Senior Full-Stack Javascript Developer
As part of our interview process and our commitment to building high-performing teams, we’ve partnered with The Culture Index Program to better understand work styles and team dynamics. To support this process, we kindly ask you to complete a brief survey as part of the application process when submitting your profile. It should take no more than 7 minutes, and there are no right or wrong answers. We appreciate your participation and look forward to learning more about how you might fit within our team! Culture Index Survey: https://go.cultureindex.com/p/weJLJlIGZ2DauZkoW Collectivus Holdings guides many of the most prestigious brands in the Collecting, Trading Card Game, and Hobby industries. With a century's worth of collective experience in driving product and service innovation, high-end quality standards, and elevated customer experience, Collectivus brands are among the most recognized and loved throughout the world by the communities they serve. Website: https://www.collectivusholdings.com Locations: Aarhus – Dallas – Delhi – Lisbon – Nashville – Worldwide Title: Senior Full-Stack JavaScript Developer (Node.js / NestJS / Next.js) Job Location: Remote - US We are seeking a Senior Full-Stack JavaScript Developer (Node.js / NestJS / Next.js) to take technical ownership of both backend and frontend architecture. This role focuses on building and maintaining scalable, secure, and high-performance web applications using Node.js, NestJS, and Next.js. You will work with a high degree of autonomy, collaborate closely with product, frontend, and infrastructure teams, and help set engineering standards while mentoring junior developers. Key Responsibilities: - Design, develop, and maintain backend services using Node.js, NestJS, and TypeScript - Build, document, and optimize RESTful APIs and integrate third-party services - Develop and maintain frontend applications using Next.js - Design and optimize PostgreSQL schemas, queries, and migrations - Define and maintain API contracts between frontend and backend systems - Ensure platform security, performance, scalability, and reliability - Conduct code reviews, enforce best practices, and mentor junior developers - Participate in system architecture decisions and technical design discussions - Troubleshoot, debug, and resolve production issues - Manage deployments and support applications on Linux/Ubuntu server - Maintain technical documentation and source control using Git/Bitbucket Qualifications: - 5+ years of professional experience with Node.js - Strong hands-on experience with NestJS and TypeScript - Solid experience building frontend applications with Next.js - Strong understanding of HTTP, authentication, sessions, and web security best practices - Hands-on experience with PostgreSQL, including schema design and query optimization - Proven experience building and maintaining production-grade APIs - Comfortable working in Linux/Ubuntu environments - Strong knowledge of Git workflows, debugging, and testing - Ability to work independently and take end-to-end technical ownership - Strong problem-solving skills and attention to detail Nice to Have (Optional): - Experience with containerization (Docker) and CI/CD pipelines - Familiarity with cloud platforms (AWS, GCP, or Azure) - Experience with background jobs, queues, or event-driven systems - Exposure to monitoring, logging, and observability tools - Prior experience mentoring or leading small engineering teams #LI-Remote