Full Stack Developer (Javascript)

Description

Job Summary: We are seeking a Full Stack Developer (Javascript) to develop and enhance our digital products with scalable, high-quality code, adding value to the user experience. Key Highlights: 1. Development of new features and optimization of web applications and APIs 2. Participation in technical decision-making and collaboration within an agile (Scrum) team 3. Opportunity for continuous learning and professional development **At Musky, we support people and their pets by creating an environment where everything needed for a healthy and happy life can be found.** Backed by GCO Ventures, we are building a digital insurance solution that simplifies pet care—from reimbursement coverage to full access to medical records—offering an online ecosystem to improve the quality of life for pets and their guardians. We are looking for someone to join Musky as a **Full Stack Developer (Javascript)** to develop and enhance our digital products with scalable, high-quality code, adding value to the user experience in a rapidly growing environment. ### **Responsibilities** * Develop new features for web applications and APIs related to customer, pet, and policy management. * Optimize existing features, ensuring code quality and scalability in a continuously growing environment. * Apply sound development practices to ensure maintainable code, working within a modern architecture. * Participate in technical decision-making, coordinating with our CTO and Team Lead. * Share information and collaborate with other team members, following agile (Scrum) methodologies. * **Our tech stack:** + Backend: NodeJS / Fastify / MongoDB + Frontend: Vue.js / Nuxt + Cloud: Azure ### **Requirements** * 3+ years of end-to-end software development experience (backend and frontend), ideally in startup or scale-up environments. * Experience programming in Javascript, HTML, and CSS (intermediate to advanced level) * **Backend Knowledge:** + NodeJS / Fastify / Express (or other Node.js frameworks) + Essential MongoDB knowledge (connectivity via Mongoose) - Interpretation/modification of data schemas - CRUD operations * **Frontend Knowledge:** + VueJS / Nuxt (or equivalent frameworks such as React or Svelte) + Data communication between components + State management + Interaction with REST APIs + CSS flexbox / grid / BEM methodology (optional) + Mobile-first coding for responsive development * Experience using Git. * Team-oriented mindset, adhering to Agile (Scrum) principles. * Experience with AI-powered development tools (Cursor, Claude Code, Codex, etc.) * Motivation for professional growth, with enthusiasm for continuous learning and readiness to take on new responsibilities. * Advanced proficiency in Spanish and English (ability to read technical documentation and participate in written code reviews in English). **Especially valued:** * Azure expertise (particularly App Services), monitoring and tracking tools, etc., or equivalent cloud platforms (GCP, AWS). * Intermediate/advanced MongoDB knowledge. * Experience with Jira, Figma, or other project management tools. ### **Benefits** * Join an ambitious and collaborative project and team * Flexible work mode and schedule (3 days onsite, 2 days flexible) * 28 vacation days * Offices located in central Barcelona *We are committed to building a diverse, inclusive, and authentic team. If you're excited about this role but your experience doesn't meet all the requirements, we still encourage you to apply.*