Top Senior Full-Stack Engineer Jobs in Boston, MA

Build and scale WHOOP AI platform systems and member-facing experiences across the frontend and backend. Design scalable web applications, APIs, and intuitive interfaces; contribute to agent orchestration architecture; translate business requirements into reliable solutions; write tested code; and monitor, debug, and improve production performance and stability. Collaborate with product managers, designers, data scientists, and other cross-functional partners in a fast-paced environment.

Build and maintain scalable APIs and web applications across the full stack. Own end-to-end development of customer-facing and internal product features, collaborate cross-functionally, engage with customers, and help create secure, performant applications for healthcare environments.

Develop and maintain a large-scale production web application across UI and API tiers. Responsibilities include implementing frontend enhancements, fixing bugs, improving accessibility and performance, developing Python-based APIs, supporting third-party integrations and batch processing, enhancing search and administrative features, migrating legacy data, and ensuring application scalability, security, and reliability across multiple releases.

Build and scale a mortgage technology platform across Rails APIs, TypeScript and Node.js services, GraphQL, and React. Own third-party integrations, asynchronous workflows, multi-tenant security, observability, CI/CD, incident response, and technical design. Improve architecture and developer experience, mentor engineers, partner with product and customer success, and lead responsible AI-assisted development and shared AI tooling.

Own and develop a TypeScript monorepo spanning Next.js, Expo, and Cloudflare Worker applications. Build PostgreSQL and Prisma data models, webhook and background job systems, secure financial-data and authentication flows, and AI features using LLM tool-calling. Handle production ownership, on-call responsibilities, incident analysis, code review, and reliability improvements. Collaborate remotely with strong written and verbal English while maintaining security, performance, and data integrity.

Build enterprise workforce management software for forecasting, staffing, scheduling, adherence, intraday management, and operational reporting. Develop Java and Spring Boot microservices, React and TypeScript applications, REST APIs, event-driven workflows, PostgreSQL data models, integrations, and cloud-native deployments. Support CI/CD, production troubleshooting, performance optimization, architecture discussions, code reviews, and stakeholder collaboration across product, QA, DevOps, UX, and operations.

Build enterprise-scale workforce management software for forecasting, capacity planning, scheduling, adherence, intraday management, and reporting. Develop Java and Spring Boot microservices, React and TypeScript applications, REST APIs, event-driven workflows, database models, integrations, and cloud-native deployments. Support CI/CD, performance optimization, production troubleshooting, architecture discussions, and client-facing collaboration. Apply workforce management expertise, complex business rules, scheduling algorithms, and high-volume operational data experience.

Own and develop a TypeScript monorepo spanning Next.js, Expo, and Cloudflare Worker applications. Build secure PostgreSQL and Prisma systems, webhook handlers, background jobs, authentication, encrypted financial data workflows, and AI-powered financial features. Responsibilities include production ownership, incident response, code review, and ensuring reliability, security, idempotency, and data isolation across web and mobile products.

Develop and support enterprise full-stack applications using React, Java/Spring Boot, and Python. Build secure APIs, microservices, integrations, chatbot interfaces, and cloud-native solutions. Deploy applications using Azure or AWS, Docker, Kubernetes, and CI/CD pipelines. Participate in architecture discussions, agile ceremonies, testing, code reviews, and security and compliance practices. The role requires production chatbot UI experience and collaboration with product, architecture, platform, and business teams.

Build and maintain payment infrastructure for an online marketplace, including payment flows, banking integrations, internal ledgers, and financial record-keeping systems. The role focuses primarily on backend development in Python, with additional web and mobile frontend work using React. Engineers will support high-value transfers, new financial products, and collaborate within a small payments team.

Build and operate full-stack internal web applications and conversational AI bots using React, TypeScript, Node.js, Elasticsearch, Kibana, LLMs, RAG, and vector search. Responsibilities include technical design, development, testing, CI/CD deployment, feature flag management, production operations, and on-call support. The role also involves replacing legacy SaaS tools, integrating Elastic Stack capabilities, and using AI coding assistants to accelerate delivery.

Develop and support a multi-tenant operational platform for alternative investment managers. Build frontend features, backend services, APIs, data-ingestion workflows, validation, scheduled jobs, database migrations, audit trails, access controls, and automated tests. Investigate production issues, improve reliability, support customer deployments, participate in code reviews and releases, and coordinate with technical and DevOps teams on installations and upgrades.

Build and scale foundational services, APIs, pipelines, and distributed systems for an AI-powered SMS marketing platform. Own backend systems, improve scalability, reliability, modularity, and observability, and collaborate with engineering, data, product, and go-to-market teams. Use AI-first development practices, contribute to AI integration strategy, reduce technical debt, and support high-scale customer workloads across AWS and Kubernetes.

Build and scale highly available applications and services for Mux’s video platform. Develop customer-facing features across Elixir and Go backend services and React frontend applications, including billing, usage, identity, account management, webhooks, and alerting. Collaborate on technical roadmaps while solving distributed systems, concurrency, scheduling, scaling, and platform resilience challenges. Deploy complex applications using cloud platforms and Kubernetes.

Build and scale full-stack platform services for user onboarding, identity management, privacy controls, and secure public-safety workflows. Develop React applications, Node.js APIs, database models, and complex SQL queries. Containerize applications with Docker, deploy Kubernetes microservices using Helm, and leverage AWS services including S3, API Gateway, and SQS. Solve authentication, authorization, performance, and data-security challenges while shaping foundational platform architecture.

Lead full-stack development for secure, scalable mission planning and command-and-control software supporting space communications programs. Build frontend interfaces and backend services, design APIs, translate mockups into applications, conduct code reviews, improve quality and security, and mentor junior engineers. Work with modern web frameworks, containerized microservices, and highly secure government environments while owning technical problems end to end.

Develop and maintain scalable cloud applications powering a robotic fleet. Responsibilities include building web interfaces, APIs, telemetry and logging systems, dashboards, secure robot-cloud communications, cloud infrastructure, monitoring, troubleshooting, architecture, code reviews, and technical documentation. The role collaborates with embedded, AI/ML, and business teams to deliver reliable robotics software.

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.

Own Hercules’ full data stack, including ETL from third-party providers into BigQuery, data modeling with dbt and medallion architecture, semantic-layer metric definition, and self-service business intelligence in Omni. Build reliable, maintainable systems and dashboards while applying strong software architecture, API design, code quality, and AI-assisted development practices.

Design, build, and maintain AI-powered B2B SaaS products across frontend, backend, and AI. Own projects end-to-end, collaborate with product and design, ensure maintainability, mentor teammates, and inform roadmap and implementation decisions.

The Senior Fullstack Software Engineer will design, implement, and maintain features for Conveyor's SaaS platform, involving both backend and frontend work, while collaborating closely with team members and mentoring juniors.

Build and evolve Humana’s NBA Action Library and Command Center using React, TypeScript, Node.js, PostgreSQL, and Kafka. Develop accessible front-end experiences, REST APIs, data models, integrations, automated tests, and reliable state-driven workflows. Collaborate with product, design, and platform teams to deliver secure, scalable software supporting action creation, governance, versioning, preview, and publishing.

Build and maintain full-stack features for a security infrastructure platform, expand PKI, PAM, and KMS products, work directly with enterprise customers, and explore AI applications in secrets management. The role requires strong JavaScript ecosystem expertise, particularly React, Node.js, and TypeScript, with optional Go and developer tools experience. This is a primarily remote role requiring work during US hours.

Deploys, configures, integrates, and operates Databricks and enterprise cloud data infrastructure for HUD. Automates infrastructure through IaC, scripting, APIs, and CI/CD; configures security, identity, access, compute, storage, and Unity Catalog. Supports data pipelines and Databricks applications, troubleshoots platform and integration issues, documents procedures, collaborates with cloud, cybersecurity, DevSecOps, and application teams, and provides technical leadership.

Design, build, and optimize scalable cloud and web software with focus on infrastructure, performance, and hardware integration for IoT devices. Collaborate with hardware teams to ensure connectivity and high availability, implement new features, and improve system efficiency.