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Senior Fullstack Engineer

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Senior Fullstack Engineer in USA

  • LangChain
  • Full time
  • Email
  • Boston, MA

Responsibilities

  • Lead the technical architecture and implementation of key LangSmith product features across the Go, Python, and TypeScript stack.
  • Collaborate with product and design teams to iterate on new features.
  • Drive aggressive project timelines while maintaining high engineering standards.
  • Write clean, maintainable, and well-tested code.
  • Engage with enterprise customers, developer end-users, and cross-functional internal stakeholders.

Requirements

  • At least 5 years of software engineering experience working on complex platform products.
  • Full-stack engineering experience with Go or Python on the backend and React with TypeScript on the frontend.
  • Strong understanding of database systems, particularly Postgres and Redis.
  • Experience designing and scaling APIs, preferably in high-performance, data-intensive applications.
  • Ability to ship quickly, iterate based on user feedback, communicate effectively, collaborate with stakeholders, and take ownership.
  • Experience with AI/LLM-powered applications, developer tools, or observability platforms is a bonus.

Benefits

  • Medical, dental, and vision coverage.
  • Flexible vacation.
  • 401(k) plan.
  • Meals on in-office days in the US.
  • Onsite work five days per week in Boston, MA.

Salary: $175k - $240k/yr

LangChain

At LangChain, our mission is to make intelligent agents ubiquitous. We build the foundation for agent engineering in the real world, helping developers move from prototypes to production-ready AI agents that teams can rely on. What began as widely adopted open-source tools has grown into a platfo...

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