Top Principal Engineer Jobs in Boston, MA

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.

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.

Designs, develops, and maintains automated testing solutions across non-production and production environments. Integrates automated workflows with Jenkins and CI/CD pipelines, performs API testing with Postman Enterprise, validates databases using SQL, and supports JSON/XML-based orchestration. Collaborates with Java and C development teams to investigate defects and improve test coverage. Provides technical leadership, mentors colleagues, promotes automation best practices, and helps integrate AI tools into daily engineering workflows.

Lead technical ownership of InfiniBand and GPU interconnect fabric operations for hyperscale AI supercomputers. Drive incident response, deep multi-layer debugging across hardware/firmware/drivers/OS, and define failure models, playbooks, telemetry, and automation to improve reliability, observability, and scalability of GPU clusters and platform SLAs.

Develop and advance ServiceNow ITSM workflows, automations, scoped applications, service catalogs, CMDB structures, integrations, and platform governance. Configure and troubleshoot REST/SOAP APIs, IntegrationHub, MID Servers, data imports, upgrades, cloning, and Automated Test Framework execution. Collaborate with product owners and technical stakeholders in Agile/Scrum environments, contribute to solution design and proposals, lead ceremonies, mentor staff, estimate work, and improve delivery methodologies.

Lead architecture, development, scaling, and reliability for SingleStore Helios, a multi-cloud SaaS platform. Design Kubernetes operators, controllers, networking, routing, and distributed control planes across AWS, Azure, and GCP. Build resilient Go and Python systems, support AI and vector workloads, resolve complex Tier-3 production incidents, and maintain compliance controls. Mentor engineers, author architecture documents, and influence cross-functional technical strategy.

Lead architecture and hands-on development of Azure Kubernetes Service capabilities for AI workloads. Design secure, reliable, scalable distributed systems; coordinate engineering teams; define testing and deployment strategies; improve observability and operational readiness; investigate production issues; and mentor engineers while advancing engineering practices.

Develops, qualifies, and maintains semiconductor wafer-fab metrology recipes and equipment performance. Creates sampling plans, analyzes process data, monitors SPC, investigates excursions, supports failure analysis, and troubleshoots process and equipment issues. The role also develops specifications and procedures, trains production personnel, and supports technology development, qualifications, transfers, and production ramps for PIC wafer fabrication.

Lead design and implementation of Azure full‑stack, scalable skilling platform features. Drive CI/CD, reliability, automation, and AI/LLM-enabled capabilities. Mentor engineers, enforce engineering best practices, coordinate cross-team dependencies, and improve test automation and observability for enterprise-scale services.

Leads platform architecture and hands-on infrastructure engineering across multi-tenant Kubernetes, infrastructure as code, CI/CD, cloud identity, security compliance, observability, and AI development environments. Designs scalable runtime, networking, identity, policy, and delivery systems while enforcing isolation and auditability. Owns strategic architecture decisions, reliability and security evidence, developer outcomes, and technical mentorship.

Own the technical vision and architecture for ServiceTitan’s iOS and Android mobile platform. Design scalable, reliable, secure, and high-performing systems; modernize monolithic codebases; improve observability, developer productivity, CI/CD, testing, and release processes. Mentor engineers, influence mobile strategy, define success metrics, support recruiting, and collaborate with cross-functional stakeholders. The role is approximately 60% development and requires expertise in native mobile development, performance engineering, modular architectures, and cloud-supported mobile backends.

Provides principal-level technical leadership for scalable learning and skilling platforms. Designs architectures, writes and reviews production software, leads full software lifecycles, and applies Azure, AI, Copilot, Power Platform, and custom solutions. Responsibilities include secure integrations, CI/CD, infrastructure as code, testing, observability, production support, Responsible AI, reusable components, cross-team technical alignment, and engineering mentorship.

Lead the strategic direction of frontend engineering, architecture, tooling, and standards. Build accessible, high-performing React or Angular applications, component libraries, design systems, deployment pipelines, and testing strategies. Drive modernization, performance, accessibility, and developer-experience initiatives while collaborating with product and design teams. Mentor engineers, influence cross-team technical decisions, and contribute across the full stack when needed. The role is remote, requires U.S. citizenship and the ability to obtain Public Trust 6C, and involves up to 10% travel.

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.

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.

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 technical strategy and architecture for Azure Storage geo-replication, data protection, failover orchestration, and business continuity. Drive cross-team delivery, operational excellence, telemetry, automation, AI-assisted operations, and represent the team in executive and customer engagements.

Design, build, test, and support EPIC integration solutions across the full interface lifecycle. Gather requirements, resolve integration issues, develop standards and documentation, and provide production support within a remote, volunteer, part-time setup.

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.

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.

Leads backend software design and delivery for a healthcare revenue cycle product. Owns system architecture, technical decisions, reliability, testing, observability, and production readiness across an enterprise monolith and newer platform services. Establishes engineering standards, mentors engineers, collaborates with product and architecture teams, and guides responsible adoption of AI-assisted development tools.