Top Principal Engineer Jobs in Boston, MA

Owns company-critical, long-term technical problems across multiple teams and organizations. Defines technical strategy, architectures, roadmaps, and engineering standards for large-scale customer-facing systems. Remains hands-on in software development while driving AI adoption in products and engineering workflows. Partners with senior product, engineering, and executive leaders to resolve complex problems, improve reliability and performance, and shape Dropbox’s technical direction.

Define Scribd’s technical vision for agentic engineering and establish architecture, patterns, and guardrails for AI-assisted software development. Lead internal developer tools, libraries, platforms, and engineering workflow improvements across codebases, CI/CD, and infrastructure. Partner with engineering leadership on ambiguous cross-organizational initiatives, mentor senior and staff engineers, and drive adoption of coding-agent capabilities throughout the organization.

Lead architecture and design of advanced mixed-signal CMOS ICs for pin electronics testing. Responsibilities include PLL design, multi-GHz clock distribution, multi-chip synchronization, phase interpolation, timing-error correction, and receive-path architecture involving CTLE, PGA, and A/D converters. The role requires multiple tapeouts, analog/RF design expertise, PCB and RF measurement experience, and technical leadership in high-performance semiconductor development.

Lead the architecture and implementation of NVIDIA’s large-scale data retrieval platform for foundation-model training. Build web crawling, source discovery, indexing, scheduling, fetching, ingestion, provenance, and policy-enforcement systems. Ensure production reliability, scalability, observability, and cost efficiency while supporting open-web, licensed, partner, code, STEM, and multimodal data. Partner across engineering, research, product, legal, privacy, and governance teams, mentor engineers, and set technical direction.

Lead architecture and hands-on development for AccessOne’s financing platform across frontend, backend, data systems, integrations, and cloud infrastructure. Modernize production systems, build accurate and auditable financial workflows, lead complex initiatives through deployment, and establish engineering practices. Use AI coding tools responsibly while ensuring software quality, security, testing, reliability, and maintainability.

Own the architecture, roadmap, reliability, and scalability of AlphaSense’s cloud-native Data Platform. Build large-scale data migration capabilities across cells, regions, and geographies; enable self-service storage provisioning; and drive data placement, replication, tenant routing, and isolation. Partner with Cloud Platform, SRE, and DevEx teams, establish managed-first standards, identify scalability risks, contribute code across teams, and mentor senior engineers.

Principal Engineer responsible for defining technical vision, designing and delivering large-scale distributed systems, writing production code, and guiding major architectural decisions. The role establishes engineering standards, develops reusable systems, mentors senior engineers, supports roadmap and resource planning, and contributes to technical hiring. Key work includes cloud infrastructure, data architecture, AI/ML and LLM systems, monolith-to-microservices migrations, scalability, reliability, security, performance, and observability.

Develops advanced signal processing and machine learning algorithms for radar, RF sensing, and electronic warfare applications. The role involves customer engagement, system capability development, prototype demonstrations, subsystem requirements, technical leadership, proposal support, and collaboration with multidisciplinary engineering and research teams. The engineer will lead researchers and apply algorithms from mathematical derivation through testing and performance verification.

Provides technical leadership for semiconductor product enablement from development through qualification, technology transfer, manufacturing ramp, and high-volume production. Connects product requirements with device physics, silicon technology, process integration, fab execution, yield, reliability, and product performance. Leads device development, process transfers, technical problem resolution, data analysis, risk mitigation, qualification, technology roadmaps, and manufacturing strategy while mentoring senior engineers.

Principal Engineer responsible for architecting, building, testing, deploying, and operating full-stack TypeScript applications. The role leads React and Next.js front ends, Node.js services, APIs, cloud infrastructure, integrations, databases, CI/CD, observability, security, and AI capabilities. It owns products end to end, establishes engineering standards, partners with creative and operations teams, and provides technical leadership on client projects. Strong autonomy, communication, architecture, and production operations skills are required.

Architects and optimizes embedded Layer 2/Layer 3 protocol stack software for 4G/5G cellular systems. Develops new product capabilities, interprets communications standards, troubleshoots complex customer defects, and collaborates with distributed engineering teams to integrate, validate, and improve system performance.

Develop and lead enterprise full-stack applications using Java, Spring Boot, Node.js, React, AWS, APIs, and distributed technologies. Design scalable architectures, modernize applications, establish engineering standards, troubleshoot production issues, improve observability and performance, and support containerization and site reliability. Mentor engineers, collaborate with product and cross-functional teams, guide technical decisions, and drive agile delivery, automated testing, CI/CD, and resolution of technical debt.

Lead architecture, development, optimization, validation, and production deployment of reusable audio DSP components across multiple product platforms. Translate MATLAB/Simulink algorithms into optimized C/C++ for embedded DSPs and processors, guide fixed- and floating-point implementations, perform hardware bring-up and lab debugging, and establish validation and engineering standards. Mentor engineers and provide technical direction across distributed, cross-functional teams.

Own the implementation, hardening, and polish of game AI behaviors and systems for shipping. Collaborate with design, animation, and other disciplines to tune AI features and support the creative vision. Ensure reliable, stable enemy behaviors and enhance existing architecture. The role requires deep Unreal Engine and modern game AI experience, strong C++ skills, animation systems knowledge, and at least one shipped game title focused primarily on AI.

Lead end-to-end technical initiatives for an IoT cloud platform, shaping architecture, strategy, and roadmap. Build and scale React/TypeScript frontends, Python backends, cloud infrastructure, databases, and data systems. Improve developer experience, operate production systems, establish engineering standards, mentor engineers, and influence technical direction across teams. Collaborate closely with product and design while delivering reliable systems for monitoring, debugging, and updating connected devices.

Lead the mobile engineering team in evolving iOS and Android applications toward an AI-native, thin-client architecture. Define participant API and platform direction, contribute Python to backend services, establish AI-assisted development processes, improve DevOps and continuous delivery, mentor engineers, and partner closely with Product and Design. The role requires principal-level technical leadership, product focus, system architecture expertise, and hands-on use of AI coding agents.

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.

Serves as a hands-on cloud platform engineering lead and escalation point. Designs, operates, and automates Azure and hybrid infrastructure, including identity, networking, compute, storage, security, Microsoft platforms, CI/CD, and Infrastructure as Code. Owns backup, disaster recovery, cyber resilience, platform lifecycle, cost optimization, compliance, and vendor collaboration. Supports emerging technology evaluation and may provide technical leadership or management oversight.

Leads reliability and cloud infrastructure for Medtronic’s AWS-based healthcare platform. Responsibilities include managing Terraform infrastructure across regions and environments, improving observability and incident response, developing CI/CD pipelines and developer tooling, and partnering on architecture, security, scalability, cost, and compliance. The role supports containerized workloads, GPU infrastructure, data pipelines, and regulated healthcare requirements while collaborating with engineering and cloud teams across the United States and Europe.

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.

Designs and develops Go microservices, Kubernetes controllers, and Linux networking software for HPE enterprise storage systems. Builds highly available distributed services, automates data-center network switch management and upgrades, develops software distribution services, and creates comprehensive automated tests. Troubleshoots customer issues, reviews designs and code, collaborates across storage and cloud teams, and mentors engineers.

Leads architecture and hands-on development of WEX’s semantic data platform and Data-as-a-Service capabilities. Builds reusable semantic business objects, metadata and ontology frameworks, knowledge graphs, APIs, governance, lineage, quality, and data contracts. Solves distributed-systems and scalability challenges while enabling AI and agentic applications to use trusted enterprise data. Partners across engineering, product, analytics, risk, finance, and business teams; influences technical standards, drives adoption, mentors engineers, and remains involved in implementation.

Designs and delivers large-scale Spring Boot and React applications, reusable APIs, microservices, and cloud-native solutions. Leads application architecture, reliability, security, observability, testing, deployment, and QA readiness across complex projects. Uses AWS, Docker, Jenkins, and Nomad to build scalable systems, advises on technical strategy and risk, coordinates project delivery, resolves technology issues, documents solutions, and mentors junior engineers.

Lead architecture and scaling for UKG Ready’s multi-tenant SaaS platform serving tens of thousands of customers. Own architectural governance, cloud and platform standards, AI/ML production integration, responsible AI practices, M&A technical diligence and integration, operational reliability, and cross-functional alignment. Deliver architecture roadmaps, MLOps patterns, integration playbooks, and technical documentation while mentoring senior engineers and architects as a hands-on strategic individual contributor.