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

Jobgether; Brasil; A distancia; BRL 120.000 - 180.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Flexible hours

Remote or hybrid collaboration

Creative freedom and ownership

Descripción de la vacante

Jobgether seeks a Senior Fullstack Developer (m/w/d) to drive AI-assisted development using Claude Code for a Brazil-based online marketplace in life coaching and counseling. You will implement backend APIs with TypeScript/Node.js, secure authentication with Firebase and OAuth, and build scalable cloud integrations on GCP.

Frontend work with Svelte/SvelteKit and Tailwind complements backend efforts. You will prototype and ship features, establish best practices, and prepare the platform for

Formación

• Extensive experience in AI-assisted software development, preferably with Claude Code.
• Advanced proficiency in TypeScript, especially for backend apps.
• Strong Node.js and Express experience for server-side apps.
• Hands-on Firebase and Google Cloud Platform experience.
• Solid REST API design with robust error handling.
• Experience implementing OAuth 2.0 and JWT with Firebase.
• Ability to build and maintain GitHub-based CI/CD for Firebase Functions.
• Experience integrating Stripe and Twilio services.
• Frontend familiarity with SvelteKit 2, Svelte 5, TypeScript, Tailwind CSS.

Responsabilidades

• Finalize key product features for initial marketplace launch.
• Support transition from development to operations with reliable processes.
• Promote engineering best practices including testing and clean code.
• Leverage Claude Code to accelerate implementation.
• Develop and maintain backend REST APIs and cloud-based solutions.
• Implement secure authentication and authorization via Firebase/OAuth/JWT.
• Create and manage CI/CD pipelines for Firebase Functions.
• Integrate Stripe and Twilio for payments and communications.
• Support frontend with SvelteKit, Svelte, and Tailwind CSS.
• Contribute to technical roadmap and platform optimization.

Conocimientos

TypeScript

Node.js

Express

Firebase

Google Cloud Platform

REST API design

OAuth 2.0

JWT authentication

CI/CD pipelines

SvelteKit

Svelte

Tailwind CSS

Claude Code

Herramientas

Firebase

GCP

Stripe

Twilio

GitHub Actions

SvelteKit 2

Descripción del empleo

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Fullstack Developer (m/w/d) - Claude Code Expert based in Brazil.

We are looking for an experienced Senior Fullstack Developer with strong expertise in AI-assisted software development, particularly Claude Code, to support the launch and continued evolution of an innovative online marketplace for life coaching and counseling. You will help finalize essential product features, strengthen development practices, and transition the platform from active development into stable operations. With a strong focus on backend engineering, you will build reliable APIs, secure authentication systems, and scalable cloud-based integrations. You will also contribute to frontend development, infrastructure evaluation, and long-term technical planning. Working alongside an experienced team, you will have the autonomy to introduce best practices, solve complex engineering challenges, and influence important technical decisions. This opportunity is ideal for a proactive developer who values clean code, creative problem-solving, and building technology with a meaningful real-world impact.

Accountabilities:

• 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:

• 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.

• Familiarity 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.

We appreciate your interest and wish you the best!