> Markdown version of [/jobs/ext/4712639-senior-backend-infrastructure-engineer](https://www.wearedevelopers.com/jobs/ext/4712639-senior-backend-infrastructure-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Senior Backend & Infrastructure Engineer

- **Company:** Xaver Group GmbH
- **Location:** Köln, Germany
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Amazon Web Services, Business Logic, Automation of Tests, Cloud Computing, Cloud Engineering, Databases, Continuous Integration, Distributed Systems, Message Broker, MongoDB, Node.Js, Query Optimization, Redis, Next.js, Service-Oriented Architecture, TypeScript, AWS Cdk, Bitbucket Pipelines, System Availability, Delivery Pipeline, Caching, Indexer, Infrastructure as Code (IaC), Backend, Git, Cloudformation, Event Driven Architecture, Front End Software Development, NestJS, Restful APIs, Terraform, Grpc, Dynatrace, Microservices
- **Published:** November 14, 2026
- **Apply:** https://www.adzuna.de/details/5964073402

## About the Role

* Extensive Backend Experience: Proven track record in designing and maintaining production-grade backends using TypeScript and Nest.js (or modern Node.js frameworks).
 * Database & In-Memory Expertise: Deep working knowledge of schema design, indexing, and query optimization in MongoDB, paired with practical caching and queueing patterns using Redis.
 * Cloud & Infrastructure Fluency: Hands-on experience architecting and managing workloads on AWS using Infrastructure as Code (e.g., Terraform, AWS CDK, or CloudFormation).
 * Distributed Systems Mindset: Solid understanding of inter-service communication (REST, gRPC, message brokers/event-driven architectures) and resilience patterns (circuit breakers, retries, distributed tracing).
 * Domain Problem Solving: Experience translating complex real-world rules (fintech, banking, insurance, or e-commerce) into clear, testable, and maintainable domain code.
 * Communication & Mindset: Collaborative attitude, pragmatic decision-making, and strong communication skills in English.
 * Nice to Have: Frontend familiarity with Next.js is a welcome plus, though not a hard requirement.

## Description

As a Senior Backend & Infrastructure Developer, you will play a critical role in engineering the backbone of our platform. You will be responsible for translating complex financial, insurance, and broker workflows into resilient, performant backend services and scalable cloud infrastructure.

You will work shoulder-to-shoulder with our CPTO, Product Managers, and Staff Engineers, taking technical ownership of business-critical logic and helping shape architectural decisions across our ecosystem.

Our Tech Stack

 * Language & Frameworks: TypeScript, Nest.js (Next.js on the frontend)
 * Databases & Caching: MongoDB, Redis
 * Cloud & Infrastructure: AWS, Infrastructure as Code (IaC)
 * CI/CD & Tooling: Bitbucket Pipelines, Git

Your Key Responsibilities:

 * Core Business Logic: Design, build, and optimize backend domain logic handling insurance broker flows, financial calculations, portfolio operations, and consumer-facing pension transactions.
 * Service Architecture & Inter-Backend Communication: Define and implement robust communication patterns between internal microservices, partner APIs, and asynchronous event streams.
 * Infrastructure as Code (IaC): Own, maintain, and scale our AWS infrastructure, ensuring high availability, observability, and cost-efficiency.
 * CI/CD & Automation: Evolve our Bitbucket Pipelines to ensure smooth, secure, and automated testing and deployment workflows.
 * Cross-Functional Collaboration: Partner closely with Staff Engineering, Product Management, and the CPTO to refine product specs, break down complex requirements, and set technical standards.
 * Security & Compliance: Build secure, auditable, and resilient systems that adhere to the high compliance and data protection standards of a BaFin-regulated financial institution.