Principal Data Engineer Recorded FuturePrincipal Data EngineerBoston, MA$152,000–$228,500 / yearWork with the Malicious Sites, Identity, and Surface Web teams to align, analyze, and ingest digital risk data streams into Digital Risk Protection systems and the Intelligence Graph. Create technical project plans and drive the successful execution of DRP initiatives, with input from our Product team and other developers on your team.
Principal AI Product Engineer Hi MarleyPrincipal AI Product EngineerBoston, MA$152,000–$283,000 / yearThat means understanding how data flows through the company and exposing it at the right level for the right audience; designing our internal knowledge systems, the surfaces by which we make decisions, and the patterns by which teams build and design agents; and making the call — over and over — about what should be centralized and what should live with the team. At Hi Marley, our culture is built on three core values that every employee embodies: Max Courage – We encourage our team, our customers, and their customers to dream big, try new ideas, and maximize impact by measuring risk.
Principal Software Engineer (Angular/.NET) Aquinas ConsultingPrincipal Software Engineer (Angular/.NET)100 Federal Street Boston, MAIn this job, you will design and deliver scalable, cloud-native applications, lead engineering efforts across the full software development lifecycle, and provide technical leadership to support enterprise technology platforms. Principal Software Engineer job responsibilities: Architect and develop scalable, cloud-native applications using Microsoft Azure and modern enterprise architecture principles.
NewSenior Principal Hardware Design Engineer RTXSenior Principal Hardware Design EngineerTewksbury, MassachusettsThese design efforts will include collaboration with systems engineers, mechanical engineers, manufacturing engineers, and other electrical engineers to perform design trades and requirements flow down, perform electrical analysis, develop test plans, and ultimately to deliver working hardware that meets program requirements. Ability to obtain INTERIM U.S. government issued security clearance is required prior to start date At RTX, the world's largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world’s most complex problems.
Principal Software Engineer, Enterprise Scalability KlaviyoPrincipal Software Engineer, Enterprise ScalabilityBoston, MA$244,000–$366,000 / yearAI‑assisted scale engineering: AI‑driven anomaly detection reduces alert noise while improving signal; generative load testing and copilot runbooks are used in release/readiness checks for the top critical services; time‑to‑isolate regressions drops 20-30%. In addition to base salary, our total compensation package may include participation in the company's annual cash bonus plan, variable compensation (OTE) for sales and customer success roles, equity, sign-on payments, and a comprehensive range of health, welfare, and wellbeing benefits based on eligibility.
Principal Integration and Test Engineer The Charles Stark Draper LaboratoryPrincipal Integration and Test EngineerCambridge, MassachusettsDraper supports many programs to improve work-life balance including workplace flexibility, employee clubs ranging from photography to yoga, health and finance workshops, off site social events and discounts to local museums and cultural activities. As a Principal Systems Test Engineer, you will be responsible for leading a large integration and test task of 10-15 engineers, managing all test development and execution activities associated with MEMS IMU system testing.
Principal Full Stack AI Engineer Vertex PharmaceuticalsPrincipal Full Stack AI EngineerBoston, MassachusettsThe ideal candidate is a versatile engineer who is comfortable across the stack including backend services and APIs, agent frameworks and orchestration, data and retrieval pipelines, and lightweight front-end experiences with real depth in enterprise integration design, MCP/A2A protocols, event-driven architectures, and authentication patterns. In this role you will develop AI agents and the services, APIs, and interfaces around them, and connect the platform to the systems, tools, and data sources that make AI valuable in real enterprise workflows.
Principal Mechanical Engineer - Air Traffic Solutions (Onsite) RTXPrincipal Mechanical Engineer - Air Traffic Solutions (Onsite)MassachusettsTypically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and minimum 8 years prior relevant experience or an Advanced Degree in a related field and minimum 5 years of experience. As part of our commitment to maintaining a secure hiring process, candidates may be asked to attend select steps of the interview process in-person at one of our office locations, regardless of whether the role is designated as on-site, hybrid or remote.
Principal Embedded Software Engineer RTXPrincipal Embedded Software EngineerMassachusettsAbility to obtain INTERIM U.S. government issued security clearance is required prior to start date At RTX, the world's largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world’s most complex problems. RTX considers several factors when extending an offer, including but not limited to, the role, function and associated responsibilities, a candidate’s work experience, location, education/training, and key skills.
C5I Principal Platform Engineer RTXC5I Principal Platform EngineerConcord, MassachusettsActive and existing security clearance required after day 1 At RTX, the world's largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world’s most complex problems. This role requires deep DevSecOps expertise, technical leadership and the ability to influence architecture and engineering strategy across multiple teams.
Principal Engineer – Solid Propulsion RTXPrincipal Engineer – Solid PropulsionTewksbury, MassachusettsAbility to obtain INTERIM U.S. government issued security clearance is required prior to start date At RTX, the world's largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world’s most complex problems. Apply or develop highly advanced technologies, scientific principles, theories and concepts to the systems integration of propulsion, thrusters, controllers, software, mechanical and electrical interfaces for integration into missile systems and space vehicles.
Sr Principal SW Development Engineer UKGSr Principal SW Development EngineerBoston, MA$163,900–$235,550 / yearOperating at a principal level, this role goes well beyond traditional requirements gathering—serving as a trusted advisor, systems strategist, and transformation leader across large, multi-phase programs involving D365 Finance & Operations, and integrated enterprise platforms. This role partners closely with Finance and Go To Market teams and IT leadership to translate complex business objectives into scalable, compliant, and future-ready system solutions.
Principal Engineer, VP State StreetPrincipal Engineer, VPMassachusettsDrive technical excellence by working independently to analyze, design, develop, test, and debug large and complex software enhancements and solutions within Charles River’s business and technical problem domains including modifications to core frameworks and other primary facilities critical to system operation. Develop, test, debug, and implement software programs, applications and projects using Java, C#, SQL, JavaScript, or other related software engineering languages as well as keeping abreast of emerging technologies impactful to CRD’s business.
Principal System Administrator (ONSITE) RTXPrincipal System Administrator (ONSITE)MassachusettsServe as a Principal Systems Administrator supporting Windows and Linux enterprise environments, responsible for the design, implementation, maintenance, patching, and troubleshooting of Windows Server, Windows 11, RHEL 7/8/9, and virtualized infrastructure within a large-scale, mission-critical environment operating 24x7x365. Experience with Windows and Linux patching, vulnerability remediation, and compliance activities, including STIG/EVAL STIG implementation, SCAP/ACAS support, log collection, and close coordination with Cyber Security teams to maintain continuous compliance with DoD and regulatory requirements.
NewSLCM-N - Sr Principal Systems Engineer General Dynamics Mission Systems, IncSLCM-N - Sr Principal Systems EngineerPittsfield, MA$174,648–$193,751 / yearGeneral Dynamics Mission Systems (GDMS) engineers a diverse portfolio of high technology solutions, products and services that enable customers to successfully execute missions across all domains of operation. We encourage you to apply if you have any of these preferred skills or experiences: Deep Systems Engineering Knowledge, strong Communication Skills to senior leaders, deep understanding of Navy Strategic Systems Programs (SSP).
Principal Actuation Systems Electrical Lead RTXPrincipal Actuation Systems Electrical LeadTewksbury, MassachusettsYou will be expected to apply sound systems engineering principles to define and solve sometimes complex actuation system problems while influencing engineering teams to include electrical engineering, mechanical engineering, control systems engineering, software and firmware engineering, manufacturing engineering, supply chain and others. The RAP department is responsible for design, product and production support engineering in the following areas: Power System Design - Power System Noise, System Simulation and Modeling, Solid State Transmitters, Tube Transmitters, High Voltage Design, Power Sources, Generators.
2026 ADGE Sr Principal Mech Engineer - On Site RTX2026 ADGE Sr Principal Mech Engineer - On SiteTewksbury, MassachusettsActive and existing security clearance required after day 1 At RTX, the world's largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world’s most complex problems. Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 10 years of prior relevant experience or an Advanced Degree in a related field and minimum 7 years’ experience.
Principal Analyst, Operations And Health Systems Research Biogen IdecPrincipal Analyst, Operations And Health Systems ResearchCambridge, MA$141,000–$188,000 / yearLeverage methods from operations research such as constraints-based optimization, linear and non-linear programing, simulation and network modeling to understand participant, investigator, and sponsor behaviors that drive risk, benefit, and uncertainty in clinical trial outcomes. Regular employees are eligible to receive both short term and long-term incentives, including cash bonus and equity incentive opportunities, designed to reward recent achievements and recognize your future potential based on individual, business unit and company performance.
Principal System Engineer LIMS ModernaTXPrincipal System Engineer LIMSNorwood, MassachusettsRemoteWe are proud to have been recognized as a Science Magazine Top Biopharma Employer, a Fast Company Best Workplace for Innovators, and a Great Place to Work in the U.S. If you want to make a difference and join a team that is changing the future of medicine, we invite you to visit modernatx.com/careers to learn more about our current opportunities. The Candidae will report to and work closely with the Director, Digital LIMS Systems to ensure the implementation of new solutions and improvement of existing systems (LabVantage) for the Moderna Digital Laboratory Systems organization.
Principal Mechanical Engineer - Mechanism Design RTXPrincipal Mechanical Engineer - Mechanism DesignTewksbury, MassachusettsExperience with any of the following: Development of different actuation drive systems, examples include power management, motor and/or gear train sizing and implementation (spur gear, ball screw, lead screw, etc.) or associated bearing configurations for optimization of friction and position accuracy, and/or load capacity or electromechanical control actuation systems or design experience mechanism synthesis and analysis. In this position, you will be responsible for developing technical solutions for a wide range of mechanism and machine design challenges, such as mechanical design of motion control actuation systems & subsystems, including custom actuator and geartrain design, kinematic and dynamic analysis of mechanisms, design of machine elements, bearing design, selection and analysis.