# Mid/Senior Backend Engineer (Node.js, TypeScript) (m/f/x) at reisetopia GmbH

> 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: - Design, implement, and maintain scalable

- **Company:** reisetopia GmbH (https://jobs.trythestack.co/companies/reisetopia-gmbh)
- **Location:** Germany
- **Work arrangement:** On-site
- **Employment type:** Permanent
- **Experience level:** 5–10 years
- **Visa sponsorship:** Offered, according to the listing
- **Key skills:** Node.js, TypeScript, SQL, MongoDB, API Design, Express, Jest, Selenium, Cypress, Software Architecture, LLM Integration, Reactjs, Nextjs, Backend Development, Code Review, Mentorship
- **Posted by employer:** 2026-07-17
- **Added to The Stack:** 2026-07-17
- **Status:** May no longer be active (posted more than 60 days ago)
- **Apply:** https://reisetopia.jobs.personio.de/job/2716991 (the employer's own application page)
- **Human page:** https://jobs.trythestack.co/jobs/midsenior-backend-engineer-nodejs-typescript-mfx-reisetopia-gmbh

## About the role

Responsibilities:
- Design, implement, and maintain scalable backend services and REST/GraphQL APIs using Node.js and TypeScript.
- Build and maintain integrations with partners and third-party services (travel/hotel suppliers, payments, CRM).
- Design and optimise relational and NoSQL data models (SQL + MongoDB) for performance, integrity and reliability.
- Explore and integrate AI/LLM capabilities to add automation and intelligent features to the product.
- Contribute to architecture decisions, system design, and long-term scalability strategies.
- Ensure code quality via testing (unit/integration), code reviews, documentation and CI practices.
- Mentor junior engineers, share best practices, and drive continuous process improvements.

Requirements:
- 4+ years professional software engineering experience, with ≥3 years using TypeScript and Node.js in production.
- Strong SQL skills and practical experience with NoSQL (MongoDB); good data modelling experience.
- Proven experience building APIs and managing external integrations.
- Familiarity with testing frameworks and tooling (e.g., Jest, Selenium, Cypress) and CI/CD workflows.
- Solid understanding of software architecture, performance, security and maintainability.
- Good communication and collaboration skills; willingness to relocate to Berlin (visa/relocation support available).

## Responsibilities

Design and maintain scalable backend services and APIs using Node.js and TypeScript to power customer journeys and partner integrations. Integrate AI capabilities and optimize relational data models to enhance product innovation and system reliability.

## Requirements

Requires 4+ years of professional software development experience, with at least 3 years specializing in TypeScript and Node.js. Must have strong proficiency in SQL/NoSQL databases and experience with API integration and testing tools like Jest.

## FAQ

- **Is this Mid/Senior Backend Engineer (Node.js, TypeScript) (m/f/x) role still open?** It was posted on 2026-07-17. Listings more than 30 days old may no longer be active, so check reisetopia GmbH's site before applying.
- **Does reisetopia GmbH offer visa sponsorship?** This listing is marked as offering visa sponsorship. Eligibility rules are set by the employer, so check the details on reisetopia GmbH's site.
- **Where is this role located?** The listing gives the location as Germany. It is marked on-site.
- **What skills does this role ask for?** The listing names: Node.js, TypeScript, SQL, MongoDB, API Design, Express, Jest, Selenium, Cypress, Software Architecture, LLM Integration, Reactjs, Nextjs, Backend Development, Code Review, Mentorship.

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## Notes for agents

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