ELT, and third-party integrations (queues, retries, idempotency, schema evolution).
 * Strong data and API modeling - you've designed schemas that survived three product pivots.
 * AWS in production.
 * Bonus: healthcare/fintech data, event sourcing, MCP/LLM tooling experience.

## Description

We're on the lookout for an ambitious Senior Backend Engineer to join our Core data team at our office in Berlin. Join us in building the largest AI enabled fintech for healthcare!

Core Data is responsible for providing data to product feature development and agent building teams across Nelly - effectively an MCP for the rest of the company. We own the ingestion pipelines, the canonical data model, and the tooling that lets product and AI teams build on top of clean, reliable data., * Design and build ingestion pipelines that pull data from third-party PMS systems into Nelly's core data model.

 * Own backend services in TypeScript/Node.js on AWS - event-driven, idempotent, observable.
 * Evolve the canonical data model that every product team at Nelly builds on.
 * Build the MCP servers and AI tooling that expose Core Data to internal agents and LLM-powered workflows - a chance to shape how AI ships at Nelly.
 * Partner with product teams to triage and resolve ingestion issues by impact.


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