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 ResponsibilitiesCore Backend DevelopmentBuild high-performance, scalable backend services using Golang to support core AI product featuresDesign, develop, and optimize APIs (RESTful and GraphQL) ensuring efficient frontend-backend interactionsParticipate in system architecture design to ensure stability, reliability, and scalability at enterprise scaleHandle large-scale data flows and optimize distributed systems for peak performanceCollaborate closely with frontend and AI agent teams to support rapid product iteration cyclesWrite clean, maintainable, and well-documented code following industry best practicesInfrastructure Track (Option A)Middleware & Core Systems ManagementMaintain and optimize Manus's foundational middleware stack including databases, caching layers, logging systems, and message queuesDesign and manage Kubernetes cluster architecture for optimal resource utilization and fault toleranceImplement monitoring, alerting, and observability solutions across all infrastructure componentsEnsure high availability and disaster recovery capabilities for mission-critical systemsE2B Cluster OperationsOversee maintenance, configuration, and enhancement of Manus's E2B cluster infrastructureDrive capacity planning and scaling initiatives to meet growing demandImplement cost optimization strategies while maintaining performance standardsCollaborate with DevOps teams to streamline deployment and operational workflowsBusiness Systems Track (Option B)Core Business DevelopmentDevelop and maintain user management systems, authentication, and authorization frameworksBuild integrations with marketing automation platforms and operational toolsCreate robust APIs for customer onboarding, engagement tracking, and lifecycle managementImplement analytics and reporting systems for business intelligencePayment & Monetization PlatformDesign and develop comprehensive payment processing systems with multiple gateway integrationsBuild credit and points management systems with real-time balance trackingImplement coupon, discount, and promotional campaign management featuresDevelop membership and subscription management capabilities with automated billingEnsure PCI compliance and implement fraud detection mechanismsRequired QualificationsBachelor's degree or higher in Computer Science, Software Engineering, or related technical fieldMinimum 3 years of backend development experience with demonstrated expertise in GolangStrong 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 technologiesExperience with CI/CD pipelines and infrastructure-as-code practicesStrong problem-solving abilities and passion for learning new technologiesPreferred QualificationsPrevious experience in backend development for AI, ML, or SaaS productsExperience with payment processing systems, financial transactions, or fintech applicationsKnowledge of infrastructure monitoring tools (Prometheus, Grafana, ELK stack)Familiarity with security best practices and compliance frameworksExperience working in international, distributed teamsContributions to open-source projects or technical community involvementExperience with performance optimization and large-scale system designWhat We OfferOpportunity to work on cutting-edge AI technology with real-world impactChoice between infrastructure and business systems specialization based on your interestsCollaborative, learning-focused environment with opportunities for professional growthAccess to the latest tools, technologies, and professional development resourcesAbout Manus AIManus 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