Top Principal Engineer Jobs in Boston, MA

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.

Designs, develops, and optimizes embedded firmware for microcontroller-based motion control systems. Responsibilities include bare-metal and RTOS development, motor and sensor interfaces, low-level drivers, hardware bring-up, board-level debugging, peripheral integration, performance optimization, documentation, design reviews, and mentoring junior engineers.

Leads electrical engineering projects from concept through production, designing PWM amplifiers, power converters, power supplies, and embedded hardware/software. Develops microprocessor and FPGA solutions, performs circuit simulation and validation, oversees PCB design, and tests prototypes using laboratory equipment. Ensures manufacturability, reliability, and performance while collaborating with cross-functional engineering teams.

Leads architecture, technology strategy, and execution for FMI’s CRM and Ordering Management transformation. The role directs migration from Microsoft Dynamics 365 to Salesforce, defines transition and future-state architectures, oversees integrations, data migration, governance, security, and platform roadmaps, and establishes modern engineering practices. It also mentors engineering teams, drives DevSecOps, CI/CD, automated testing, AI-assisted development, and reliable delivery across enterprise platforms including LIMS, billing, and medical reporting systems.

Leads the strategy, architecture, and operation of Kubernetes-based cloud and on-premise infrastructure. Drives reliability engineering, Infrastructure as Code, GitOps, observability, automation, incident response, capacity planning, and cost optimization. Leads cross-functional platform initiatives, establishes SLOs and error budgets, mentors engineers, and advances AI-enabled engineering practices across the organization.

Develop and enhance Onshape’s full-stack collaborative CAD platform, including user interface, backend services, modeling workflows, performance optimization, and large-scale data handling. Collaborate with product, UX, and QA teams, participate in code reviews, resolve defects, and provide technical guidance on system design and implementation.

Leads systems engineering and mission engineering for complex integrated hardware/software and system-of-systems programs. Explores architectures and design trade spaces, performs simulation-based performance analysis, defines architectures using digital engineering and MBSE, manages technical risks, leads teams, briefs sponsors, develops R&D proposals, establishes best practices, and mentors engineers.

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.

Leads the architecture, design, and implementation of Vertica’s core database engine. Drives innovations across query optimization, distributed execution, storage, concurrency, scalability, and performance using C++. Defines long-term technical strategy, architects complex distributed database features, guides testing, collaborates with customers and cross-functional teams, mentors engineers, and influences product roadmaps. Requires deep database internals expertise, large-scale systems experience, and strong technical leadership.

Designs and leads large-scale software subsystems, architecture, coding standards, code reviews, debugging tools, performance optimization, refactoring, and QA automation. Guides business and technical solution definition, evaluates production readiness using objective metrics, and develops web content management, workflow automation, integrations, and database solutions. The role is telecommuting eligible throughout the United States.

Leads architecture, technical direction, and hands-on development of robotic manipulation software. Develops motion planning, kinematics, control, multi-arm coordination, simulation, hardware integration, and distributed-system interfaces. Oversees testing, deployment, production support, troubleshooting, design reviews, and engineering standards while mentoring engineers and coordinating with multidisciplinary teams.

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.

Leads new product introduction manufacturing for complex FDA- and ISO-regulated electromechanical medical equipment. Oversees design transfer, manufacturing readiness, DFM/DFA, process development, validation, tooling, automation, testing, troubleshooting, and commercialization. Coordinates cross-functional engineering, quality, regulatory, supply chain, and manufacturing teams; establishes process metrics; and provides technical leadership and mentorship without direct people-management responsibility.

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.

Lead performance and reliability initiatives across Sonos embedded player APIs and control components. Design architectural improvements, optimize player-to-app and player-to-cloud communication, analyze telemetry, and resolve complex multithreaded system issues. Collaborate with App, Cloud, Security, Data, UX, PM, and QA teams while mentoring engineers, participating in the full software development lifecycle, and presenting technical proposals to leadership.

Lead development and operation of a scalable Kubernetes-based cloud-native platform. Shape the engineering roadmap, deliver enterprise platform capabilities, establish best practices, mentor engineers, and collaborate across Agile teams. Build highly available and fault-tolerant production services using Kubernetes and cloud-native technologies, while applying expertise in Go, Python or Bash, networking, Linux, and CI/CD practices.

Build scalable AI capabilities for Fidelity Wealth, partnering with business, product, architecture, data, and platform teams. Develop secure, reliable, production-ready solutions; apply modern software architecture, cloud platforms, testing, and design patterns; lead technical discussions; mentor engineers; and deliver end-to-end full-stack systems.

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.

Develop, maintain, and optimize mission-critical backend APIs and scalable cloud services for web and mobile clients. Implement secure, high-performance systems, automated tests, observability, and technical documentation. Mentor peers, follow best practices, and support a proof-of-concept launch and fundraising activities as a volunteer contributor.

Volunteer Principal Front End Developer to build React/React Native web and mobile features, mentor engineers, implement scalable full‑stack solutions, ensure cross‑browser compatibility and testing, work with Node/MongoDB/AWS, attend weekly standups, and support a fundraising launch. Minimum 4 hours/week commitment.

Volunteer Principal Full Stack Engineer to lead and contribute across frontend and backend (React/React Native, Node.js, MongoDB). Own feature development, mentor engineers, collaborate with product/design, ship scalable code, and support CI processes. Must commit 4+ hours weekly and attend a weekly standup; first task includes launching a fundraising campaign.

Leads architecture and development of Azure Storage table, metadata, and indexing systems at massive cloud scale. Designs distributed-system primitives for partitioning, indexing, transactions, consistency, replication, caching, and high-performance data access. Drives architectural decisions, prototypes innovations through production, and improves performance, scalability, reliability, and cost efficiency. Requires deep expertise in distributed storage, databases, or large-scale systems.

Own end-to-end DFT architecture, implementation, verification, DRC closure, test coverage, timing constraints, and post-silicon debug for ASICs. Work across Logic BIST, MBIST, BISR, scan compression, Boundary Scan, JTAG, ATPG, and mixed-signal IP integration. Collaborate with architecture, RTL, physical design, and product teams to resolve design and testability issues, automate flows using TCL, support hierarchical integration, and achieve first-pass silicon success.

Leads technical delivery architecture for complex mainframe modernization projects. Designs and implements Rocket Software solutions, manages technical project scope, develops proofs of concept, guides modernization and migration efforts, leads technical teams, communicates risks and requirements, estimates changes, conducts code reviews, and advises customers. The role also supports presentations, training, defect resolution, automation pipelines, DevOps practices, and modernization of COBOL applications and mainframe data.

Leads hands-on embedded firmware development, architecture, debugging, hardware integration, driver and communication-stack development. Designs RTOS-based systems, reviews schematics and PCB layouts, supports manufacturing, resolves system-level issues, leads technical reviews, improves engineering processes, and mentors firmware engineers. The role requires close collaboration across electrical, mechanical, systems, and software teams in product development environments.