Sr. Java Backend Developer - only locals to Boston, MA

Job Description

No Corp - to - Corp

No third party vendors

ONLY LOCALS to 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