Senior Full Stack JavaScript Engineer

This position is posted by Jobgether on behalf of a partner company. We are currently looking for a Senior Full Stack JavaScript Engineer in Bulgaria. In this role, you will take ownership of both frontend and backend systems, building scalable, high-performing web and mobile applications. You will collaborate with product and design teams to deliver seamless user experiences while maintaining robust, resilient backend services. The position offers the chance to explore AI-powered features, modern web technologies, and cloud infrastructure in a fast-paced, fully remote environment. You will be instrumental in shaping the product’s technical foundation and mentoring junior engineers, ensuring best practices across the full stack. This is an ideal opportunity for engineers who enjoy combining technical craftsmanship with creative problem-solving and product impact. You will work in a collaborative team that values innovation, efficiency, and delivering measurable outcomes to end users. Accountabilities Design, build, and maintain full stack applications using React, React Native, Node.js, and GraphQL. Implement scalable backend services, APIs, and microservices, ensuring performance, security, and maintainability. Contribute to frontend UI development, creating intuitive, pixel-perfect experiences for Web, iOS, and Android. Explore and implement AI-powered features using tools such as OpenAI or Gemini APIs. Collaborate with cross-functional teams, including product, design, and infrastructure, to deliver end-to-end solutions. Maintain code quality, testing standards, and performance benchmarks across all layers of the stack. Mentor junior engineers, sharing best practices and fostering innovation across the team. Requirements 5+ years of professional JavaScript development experience with strong expertise in React, React Native, Node.js, and TypeScript. Proven experience in full stack development, delivering both frontend and backend solutions. Proficiency in GraphQL and familiarity with microservices architecture. Exposure to AI-powered tools or projects, either commercially or personally. Product-minded approach, understanding how technical decisions impact user experience and business outcomes. Strong problem-solving, communication, and collaboration skills. Bonus: experience with AWS, DevOps (CI/CD, monitoring, deployment pipelines), AI model implementation, or UX/UI design intuition. Benefits Fully remote, flexible work environment with global collaboration. Opportunities for professional growth through coaching, training, and conferences. 24 paid vacation days + 10 “Celebration Leave” days. Paid parental leave. Tech gear budget to support productivity. Exposure to cutting-edge AI tools and full stack engineering practices. Participation in global team gatherings for networking and collaboration. Why Apply Through Jobgether? We use an AI-powered matching process to ensure your application is reviewed quickly, objectively, and fairly against the role's core requirements. Our system identifies the top-fitting candidates, and this shortlist is then shared directly with the hiring company. The final decision and next steps (interviews, assessments) are managed by their internal team. We appreciate your interest and wish you the best Why Apply Through Jobgether? Data Privacy Notice: By submitting your application, you acknowledge that Jobgether will process your personal data to evaluate your candidacy and share relevant information with the hiring employer. This processing is based on legitimate interest and pre-contractual measures under applicable data protection laws (including GDPR). You may exercise your rights (access, rectification, erasure, objection) at any time. #J-18808-Ljbffr