Backend Engineer

We're seeking a skilled Backend Engineer to join our growing team and drive the development of Manus's core infrastructure and business systems. This role offers the opportunity to work across two specialized tracks: infrastructure engineering and business application development, allowing you to shape both the technical foundation and user-facing features of our AI-powered platform. Key Responsibilities Core Backend Development - Build high-performance, scalable backend services using Golang to support core AI product features - Design, develop, and optimize APIs (RESTful and GraphQL) ensuring efficient frontend-backend interactions - Participate in system architecture design to ensure stability, reliability, and scalability at enterprise scale - Handle large-scale data flows and optimize distributed systems for peak performance - Collaborate closely with frontend and AI agent teams to support rapid product iteration cycles - Write clean, maintainable, and well-documented code following industry best practices Infrastructure Track (Option A) Middleware & Core Systems Management - Maintain and optimize Manus's foundational middleware stack including databases, caching layers, logging systems, and message queues - Design and manage Kubernetes cluster architecture for optimal resource utilization and fault tolerance - Implement monitoring, alerting, and observability solutions across all infrastructure components - Ensure high availability and disaster recovery capabilities for mission-critical systems E2B Cluster Operations - Oversee maintenance, configuration, and enhancement of Manus's E2B cluster infrastructure - Drive capacity planning and scaling initiatives to meet growing demand - Implement cost optimization strategies while maintaining performance standards - Collaborate with DevOps teams to streamline deployment and operational workflows Business Systems Track (Option B) Core Business Development - Develop and maintain user management systems, authentication, and authorization frameworks - Build integrations with marketing automation platforms and operational tools - Create robust APIs for customer onboarding, engagement tracking, and lifecycle management - Implement analytics and reporting systems for business intelligence Payment & Monetization Platform - Design and develop comprehensive payment processing systems with multiple gateway integrations - Build credit and points management systems with real-time balance tracking - Implement coupon, discount, and promotional campaign management features - Develop membership and subscription management capabilities with automated billing - Ensure PCI compliance and implement fraud detection mechanisms Required Qualifications - Bachelor's degree or higher in Computer Science, Software Engineering, or related technical field - Minimum 3 years of backend development experience with demonstrated expertise in Golang - Strong understanding of microservices architecture and service orchestration tools (gRPC, Kubernetes) - Proficiency in database design, optimization, and management (MySQL, PostgreSQL, MongoDB) - Hands-on experience with distributed systems, message queues (Kafka, RabbitMQ), and caching technologies (Redis) - Solid understanding of cloud platforms (AWS, GCP, or Azure) and containerization technologies - Experience with CI/CD pipelines and infrastructure-as-code practices - Strong problem-solving abilities and passion for learning new technologies Preferred Qualifications - Previous experience in backend development for AI, ML, or SaaS products - Experience with payment processing systems, financial transactions, or fintech applications - Knowledge of infrastructure monitoring tools (Prometheus, Grafana, ELK stack) - Familiarity with security best practices and compliance frameworks - Experience working in international, distributed teams - Contributions to open-source projects or technical community involvement - Experience with performance optimization and large-scale system design What We Offer - Opportunity to work on cutting-edge AI technology with real-world impact - Choice between infrastructure and business systems specialization based on your interests - Collaborative, learning-focused environment with opportunities for professional growth - Access to the latest tools, technologies, and professional development resources About Manus AI Manus is a general AI agent that bridges minds and actions: it doesn't just think, it delivers results. Manus excels at various tasks in work and life, getting everything done while you rest. At Manus AI, we offer a highly collaborative and innovative environment where experts across engineering, research, and business come together to push the boundaries of AI applications. If you're passionate about cutting-edge technology and making a real impact, we’d love to hear from you! Contact us: recruiting@manus.im