Top Principal Engineer Jobs in Boston, MA

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.

Lead the architecture and strategy for onboard GPU execution in Zoox autonomous vehicles. Define GPU scheduling, multi-tenancy, isolation, deterministic latency, compute budgets, hardware selection, and inference performance direction. Drive end-to-end reductions in latency, utilization, power, and cost across models, runtimes, middleware, and hardware. Provide technical leadership, mentor senior engineers, align cross-functional teams, and lead platform bring-up and performance optimization.

Own Bitsight’s cloud platform architecture, availability, Kubernetes operations, Terraform infrastructure modules, AI platform infrastructure, data residency, observability, and cloud cost controls. Lead incident response, set service reliability objectives, mentor engineers, establish reusable self-service tooling, evaluate platform technologies, and provide technical direction across AWS, GCP, and Azure.

Leads full-stack software development for quantitative research and investment applications, including portfolio construction, risk management, and alpha research. Builds reliable, scalable, cloud-based analytical tools and supports them through the software development lifecycle. Partners with quantitative researchers, investment professionals, and senior stakeholders to develop models, products, and robust solutions using advanced analytics, statistics, econometrics, and software engineering practices.

Lead the architecture and development of high-throughput streaming infrastructure processing over one million messages per second with sub-second latency. Responsibilities include scaling real-time computation, improving caching, designing message deduplication, enabling zero-downtime deployments, delivering customer-focused projects, shaping the technical roadmap, and mentoring engineers.

Lead hands-on embedded firmware development, architecture, debugging, integration, and production support. Develop RTOS-based firmware, drivers, and communication stacks; integrate software with custom hardware, sensors, and control systems; troubleshoot board-level issues using bench tools; lead technical reviews and roadmap planning; mentor engineers; improve development processes; and communicate technical risks and solutions to engineering and customer stakeholders.

Architect and develop bare-metal C firmware for RISC-V management cores controlling AI/HPC networking acceleration engines. Responsibilities include secure firmware loading, image authentication, boot and reset sequencing, health validation, multi-die firmware distribution, updates, hardware/software interface definition, simulator-based testing, architecture standards, code reviews, and technical mentorship.

Lead mechanical and systems engineering for HaloBraid, owning machine architecture and major subassemblies from CAD through pilot and production. Identify design, tolerance, assembly, serviceability, and dependency issues; establish testing and decision frameworks; apply DFM/DFA principles; support supplier and contract-manufacturer handoff; review designs; collaborate across electrical, industrial design, manufacturing, and suppliers; and mentor engineers.

Lead hands-on development of scalable full-stack web applications and core platform services for a clinical data and analytics platform. Influence architecture, engineering standards, security, reliability, and maintainability; mentor engineers; resolve distributed-system production issues; and collaborate across product and QA. Integrate LLMs, AI-assisted workflows, and agentic patterns into secure .NET and Python enterprise systems while supporting documentation, compliance, and the full software development lifecycle.

Own validation strategy and end-to-end testing for robotic hardware, including PCBAs, actuators, grippers, and robotic arms. Design automated test equipment, fixtures, and reusable infrastructure; execute functional, environmental, stress, and reliability testing; investigate failures; and drive corrective actions. Lead certification activities, documentation, and cross-functional testability improvements while mentoring engineers and informing hardware release decisions.

Staff and Principal Software Engineers will own large technical domains end to end, making architecture decisions, building scalable backend systems, improving reliability and performance, and collaborating with product, leadership, and customers. Responsibilities include mentoring engineers, driving cross-team technical decisions, and shipping production solutions. Potential areas include AI telemetry, billing ingestion, cloud data infrastructure, integrations, identity, cost optimization, and customer-facing applications.