Top Principal Engineer Jobs in Boston, MA

Lead full‑stack development of customer‑facing features, own product lifecycle from design to release, build scalable AI‑enabled back‑end systems on AWS, improve CI/CD and testing, collaborate with product, design, and ML researchers, and ensure security and privacy best practices.

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.

Lead the architecture and implementation of scalable cloud compute functionality across ARM64 and x86 platforms. Design hypervisor layers, cross-platform build pipelines, and performance optimization solutions while writing, reviewing, documenting, and testing production software. Coordinate globally to deliver compute features and resolve low-level software issues. Provide technical, organizational, and functional leadership to engineers.

Leads electrical engineering design and delivery for municipal and industrial water and wastewater facilities, including treatment plants and pump stations. Provides technical leadership, client advising, design review, construction support, project oversight, mentoring, and business development. Develops power distribution, control, communications, lighting, and electrical infrastructure solutions while managing scope, schedule, budget, quality, and risk. Travel up to 25% is expected.

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 architecture, design, and delivery of custom manufacturing equipment. Translate process requirements into mechanical systems, make build-vs-buy decisions, prototype and deploy hardware, and establish practices for in-house equipment development while mentoring a growing team.

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.

Provide cross-functional systems engineering support for advanced thermal energy storage technology. Own system requirements and traceability, define subsystem interfaces, identify applicable codes and standards, lead FMEA, HAZOP, fault-tree, and risk mitigation activities, and support design reviews and test planning. The role also includes electrical systems analysis, hands-on shop-floor hardware inspection, lab troubleshooting, and collaboration across mechanical, electrical, chemical, and controls disciplines.

Build and maintain parsing infrastructure, SDKs, data models, and services for hardware design collaboration. Develop parsers for circuit-design formats, binary file-merging capabilities, test harnesses, developer tooling, and performance improvements. Collaborate with engineering, product, sales, and other stakeholders to define interfaces, requirements, timelines, and constraints while driving autonomous, cross-functional projects.

Lead quality engineering for cloud-based compute microservices by developing automated unit, integration, and end-to-end testing frameworks and pipelines. Create test plans, automate deployments and rollbacks, troubleshoot complex issues, identify root causes, and mentor junior engineers. The role requires deep Python and Pytest expertise, automation tooling experience, Linux performance knowledge, Bash scripting, Docker, and strong networking fundamentals.

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.

Owns the design, operation, troubleshooting, security, documentation, and continuous improvement of Mimecast’s global corporate network. Responsibilities include managing multi-vendor infrastructure across routing, switching, wireless, SD-WAN, SASE, and out-of-band systems; leading upgrades; partnering with Security and IT teams; and using Python, Ansible, or similar automation to improve operational efficiency and configuration consistency.

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.

Leads production test engineering for electro-mechanical and electro-optical systems across defense and space programs. Develops and deploys in-process and final acceptance testing solutions, test equipment, checkout procedures, training, and corrective actions. Derives system-level integration and test requirements, manages technical risks, supports program execution, and mentors less experienced engineers. Requires substantial systems engineering experience and the ability to obtain and maintain a government security clearance.

Develops and maintains real-time embedded software for medical organ-preservation devices across the full product lifecycle. Responsibilities include requirements analysis, risk assessment, software architecture, implementation, testing, verification, regulatory compliance, audit and FDA submission support, and field-complaint root-cause correction. The role also manages software development procedures and projects while collaborating with stakeholders. It is onsite five days per week and may require up to 20% combined domestic and international travel.

Designs and builds high-performance C++ image-processing pipelines and services for an AI-driven cardiovascular medical imaging platform. Develops software for volumetric CT/CTA data, segmentation, registration, and clinically meaningful visualization. Optimizes algorithmic efficiency, memory usage, file I/O, and parallel execution using multithreading, CUDA, and profiling. Collaborates with machine learning and visualization engineers to deliver reliable, scalable production systems.

Lead quality engineering strategy and execution through scalable automation frameworks, AI-driven testing, CI/CD integration, quality governance, and cross-functional enablement. Build and evolve Playwright and Cucumber frameworks, improve testability and continuous testing, establish quality standards and metrics, and support API, performance, security, and observability initiatives. Guide scrum teams and mentor engineers while scaling automation practices across applications and teams.

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.