Sr. Java Backend Developer - locals to Boston, MA

Sr. Java Backend Developer – Boston, MA

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.

• Round 1:
  Zoom (virtual)
• Round 2:
  On-site (in person)

Ongoing contract, 4 days/week onsite.

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.

• 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

• 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

• Hands‑on experience with AI, chatbots, LLMs, or model integrations
• Exposure to building intelligent, data‑driven backend services at scale

• 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

Mid‑Senior level

Contract

Design, Analyst, and Management

Insurance

Boston, MA – $125,000 - $178,000