Full Time Senior Backend Developer (Node.js) - Worldwide/Remote

Location: Remote (Worldwide) Type: Permanent Full-Time (40h/week) About the Role: We're looking for a senior-level backend engineer who can take ownership of a production application and its underlying infrastructure. You'll be working on an existing next.js application, maintaining and extending core functionality, improving architecture, and leading the migration from a Vercel-hosted environment to infrastructure that we control. We need an engineer who understands system architecture, can design scalable solutions, make sound technical decisions, and take responsibility for the long-term health of a product. What You'll Do: - Design and implement backend systems and services. - Maintain and enhance an existing production application. - Plan and execute migration from third-party hosting to our own infrastructure. - Design scalable, secure, and maintainable system architecture. - Review existing code and identify opportunities for improvement. - Lead technical decisions around infrastructure, deployment, security, and performance. - Build new features while ensuring long-term maintainability. - Troubleshoot and resolve complex production issues. What We're Looking For: - Strong expertise in Node.js and backend application development. - Proven experience designing and operating production systems. - Strong understanding of software architecture and system design. - Experience with relational databases such as PostgreSQL. - Experience working with cloud infrastructure and storage services (AWS S3 or similar). - Strong understanding of web security best practices. - Ability to work independently and take ownership of technical outcomes. - Experience planning and executing infrastructure or platform migrations. - Able to evaluate trade-offs and make pragmatic engineering decisions. Current Technology Stack: The existing application currently uses: Next.js PostgreSQL Prisma AWS S3 React Vercel Experience with every framework listed above is not required. We care more about your ability to understand existing systems, improve them, and make sound architectural decisions. Bonus Points: - Experience migrating applications away from managed platforms. - Experience with Docker, CI/CD, and self-hosted infrastructure. - Experience scaling SaaS applications. - Previous technical leadership or architecture responsibilities.