Top Principal Engineer Jobs in Boston, MA

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.

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.

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.

Leads systems engineering for a safety-critical surgical robotic platform across its product lifecycle. Defines system architecture, requirements, interfaces, risk management, verification strategies, and design controls. Coordinates hardware, software, controls, mechanical, clinical, quality, manufacturing, and V&V teams. Supports regulatory submissions, reliability, design transfer, product launches, nonconformance investigations, CAPA, and post-market activities while applying MBSE and UML methods.

Leads software test development, algorithm design, system architecture, requirements analysis, technical documentation, and risk mitigation for mission-oriented projects. The role independently solves complex customer problems, communicates with stakeholders, serves as a subject matter expert, and leads a multidisciplinary engineering team through design, testing, deployment, and delivery in an Agile environment.

Own the architecture, roadmap, security, and operation of Lila’s global multi-site network spanning corporate, laboratory, and OT environments. Design SD-WAN/SASE, firewalls, segmentation, remote access, monitoring, and IT/OT convergence. Lead migrations, incident escalations, vendor and MSP management, technical standards, runbooks, and network engineering capability development. Mentor engineers and advise leadership on reliability, security, cost, and delivery tradeoffs.

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.

Build and maintain content ingestion pipelines, migrate legacy Perl systems to Python and containerized services, implement durable workflows, troubleshoot production issues, and apply AI, ML, NLP, and LLMs to content processing. The role also spans backend services and customer portals using PHP and React/TypeScript, requiring strong production engineering judgment, operational skills, collaboration, and ownership from problem discovery through deployment.

Lead analog and mixed-signal circuit design for semiconductor chips, owning major architecture areas from concept through fabrication. Design circuits, create physical layouts, perform DRC, ERC, and LVS checks, and collaborate across engineering disciplines. Characterize returned silicon using bench test equipment. The role requires CMOS expertise, Cadence simulation proficiency, multiple fabricated chips, and a master’s or PhD in Electrical Engineering.

Leads complex infrastructure migrations, systems integration, enterprise troubleshooting, security tool deployments, infrastructure-as-code automation, and performance engineering. Investigates outages using packet analysis, log correlation, and kernel debugging across Windows, Linux, and Cisco environments. Requires advanced network and systems expertise, federal or defense experience, high-level certifications, a technical degree, and Secret or potentially Top Secret clearance.

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.

Design and simulate advanced digital ASICs from architecture and RTL through synthesis, optimizing performance, power, and cost. Lead complex chip designs, evaluate algorithm feasibility, guide physical layout and design-for-test activities, and contribute to system-level design and proposals. Develop specifications, solve ambiguous technical problems, mentor engineers, and lead multidisciplinary teams. The role requires advanced semiconductor design expertise, successful tape-out experience, and an active U.S. Secret clearance with onsite work in Cambridge, Massachusetts.

Build and operate scalable AWS cloud infrastructure for GenAI investment research products. Responsibilities include managing containerized applications, developing infrastructure as code, optimizing CI/CD pipelines, monitoring reliability and security, automating operations, establishing disaster recovery and service objectives, participating in incident response, and contributing to Python/FastAPI microservices. The role collaborates across engineering, data science, and product teams and requires on-call participation.