Top Senior Full-Stack Engineer Jobs in Boston, MA

Build and ship end-to-end product features across an author analytics dashboard, marketing site, free tools, billing, email, and AI-assisted functionality. Design data models and APIs, integrate third-party services, develop production LLM features, and maintain testing, monitoring, performance, and observability. The role includes code review, technical documentation, independent product decisions, and close collaboration with the founder in a remote-first environment.

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.

As a Senior Full-Stack Software Engineer, you will build AI-centric web applications in TypeScript, manage project priorities, and make technology decisions while collaborating with Product and Design teams.

Develop and maintain Java applications, RESTful services, and Angular frontends using Spring Boot and NgRx. Deploy applications to cloud platforms, practice TDD, manage CI/CD with Jenkins, and work with Oracle and PostgreSQL databases. Participate in agile processes, collaborate with cross-functional teams, mentor engineers, and independently lead technical initiatives and feature delivery.

Design, build, and modernize full‑stack web applications and microservices for a real‑time event-driven data and visualization platform. Develop and optimize streaming data pipelines (Kafka, Flink, Spark), integrate observability, caching (Redis), and AI agents, and collaborate with hardware verification teams for scalable, low-latency solutions.

Own the realtime and voice layer of an agentic AI travel assistant, including telephony integrations, speech pipelines, model orchestration, and low-latency performance. Build React and TypeScript front ends, Scala and Python services, and GCP infrastructure. Design multi-tenant systems, safety and compliance controls, observability, incident response, and partner integrations. Mentor engineers and contribute to architecture and code quality.

Lead frontend-leaning full-stack implementation work for carrier and enterprise integrations: architect reusable UI and API layers, author RFCs, guide technical delivery, enforce testing and security best practices, and partner with cross-functional teams to scope and ship production integrations.

Build and maintain full-stack features across a Ruby on Rails monolith and Go microservices. Develop candidate portals, partner integrations, I-9 workflows, adjudication tools, asynchronous vendor pipelines, and AI-powered document and automation features. Own work end to end, including testing, code review, deployment, monitoring, and major user experience paths. Work with PostgreSQL, REST APIs, webhooks, OAuth, SFTP, and server-rendered frontends.

Build and modernize Scribd’s core reading experience for millions of users. Responsibilities include migrating Rails frontend surfaces to microfrontends, developing React and Next.js features, creating GraphQL APIs, building Node, Python, and Go services, improving document ingestion infrastructure, collaborating with Data/ML, Design, and Product teams, contributing to the design system, and enhancing frontend performance, accessibility, SEO, and maintainability.

Build and scale Cresta’s no-code conversation intelligence platform across the frontend and backend. Responsibilities include creating visual workflow editors, backend services and APIs, data models, storage layers, and scalable systems using React, TypeScript, Python or Go, Postgres, ClickHouse, and Elasticsearch. Collaborate with product, design, and AI/ML teams to deliver intuitive experiences for non-technical users while improving performance, reliability, security, and maintainability.

Build scalable full-stack applications integrating healthcare insights with browser-based and Windows EHR systems. Develop products using FHIR and HL7 interoperability standards, collaborate on technical roadmaps, and implement performant solutions. Mentor junior engineers, conduct code reviews, make technical decisions, and partner with engineering, product, and business stakeholders using Agile processes.

Lead end-to-end design, development, and delivery of full‑stack features; drive architecture and code reviews; coordinate engineering work, write design docs and tests, and participate in Agile ceremonies. Must have blockchain/crypto experience.

Design, architect, develop, test, and support scalable full-stack applications for a data catalog platform. Own features end to end, contribute to technical strategy and roadmaps, ensure operational excellence, collaborate across distributed teams, and mentor engineers. Build multi-tenant systems supporting high data volumes and near-real-time analytics while applying AI-assisted development practices.

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.

As a Senior Fullstack Software Engineer, design and maintain scalable web applications, work across the tech stack, and mentor junior developers to improve user experience and safety.

Lead frontend development for a satellite-data monitoring application serving defense and intelligence customers. Design and implement React and TypeScript features, guide frontend architecture, contribute to backend APIs, mentor engineers through reviews and technical discussions, and collaborate with product managers and designers. Own feature delivery from discovery through deployment while improving state management, data fetching, component design, testing, and frontend best practices.

Build and maintain Alpaca Connect developer-platform experiences using TypeScript, React, and Go. Improve onboarding, app management, compliance review, publishing, consent, and permissions workflows. Design APIs and integrations with identity, account, trading, and market-data systems while creating secure, auditable self-service tools. Own features from design through production and collaborate with Product, Design, Compliance, Support, Partnerships, and Platform teams.

Lead architecture and implementation of backend and full-stack capabilities for real-time warehouse automation software. Design scalable Java and Spring microservices, Kafka integrations, REST APIs, stateful workflows, and Angular user interfaces. Drive technical direction, code quality, testing, observability, resiliency, production support, and cross-team delivery. Mentor engineers and collaborate with product, QA, SRE, and adjacent engineering teams to improve system reliability.

Lead front-end modernization and deliver full-stack features using React, .NET, PostgreSQL, and cloud technologies. Build accessible, performant applications and design systems; extend APIs, optimize SQL, contribute to Kafka pipelines, and improve testing, observability, CI, and security. Use AI coding agents for migrations, refactoring, and test generation while applying strong engineering judgment. Collaborate with product, UX, DevOps, and stakeholders to deliver reliable healthcare payment-integrity software.

Design and implement reliable, scalable full‑stack web tools (backend and frontend) to automate and optimize chip design and verification workflows. Build web applications in Go, TypeScript, and JavaScript, model hardware-level product definitions, research solutions to improve engineering efficiency, and support hundreds of global users.

Design and build a high-performance, AI-native web trading experience for sophisticated retail traders. Ship core trading workflows (order entry, positions, blotter, watchlists, alerts), implement trustworthy AI UI patterns, collaborate with backend engineers on low-latency contracts, and iterate quickly with users and stakeholders to deliver end-to-end product features.

Build and operate backend services for core collaboration applications, owning APIs, data models, AWS infrastructure, reliability, observability, and cost. Develop AI-assisted product features, contribute to Angular applications, and manage end-to-end feature delivery. Diagnose distributed-system issues, improve testing and engineering practices, collaborate cross-functionally, mentor engineers, and lead design reviews. The role is hybrid in Boston with two office days per week.

Senior Full Stack Engineer (backend-focused) to design, build, and operate scalable backend systems and APIs, deliver full-stack features, improve reliability and observability, and contribute to architecture and technical strategy in a fast-paced startup environment.

Lead full‑stack engineering initiatives to build AI-enabled healthcare products. Ship physician-facing web and mobile features, integrate ML/LLM tooling, architect scalable back-end systems and health data pipelines, and collaborate cross-functionally with product, clinical, and research teams.