Top Principal Engineer Jobs in Boston, MA

Serves as a technical leader for complex software and data initiatives across a digital and data engineering portfolio. Designs data architectures, models, pipelines, integrations, analytics collection platforms, and backend services using cloud and modern engineering technologies. Guides agile teams, establishes engineering standards and governance, improves data quality and efficiency, supports implementations, and mentors engineers. Collaborates with stakeholders, leadership, solution engineers, and cross-portfolio technology teams to deliver business value and improve technical practices.

Serve as a global SME for Industrial Metaverse technologies (PLCs, IoT, cloud/edge, digital twins, AI, EMC/RED, cybersecurity). Lead standards work, develop test programs, perform and supervise complex testing, train staff, represent UL externally, and support clients and continuous improvement across regional or global labs.

Provides hands-on technical leadership for scalable full-stack web applications and core platform services. Designs architecture, develops and deploys secure software, resolves distributed-system issues, mentors engineers, and collaborates across product and QA teams. Integrates LLMs, AI-assisted workflows, and agentic capabilities into .NET and Python systems while applying responsible AI practices. Contributes to technical documentation, quality standards, regulatory compliance, and the full software development lifecycle.

Lead the architecture, design, development, integration, testing, and deployment of advanced radar systems. Research RF sensing approaches, translate customer needs into system concepts, define requirements and architectures, conduct simulations and performance analysis, and guide multidisciplinary teams across software, hardware, integration, and test. The role also involves customer briefings, technical reviews, modeling in Cameo, verification planning, and technical leadership of advanced development projects.

Lead long-term strategy and architecture for cloud and on‑prem platform infrastructure, driving Kubernetes and multi‑cloud reliability, IaC/GitOps automation, observability, SLO/SLI/error‑budget practices, incident leadership, AI‑augmented tooling adoption, and mentorship of senior engineers to improve platform resilience and developer experience.

Leads the technical vision, architecture, design, development, and delivery of complex full-stack applications for Global Finance Tech. Provides hands-on technical leadership, mentorship, code and design reviews, and establishes engineering standards. Oversees testing, CI/CD, observability, production support, incident resolution, and architecture documentation. Partners with product, business, and architecture leaders on roadmaps and enterprise initiatives, including integrating AI-powered capabilities across products.

Leads discrete semiconductor product design, characterization, qualification, yield and quality improvement, cost reduction, and customer-facing engineering. Collaborates with foundry, test, manufacturing, QA, suppliers, and subcontractors to qualify materials and packages. Supports new and existing products, documentation, BOM development, military-standard compliance, failure analysis, and custom engineering. Mentors less experienced engineers and supports marketing and planning teams.

Provides technical leadership for TJX’s global application portfolio, defining scalable and secure solutions while evolving mainframe engineering practices. Leads architecture and delivery decisions, supports production stability, mentors distributed engineering teams, and drives continuous improvement. The role requires extensive experience with COBOL, IMS, DB2, CICS, and JCL, plus strategic technical leadership, agile delivery, incident management, and application modernization expertise.

Develops novel sensor technologies and detection methods for next-generation diagnostic and point-of-care medical devices. Responsibilities include planning and conducting laboratory experiments, applying scientific methods, analyzing data, documenting results, collaborating with multidisciplinary teams, and guiding junior personnel. The role requires expertise in sensor technology, electrochemistry, engineering, chemistry, microfluidics, lab-on-a-chip systems, and biomedical applications, with occasional domestic and international travel.

Lead design and prototyping of generative AI experiences for autonomy development; drive UX for Hivemind products; perform user research, collaborate with CTO and product leads, and deliver reference implementations and integrations across full-stack web and edge systems.

As a Principal Engineer for Core Infrastructure at Klaviyo, you will architect and enhance the Kubernetes platform and CI/CD pipelines, improve developer velocity, and ensure operational excellence while incorporating AI tools for automation and incident response.

Design and deliver developer tooling, frameworks, reusable templates, AI-assisted development infrastructure, authentication and identity platforms, and cloud-native services. Build and operate Java and AWS systems using Spring Boot and Kubernetes, establish engineering standards and guardrails, improve reliability and performance, and lead complex technical projects. Partner across teams to drive adoption, alignment, and measurable engineering productivity outcomes.

As a Senior Principal Engineer, you'll define and drive the technical strategy for customer experience platforms, lead architectural decisions, and mentor engineering teams to enhance customer and agent experiences.

Build and operate AWS and Azure cloud platform foundations, including landing zones, multi-account structures, account vending, Terraform modules, guardrails, CI/CD, centralized monitoring, and configuration-drift remediation. Lead and mentor platform engineers, establish reference architectures and self-service patterns, review application designs, author architecture decisions, and represent the platform in governance forums. The role supports regulated environments, AWS GovCloud, and large-scale data center migration.

Owns resilience, performance, scalability, and operational cost improvements for a cloud-native platform. Designs and delivers full-stack solutions, builds monitoring and analysis capabilities, performs architectural and code reviews, and resolves complex production issues. The role requires pragmatic modernization judgment, AI-assisted development experience, customer or user accountability, and participation in a weekend on-call rotation.

Provides technical leadership for Bluehost’s large-scale hosting platform. Sets architecture standards, designs Python and MySQL backend systems on Linux, modernizes Perl and cPanel integrations, and drives reliability engineering practices. Leads complex incident root-cause analysis, establishes AI-augmented delivery standards, mentors senior engineers, and shapes multi-quarter technical roadmaps across the organization.

Own the architecture, product direction, and hands-on development of Phoenix’s payments infrastructure across processors, gateways, vaults, tokenization, wallets, routing, authorization, disputes, fraud, reconciliation, and reliability. Lead merchant and processor integrations, improve approval rates, manage payment-method portability, maintain PCI-compliant systems, and own incident response. The role combines principal engineering with payments product ownership, requiring direct customer engagement, roadmap decisions, technical design, coding, and accountability for business outcomes.

Leads architecture, design, development, deployment, and production support for complex enterprise software and cloud-native solutions. Advises strategic customers, resolves critical technical issues across application and infrastructure layers, shapes product direction, and drives engineering excellence through modern development practices. Mentors engineers, guides architecture decisions, and collaborates with product, QA, DevOps, SRE, and infrastructure teams. The role primarily supports HealthEdge’s healthcare claims administration platform and customer implementations.

Lead platform engineering initiatives and provide architectural direction for internal developer platforms, build systems, CI/CD pipelines, release automation, and cloud-native infrastructure. Improve software delivery through automation and AI-enabled engineering capabilities while ensuring scalability, reliability, security, and maintainability. Evaluate technologies, collaborate across teams, mentor engineers, and guide technical decisions.

Defines long-term software architecture and technical strategy for Bose’s automotive technology portfolio. Designs scalable, modular, configurable platforms that operate across automotive hardware, operating systems, customers, and product generations. Partners with audio, acoustics, signal processing, and AI/ML teams to productionize advanced capabilities, engages OEMs and ecosystem partners, leads complex architecture decisions, resolves technical challenges, and mentors senior engineers and architects.

Design, build, deploy, and maintain resilient, scalable production systems for Toast’s retail customers. The role sets long-term technical architecture and strategy, communicates technical direction, mentors senior engineers, improves engineering productivity, diagnoses performance issues, and drives initiatives amid ambiguity. Engineers collaborate directly with retail customers, visit stores, understand operational workflows, and use AI tools to improve development velocity and quality.

The Principal Engineer will lead the design and delivery of core platform capabilities, focusing on scalable systems, AI application, and mentoring engineers while driving architectural decisions and improving operational systems.

Design and implement music and voice processing algorithms in MATLAB/Simulink and deploy them as embedded real-time DSP software across multiple DSP platforms. Develop unit and system tests, collaborate with research and audio engineers, provide technical leadership and mentorship, and use lab tools (oscilloscopes, logic analyzers, emulators) to verify functionality.

Lead platform and system architecture for advanced audio and sound management across consumer and automotive products. Define system requirements, develop scalable architectures, guide trade studies, mitigate technical and safety risks, and drive cross-functional delivery from concept through launch using MBSE, analytical methods, and systems thinking.

Principal Software Engineer designing and delivering full-stack, cloud-native solutions across React, Node.js, TypeScript, and Java. The role leads Micro Frontend strategy, AI-driven workflow development, distributed systems architecture, data quality, security, testing, observability, and reliability initiatives. Responsibilities include solving complex technical problems, collaborating cross-functionally, establishing engineering best practices, mentoring engineers, and driving scalable, resilient software delivery in an agile environment.