Top Principal Engineer Jobs in Boston, MA

Provides technical leadership on complex, high-impact engineering projects from design through launch. The role involves architecture, company-wide initiatives, engineering excellence, mentoring technical leaders, and establishing standards for scalable, reliable, secure, observable systems. The engineer will collaborate across teams, communicate complex technical topics, and apply customer-focused decision-making and A/B testing techniques.

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.

Principal Engineer serving as the CTO’s technical deputy, leading day-to-day engineering execution, architecture, code reviews, developer support, and delivery. The role requires hands-on full-stack development across databases, backend, frontend, cloud infrastructure, and DevOps. It also champions AI-agent-assisted development by establishing workflows, guardrails, and quality standards. The engineer will mentor teammates, resolve technical blockers, improve reliability and documentation, and collaborate with technical, product, and research stakeholders.

Leads the architecture and hands-on implementation of connected firmware platforms, including wireless connectivity, embedded UI, provisioning, pairing, and app/cloud integration. Defines technical standards, reviews internal and partner designs, supports wireless certifications, and resolves interoperability issues. Establishes testing, build, coding, and reproducibility standards while mentoring engineers and influencing cross-functional technical direction. Requires deep embedded C/C++ expertise, connected-device architecture experience, wireless certification knowledge, and a track record in consumer electronics, IoT, robotics, or related high-volume products.

Leads architecture, reliability, and automation for cloud network foundations across AWS, GCP, Azure, and internal infrastructure. Designs routing, segmentation, firewalls, connectivity, access, and infrastructure-as-code systems; establishes SLOs, monitoring, incident response, and recovery practices. Builds reusable automation, improves change safety, partners across platform, security, IT, and engineering teams, serves as a senior escalation point, creates operational standards, and mentors engineers.

Own the architecture, technical direction, quality, and long-term support of SharkNinja’s consumer mobile application. Build hands-on with React Native, Expo, and TypeScript; design connected-device experiences, pairing flows, protocols, and real-time synchronization; and support BLE and WiFi reliability. Establish reusable patterns, libraries, testing, and release practices, lead architectural research, mentor engineers, collaborate with global teams, and onboard new products to the app.

Design and evolve distributed search and analytics systems for the Splunk platform. Lead complex engineering efforts from design through delivery, improve performance and reliability, mentor engineers, collaborate cross-functionally, and work with customers to resolve production issues.

Owns commissioning and production readiness for a high-volume advanced materials manufacturing line. Responsibilities include designing material flows, defining process windows and equipment parameters, implementing MES, SCADA, and SPC systems, establishing QA/QC controls, qualifying equipment, investigating nonconformances, driving corrective actions, supporting production, and mentoring technical staff. The role translates novel materials processes into controlled, repeatable manufacturing while leading continuous improvement during an aggressive production ramp.

Leads complex mechanical and electromechanical product development from concept through manufacturing. Sets technical direction, develops designs using Creo or SolidWorks, builds and tests prototypes, conducts analyses and verification, and applies DFM, DFA, cost, and reliability principles. Leads multidisciplinary teams, mentors engineers, supports client engagements and proposals, manages technical risks, and communicates design tradeoffs to clients and stakeholders.

Leads supplier quality for high-reliability printed wiring boards by conducting audits, capability assessments, source inspections, first article inspections, and process evaluations. Analyzes supplier metrics and defects, drives root-cause and corrective-action efforts, reviews PPAP and FAI submissions, and leads continuous improvement toward zero defects. Partners with quality, category management, and supply chain teams while providing technical guidance on PWB standards, manufacturing processes, testing, and acceptance requirements. The remote role requires approximately 50% travel to suppliers across the country.

Build and own Arcadia’s internal developer platform across a large-scale data lakehouse and Kubernetes applications. Develop self-service APIs, templates, golden paths, CI/CD capabilities, observability, security controls, and reliability practices. Lead platform migrations, improve developer experience, manage stakeholder needs and costs, set technical direction, and coach senior engineers. The role requires hands-on software development alongside expertise in cloud infrastructure, Kubernetes, networking, infrastructure as code, SLOs, incident response, and platform product management.

Leads process hazard analyses, layer of protection analyses, and PSM/RMP compliance audits for complex client projects. Facilitates HAZOPs and other PHA methods, interprets process drawings, prepares technical deliverables, ensures quality, and provides engineering leadership. Manages project scope, schedules, budgets, staff assignments, and client relationships while mentoring engineers, supporting business development, and identifying process safety improvements.

Designs transistor-level mixed-signal CMOS circuits for advanced data converters, including amplifiers, comparators, switched-capacitor circuits, voltage and current references, and LDOs. Develops behavioral models, collaborates on architecture and layout, documents designs, conducts reviews, and supports hands-on laboratory evaluation. Requires strong circuit-design expertise, Cadence and SPICE experience, MATLAB modeling skills, and effective teamwork.

Own the B2B eCommerce platform end to end, delivering customer and internal commerce features across Next.js, React, TypeScript, Python, GraphQL, REST, and Azure services. Build production AI agents and LLM features using Claude technologies, operate cloud infrastructure with Terraform and CI/CD, improve observability and security, and resolve production issues. Serve as the technical owner for commerce architecture, core purchasing flows, integrations, database performance, and engineering quality while partnering with business stakeholders.

Leads the mechanical engineering domain for robotic recovery products, owning mechanical architecture, system integration, design, analysis, prototyping, validation, cost reduction, manufacturability, and production transfer. The role establishes CAD, FEA, tolerance, and design-review standards; partners with electrical, firmware, controls, suppliers, and contract manufacturers; mentors engineers; and supports technology roadmaps. Regular travel to the NYC office and supplier or manufacturing engagements, including international travel, is required as needed.

Lead end-to-end mechanical design and production scale-up for complex robotic modules. Develop electromechanical architectures, components, assemblies, and mechanisms optimized for reliability, manufacturability, cost, and high-volume production. Apply DFM/DFA, tolerance analysis, GD&T, materials and structural design expertise. Collaborate with engineering, manufacturing, quality, tooling teams, suppliers, and contract manufacturers to validate designs, resolve production issues, and transition products from prototypes through full-scale manufacturing. Provide technical leadership and establish scalable mechanical design standards.

Lead high-frequency PCB, backplane, cable, and flex-circuit design for rugged defense and first-responder applications. Own PCB design and layout using Cadence Allegro, conduct design reviews, establish CAD rules, support fabrication vendors, improve processes, and contribute to technology roadmaps and design experiments. Collaborate with systems, signal integrity, mechanical, software, and purchasing teams across multiple locations.

Provides senior engineering leadership for community-scale climate resilience. Assesses building, infrastructure, and natural-hazard vulnerabilities; develops performance-based mitigation recommendations; translates physical risk into modeling assumptions and insurance criteria; evaluates verified loss reduction; and guides implementation with property owners, communities, governments, utilities, underwriting, analytics, and catastrophe modeling teams. Requires expertise in natural catastrophe perils, building performance, construction, retrofits, and risk reduction.

Leads mechanical product development teams, mentors 3–15 engineers, supports complex technical projects, solves difficult design challenges, and coaches teams on project management, proposals, statements of work, and budgets. Collaborates with multidisciplinary teams and manufacturing partners to develop products from concept through production using varied manufacturing processes and CAD tools.

Lead design and build of production-ready cloud and AI systems, prioritize security and reliability, ship solutions quickly using modern engineering practices, collaborate with cross-functional teams, mentor engineers, drive customer adoption, and deliver reusable assets and end-to-end complex deliveries.

As a Principal Engineer - Steam Turbine, you will lead steam turbine engineering activities, mentor junior engineers, and support business development efforts while participating in client meetings and conferences.

Principal Engineer responsible for owning complex software initiatives from problem framing through architecture, implementation, deployment, production support, and continuous improvement. The role involves building web applications, services, APIs, MCP servers, data pipelines, and platform integrations; leading architecture and code reviews; improving security, reliability, and maintainability; mentoring engineers; and shaping technical strategy. The engineer will also use and improve AI-assisted development practices while maintaining human accountability for quality and operational outcomes.

Lead the architecture and technical direction of Forward Financing’s core fintech platform. Design scalable distributed backend systems, guide cross-team initiatives, establish engineering best practices, resolve incidents, and mentor engineers. The role owns the technical roadmap and architectural vision while partnering across teams to improve reliability, observability, code quality, and delivery. Ruby on Rails expertise is required, along with strong communication, influence, agile development experience, and a broad backend or full-stack perspective.

Develop and support systematic alternatives portfolio construction and management platforms. Collaborate with quantitative researchers, portfolio managers, software engineers, and quantitative developers to translate investment concepts into scalable technology. Build quantitative libraries, analytics engines, microservices, APIs, workflows, and distributed applications using Python and cloud technologies. Contribute to technical direction, requirements gathering, DevOps, CI/CD, infrastructure automation, production support, and stakeholder management.

Leads multidisciplinary systems engineering solutions across defense and space programs. Responsibilities include capturing stakeholder needs, developing requirements and architectures, conducting modeling, simulation, trade studies, and risk analysis, and guiding product-oriented solutions through the lifecycle. Leads teams of 5–10, mentors engineers, communicates with senior stakeholders, develops technical best practices, and serves as a digital engineering thought leader. The role also supports technology assessment, organizational transformation, new business development, proposals, and collaboration with experts across academia, government, and industry.