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.

Lead design and delivery of Klaviyo's scalable data platform (streaming, batch, lakehouse, governance). Define SLOs, author ADRs/RFCs, implement ingestion/CDC, processing, storage, catalog/lineage and access controls. Optimize performance/cost, apply ML/GenAI to data workflows, partner with product/analytics, contribute code/reviews, and mentor senior engineers to enable reliable, multi‑tenant data at scale.

Design, implement, and deploy safety-critical navigation and state estimation systems for aerospace platforms. Develop EKF and GNSS/INS integration, multi-sensor fusion for GPS-denied environments, FDIR and integrity monitoring, and V&V test plans. Support certification, requirements allocation, performance analysis, flight test evaluation, and provide technical leadership and mentoring.

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.

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.

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.

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.

Lead design and delivery of flight-critical power electronics for the X-BAT aircraft, including inverters, DC-DC converters, and battery management. Own full hardware development cycle, drive PCB layout, harden designs for harsh environments, mentor engineers, lead reviews, and manage program timelines through production.

Lead architecture, development, and validation of end-to-end aircraft fuel systems. Drive cross-functional integration, system-level modeling (CFD), verification, supplier qualification, ground and flight test support, anomaly root-cause analysis, and mentor engineering teams while contributing to long-term fuel-system technology roadmaps.

The Senior Kubernetes Engineer will manage and enhance Kubernetes clusters, automate deployments, ensure security, and collaborate with teams to deliver reliable containerized applications.

Lead architecture and evolution of an enterprise Kubernetes platform across cloud and on-premises. Define platform roadmap, standards, and automation; design multi-cluster/multi-region solutions; implement GitOps, IaC, observability, security, and resiliency practices; mentor engineers and drive cross-functional platform initiatives for reliability, scalability, and developer experience.

Owns and evolves the enterprise Major Incident Response, Post-Incident Review, and Problem Management programs. The role engineers ServiceNow ITSM workflows, automations, integrations, dashboards, SLA/SLO tracking, and incident escalation processes. It serves as Incident Commander for high-severity events, leads RCA and continuous improvement, manages an offshore operations team, and communicates program health to executive stakeholders. The position requires participation in on-call rotations and hybrid work onsite in Marlborough, Massachusetts.

Develop and manage SQL Server Always-On databases, schemas, stored procedure interfaces, and data warehouses. Collaborate with physicists, engineers, and test teams to characterize atomic clock test data. Support automated test equipment, visualization, statistical, numerical, and machine-learning analysis using JMP, Origin, Python, and R. Integrate test data with traceability, manufacturing telemetry, and returns data. Manage database source code and execute validation testing. U.S. Person status is required.

Lead development and application of advanced signal processing, detection, classification, and machine learning algorithms for radar and RF sensing/electronic warfare. Engage customers, lead multidisciplinary teams, translate capabilities into requirements, develop prototypes and demonstrations, and support business development and proposals.

Lead design and implementation of scalable, secure full-stack web applications and core platform modules. Influence architecture, deliver clean well-tested code, mentor engineers, integrate LLM/AI services responsibly, diagnose production issues, and collaborate across product, QA, and platform teams to meet regulatory and quality standards.

Lead commissioning and production readiness for high-volume advanced-materials manufacturing lines. Design and optimize workflows, implement MES and process-monitoring systems, establish qualification protocols, define process controls, and build quality-management infrastructure. Translate developmental materials processes into repeatable, scalable manufacturing while driving root-cause analysis, corrective action, safety, and continuous improvement. Collaborate cross-functionally with equipment and process engineering teams in a resource-constrained startup environment.

The Security Engineering Manager oversees IT security policies, manages incident response, tracks threats, engages with IT teams, and provides regular incident reporting.

Develop and implement AI validation methodologies, enhance application performance, collaborate with Agile teams, and lead AI testing efforts for healthcare products.