Principal Software Engineer, AI Observability & Evals Platform LangChainPrincipal Software Engineer, AI Observability & Evals PlatformCambridge, Massachusetts$230,000–$270,000 / yearToday, our platform includes LangSmith (Observability, Evaluation, Deployment, Fleet, and Sandboxes), our open source frameworks (LangChain, LangGraph, and Deep Agents), and the newly launched LangSmith Engine for autonomous agent improvement. With $125M raised at Series B from IVP, Sequoia, Benchmark, CapitalG, and Sapphire Ventures, we’re at a stage where we’re continuing to develop new products, growth is accelerating, and all team members have meaningful impact on what we build and how we work together.
Principal Electrical Engineer ReBuild ManufacturingPrincipal Electrical EngineerWilmington, MA$165,000–$250,000 / yearAn experienced engineering leader with a broad range of electrical engineering disciplines, including analog and digital circuit design, power electronics, PCB design, sensors, instrumentation, embedded electronics, and electromechanical systems. You'll also work directly with clients to understand their challenges, participate in technical reviews and demonstrations, and partner with suppliers and manufacturing teams to successfully transition designs into production.
Principal Software Engineer (Cloud) Seven AIPrincipal Software Engineer (Cloud)Boston, MassachusettsYou will operate across the stack driving designs, shaping engineering strategy, leading complex technical initiatives from concept to production, and mentoring engineers across the organization. Strong system design expertise, including distributed systems, APIs, event-driven architectures, data-intensive applications, and infrastructure scalability.
Principal Software Engineer, Backend Centum SearchPrincipal Software Engineer, BackendBoston, MassachusettsAs a senior technical leader, you will help define architecture, establish engineering best practices, and mentor engineers while remaining deeply hands-on in the codebase. Centum Search is representing a healthcare startup focused on building technology that improves how care is delivered, accessed, and managed.
NewSr. Principal Software Engineer - Cardiac Ablation Solutions MedtronicSr. Principal Software Engineer - Cardiac Ablation SolutionsNewton, MassachusettsIf you are applying to perform work for Medtronic, Inc. (“Medtronic”) in any position which will involve performing at least two (2) hours of work on average each week within the unincorporated areas of Los Angeles County, you can find here a list of all material job duties of the specific job position which Medtronic reasonably believes that criminal history may have a direct, adverse and negative relationship potentially resulting in the withdrawal of a conditional offer of employment. The following benefits and additional compensation are available to those regular employees who work 20+ hours per week: Health, Dental and vision insurance, Health Savings Account, Healthcare Flexible Spending Account, Life insurance, Long-term disability leave, Dependent daycare spending account, Tuition assistance/reimbursement, and Simple Steps (global well-being program).
Principal Software Engineer - Core Infrastructure (Python/C++) MedtronicPrincipal Software Engineer - Core Infrastructure (Python/C++)Newton, MassachusettsIf you are applying to perform work for Medtronic, Inc. (“Medtronic”) in any position which will involve performing at least two (2) hours of work on average each week within the unincorporated areas of Los Angeles County, you can find here a list of all material job duties of the specific job position which Medtronic reasonably believes that criminal history may have a direct, adverse and negative relationship potentially resulting in the withdrawal of a conditional offer of employment. The following benefits and additional compensation are available to those regular employees who work 20+ hours per week: Health, Dental and vision insurance, Health Savings Account, Healthcare Flexible Spending Account, Life insurance, Long-term disability leave, Dependent daycare spending account, Tuition assistance/reimbursement, and Simple Steps (global well-being program).
Principal Software Engineer DigitalOceanPrincipal Software EngineerBoston, MARemote$235,200–$294,000 / yearIAM and KMS are the bedrock of trust at DigitalOcean; our services sit in the critical path of every request, authorizing billions of transactions per second with single-digit millisecond latency, and securing the cryptographic material that protects every customer workload on the platform. Evolve Key Management: Design and deliver a robust, multi-tenant KMS, including envelope encryption, customer-managed key patterns, and HSM-backed key material, that gives customers deep, fine-grained control over their data security posture.
Principal Mixed-Signal Design Engineer Analog DevicesPrincipal Mixed-Signal Design EngineerWilmington, MassachusettsAnalog Devices, Inc. (NASDAQ: ADI) is a global semiconductor leader that bridges the physical and digital worlds to enable breakthroughs at the Intelligent Edge – the point where the physical and digital worlds interact, where data is generated, and real-time insights are derived. ACG has an excellent track record of producing breakthrough, innovative technologies including RF DACs and ADCs, and SerDes PHYs, in cutting-edge FinFET process technologies for integration into highly sophisticated system-on-chip (SoC) products.
NewPrincipal 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 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 Optical Engineer QuEra Computing Inc.Principal Optical EngineerBoston, MA$151,200–$236,250 / yearThe Hardware Engineering Group at QuEra Computing is seeking strong candidates for a Principal Optical Engineer to serve as a senior individual contributor to the company's mission of building state-of-the-art, manufacturable, and deployable neutral atom quantum computers. Work with physicists to understand requirements and architect optical systems, sub-systems, modules, and components to support QuEra's neutral atom computers through the full development lifecycle (R&D, productization, maintenance, and beyond).
Principal Software Engineer Roberts RecruitingPrincipal Software EngineerWaltham, MassachusettsIf you're a thought leader with a proven track record in system architecture, have a deep understanding of financial systems, and get excited by building cutting-edge solutions, youmight be the game-changer we're looking for! Exceptional leadership skills, with experience managing and mentoring engineering teams to successfully deliver on product roadmaps.
Principal Devops Engineer PTC, Inc.Principal Devops EngineerBoston, MA$118,000–$190,000 / yearOur platform brings the best of modern SaaS collaboration to 3D CAD - think SolidWorks meets GitHub meets Google Docs - and is used globally by teams building the next generation of products. Today, we are a global team of nearly 7,000 and our main objective is to create opportunities for our team members to explore, learn, and grow - all while seeing their ideas come to life and celebrating the differences that make us who we are and the work we do possible.
Principal Software Engineer XometryPrincipal Software EngineerWaltham, MA$200,000–$225,000 / yearYou Would Be A Great Fit With: CAD/PLM Domain Expertise: Broad experience working within enterprise engineering software ecosystems (e.g., Dassault/SolidWorks, Autodesk, or similar major platforms). Xometry’s digital marketplace gives manufacturers the critical resources they need to grow their business while also making it easy for buyers at Fortune 1000 companies to tap into global manufacturing capacity.
Principal Implementation Engineer PowerFactorsPrincipal Implementation EngineerBoston, MASpecifically, we are looking for someone with: 8+ years of experience working inside the renewable energy industry, in asset management, performance engineering, O&M, or a comparable technical role at an IPP, asset owner, OEM analytics team, or renewable monitoring organization including several years of PV experience. Our platform ingests millions of IoT and other data points, cleanses the data, detects performance issues, identifies leading indicators of future problems, and delivers advanced analytics to help customers maximize asset performance.
NewPrincipal Data Links and Communications Engineer - Active Top-Secret Clearance Macpower Digital Assets Edge Private LimitedPrincipal Data Links and Communications Engineer - Active Top-Secret ClearanceBedford, MA$135,000–$150,000 / yearThis includes interface with Air Combat Command, Air Force Command and Control Integration Center, Joint Interoperability Test Command, Space and Naval Warfare Systems Command, and all levels of the organizations that develop and manage the C3 and encryption key distribution infrastructure for controlling a networked system, providing technical advice on C4 issues, including pre-launch conditioning and planning, aircraft-weapon pre- and post-release communications, and real-time targeting. This includes interfacing with the Federal Department of Defense (DoD), United States Air Force (USAF), United States Army, and Joint communities to ensure the data link communications capability complies with the applicable Federal Aviation Administration, Defense Information Systems Agency (DISA), National Security Agency (NSA), Service Acquisition Executive, Joint Mission Planning System (JMPS), Damage Assessment and Casualty Report business and technical rules.
Principal Full Stack AI Engineer ValidityPrincipal Full Stack AI EngineerBoston, MAValidity is a truly unique company - massive revenue growth, top-tier investors, 5-star product ratings, proven ability to acquire and integrate top tech companies and welcome them into the Validity family, a winning culture, and a work environment that fosters hard work, trust, and fun. For over 20 years, tens of thousands of organizations across the world have relied on Validity solutions to target, contact, engage, and retain customers - using trustworthy data as a key advantage.
Principal Software Engineer, Berxi Vets HiredPrincipal Software Engineer, BerxiBoston, MassachusettsWe are seeking a highly skilled Principal Software Engineer to lead the design and delivery of scalable, cloud-native digital platform solutions in a direct-to-customer environment. This role plays a key part in shaping technical strategy, mentoring engineering teams, and building secure, high-performance applications that drive business growth.
Principal Software Engineer - 3D Visualization (OpenGL) Medtronic PlcPrincipal Software Engineer - 3D Visualization (OpenGL)Newton, MAYou'll lead architecture for the rendering pipeline (OpenGL, VTK, Qt/QML integration, GPU resource management, real-time performance), shape the long-term direction for how visualization scales to new clinical modalities and new hardware, and partner closely with UI/UX leaders, signals and algorithms leaders, and product to define what's possible. If you are applying to perform work for Medtronic, Inc. ("Medtronic") in any position which will involve performing at least two (2) hours of work on average each week within the unincorporated areas of Los Angeles County, you can find here a list of all material job duties of the specific job position which Medtronic reasonably believes that criminal history may have a direct, adverse and negative relationship potentially resulting in the withdrawal of a conditional offer of employment.
Principal Software Engineer BlitzyPrincipal Software EngineerCambridge, MassachusettsWe are hiring a Principal Engineer to take full, hands-on ownership of Blitzy's most critical production-grade systems and to deliver high-leverage features that materially improve customer outcomes and engineering velocity. We're transforming how enterprises build software, turning enterprise requirements into production-ready code with an agentic software development platform that can autonomously execute 80% of the quantum of software development work.