Top Senior Full-Stack Engineer Jobs in Boston, MA

Build and scale full-stack SaaS applications using Java and React. Participate throughout the software development lifecycle, collaborate with product and engineering teams, ensure comprehensive testing, troubleshoot products, provide technical support, advise product leadership, and mentor junior engineers.

Lead a small engineering team while building production-grade frontend and backend systems. Design GraphQL and REST APIs, develop React and Node.js applications, support data ingestion and ETL workflows, and own cross-domain technical initiatives. Drive Agile execution, delivery tracking, architecture, testing, performance, and engineering quality. Mentor engineers, collaborate with Product stakeholders, and use AI-assisted development tools to improve delivery efficiency.

Build and improve Synera’s web execution platform, low-code desktop editor, and customer portal. Own features end-to-end, simplify complex engineering automations, collaborate on technical design, review code, support customers, prototype solutions, and contribute to architecture and software development practices. Over time, take ownership of larger features, epics, technical domains, and module-level design decisions.

Develop fullstack web applications, enhance platform performance, collaborate on high-impact opportunities, and ensure stable, scalable solutions. Engage in rapid iterations and be a committed team player.

Own fullstack features end to end across frontend and backend services, including payment and gift card integrations. Debug production issues, make architecture and systems design decisions, participate in on-call support, and collaborate cross-functionally in a fast-moving team. Use AI coding tools such as Claude and Devin as part of an AI-first development workflow while applying sound judgment regarding their use.

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.

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.

Designs and ships full-stack features across Angular, PHP/Symfony, Go, and MySQL. Responsibilities include architecture, data modeling, API design, testing, code reviews, technical design leadership, mentoring engineers, AI-assisted development, production support, incident investigation, and systemic improvements. The role is fully remote in the US and collaborates with global engineering teams.

Build Nango’s developer infrastructure platform across backend services, APIs, runtimes, dashboards, SDKs, CLI, MCP, and web applications. Own product surfaces end to end, work directly with customers, shape product and technical roadmaps, design reliable systems, and maintain open-source projects. The role requires strong backend fundamentals, TypeScript experience across Node.js and React, product ownership, developer empathy, communication, and autonomy in a remote startup environment.

Own full-stack features for Techstars OS from data ingestion and APIs through React interfaces and production delivery. Build AI-native search, retrieval, and assistive workflows using founder and portfolio data. Lead migration and retirement of legacy tools, develop data pipelines, improve testing and CI/CD, and provide architectural guidance. The role requires strong autonomy, written communication, and end-to-end ownership across cloud infrastructure and product development.

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.

Senior Full Stack Engineer responsible for taking over an existing software project, completing unfinished features, resolving bugs, improving frontend and backend systems, integrating APIs and databases, refactoring for reliability and scalability, and preparing the application for production. The role requires independent ownership, strong debugging and software development skills, collaboration with stakeholders, automated testing, deployment workflows, and clear technical documentation.

Build and evolve scalable full-stack systems for People Data Labs’ APIs, self-serve products, and customer success tools. Responsibilities include designing frontend and backend architecture, developing React and Python applications, ensuring data integrity, implementing reliable APIs, optimizing performance, operating production services, collaborating with stakeholders, writing technical designs, mentoring engineers, and improving development practices.

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.

Build, test, review, deploy, monitor, debug, and maintain full-stack software used in K-12 classrooms. Work primarily with React, TypeScript, Node.js, and AWS while improving complex codebases and service design. Participate in incident response, refactoring, code reviews, pairing, mentorship, and cross-functional collaboration with product, design, and education experts. Use AI tools thoughtfully and prioritize reliable, accessible, and equitable learning experiences.

Build and ship full-stack, AI-powered analytics features for large datasets. Develop user-facing experiences, prototype and validate LLM- and agent-powered workflows, integrate agents with tools such as Slack and alerting systems, and collaborate with data teams. Own solutions end to end, ensuring they are scalable, maintainable, production-ready, and aligned with user needs. Use cloud-native technologies and observability tools while iterating rapidly based on user feedback.

Build enterprise-scale workforce management software covering forecasting, capacity planning, scheduling, adherence, intraday management, and operational reporting. Develop Java and Spring Boot microservices, React and TypeScript applications, REST APIs, event-driven workflows, integrations, and PostgreSQL data models. Contribute to cloud-native deployments, CI/CD, testing, performance optimization, architecture, production support, and client-facing technical collaboration.

Build and maintain enterprise workforce management software for forecasting, scheduling, adherence, intraday management, and reporting. Develop Java and Spring Boot microservices, React and TypeScript applications, REST APIs, event-driven workflows, integrations, and PostgreSQL data models. Support cloud-native deployments, CI/CD, testing, performance optimization, production troubleshooting, architecture discussions, and client-facing collaboration.

Develop and debug production-grade full-stack applications across front-end and back-end systems. Build features, APIs, databases, and data models; troubleshoot end-to-end issues; analyze unfamiliar codebases; translate implementations across programming languages; and review AI-generated and developer-written code for correctness, security, scalability, performance, and maintainability.

Design, build, and maintain production-grade .NET web applications and APIs on Azure. Own full-stack delivery from data models and SQL to front-end components, CI/CD, testing, and architecture. Collaborate with product and delivery teams, participate in code reviews, and ensure secure, observable, well-tested services.

Develop firmware, backend systems, and tooling for cellular IoT devices. Responsibilities include C development for STM32 microcontrollers, embedded AI integration, cellular communication, low-power optimization, device debugging and validation, and backend development with Python and Ruby on Rails. The role collaborates with hardware, electronics, and manufacturing teams and requires independently leading complex development initiatives.

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.

Develop and enhance full-stack web applications for CDMRP, including portal integrations, single sign-on, microservices, responsive front-end and back-end features, REST APIs, testing, performance optimization, and legacy modernization. Collaborate with portal, systems administration, and security teams; apply UX practices; document architectures and services; and ensure compliance with DoD security procedures and STIG guidelines.

Develop and deploy responsive full-stack web applications from design through production. Translate product requirements into high-quality software, maintain pixel-perfect design standards, collaborate with product, design, and QA, and help guide technology strategy. The role acts as a technical lead on product initiatives and reports to the CTO, with a focus on AI-native development and secure fintech workflows.

Leads the design, development, and implementation of full-stack applications using C#, .NET, Angular, Azure, and SQL Server. Collaborates with cross-functional teams, ensures application security, performance, and scalability, applies Git-based version control practices, mentors developers, and stays current with emerging technologies.