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

You will take a leading technical role in preparing the platform for launch and ensuring its continued stability, performance, and scalability throughout the post-launch phase.

• Finalize the development and implementation of key product features required for the initial marketplace launch.

• Support the transition from active development to operational delivery, establishing reliable processes for deployment, maintenance, and ongoing improvements.

• Establish and promote engineering best practices, including clean code standards, maintainable architecture, testing, and efficient development workflows.

• Leverage AI-powered development tools, particularly Claude Code, to accelerate implementation, improve productivity, and maintain high-quality software.

• Design, develop, and maintain backend services and REST APIs using TypeScript, Node.js, and Express.

• Build and manage cloud-based solutions within the Firebase and Google Cloud Platform (GCP) ecosystem.

• Implement secure authentication and authorization mechanisms using Firebase, OAuth 2.0, and JSON Web Tokens (JWT).

• Develop and maintain GitHub-based CI/CD pipelines for Firebase Functions across development, staging, and production environments.

• Integrate and maintain third-party services, including Twilio for communications and Stripe for payment processing.

• Support frontend development and improvements using SvelteKit, Svelte, TypeScript, and Tailwind CSS, ensuring responsive and accessible user experiences.

• Evaluate and benchmark the existing IT infrastructure, identify areas for improvement, and contribute to the technical roadmap.

• Troubleshoot technical issues, improve system reliability, and support ongoing platform optimization after launch.

• Collaborate with team members across product and technical functions, taking ownership of key deliverables and contributing to broader company development initiatives.

Requirements:

The ideal candidate is a technically strong fullstack developer with advanced TypeScript and backend engineering skills, practical experience with cloud-based applications, and a proven ability to use AI coding tools effectively.

• Extensive experience in AI-assisted software development, preferably using Claude Code in real-world development workflows.

• Advanced proficiency in TypeScript, particularly for backend application development.

• Strong experience with Node.js and Express for building and maintaining server-side applications.

• Hands-on experience with Firebase and the Google Cloud Platform ecosystem.

• Deep understanding of REST API design, including HTTP methods, status codes, error handling, and API reliability.

• Experience implementing OAuth 2.0 and JWT-based authentication using Firebase solutions.

• Proven ability to build and maintain GitHub-based CI/CD pipelines for Firebase Functions across multiple environments.

• Experience integrating third-party services such as Stripe and Twilio.

• Familiarity with frontend development using SvelteKit 2, Svelte 5, TypeScript, and Tailwind CSS.

• Understanding of responsive design principles and modern frontend development practices.

• Strong problem-solving skills, attention to detail, and a commitment to clean, maintainable code.

• Ability to work independently, take ownership of technical decisions, and collaborate effectively with an experienced team.

• Interest in contributing to product launches, operational improvements, infrastructure evaluation, and long-term technical planning.

Nice to Have:

• Experience with Firebase Admin SDK version 12 or later, including awareness of breaking changes introduced after version 10.

• Knowledge of webhook-driven architectures, particularly for Stripe and Twilio integrations.

• Familiarity with CORS configuration, cross-origin security, and Google Cloud IAM permissions.

• Experience integrating email delivery services such as Mailjet or similar platforms.

• Proficiency with Svelte 5 runes, including $state, $derived, and $effect.

Benefits:

• Flexible working hours and the possibility of remote or hybrid collaboration.

• Opportunity to work with an experienced team that has already developed successful platforms.

• Significant creative freedom and personal responsibility in shaping technical solutions.

• Direct involvement in product launch activities and the ongoing development of the business.

• Opportunity to influence engineering practices, infrastructure decisions, and the long-term technical roadmap.

• Dynamic, supportive, and appreciative working environment.

• Access to an inspiring professional network of entrepreneurs and industry experts.

• Opportunity to contribute to a meaningful digital platform that aims to make life coaching and counseling more accessible.