93 sr net developer jobs at 63 companies in Nashua, NH
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.NET developer
Boston, Massachusetts, United States
$115k-$140k/yr OnsiteFull Time
5+ YOEBachelor's degree or equivalent experience and 5+ years developing .NET applications. Requires C#, databases, REST APIs, web technologies, version control, Agile, collaboration, and mentoring skills.
.NET, C#, MySQL, PostgreSQL, SQL Server, HTML, CSS, JavaScript, Subversion, Git, React, Node.js, Piano ID
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Senior .NET developer
Boston, Massachusetts, United States
$115k-$140k/yr OnsiteFull Time
5+ YOE5+ years building .NET/C# applications, SQL database experience, REST API development, web frontend skills, version control (Subversion/Git), agile experience, strong communication and mentoring ability.
.NET, C#, MySQL, Postgres, SQL Server, HTML, CSS, JavaScript, Subversion, Git, React, Node.js, Piano ID
3w
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.NET Full Stack Engineer
Beverly, Massachusetts, United States
$103k-$173k/yr OnsiteFull Time
Strong C#/.NET, Angular, SQL, and Microsoft Azure experience; able to deliver in rapid weekly sprints; familiarity with AI-assisted coding tools (Cursor) preferred.
.NET, C#, Angular, ReactJS, TypeScript, Microsoft Azure, PostgreSQL, Microsoft SQL Server, SQL, Amazon Web Services, Cursor, Model Context Protocol (MCP)
2w
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Sr. Optimizely Developer
Massachusetts or Denver or Boston or Worcester
HybridFull Time
5+ YOERequires 5+ years of full-stack web development, including 3+ years with Optimizely; expertise in C#, .NET, HTML, CSS, JavaScript, Git, and CI/CD pipelines.
Optimizely CMS, Episerver, Core Web Vitals, Salesforce, Marketo, Adobe Commerce, Optimizely Web Experimentation, GitHub Copilot, ChatGPT, Optimizely Feature Experimentation, Figma, C#, .NET Core, MVC, HTML5, CSS3, SASS, JavaScript, ES6+, jQuery, React, Vue, Project JS, Git, Azure DevOps, GitHub Actions
2w
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Sr. Optimizely Developer
Boston or Denver
HybridFull Time
5+ YOE5+ years full-stack web development with 3+ years in Optimizely; deep C#/.NET Core/MVC backend and advanced HTML5/CSS3/JS frontend skills; experience with experimentation, personalization, and CI/CD.
Optimizely CMS, Optimizely Web Experimentation, Optimizely Feature Experimentation, C#, .NET Core, MVC, HTML5, CSS3, SASS, JavaScript, ES6+, jQuery, React, Vue, Project JS, Figma, Git, Azure DevOps, GitHub Actions, GitHub Copilot, ChatGPT, Salesforce, Marketo, Adobe Commerce
1mo
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Senior EDI Developer
Somerville, Massachusetts, United States
$94k-$137k/yr HybridFull Time
Mass General Brigham: Provides integrated medical care, research, and clinical training services.
5+ YOEDesign, develop, implement, and maintain HIPAA EDI solutions (ANSI X12, HL7, XML) with strong C#/.NET and SQL Server experience; 5+ years application development experience preferred.
C#, .NET, SQL Server Management Studio (SSMS), SSIS, T-SQL, Microsoft SQL Server, Visual Studio, BizTalk Server, QNXT, ASP.NET, XML, XSLT, HL7, ANSI X12
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Staff Software Engineer
Needham, Massachusetts, United States
$142k-$188k/yr HybridFull Time
10+ YOEBachelor's degree in computer science, computer engineering, related field, or equivalent experience; 10+ years of software development; mentoring or leadership; C#/.NET, databases, networking, and device development experience.
C#, .NET, SQL Server, Kafka, Ember.js, iOS, Android, HVAC, Health Savings Account (HSA), Nasdaq
2w
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Staff Software Engineer - Algorithms
Wilmington, Massachusetts, United States
$149k-$205k/yr HybridFull Time
8+ YOEBachelor's or Master's in CS or related, 8+ years professional C#/.NET development, strong algorithms and distributed systems experience, debugging and SQL skills, Windows/Linux development.
C#, .NET, .Net Core, Rabbit MQ, Open API, Kubernetes, Git, SQL Server, PL/SQL, Windows, Linux
2w
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Backend Software Engineer (Agents Channel)
Waltham, Massachusetts, United States
$163k-$220k/yr HybridFull Time
6+ YOE6+ years backend development experience (Java/Kotlin or Python/.NET), BSc in Computer Science, strong OOP, cloud and SQL experience preferred, excellent communication.
Kotlin, Java, Python, .NET, AWS, SQL, CI / CD, LLM
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Senior Software Engineer - Equipment Controls
Wilmington, Massachusetts, United States
$140k-$200k/yr OnsiteFull Time
7+ YOE7+ years developing C++ and C#/.NET software for hardware-adjacent, real-time, or industrial automation systems; BS in related field (or equivalent); experience debugging machine behavior, OO design, HMI development, industrial I/O, and using AI developer tools.
C++, C#, .NET, EtherCAT, PMAC/Delta Tau, PLC, IntervalZero RTX, TwinCAT, Beckhoff, Delta Tau, Galil, ACS, PostgreSQL, Python, RTOS, HMI, SQL, Codex, Claude, Copilot, Oscilloscope, Logic Analyzer, Multimeter
4w
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Senior Software Engineer (Full Stack)
Pittsburgh or Boston or Montreal or Toronto or United States
HybridFull Time
Experienced full-stack developer with C#/.NET backend, React frontend, SQL Server, Python familiarity, modern architecture, CI/CD familiarity, debugging skills, and Agile experience.
React, .NET, Python, SQL Server, C#, SQL
2mo
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Senior Software Engineer
Burlington, Massachusetts, United States
$140k-$165k/yr HybridFull Time
5+ YOEBachelor's in CS or related, 5+ years professional C#/.NET experience, Windows app (WinForms/WPF) and cloud (Azure/AWS) experience, multithreading and backend/API development, ability to work onsite in Burlington, MA 3+ days/week.
C#, .NET, WinForms, WPF, WinUI, .NET MAUI, Azure, AWS, CI/CD
1w
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Staff Software Engineer
Lexington or Lowell or Freising or Switzerland or Singapore
$129k-$173k/yr HybridFull Time
8+ YOEBachelor's degree in computer science, software or computer engineering; 8+ years' software development experience; full-stack, C#/.NET, Angular, TypeScript, SQL, cloud, CI/CD, Agile, and technical leadership experience.
C#, .NET Core, .NET, Angular, TypeScript, SQL Server, Entity Framework, OAuth, OpenID Connect, JWT, Identity, xUnit, NUnit, Docker, Git, Azure, Microsoft, Linux
1mo
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Global IT Software Engineer Manager
Boston or Atlanta
$121k-$157k/yr OnsiteFull Time
5+ YOEBachelor's in CS or related (or equivalent experience), 5+ years software development, proficiency with C#, .NET, Node.js, JavaScript/TypeScript, React, SQL, HTML5, CSS; experience with cloud (Azure/AWS) and AI/LLM integration.
React, .NET, C#, Node.js, JavaScript, TypeScript, SQL, HTML5, CSS, Python, Claude, OpenAI, Azure OpenAI, LangChain, LangGraph, Azure, AWS, AWS Bedrock, Claude Code, GitHub Copilot, Codex
4w
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Senior Full-Stack Software Engineer
Acton or Cranberry Township
OnsiteFull Time
5+ YOEBachelor's in CS or related,5+ years building software with C#, .NET, C++; experience with network protocols, hardware interfaces, APIs, and desktop UI development.
C#, .NET, C++, TCP/IP, UDP
1mo
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Senior Software Engineer (Teradyne, North Reading)
North Reading, Massachusetts, United States
$130k-$207k/yr HybridFull Time
5+ YOE5+ years software development experience, proficiency in C++, C#, .NET, experience with Visual Studio, Clearcase/Git, knowledge of data structures, algorithms, Windows/Linux, BS/MS in Computer or Electrical Engineering.
C++, C#, .NET, Visual Studio, Clearcase, Git, Windows, Linux
1mo
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Principal Solutions Developer , Prototyping and Customer Engineering (PACE)
Boston or Austin or Arlington or Seattle or New York or Herndon or Chicago or San Francisco or Dallas
$183k-$284k/yr OnsiteFull Time
15+ YOE15+ years technical experience, bachelor's in CS/engineering/math (or equivalent), expertise in cloud architecture and CXO engagement, experience developing end-to-end solutions, programming with Python/JavaScript/Go/.Net/Java, EMR of distributed systems.
Python, JavaScript, Go, .Net, Java, AWS
1mo
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Lead SQL Developer
Fort Lauderdale or Boston
HybridFull Time
5+ YOEBachelor's or equivalent, 5+ years programming experience, 5-8 years MS SQL (2016–2025), SSRS/SSIS, Workday integrations, .NET and PowerShell automation, MS Office proficiency, strong communication and problem-solving; must be authorized to work in the U.S.
MS SQL 2016 \u00096 2025, SSRS, SSIS, .NET, PowerShell, Workday, MVC, AngularJS, jQuery, SignalR, SOA, DevOps, Microsoft Access, Microsoft Excel, Microsoft Visio, Microsoft Word, Microsoft PowerPoint
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Staff Software Engineer
Wilmington, Massachusetts, United States
$115k-$173k/yr OnsiteFull Time
10+ YOE10+ years software design for real-time electromechanical systems, expertise in .NET and C#, HW/SW integration, concurrency, API design, EM/IPC technologies, and mentoring experience.
.NET, C#, gRPC
1mo
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Senior Software Engineer
Woburn, Massachusetts, United States
$115k-$130k/yr HybridFull Time
5+ YOE5+ years full‑stack software engineering experience; proficiency with .NET/C#, Angular, SQL Server/PostgreSQL, AWS; strong communication and agile/DevOps experience; BS in CS/engineering required.
.NET, .NET (dotnet), .NET and C#, C#, AWS, Angular, SQL Server, PostgreSQL, JavaScript, TypeScript, GitHub Copilot, Docker, Kubernetes, CI/CD
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