Top Principal Engineer Jobs in Boston, MA

The Principal Full Stack Software Engineer will design, develop, and mentor teams in building scalable web applications, influencing architecture and engineering standards in AI and cloud technologies.

Develop and implement AI validation methodologies, enhance application performance, collaborate with Agile teams, and lead AI testing efforts for healthcare products.

Lead development, integration, and qualification of semiconductor processes; drive yield, defect reduction, and cost optimization using DOE/SPC and data analytics; enable NPI transition to high-volume manufacturing; lead failure analysis and reliability efforts; collaborate with design, manufacturing, and foundry partners and mentor engineering staff.

The role involves designing and enhancing database engine components, optimizing algorithms, and maintaining programming language support, requiring extensive experience in low-level system code development.

The Security Engineering Manager oversees IT security policies, manages incident response, tracks threats, engages with IT teams, and provides regular incident reporting.

Lead multidisciplinary teams to design, develop, and transition advanced RF sensing and electronic warfare algorithms from concept to prototype. Architect signal processing, detection/classification, waveform and adaptive processing solutions, engage customers, mentor researchers, support proposals and business development, and verify system performance through modeling, simulation, and testing.

Lead long-term technical strategy and execution across multiple teams, architecting and evolving foundational frontend/backend systems and platforms at massive scale. Drive AI/ML adoption, solve ambiguous, high-impact problems, remain hands-on in critical system design and implementation, and align senior leaders on roadmaps and engineering standards.

The Principal Model-Based Systems Engineer will lead development programs using MBSE approaches, mentor teams, and implement digital engineering goals, focusing on DoD systems.

The Principal Signal Processing Engineer will lead the development and application of algorithms for RF sensing, engage with customers, guide teams, and drive business development.

The Principal Radar Systems Engineer leads radar system development, collaborates with multi-disciplinary teams, and ensures effective solutions to customer needs while applying systems engineering principles.

Lead the rearchitecture and implementation of Arcadia's User Management system, focusing on authentication and authorization frameworks. Drive new systems and mentor engineers to ensure secure data access and operational excellence.

Lead technical design and hands-on development of low-latency, event-driven trading and market data platforms. Drive architecture, engineering standards, CI/CD, observability, and AI-assisted tooling; collaborate with product and solution teams; mentor engineers; ensure resilient, secure, cloud-native solutions aligned with enterprise strategy.

Technical lead embedded with Investment Strategy & Capital Management to design and build full‑stack applications, productionize AI prototypes, enhance analytics and reporting, and partner with investment teams. Hands‑on architecting, iterating, and scaling data‑rich systems using Python and SQL in a hybrid Boston environment.

Technical lead embedded with investment teams to design, prototype, and productionize AI-enabled full‑stack applications for fixed income and investment analytics. Build scalable systems, partner with analysts, write robust Python code, develop front-end visualizations, and integrate Bloomberg/financial data into production workflows.

Design and build production-grade applications, tooling, and data pipelines to support portfolio construction, asset allocation analytics, and quantitative research. Convert AI prototypes into robust full‑stack solutions, contribute to shared quantitative libraries, and maintain dashboards and production systems to support investment decision‑making.

Lead design and delivery of a cloud-native BaaS payments platform. Architect scalable distributed systems, define API contracts, drive CI/CD and TDD practices, mentor engineers, reduce technical debt, and partner with product teams.

Lead architecture, design, and delivery of PET product features; write production full‑stack code; champion testing, observability, CI/CD and operational readiness; mentor engineers and collaborate with product to shape technical roadmap.

The Principal Engineer will lead the technical ecosystem, ensuring hands-on execution in a high-growth environment, focusing on AI integration and full-stack development.

Lead architecture and technical roadmap for Twilio's Compliance Experiences platform. Modernize legacy systems into cloud-native microservices, drive AI-augmented development (LLMs/agents), ensure reliability/security at scale, mentor senior engineers, translate regulatory requirements into developer-friendly APIs, and steer cross-team technical strategy and incident remediation.

Lead architecture and implementation of a high-performance OLAP query engine and semantic layer: design a JSON-based DSL and compiler, generate optimized SQL for columnar databases, build distributed caching, tune JVM and low-level performance, and provide technical leadership and documentation.

Build, operate, and secure cloud-native and edge infrastructure including Kubernetes, artifact pipelines, application streaming, and air-gapped appliances. Partner with product, GRC, and mission owners to design, deploy, and harden systems, remediate vulnerabilities, support audits (IL5/IL6/JWICS), and ensure trusted artifact delivery across environments.

Senior, client-facing principal to grow New Jersey land remediation practice. Responsibilities include business development, leading complex site investigation/remediation projects, technical oversight and review, NJDEP regulatory coordination with LSRP, project financial and staff management, mentoring staff, and promoting practice growth and technical excellence.

The Principal Engineer will lead AI-driven productivity initiatives, develop a strategy for integrating AI in engineering workflows, and improve collaboration across teams. Responsibilities include executing projects, ensuring code quality, and setting success metrics.

Lead the design of Xsolla's identity platform, develop Golang microservices for user management, and implement security protocols for compliance.

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.