Top Senior Full-Stack Engineer Jobs in Boston, MA

Deliver and scale full‑stack product features end-to-end: design and implement frontend and backend systems, align architecture, collaborate with product/design/data/QA, estimate work, ensure SDLC quality, communicate status, and participate in on-call rotation.

Lead architecture and implementation of scalable web applications using NestJS and Next.js. Build and optimize PostgreSQL schemas and queries, implement responsive UIs with Tailwind CSS, integrate LangChain-driven AI features, manage authentication with Clerk, and create end-to-end tests and automation with Puppeteer to ensure launch readiness and reliable user experiences.

The Senior Full-Stack Engineer at SafeRide Health will develop and maintain healthcare applications, ensuring high performance and security while collaborating with cross-functional teams in an agile setting.

Lead modernization of dtn.com as a senior full-stack engineer—improving architecture, performance, accessibility, and integrations. Build responsive front-end experiences and back-end APIs, integrate CMS/CRM/analytics, optimize conversion and SEO, and establish engineering best practices to support marketing, content, and demand-generation goals.

The Senior Full Stack Engineer will build platform integrations, work across the full stack, shape product architecture, and collaborate cross-functionally to enhance digital experiences.

The Senior Full Stack Developer will develop web applications, facilitate Scrum ceremonies, guide agile practices, and drive project goals.

The role involves building and operating core services for authentication and data privacy, owning projects end-to-end, and enhancing system reliability.

The Senior Fullstack Engineer will build foundational product features and integrations to drive user acquisition, optimization, and monetization at LangChain, collaborating with various teams for growth.

Lead the technical architecture and implementation for LangSmith, collaborating with teams, mentoring juniors, and ensuring code quality.

As a Senior Software Engineer, you'll implement collaboration features, support team architecture, work across tech stacks, and improve developer experience.

As a Senior Software Engineer, you'll design, develop, and maintain full-stack applications, utilizing TypeScript and modern frameworks while collaborating cross-functionally to enhance user experience and performance.

Lead design and implementation of cloud-first, AI-integrated full-stack applications on GCP. Drive rapid prototyping and MVPs, mentor developers, define architecture, maintain CI/CD pipelines, and collaborate cross-functionally to deliver production-ready solutions.

Lead development initiatives for SaaS products, focusing on backend architecture, frontend design, and AI/ML integrations, especially generative AI technologies.

The Senior Full Stack Engineer will lead quality assurance strategies, develop automation frameworks, mentor engineers, and contribute to full-stack development while leveraging AI in testing.

The Senior Full-Stack Engineer will develop and ship features across frontend and backend systems, work with various frameworks and databases, write specifications, and improve development processes.

As a Senior Fullstack Engineer, you'll develop end-to-end features for Cart & Checkout, collaborating with cross-functional teams. You will design full-stack solutions and ensure quality through documentation and monitoring, while also mentoring junior engineers and optimizing systems for performance.

Build and scale full-stack web applications using TypeScript and React, manage CI/CD and cloud infrastructure with IaC, automate deployments, collaborate cross-functionally, use AI tools to accelerate delivery, and uphold code quality, reliability, and security.

Lead development of a passwordless, zero-trust platform using C++. Own complex, multithreaded systems, build CI/CD pipelines, write unit tests, perform Linux administration, apply image-processing with OpenCV, and use Python for scripting and integration. Collaborate in a fast-paced environment and mentor engineers.

Own and scale backend systems end-to-end: design, build, and deploy performant APIs and services on AWS using Node/TypeScript. Make architectural tradeoffs, ship production code frequently, establish engineering best practices, and collaborate with product teams while leveraging AI-assisted development.

The role involves designing and building EHR integrations, developing APIs, and ensuring compliance with health data regulations. Requires collaboration with various teams to implement healthcare workflows.

Design, build, and scale data integrations for healthcare systems, collaborating with teams and enhancing functionality while ensuring security and quality.

The Senior Full Stack Engineer will develop banking and investment systems, balancing business and technical needs while collaborating and maintaining the full lifecycle of Autopilot technology.

The Senior Full Stack Engineer will lead Partnerships & Martech projects, optimizing workflows and building tools using Node, TypeScript, React, and GraphQL while collaborating with stakeholders to enhance user experience and operational efficiency.

As a Senior Fullstack Engineer, you'll develop and maintain scalable APIs and web applications, engage with customers to meet their needs, and collaborate on product features to improve Layer Health's applications.

As a Senior Full Stack Engineer, you'll design and build high-performance web applications, manage end-to-end solutions, and collaborate with teams to enhance user experiences.