Top Principal Engineer Jobs in Boston, MA

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.

Lead architectural design and hands-on implementation for UKG Ready software modules. Define technical roadmaps, architecture standards, CI/CD practices, observability, resilience, security, and cloud optimization. Collaborate with engineering, product, operations, and other stakeholders; evaluate emerging technologies; drive multi-year architecture strategy; document system architecture; mentor engineers; and leverage AI tools to improve engineering productivity and product capabilities.

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 mechanical design and product development for robotic and medical device systems. Designs complex mechanisms, flexible instruments, precision assemblies, and electromechanical components; evaluates existing designs for performance, cost, reliability, and manufacturability improvements. Provides technical leadership to engineering technicians, manages project priorities and deliverables, collaborates across disciplines, and supports prototyping, testing, troubleshooting, verification, validation, and commercialization.

Develops complex automated optical inspection and metrology platforms for semiconductor manufacturing. Defines technical requirements, architectures, and risk mitigation strategies; leads independent product development from ideation through market launch; performs root-cause analysis; and collaborates cross-functionally with program management, marketing, supply chain, production, field service, and engineering teams. Requires deep expertise in optical or imaging instruments, semiconductor inspection, metrology, and systems engineering, with international customer travel of at least 20%.

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.

Provides hands-on technical leadership for robotic inspection systems, owning systems engineering, architecture, integration, verification, troubleshooting, and production transition. Leads multidisciplinary teams across mechanical, electrical, controls, embedded computing, sensing, and software; manages requirements, interfaces, trade studies, testing, manufacturing readiness, field demonstrations, and technical risk. Mentors engineers and supports proposals, customer engagements, intellectual property, and technology roadmaps.

Develops scalable quantitative investment technology supporting alpha research, portfolio construction, risk management, and systematic strategies. Builds full-stack Python and database solutions, quantitative models, data pipelines, APIs, cloud infrastructure, batch workflows, and CI/CD systems. Partners with quantitative researchers and investment teams to deliver production-ready solutions. Preferred experience includes MLOps, machine learning, generative AI, optimization libraries, and responsible AI practices.

Develop and evaluate signal processing, image processing, machine learning, and computational algorithms for ultrasound-enabled medical devices. Implement real-time software, analyze bench, preclinical, and clinical data, validate algorithms, assess technical feasibility, and guide design decisions. Collaborate with engineering, clinical, design, and research teams while providing technical leadership and mentorship in algorithm development for cardiac electrophysiology applications.

Leads the design and implementation of highly scalable Azure messaging and PubSub services. Defines architecture, testing strategies, coding standards, and reusable engineering frameworks; mentors engineers and conducts design and code reviews. Drives incident response, root-cause analysis, service reliability, SLA compliance, and operational improvements. Partners with stakeholders and customers to shape requirements and product direction, while advancing responsible AI practices throughout the software development lifecycle.

Principal Software Engineer leading architecture and hands-on development for Swiftly’s multi-tenant ads and martech platform. Responsibilities include designing distributed systems, migrating legacy services without downtime, optimizing a low-latency Go ad server, defining database and service contracts, integrating ad-tech platforms, operating Azure production services, and setting engineering quality standards across testing, observability, CI/CD, security, and infrastructure.

Develop and update detailed mechanical designs, models, drawings, and assemblies for complex accelerator systems. Use Creo and Windchill to manage designs, revisions, and released documentation. Apply GD&T and design-for-manufacturability principles while collaborating with engineering, manufacturing, technicians, and operations teams. Support configuration management, engineering changes, design reviews, troubleshooting, prototype fabrication, assembly modifications, and applicable pressure-system and ASME B31.3 requirements.

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.

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.

Provides senior technical leadership and hands-on Salesforce development across an application portfolio. Designs scalable cloud applications, leads Agile and DevOps practices, develops Apex and Lightning Web Components, manages architecture and data, drives performance and quality improvements, troubleshoots complex issues, and mentors engineering teams. The role also supports technical strategy, research, prototypes, open-source engagement, and collaboration with management and clients.

Leads architecture, development, testing, and deployment of hyperscale distributed storage systems optimized for AI and machine learning workloads. Drives innovations in scalability, performance, security, durability, and efficiency; collaborates with AI and cloud infrastructure teams; mentors engineers; and evaluates emerging technologies for AI-native storage.

Architects, deploys, and manages secure, automated networking across AWS, Azure, and hybrid-cloud environments. Designs Spine-Leaf infrastructure, optimizes Direct Connect and ExpressRoute connectivity, and leads multi-cloud infrastructure vision. Serves as an Infrastructure as Code subject matter expert using Terraform and Ansible, troubleshoots networking and security issues, documents solutions, collaborates with stakeholders, and participates in tier 3 on-call support.

Lead research, architecture, and production development of hardware formal verification tools enhanced by agentic AI. Build formal verification algorithms, multi-agent systems, solver orchestration, RTL analysis, automated SystemVerilog Assertion generation, and high-performance C/C++ implementations for commercial EDA suites. The role requires deep expertise in formal methods, hardware verification, AI frameworks, RTL languages, and 15+ years developing advanced EDA tools.

Architects scalable distributed systems and low-level cloud platform services, establishes engineering standards and SLOs, designs CI/CD and deployment safety pipelines, leads complex incident escalations and postmortems, and mentors engineering teams. The role requires full-stack, API, and microservices development in Linux or Unix environments, strong SRE expertise, architectural leadership, and US citizenship with eligibility for security clearance.

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.

Develops, tests, documents, maintains, and enhances software solutions using Appian and related technologies. Integrates Appian with external systems and services, resolves technical problems, remediates security vulnerabilities, improves performance, and participates in planning and user-story analysis. The role follows software development processes, documents standards, and mentors engineers while helping prioritize work for a development team.

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.