Top Principal Engineer Jobs in Boston, MA

Own enterprise scalability, performance, reliability, and multi-region readiness for a large SaaS platform. Identify and remove bottlenecks, lead architectural changes involving distributed systems, establish scale-readiness metrics, build benchmarking and profiling tools, improve incident outcomes, and guide teams through technical influence. The role requires hands-on engineering, executive communication, cross-functional leadership, and practical application of AI to engineering investigations and operations.

Own enterprise scalability, performance, reliability, and multi-region readiness for Klaviyo’s multi-tenant SaaS platform. Identify and resolve bottlenecks, design distributed-system improvements, establish scale-readiness metrics, build benchmarking and profiling tools, lead scalability reviews, improve incident response, and guide high-volume migrations. The role requires hands-on engineering, architectural judgment, cross-functional influence, executive communication, and responsible application of AI to engineering operations.

Lead the design, development, modernization, and integration of cloud-based enterprise applications. Build full-stack solutions using Java, Spring Boot, Node.js, React, APIs, databases, and distributed technologies. Establish engineering standards, architecture, observability, CI/CD, and testing practices while troubleshooting production issues. Mentor engineers, guide technical decisions, collaborate with cross-functional teams and vendors, and drive platform reliability, performance, and technical debt reduction.

Build full-stack Python applications, data pipelines, AI-enabled workflows, and reporting tools for private markets investment analysis. Partner with portfolio strategy teams to transform prototypes into secure, reliable, production-ready systems. Develop forecasting, portfolio exposure, performance reporting, and decision-support solutions while maintaining enterprise-quality repositories, validation, documentation, logging, and operational support.

Lead multidisciplinary teams developing advanced RF sensing, radar, and electronic warfare algorithms from research concepts through operational prototypes. Architect signal processing, detection, classification, decision-making, and counter-sensing solutions; engage customers, mentor technical staff, support proposals, and transition innovative technologies into defense capabilities. The role requires extensive radar or EW experience, strong mathematical and programming skills, technical leadership, and the ability to obtain a U.S. security clearance.

Provides technical leadership for real-time, high-throughput trading and market data platforms supporting institutional public-markets workflows. Designs low-latency, event-driven, API-first architectures; establishes engineering standards; leads design reviews; promotes CI/CD, testing, observability, and responsible AI use; collaborates with product and architecture stakeholders; and mentors engineers. Requires strong Python and AWS experience, distributed-systems expertise, and familiarity with regulated financial services.

Principal Engineer responsible for defining the long-term architecture and modernization strategy for GitLab’s Fulfillment platform. The role drives technical direction across entitlements, licensing, provisioning, seat management, usage visibility, and cost management. Responsibilities include hands-on distributed systems engineering, migrations, performance and reliability improvements, cross-team influence, AI-assisted engineering adoption, and mentoring senior technical staff.

Leads technical strategy, architecture, and engineering execution across Atlassian’s Rovo Chat, Search, Growth, Apps, and Clients experiences. The role drives scalable AI foundations, Search and Chat convergence, personalization, experimentation, reliability, security, and operational excellence. It involves leading cross-organizational initiatives, partnering with product, design, data science, and machine learning teams, mentoring senior engineers, and shaping multi-year technical roadmaps for customer-facing applications.

Serves as the technical lead for investment technology, designing and building prototypes and production-ready applications for fixed income analytics, AI-enabled workflows, reporting, and investment decision-making. Partners with investment teams to improve AI-generated artifacts, develops scalable full-stack systems, and applies financial data, statistical, and time-series analysis. The role requires strong Python, SQL, front-end, Bloomberg, and software architecture expertise while operating as a senior individual contributor.

Leads technical direction, system architecture, and execution for multidisciplinary robotic joint-replacement solutions. Integrates mechanical, electrical, software, controls, sensors, and actuation systems; guides verification, validation, design controls, DFMEA, manufacturability, and regulatory support. The role coordinates cross-functional teams and external partners, translates customer and business needs into technical requirements, communicates strategy to leadership, supports commercialization, and mentors engineering staff.

Architect and operate scalable cloud and virtualized lab platforms for global sales engineering teams. Build automated cybersecurity demonstrations simulating malware, exploit paths, and detection workflows. Lead self-service tooling, product demonstration readiness, infrastructure reliability, outage resolution, security governance, and major conference technical operations. Partner with Product Management, Engineering, Information Security, and Platform Engineering while providing technical leadership across complex infrastructure initiatives.

Leads software teams developing, integrating, deploying, and maintaining full-stack mission applications for DoD and intelligence customers. Builds prototypes, scales applications, develops responsive frontend features, integrates systems, collaborates with government operators, and conducts deployment and field testing in secure environments. The role requires customer relationship management, technical leadership, software engineering expertise, and active security clearance.

Leads systems engineering for flight management avionics, including software requirements definition, hardware and software integration, deployment, troubleshooting, laboratory test-bench integration, and verification and validation. Provides technical leadership for complex engineering projects and ensures compliance with aviation certification, security, and systems engineering standards. Requires extensive Flight Management or Flight Guidance experience and collaboration with software and systems engineering teams.

Leads technical delivery and governance for Microsoft 365 Modern Work and enterprise AI platforms. Owns solution design, implementation, change control, automation, incident escalation, root cause analysis, documentation, and continuous improvement. Provides technical authority across Teams, SharePoint, OneDrive, Exchange, Copilot, Copilot Studio, GitHub Copilot, Power Platform, agents, and AI governance. Partners with business, security, privacy, legal, compliance, identity, vendors, and operations teams in a regulated enterprise environment.

Leads electrical architecture, design, development, testing, verification, validation, and lifecycle support for infusion devices. Designs analog, digital, mixed-signal, and power circuits; troubleshoots complex equipment and system issues; evaluates risks and test results; ensures compliance with medical electrical safety and EMC standards. Establishes documentation practices, advises management, collaborates cross-functionally, and mentors or supervises engineers and test personnel.

Serve as a hands-on cloud architect for the Engineering Platform organization. Design AWS-based system architectures, build Terraform and application prototypes, establish reusable cloud-native patterns, and guide SaaS maturity, security, compliance, resilience, cost management, and AI workloads. Partner with engineering teams and AWS architects, improve self-service infrastructure and governance, document technical decisions, influence technical direction, mentor senior engineers, and lead cloud-native workshops.

Provides enterprise-wide technical leadership for network and information systems infrastructure across multiple sites. Designs, deploys, monitors, and modernizes LAN, WAN, wireless, voice, server, storage, identity, virtualization, and cloud environments. Leads complex incidents and major network projects, establishes technical standards, evaluates emerging technologies, supports security and compliance, mentors engineers, and advises senior leadership on architecture and operational performance.

Leads development of advanced electromechanical and electro-fluidic medical devices from feasibility through verification, validation, regulatory submission, and manufacturing transfer. Responsibilities include sensor and data acquisition system design, embedded systems, Python-based signal processing, polymer device design and manufacturing, biocompatibility programs, fluid mechanics, CAD and GD&T, risk management, design controls, technical documentation, regulatory support, and mentoring engineers.

Leads architecture, development, optimization, validation, and production deployment of reusable audio DSP technology across product platforms. Translates MATLAB/Simulink algorithms into C/C++, optimizes fixed- and floating-point implementations on embedded processors, performs hardware bring-up and lab debugging, establishes validation standards, and mentors distributed engineering teams. The role requires deep DSP expertise, technical leadership, and onsite collaboration in Framingham, Massachusetts.

Lead architecture and technical direction across multiple engineering teams. Drive large-scale refactoring, domain decomposition, cross-team technical decisions, AI-native engineering practices, production coding, testing, observability, reliability, technical planning, and engineering standards. Mentor senior technical staff, influence hiring and leveling, and partner with Product, Design, and engineering leadership to deliver foundational platform improvements.

Lead architecture and implement large cross-cutting initiatives on a SaaS grantmaking platform. Produce high-quality full‑stack code (Rails/React/Node), mentor engineers, drive SDLC best practices, and champion AI-assisted development while collaborating with product, infra, and QA teams.

Leads the design, evolution, and migration of enterprise test automation frameworks and infrastructure. Builds Playwright and C#/.NET web automation, REST API and database validation, parallel execution, ephemeral environments, and CI/CD testing workflows. Provides technical leadership, code reviews, mentoring, architecture guidance, and organization-wide automation strategy. Collaborates with engineering, DevOps, architecture, and QA teams to advance shift-left testing, continuous testing, reliability, and scalable cloud-native quality practices.

Provides technical leadership for signal and power integrity across HPE storage platforms. Defines SI/PI strategies, PCB stackups, routing and validation standards; architects high-speed SerDes systems; leads simulations, laboratory correlation, root-cause investigations and cross-functional technical reviews. The role evaluates emerging technologies, mentors engineers, drives innovation through patents and publications, and serves as the final escalation point for complex SI/PI decisions.

Leads the technical vision and architecture for a new platform and business line. Designs scalable APIs, data pipelines, distributed systems, and third-party integrations while ensuring reliability, observability, and maintainability. Provides hands-on C#/.NET development, guides contractor teams, translates business requirements into delivery plans, manages technical risks and dependencies, and establishes AI-assisted engineering practices using tools such as Claude Code.

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.