Principal Software Engineer Salaries in Needham, MA

Participate in all phases of SDLC: from system analysis to technical design and development and test to deployment and support. 5+ years of experience with .

$145,000 - $181,000 a year

Agentic Memory & State: Familiarity with implementing persistent memory and long-term state management for multi-session AI agents.

$120,000 - $180,000 a year

3+ years developing LLM-powered applications in production, including prompt design, RAG/vector search, evaluation frameworks, and performance optimization.

$144,200 - $288,400 a year

Understanding of object-oriented design principles (ex: SOLID) to create maintainable, extensible code and knowledge of design patterns, inheritance hierarchies…

$173,400 - $260,000 a year

Demonstrated ability to own complex systems from design through rollout and post-release operation, with strong attention to quality and reliability.

$200,000 - $240,000 a year

You’ll write code, dive into services, review tough designs, debug messy systems, and directly own the architecture behind some of the most critical surfaces in…

$266,200 - $425,900 a year