205 principal software engineer jobs at 82 companies in Epping, NH
2mo
Save
Mark Applied
Hide
Principal Software Engineer
Atlanta or Boston or Morristown or Plano or St. Louis or St. Petersburg or Hyderabad
HybridFull Time
8+ YOE8+ years backend software engineering; degree or equivalent; cloud, IaC, CI/CD; APIs; strong communication; leadership.
TypeScript, Node.js, PostgreSQL, Angular, AWS, Terraform, Elasticsearch, CI/CD, SASS
2mo
Save
Mark Applied
Hide
Principal Software Engineer
Bethesda or Waltham
$164k-$257k/yr HybridFull Time
8+ YOE8+ years software engineering; production-grade APIs; GraphQL; Node.js; TypeScript; Go; OAuth2/JWT; security; scalable SaaS APIs.
GraphQL, Node.js, TypeScript, Go, Jenkins, ArgoCD, Datadog, OAuth 2.0, JWT
2mo
Save
Mark Applied
Hide
Principal Software Engineer
Waltham or North Bethesda
$200k-$225k/yr HybridFull Time
8+ YOE8–12+ years of software development; expert in Python, React/TypeScript, AWS; strong system architecture and enterprise integration experience; Bachelor's degree in CS/Engineering or related field.
Python, React, TypeScript, AWS
4d
Save
Mark Applied
Hide
Principal Software Engineer
Boston, Massachusetts, United States
$144k-$170k/yr OnsiteFull Time
10+ YOE5+ MgmtBachelor's degree and 10+ years of software engineering experience required, including 5+ years of technical leadership. Requires proficiency in two TIOBE top-20 languages and complex systems architecture experience.
Elixir, AWS, Terraform, OpenTofu, Infrastructure as Code, GTFS, GTFS-RT, TODS, TIDES
1mo
Save
Mark Applied
Hide
Principal Software Engineer
Merrimack, New Hampshire, United States
$118k-$201k/yr OnsiteFull Time
10+ YOEActive Secret clearance, Bachelor's in CS/CE + 10+ years (or equivalent) experience, embedded C/C++ development on Linux, Python scripting, Agile/DevSecOps and CI/CD, software testing/verification, and strong communication and team leadership skills.
C++, C, Python, Linux, Jira, Confluence, Bitbucket, Git, CI/CD
3mo
Save
Mark Applied
Hide
Principal Software Engineer (Cloud)
Boston, Massachusetts, United States
HybridFull Time
15+ YOE15+ years software engineering; cloud-native distributed systems; leadership; backend languages (Rust, Python, TypeScript, Go); cloud platforms (AWS, GCP, Azure); strong communication; AI-assisted tooling familiarity.
Rust, Python, TypeScript, Go, AWS, GCP, Azure, Claude Code, Codex, Cursor
2mo
Save
Mark Applied
Hide
Principal Software Engineer - AI
Boston, Massachusetts, United States
$120k-$180k/yr OnsiteFull Time
New Balance: Designs and manufactures athletic footwear, apparel, and sports equipment.
10+ YOE10+ years software development with 4+ years AI/ML and LLMs; extensive Python, agentic frameworks, and Microsoft AI ecosystem experience.
Python, LangChain, LangGraph, Semantic Kernel, Azure OpenAI Service, Azure AI Search, Microsoft Copilot Studio, React, RESTful APIs, ERPs, CRMs, SQL, NoSQL
2mo
Save
Mark Applied
Hide
Principal Software Engineer, Data
Cambridge or San Francisco
$204k-$348k/yr HybridFull Time
8+ YOE8-15 years of backend-focused engineering; full stack experience; AWS, Kubernetes; API design; data pipelines; Python; collaboration with scientists and engineers.
React, TypeScript, Nx, Tailwind, FastAPI, SQL/NoSQL, Python, Pydantic, SQLAlchemy, SQLModel, Django, Airflow, Prefect, Temporal, Dagster, pandas, numpy, scipy, jax, pytorch, AWS, Kubernetes, Terraform, CloudFormation, GitHub Actions
2mo
Save
Mark Applied
Hide
Principal Software Engineer
Cambridge, Massachusetts, United States
$300k-$500k/yr OnsiteFull Time
Hands-on, production-focused senior IC with full-stack expertise across backend, frontend, infra, and AI systems; strong Python, cloud, databases, and LLM tooling; ownership of critical systems.
Python, Node.js, REST, gRPC, AWS, GCP, Azure, Kubernetes, Terraform, PostgreSQL, MySQL, MongoDB, Cassandra, DynamoDB, Neo4j, Vector databases, LangSmith, OpenAI, Anthropic, Frontend
2mo
Save
Mark Applied
Hide
Principal Software Engineer
Tewksbury, Massachusetts, United States
$108k-$205k/yr OnsiteFull Time
8+ YOEU.S. citizenship and ability to obtain Interim Secret clearance; typically a STEM bachelor’s with 8+ years (or advanced degree with 5+ years); strong C/C++ (or Java) and Unix/Linux experience; embedded/real-time systems, multithreading, and performance optimization skills.
C/C++, Java, Unix/Linux, tcsh, csh, bash, Git, ClearCase, VxWorks, Integrity, Agile, Scrum
3mo
Save
Mark Applied
Hide
Principal Software Engineer
Westlake or Merrimack
HybridFull Time
4+ YOEBachelor’s degree preferred; 4+ years software engineering; strong Python/Java, AWS, CI/CD, Spring Boot, SQL; experience with automation, AI-assisted code, and mentoring.
Python, Java, Spring Boot, AWS, EKS, Docker, REST, Maven, JSON, Tomcat, Swagger, Message Queues, Concourse, Git, Jenkins, Artifactory, Veracode, uDeploy, Selenium, Cucumber, FitNesse, Oracle, SQL
2mo
Save
Mark Applied
Hide
Principal Software Developer - SafeTrace
Boston, Massachusetts, United States
$104k-$176k/yr OnsiteFull Time
10+ YOE10+ years software engineering with 5+ years in principal/architect roles; expert C# or Java/Python; experience with REST APIs, microservices, event-driven systems, CI/CD, containerization, SQL/NoSQL, AWS and Terraform; security and compliance (OWASP, OIDC, SAML2, SOC2, ISO27001, HIPAA).
C#, Java, Python, RESTful APIs, Microservices, Domain-driven design, CI/CD, Event-driven architecture, Service-oriented architecture, High-availability, Containerization, SQL, NoSQL, Epic, AWS, ECS, EKS, RDS, Lambda, S3, SQS, CloudFormation, Terraform, OWASP, OIDC, SAML2, SOC2, ISO27001, HIPAA
2mo
Save
Mark Applied
Hide
Principal Reliability Engineer – Software Quality
Boston, Massachusetts, United States
$141k-$198k/yr HybridFull Time
7+ YOEBachelor’s or Master’s in IT/CS/Software Eng with 5–7+ years in software engineering; strong knowledge of SDLC, regulatory standards, and software quality methods.
C, C++, C#, Python, SQL, Minitab
2mo
Save
Mark Applied
Hide
Principal Software Engineer - Python
Boston, Massachusetts, United States
$150k-$300k/yr RemoteFull Time
12+ YOE12+ years of production Python development; enterprise SaaS; open-source tools; FastAPI; Pydantic; strong English communication; unrestricted right to work in the United States.
Python, Git, FastAPI, Pydantic
4w
Save
Mark Applied
Hide
Principal Software Engineer
Burlington, Massachusetts, United States
$178k-$230k/yr HybridFull Time
10+ YOE2+ MgmtBachelor's in CS/CE or equivalent, 10 years professional software engineering experience with strong Java, object-oriented design, database and automation skills; 2 years technical leadership; experience with cloud projects and CI/CD tools.
Java, C#, React, SQL, SQL Server, PowerShell, Jenkins, GIT, JavaScript, SOAP, REST, XML, JSON, Azure
1mo
Save
Mark Applied
Hide
Principal Software Engineer
Boston, Massachusetts, United States
$193k-$319k/yr HybridFull Time
12+ YOEBachelor's in Software Engineering or related and 12 years' experience; 10+ years with Linux networking, Kubernetes CNI, and Go/Python; 8+ years with OpenShift and image-based installers; 5+ years OVN; 2+ years DPU/SmartNIC experience.
Open Virtual Network (OVN), OpenShift, Cluster Network Operator (CNO), Doca Platform Framework (DPF), Data Processing Unit (DPU), BlueField Boot (BFB), HyperShift, Red Hat Enterprise Linux CoreOS (RHCOS), Assisted Installer, Single Node OpenShift (SNO), Go, Python, Kubernetes, CNI, Linux
2mo
Save
Mark Applied
Hide
Principal Reliability Engineer – Software Quality
Boston, Massachusetts, United States
$141k-$198k/yr HybridFull Time
5+ YOEBachelor's in IT/CS/Software Engineering; 5-7+ yrs software quality; SDLC, FDA/ISO; C/C++, C#, Python, SQL; Minitab; SFMEA/SFTA; software validation and V&V.
C, C++, C#, Python, SQL, Minitab
2w
Save
Mark Applied
Hide
Principal Software Engineer
Wilmington, Massachusetts, United States
$144k-$216k/yr OnsiteFull Time
8+ YOE3+ MgmtBachelor's degree or equivalent,8+ years quality engineering experience,3+ years technical leadership,proficiency in test automation,CI/CD,API testing,Agile.
Java, Python, C#, JavaScript, Selenium, Cypress, Playwright, Appium, RestAssured, MS Copilot, Jenkins, GitHub Actions, Azure DevOps, JMeter, Gatling, k6, Docker, Kubernetes, AWS, Azure
1mo
Save
Mark Applied
Hide
Principal Software Engineer - US
Boston, Massachusetts, United States
RemoteFull Time
10+ YOE10+ years software engineering experience; strong Go skills; familiarity with .NET and TypeScript; event-driven microservices with Apache Kafka; AWS experience; CI/CD and automated testing; strong communication and technical leadership.
Go, .NET, TypeScript, Apache Kafka, AWS
2mo
Save
Mark Applied
Hide
Principal Software Engineer
United States or Redmond or Mountain View or Chicago or Austin or Houston or New York or Cambridge or Atlanta
$143k-$275k/yr OnsiteFull Time
6+ YOEBachelor's in Computer Science or related + 6+ years engineering experience (C, C++, C#, Java, JavaScript, Python) required; Master's or higher experience preferred; must have existing work authorization (no visa sponsorship).
C, C++, C#, Java, JavaScript, Python
Explore Jobs