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BOSTON, MA! Senior Backend Developer – 4 days/week onsite
Boston, MA Ongoing contract Interview Process: Round 1: Zoom (virtual) Round 2: On-site (in person) Work Model: Hybrid – 4 days per week onsite About the Role We are seeking a Senior Backend Developer to join a high-impact AI / LLM work stream . This role is designed for a strong individual contributor who thrives in complex backend environments and enjoys building scalable, high-performance systems. You will play a key role in architecting and optimizing event-driven microservices while integrating AI, chatbots, and Large Language Models (LLMs) into production-grade backend platforms. Key Responsibilities Architect and build modular, event-driven microservices using Java and Node.js Design and operate scalable systems on AWS , leveraging services such as SNS, SQS, Lambda, ECS, and Batch Drive performance optimization , profiling, fine-tuning, and production quality gates Integrate AI capabilities , including chatbots and LLMs , into backend services Ensure system reliability, scalability, and maintainability in production environments Collaborate closely with engineering, platform, and product teams in a fast-paced setting Required Qualifications 8+ years of backend development experience with Java and Node.js Strong system design expertise in distributed and microservices architectures Hands-on experience designing and deploying systems on AWS Deep understanding of event-driven architectures Proven experience improving performance, scalability, and reliability of backend systems Strong problem-solving skills and ability to operate as a senior individual contributor Preferred Qualifications Hands-on experience with AI, chatbots, LLMs, or model integrations Exposure to building intelligent, data-driven backend services at scale Why Join Work on cutting-edge AI and LLM initiatives Own critical backend architecture and performance decisions Collaborate with senior-level engineers in a modern, cloud-native environment High visibility role with real production impact
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