Senior Engineer, Full Stack Engineering

28 days ago

Waltham, MA, USA or New York, NY, USASenior

Base Salary

$128k - $192k/yr

Responsibilities

Architect and ship scalable cloud-native applications on AWS, Azure, or GCP using serverless, containerized, event-driven, and microservices architectures.
Build AI and LLM-powered applications with prompt engineering, RAG patterns, agent orchestration, multimodal capabilities, fine-tuning, and model adaptation.
Own full-stack development, including accessible React and React Native interfaces, Django REST and GraphQL APIs, and real-time features using WebRTC, WebSockets, and Server-Sent Events.
Lead technical architecture decisions, code reviews, engineering standards, technical roadmaps, documentation, and deployment practices.
Establish testing strategies covering unit, integration, agent-based, and end-to-end testing.
Create CI/CD pipelines, observability practices, security compliance processes, and cloud authentication patterns.
Lead and mentor engineering teams, contribute to technical culture, and collaborate with product, design, data engineering, and client stakeholders.
Respond to production incidents, conduct post-mortems, and evaluate emerging AI/ML tools and frameworks.

8+ years of experience building production-grade software solutions with demonstrated technical leadership.
Expertise in React, React Native, Redux or Zustand, TypeScript, modern JavaScript, and responsive component libraries.
Expertise building AI applications with LangGraph, LangChain, LlamaIndex, AWS Bedrock, and OpenAI APIs, including token optimization, cost management, and streaming responses.
Expertise in Python, Django, REST and GraphQL API design, asyncio, and FastAPI.
Experience with multimodal AI, fine-tuning, model adaptation, data quality, and AI governance.
Hands-on experience with Docker, containerization, Git, Jenkins, and Artifactory.
Deep experience developing on AWS, Azure, and GCP, including serverless systems, containers, security, IAM, OAuth, JWT, and SSO.
Experience with relational databases, NoSQL databases, semantic databases, schema design, and query optimization.
Proficiency with Jest, Pytest, Selenium, Webpack, Vite, Git workflows, and trunk-based development.
Experience with monitoring and logging tools including CloudWatch, Sentry, and Langfuse.
Clear communication, initiative, follow-through, and collaborative problem-solving skills.
Preferred qualifications include a life sciences background, cloud or AI developer certifications, production AI feature delivery, LLM and AI agent development, open-source contributions, PWA development, and edge computing optimization.

Full-time hybrid position based in Waltham, MA; New York, NY; or Princeton, NJ.
Base salary range of $128,000–$192,000 per year, plus eligibility for an annual discretionary performance bonus.
Inclusive workplace commitment supporting collaboration, belonging, and equal opportunity.

1,001-5,000 employees