Senior Fullstack Developer (m/w/d) - Claude Code Expert (Remote or Hybrid)

Posted 2 Days Ago
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Hiring Remotely in Berlin, DEU
In-Office or Remote
Senior level
Angel or VC Firm • Artificial Intelligence • Blockchain • Web3
The Role
Lead final development and post-launch support for a counseling marketplace: finish launch features, set engineering best practices, transition dev to ops, benchmark infrastructure and roadmap. Implement backend services (TypeScript, Node.js, Firebase), CI/CD for Firebase Functions, and integrations (Twilio, Stripe); provide frontend support with SvelteKit and Tailwind. Potential for extended involvement.
Summary Generated by Built In
LuniNora will operate an innovative online marketplace that monetizes life coaching and counseling in a new way. We are about to launch and are currently working on our technological solutions that make counseling accessible anytime, anywhere. We are creating a world in which everyone can find the right counseling easily, quickly, and fairly.
If you love clean code, enjoy developing creative solutions and want to work on meaningful projects, then you've come to the right place.
Tasks
Support through launch and post launch phase, by:
• Finalizing the development of feature set for launch
• Establishing best practices in team
• Converting the processes from development into operations modus
• Benchmarking IT infrastructure and technical roadmap
Potential of extended involvement in the future
Requirements
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

Skills Required

  • Highly experienced in AI-based software development (preferably Claude Code)
  • TypeScript (advanced)
  • Firebase / GCP ecosystem
  • Node.js / Express
  • REST API design with deep understanding of HTTP, status codes, and error handling
  • OAuth2 and JWT authentication based on Firebase
  • Implementing GitHub-based CI/CD pipelines for Firebase Functions across environments
  • Experience with Twilio integration
  • Experience with Stripe integration
  • SvelteKit v2 (frontend supporting role)
  • Svelte 5 with runes ($state, $derived, $effect)
  • Tailwind CSS and responsive design
  • Familiarity with TypeScript on the frontend
  • Experience with Firebase Admin SDK v12+
  • Knowledge of webhook-driven architectures (Stripe, Twilio webhooks)
  • CORS configuration and cross-origin security aligned with Google Cloud IAM
  • Experience with Mailjet or similar email services
Am I A Good Fit?
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The Company
24 Employees
Year Founded: 2021

What We Do

soonami.io GmbH is a new-generation remote venture builder and accelerator based in Berlin. Their mission is to empower startups to create, build, and scale by leveraging cutting-edge AI and Web 3.0 solutions. They provide a combination of resources, mentorship, funding, and a global network to help builders and founders grow their ventures with speed and precision.

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