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 Radar Systems Engineer GCR Professional ServicesPrincipal Radar Systems EngineerWoburn, MassachusettsContractorClient is focused on delivering National Defense capabilities by driving mission-focused strategies to develop advanced technology systems enabling enduring products and solutions focused on achieving the customer vision. Applicants are expected to be self-motivated, detail oriented and have a demonstrated ability to effectively communicate with all levels of management and individual contributors on the program team through strong written and verbal communication skills.
Principal Digital Signal Processing Systems Engineer GCR Professional ServicesPrincipal Digital Signal Processing Systems EngineerCambridge, MassachusettsContractorAs Principal Signal Processing System Engineer you will work directly with customers and program managers to create innovative, multidisciplinary technical solutions, for a broad range of highly-complicated mission needs. You will have hands-on engagement with prototype development, which may include software or firmware coding, test equipment operation and programming, integration and validation, and field tests and customer demonstrations.
Senior Software Engineer GCR Professional ServicesSenior Software EngineerWoburn, MassachusettsContractorHave domain expertise in one or more of the following areas: electronic warfare, antenna apertures, sensor resource management, large-scale platform test systems, cyber physical systems, open system architectures. Systems Development Division (SDD) executes the entire lifecycle of the solution, from conceptualization and architecture refinement through implementation and deployment, while leveraging novel technologies to deliver first-of-a-kind systems.
NewPrincipal Data Engineer Waters CorporationPrincipal Data EngineerMilford, MAStrong business domain knowledge and experience working with enterprise systems such as SAP (e.g., supply chain data, orders, revenue recognition, pricing), Salesforce (commercial or service processes), with the ability to translate business processes into scalable data solutions. The Principal Data Engineer designs, builds, and enhances robust data pipelines and platforms that support analytics, machine learning, and operational monitoring.
Principal Front-Office Engineer AxelonPrincipal Front-Office EngineerBoston, MAAs a Principal Front-Office Engineer, you will serve as the technical lead embedded within the Risk team, driving design and implementation of small-scale applications and proof of concepts that will improve risk analysis, develop AI-enabled workflows, and enhance reporting systems & processes. Strong SQL skills required with a familiarity of financial data platforms (such as Bloomberg, FactSet, Aladdin, eFront, Moodys), financial databases, and data manipulation techniques preferred.
NewPrincipal Electrical Engineer Gentex CorporationPrincipal Electrical EngineerManchester, NHYou'll work at the intersection of high-bandwidth, low-latency video distribution for enhanced night vision devices and next-generation smart battery pack design — shaping the electrical backbone of our helmet-mounted platforms to ensure efficient power delivery, robust data pathways, and seamless integration across mission-critical technologies. Located in the heart of New England, Manchester is also conveniently located within an hour’s drive of Boston, an hour from the Atlantic Ocean and less than two hours from New Hampshire’s scenic White Mountains, Lake Winnipesaukee and the many other well-known vacation destinations in Maine, Vermont and Massachusetts.
NewSoftware Engineer The Computer Merchant, LtdSoftware EngineerTewksbury, MA$98–$102 / hourContractorWhile an hourly range is posted for this position, an eventual hourly rate is determined by a comprehensive salary analysis which considers multiple factors including but not limited to: job-related knowledge, skills and qualifications, education and experience as compared to others in the organization doing substantially similar work, if applicable, and market and business considerations. Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 5 years of prior relevant experience unless prohibited by local laws/regulations.
Senior Lead AI Software Engineer KlaviyoSenior Lead AI Software EngineerBoston, MA$216,000–$324,000 / yearAs a Senior Lead Software Engineer on Amplify, you will: Independently own and drive high-impact objectives that span multiple Amplify teams and align with company priorities, defining the technical roadmap that ensures our internal applications, APIs, data and event pipelines, and AI-powered workflows can scale with Klaviyo and continue delivering measurable business outcomes. Independently lead the end-to-end lifecycle of large, multi-team initiatives with clear technical direction, architectural leadership, and active workstream curation, from discovery and design through implementation, rollout, and long-term ownership of complex programs that span internal customers across the company.
Test Engineer - Aerospace - Boston, MA Michael Page USATest Engineer - Aerospace - Boston, MASomerville, MA$130,000–$195,000 / yearFull timeOur client is an innovative organization operating at the forefront of the space technology sector, developing highly advanced systems designed for demanding environments. You will lead hands-on testing efforts, ensuring systems perform reliably in extreme environments while supporting the delivery of high-impact space technologies.
Senior Principal Software Engineer Rocket SoftwareSenior Principal Software EngineerBoston, MARemote$124,500–$168,075 / yearYou will collaborate with customers, engineering teams, sales, and product management teams to ensure our offerings deliver robust protection, highly reliable, performant, operationally simple, and highly secure. Key modernization initiatives will include: + Embedding generative and predictive AI to enhance predictable operational outcomes, build workflow processes, and effectively integrate automation into enterprises.
Sr Principal/Principal Software Engineer, App Lila Sciences IncSr Principal/Principal Software Engineer, AppCambridge, MA$204,000–$348,000 / yearFull-time U.S. employees receive a comprehensive benefits program including medical, dental, and vision coverage; employer-paid life and disability insurance; flexible time off with generous company wide holidays; paid parental leave; an educational assistance program; commuter benefits, including bike share memberships for office based employees; and a company subsidized lunch program. Communication & Collaboration: Acute listening skills, and a proven track record of working cross-functionally with scientists, data engineers, and product teams; able to explain complex ideas to diverse audiences.
NewPrincipal Software Engineer - Python Veeva SystemsPrincipal Software Engineer - PythonBoston, MARemote$150,000–$300,000 / yearUnlike a traditional corporation, whose only legal duty is to maximize shareholder value, PBCs consider their public benefit purpose and the interests of those materially affected by the corporation's conduct-including customers, employees, and the community-in addition to shareholders' interests. The team will be AI-first in two meaningful ways: using AI to drive engineering productivity and strong engineering discipline, and building a product that applies AI in genuinely innovative ways to problems that matter.
Principal / Senior Software Engineer Flagship Pioneering IncPrincipal / Senior Software EngineerCambridge, MA$108,000–$209,000 / yearFlagship has been recognized twice on FORTUNE's "Change the World" list, an annual ranking of companies that have made a positive social and environmental impact through activities that are part of their core business strategies, and has been twice named to Fast Company's annual list of the World's Most Innovative Companies. Many of the companies Flagship has founded have addressed humanity's most urgent challenges: vaccinating billions of people against COVID-19, curing intractable diseases, improving human health, preempting illness, and feeding the world by improving the resiliency and sustainability of agriculture.
Principal Software Engineer IconstaffPrincipal Software EngineerBoston, MassachusettsWe’re seeking a Senior Software Engineer to design and build scalable systems that support real-world mental health care delivery. Our engineering team builds technology that drives clinical excellence and operational efficiency.
Principal Software Engineer Xometry IncPrincipal Software EngineerWaltham, MA$200,000–$225,000 / yearXometry'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. Operational Excellence: You will own the reliability and security of the integration microservices, ensuring that "click-to-buy" functionality is bulletproof and that monitoring/alerting covers the unique lifecycle of enterprise PLM transactions.
Principal Software Engineer, Platform Engineering ModernaTXPrincipal Software Engineer, Platform EngineeringCambridge, MassachusettsThis is a senior individual contributor role that combines deep technical execution with cross-functional technical leadership across developers ("Builders"), Cybersecurity, Architecture, AI platform teams, and broader teams to provide scalable, secure, and user-focused capabilities that make the right path the easiest path for Moderna’s engineering teams. We 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.
Senior Principal Software Engineer/Architect UKG IncSenior Principal Software Engineer/ArchitectLowell, MA$207,400–$298,100 / yearM&A technical leadership: Lead technical diligence for acquisitions affecting Ready: evaluate architecture fit, identify integration risks (data, security, compliance), design migration/integration plans, and lead or advise post-close execution to minimize customer and delivery risk. Hands-on technical leadership: Own high-risk or high-impact technical work (POCs, performance optimizations, complex integrations), mentor architects and senior engineers, and lead architecture reviews and decision records.
NewPrincipal Software Engineer - Contract AI McKinsey & Co IncPrincipal Software Engineer - Contract AIBoston, MAYou will own extraction and evaluation architecture, design and evolve the multi-stage AI pipeline that converts unstructured contracts and invoices into structured compliance findings -covering document ingestion, vision LLM extraction, clause parsing, normalization, and deterministic evaluation logic. Youll stay at the frontier: continuously evaluate emerging agentic frameworks, multi-modal models, and document-understanding approaches; propose and prototype high-value capabilities before they appear in competitors roadmaps.
Principal Software Engineer CVS Health CorpPrincipal Software EngineerMA$144,200–$288,400 / yearOperating as both a senior individual contributor and technical leader, you will partner closely with product, architecture, and engineering leadership to make pragmatic, high‑impact design decisions that balance speed, quality, and long‑term maintainability. Partner with teams and serve as subject matter expert to provide benchmarked solutions to multiple, complex technical projects/initiatives within own area of expertise and organize cross-departmental application architectural solutions.