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# Senior Fullstack Developer - Claude Code Expert (Remote or Hybrid)

- **Company:** soonami.io GmbH
- **Location:** Berlin, Germany
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Clean Code Principles, Artificial Intelligence, User Authentication, Cross-Origin Resource Sharing (Ajax Programming), Github, Identity and Access Management, Node.Js, OAuth, Svelte, Responsive Web Design, Software Engineering, Twilio, TypeScript, Google Cloud, Tailwind, Firebase, Backend, Stripe, Front End Software Development, Restful APIs, Webhooks
- **Published:** July 19, 2026
- **Apply:** https://www.adzuna.de/details/5804552747

## About the Role

If you love clean code, enjoy developing creative solutions and want to work on meaningful projects, then you've come to the right place., You are highly experienced in AI based software development - preferably Claude Code.

Your skillset - Backend

 * TypeScript (advanced level)

 * Firebase/GCP Ecosystem

 * Node.js/Express

 * REST API Design - Deep understanding of HTTP, status codes, error handling

 * OAuth2 JWT Authentication based on Firebase solution

 * Skilled in implementing GitHub-based CI/CD pipelines for Firebase Functions

across development, staging, and production environments.

 * Experience with

o Twilio Integration

o Stripe integration

Nice to have - Backend

 * Experience with Firebase Admin SDK v12+ (breaking changes from v10)

 * Knowledge of webhook-driven architectures (Stripe, Twilio webhooks)

 * CORS configuration and cross-origin security in alignment with Google Cloud IAM

permissions

 * Mailjet or similar email services

Your skillset - Frontend (Supporting role)

 * SvelteKit v2

 * Svelte 5 with runes ($state, $derived, $effect)

 * TypeScript

 * Tailwind CSS

 * Responsive design

Benefits

 * Collaboration in an experienced team that has already built successful platforms

 * Involvement in all processes of company development

 * Plenty of scope for creativity and personal responsibility

 * Flexible working hours and a dynamic, appreciative environment

 * Access to an inspiring network of exciting personalities



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