Senior Software Engineer (Java)

Fusemachines is a global provider of enterprise AI products and services, on a mission to democratize AI. The Senior Software Engineer will build and operate high-performance backend services using Java, collaborating with various teams to deliver reliable production solutions.

Responsibilities:

• Design, build, test, and maintain scalable backend services using Java
• Develop APIs, microservices, and event-driven components for high-volume production systems
• Apply established Java architecture patterns, coding standards, and engineering best practices
• Integrate backend applications with machine learning models, inference endpoints, and feature stores
• Design reliable model-calling workflows with appropriate timeouts, retries, validation, and fallback behavior
• Build highly available, low-latency services that meet defined SLAs and service-level objectives
• Monitor and optimize latency, throughput, availability, resource utilization, and error rates
• Implement resilience patterns such as caching, circuit breakers, rate limiting, and graceful degradation
• Develop unit, integration, contract, performance, and end-to-end tests
• Implement logging, metrics, dashboards, distributed tracing, and actionable alerts
• Use platforms such as Datadog or similar tools to monitor systems and investigate production issues
• Participate in incident response, root-cause analysis, and reliability improvements
• Use AI-assisted coding tools responsibly to support development, testing, documentation, and debugging
• Participate in architecture discussions, technical design reviews, and code reviews
• Communicate technical decisions, risks, dependencies, and tradeoffs clearly to technical and nontechnical stakeholders
• Promote strong software engineering practices across the team

Requirements:

• Strong professional experience developing production applications with Java
• Experience designing backend services, APIs, microservices, or distributed systems
• Strong understanding of Java design patterns, object-oriented programming, and software architecture
• Experience building systems with demanding availability, scalability, throughput, or latency requirements
• Experience with automated testing and continuous integration and delivery practices
• Experience with relational or non-relational databases
• Experience implementing production logging, monitoring, metrics, tracing, and alerting
• Familiarity with Datadog, OpenTelemetry, Grafana, Prometheus, New Relic, or comparable platforms
• Understanding of SLAs, service-level indicators, service-level objectives, and production reliability
• Familiarity with cloud platforms, containers, and modern deployment environments
• Basic understanding of machine learning concepts and how applications interact with deployed models
• Strong troubleshooting, problem-solving, and production support skills
• Excellent written and verbal communication skills
• Experience integrating applications with machine learning inference services or feature stores
• Experience with low-latency or real-time decisioning systems
• Experience with Kafka, message queues, streaming platforms, or event-driven architectures
• Experience with Kubernetes, Redis, distributed caching, or performance testing
• Familiarity with model versioning, feature freshness, prediction logging, and controlled model rollouts
• Experience in advertising technology, digital marketplaces, auction systems, recommendation systems, or personalization
• Experience using AI-assisted development tools such as GitHub Copilot, Claude Code, or Cursor