Top Senior Full-Stack Engineer Jobs in Boston, MA

Build end-to-end data and analytics features: ingest and model data, build transformations and pipelines, create client-facing dashboards and interfaces, and develop LLM-powered workflows to accelerate analysis and app development. Partner with stakeholders, perform exploratory analyses, and ensure data quality, observability, and maintainability while influencing data engineering strategy.

Lead and contribute to an agile scrum team to deliver scalable web application features within sprints. Complete user stories, troubleshoot issues, design and implement complex software solutions, mentor developers, and maintain system architecture, SDLC adherence, and technical documentation. Must meet DHS EOD and fitness requirements.

Lead and deliver scalable full‑stack systems and APIs for a new ads operating system. Architect solutions, mentor engineers, conduct code and spec reviews, collaborate with Product/Design/Data Science, reduce technical debt, optimize performance, and drive large modernization and integration projects for programmatic advertising.

The role involves building web applications and APIs for blockchain-based investment products, optimizing front-end performance, and collaborating cross-functionally while maintaining technical excellence.

Design, implement, and deliver high-quality, performant frontend interfaces. Collaborate with cross-functional teams, optimize for SEO and user experience, and mentor junior engineers.

The Senior Frontend Engineer will enhance Slate's brand management experience by building UI systems, integrating brand assets, ensuring reliability, writing maintainable code, and mentoring junior engineers.

The Senior Backend Engineer will design and build backend systems for real-time collaboration, focusing on performance, reliability, and team workflows while improving existing infrastructure and contributing to architectural decisions.

As a Senior Full-Stack Engineer, lead development of secure AI-driven SaaS applications, focusing on backend architecture, frontend design, and AI integrations. Collaborate with teams to operationalize models and enhance application functionality through cutting-edge AI solutions.

The Senior Full Stack Developer will build end-to-end solutions, collaborate in a remote environment, and write technical documentation. The role requires expertise in Ruby on Rails and various programming paradigms.

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.

Build end-to-end features in a JS/TS stack, designing scalable backend services and responsive real-time frontends. Improve observability, performance, and reliability, collaborate with product/design, and own full-stack implementation from APIs and data models to UI.

The Senior Full Stack Engineer will develop backend services in .NET, build frontend applications in React, and optimize databases while managing cloud-native infrastructures.

Lead design and implementation of secure, cloud-first enterprise architectures focused on IAM and Zero Trust. Develop full-stack applications, optimize app/database performance, integrate secure APIs, collaborate with engineering and DevSecOps, assess risks and tradeoffs, drive identity modernization and cloud modernization, and mentor software developers while promoting security and engineering best practices.

Design and implement full-stack applications for GenAI, build developer tooling, collaborate with product teams, and enhance AI agent delivery.

Design and build agent-powered mission consoles, collaborate with stakeholders to improve user workflows, and maintain agentic workflows for mission outcomes.

As a Senior Software Engineer, you will design and build a cutting-edge identity search platform and implement AI systems for defense applications, working closely with cross-functional teams to enhance user workflows and support national security.

Build and maintain core platform features, expand Infisical PKI/SSH/KMS product lines, collaborate with CTO and engineers, communicate with enterprise customers, and prototype AI applications for secrets management.

Responsible for defining and building user experiences across the full stack, leading both frontend and backend architecture, mentoring engineers, and ensuring product scalability.

As a Senior Fullstack Engineer, you will enhance products for hotel distribution, architect scalable solutions, and mentor team members. You'll work with PHP and JavaScript frameworks, focusing on performance and security while collaborating across teams to deliver high-quality features.

Design, develop, test, and maintain full-stack applications using Angular, TypeScript, Node.js/NestJS; build and integrate RESTful APIs; support ETL and data processing with Python/PySpark; collaborate in SAFe Agile with architects, QA, and DevOps; maintain CI/CD, documentation, and federal compliance; mentor developers and help modernize large-scale federal health IT systems.

The Senior Frontend Engineer will enhance user productivity by developing a scalable collaboration platform, optimizing app performance, and leading feature design and implementation.

As an Operations Reliability Engineer, design and implement automations to eliminate manual tasks in brokerage operations, focusing on efficiency and reliability while collaborating with cross-functional teams.

As a Senior Full Stack Engineer, you'll design and develop custom Shopify applications, integrate solutions, and collaborate with clients to meet their needs.

As a Senior Fullstack Developer, you will build and maintain moderation and user-safety applications for Bluesky's Trust & Safety team, collaborating with product teams and improving tools based on user feedback.

As a Senior Full Stack Engineer, you'll own major features, build across the stack, influence architecture, and ensure security while working closely with a small team.