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373 senior software developer jobs at 117 companies in Lancaster, PA

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Founding Full-stack / Product Engineer
Cupertino, CA, US
$130k-$300k/yr On-SiteFull Time
HiringCafe
HiringCafe: Building a 100× better job search engine to take on Indeed and LinkedIn.
Help us build a 100× better job search engine. We need a full-stack engineer with great taste, sharp fundamentals, and a track record of shipping polished product on React/Next.js plus a real backend (Firebase, Elasticsearch, Redis, Stripe).
React, Next.js, TypeScript, Firebase, Elasticsearch, Redis, Stripe
Help us #BeatIndeed & #BeatLinkedIn
3mo
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Senior Software Developer
Aberdeen, Maryland, United States
$104k-$181k/yr OnsiteFull Time
Parsons
ParsonsNYSE: PSN: Provides engineering and technology services for infrastructure and defense.
5+ YOEDesign, develop, and implement software across multiple languages; lead components; troubleshoot; mentor and guide developers; ensure secure, maintainable results. Must be a US citizen with SECRET clearance.
Python, C++, Java, C#, Go, Docker, Kubernetes, CI/CD
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3mo
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Senior Software Engineer - Finance
Hummelstown, Pennsylvania, United States
OnsiteFull Time
Flagger Force
Flagger Force: Provides temporary traffic control and work zone safety services.
5+ YOE5-8 years software development with .NET; strong database, API, and security skills; finance domain knowledge.
C#, .NET Framework, .NET Core, MVC, WPF, React, SQL Server, PostgreSQL, APIs, Confluence
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3mo
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Senior Software Engineer (Prime)
Annapolis Junction, Maryland, United States
$190k-$245k/yr OnsiteFull Time
Intelliforce
Intelliforce: Provides engineering and technical solutions for the intelligence community.
20+ YOETop Secret clearance with Full Scope Polygraph; U.S. citizenship; 20+ years of software engineering; Bachelor's in Computer Science; cloud/big data experience; strong debugging and Agile skills.
Hadoop, Hive, Pig, HDFS, HBase, Accumulo, CloudBase, BigTable, JSON, BSON
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1mo
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Software Engineer - Senior (contingent 045)
Aberdeen Proving Ground, Maryland, United States
OnsiteFull Time
Systems Products and Solutions
Systems Products and Solutions: Provides aviation and ground sustainment services for defense agencies.
7+ YOESenior software engineer with DoD experience, specializes in biometric systems, secure coding, and Agile/DevSecOps.
Android, CI/CD, DevOps, DevSecOps, Security, Encryption
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1mo
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Software Engineer - Senior (contingent 045)
Aberdeen Proving Ground, Maryland, United States
OnsiteFull Time
Systems Products and Solutions: Provides logistics and technical services to defense agencies.
7+ YOESenior software engineer with DoD biometric systems experience; security clearance required; Agile/DevSecOps; Android apps; cybersecurity.
Android, DevOps, DevSecOps, CI/CD, Security testing, Encryption
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3w
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SENIOR SOFTWARE DEVELOPER/ENGINEER (CLOUD/CYBER)
Huntsville or Aberdeen or Colorado Springs or Crestview or Tupelo
OnsiteFull Time
Sentry Construction
Sentry Construction: Provides general contracting and comprehensive property maintenance services.
7+ YOEBS in CS/Software Eng or equivalent, 7+ years software development experience, DoD Top Secret/SCI eligibility, experience with Python, containers, AI/LLMs, databases, Linux, AWS, and Agile/Scrum.
LLMs, Ollama, LM Studio, Python, C#, Go Lang, React, JavaScript, HTML, CSS, Git, Docker, Bash, TensorFlow, PyTorch, SQL, MongoDB, PostgreSQL, Redis, Linux, AWS, RESTful API, Agile/Scrum
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3mo
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Senior Embedded Software Engineer
Towson, Maryland, United States
$70k-$130k/yr HybridFull Time
Stanley Black & Decker
Stanley Black & DeckerNYSE: SWK: Manufacturer of power tools, hand tools, and outdoor equipment.
3+ YOE3+ years embedded software; BSEE/BSCS/BSCE or equivalent; C, ARM, RTOS; battery/motor control knowledge; design firmware and tests; collaborate across teams
C, C++, ARM, RTOS, assembly
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2mo
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Sr. Software Engineer
Milford or Cocoa Beach or Orlando or Sioux Falls or Orlando or Jacksonville or Columbus or York Haven or Birmingham or Augusta or Nashville or Houston or Dallas or Albuquerque or Columbia or Milwaukee or McAllen or El Paso or San Antonio or Salt Lake City or Charlotte or Phoenix or Sunrise or Louisville or Sunrise
$150k-$175k/yr OnsiteFull Time
BeneLynk
BeneLynk: Provides social care advocacy and government benefit enrollment assistance.
8+ YOE8+ years software development; strong in C#/.NET; REST APIs; Azure; scalable SaaS; distributed teams; healthcare/regulatory context.
C#, NET, REST APIs, Azure, SQL, SaaS
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2w
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Senior Software Engineer
Aberdeen, Maryland, United States
$90k-$198k/yr OnsiteFull Time
CGI
CGINYSE: GIB: Provides information technology and business consulting services.
10+ YOE10+ years software engineering experience in Defense, BA/BS or equivalent experience, proficiency with C++, Java, Python, C#, secure coding and Defense standards, DoD cybersecurity certification preferred.
C++, Java, Python, C#, Git, SVN, CI/CD, automated testing tools
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3w
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Senior Software Engineer
King of Prussia, Pennsylvania, United States
$93k-$186k/yr OnsiteFull Time
Lockheed Martin
Lockheed MartinNYSE: LMT: Designs and manufactures global security and aerospace systems.
5+ YOETop Secret clearance and US citizenship required. Bachelor's +5 years or Master's +3 years (or equivalent). Experience with OO programming, DevSecOps (GitLab CI/CD), automated testing, Linux (RHEL), C++, and Agile development.
C++, Linux, Qt, GitLab CI/CD, Git, Jira, Confluence
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1w
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Senior Software Engineer
Oaks, Pennsylvania, United States
HybridFull Time
SEI
SEINASDAQ: SEIC: Provides technology and investment solutions for financial services institutions.
5+ YOEBachelor's in CS/IT/EE plus 5+ years application development in financial services; 5 years with .Net Core,.Net Framework,MS SQL Server,REST,JSON,SSRS,Tableau,Crystal Reports,Git,Docker,Kubernetes,Jenkins,TeamCity,Octopus,Ansible,Terraform,JIRA,Confluence,Bitbucket,Investran,Visual Studio; 1 year Swagger,Postman,Angular.
.Net Core, .Net Framework, MS SQL Server, REST, JSON, SSRS, Tableau, Crystal Reports, Git, Docker, Kubernetes, Jenkins, TeamCity, Octopus, Ansible, Terraform, JIRA, Confluence, Bitbucket, Investran, Visual Studio, Swagger, Postman, Angular
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3w
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Senior Software Engineer - Personal Insurance
Hartford or Atlanta or St. Paul or Hunt Valley
$139k-$230k/yr HybridFull Time
Travelers
TravelersNYSE: TRV: Provide property and casualty insurance for individuals and businesses.
6+ YOEBachelor's in CS or related STEM and 6+ years software engineering experience; Salesforce development preferred (Apex, LWC, APIs); experience with database design, CI/CD, cloud platforms, Agile, and technical leadership.
Salesforce, Apex, Lightning Web Components, Salesforce APIs, AWS, Azure, CI/CD, DevOps, Agile
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2d
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Software Developer
Exton or Philadelphia
RemoteFull Time
CAP Index
CAP Index: Provides data-driven crime risk forecasting and security management solutions.
5+ YOE5+ years professional software development experience with C# and .NET; experience with React, TypeScript, SQL Server, PostgreSQL, Docker, testing tools, and CI/CD; bachelor's degree or equivalent experience preferred.
C#, .NET, React, SQL Server, PostgreSQL, ASP.NET Core, Entity Framework Core, TypeScript, Testcontainers, Playwright, Docker, Docker Compose, GitHub Actions, xUnit, Bicep, Azure Container Apps, Kubernetes
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1mo
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Software Developer
Belcamp, Maryland, United States
$83k-$140k/yr OnsiteFull Time
ManTech
ManTech: Provides technology solutions for defense and intelligence agencies.
10+ YOEBSc and 10+ years software development experience, U.S. citizenship with active Secret clearance, proficiency with Java/Python/C#/JavaScript, Linux/Windows experience, testing and documentation skills, DoD experience preferred.
Java, Python, C#, JavaScript, Linux, Windows
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3mo
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1650 - Software Developer
Belcamp, Maryland, United States
$83k-$140k/yr OnsiteFull Time
Sigma Defense: Develops tactical communications and intelligence systems for defense.
10+ YOE10+ years in software development; 5+ years DoD software support; strong requirements analysis, architecture, and coding skills; Java, Python, C#, and JavaScript; ability to document software; U.S. citizen; Secret security clearance or higher; Bachelor's Science degree.
Java, Python, C#, JavaScript
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1mo
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Senior Software Engineer
Wilmington or London or Amsterdam
HybridFull Time
CSC
CSC: Provides global business administration and compliance solutions.
Expertise with C# and .NET Core, Blazor, Entity Framework Core, SQL Server, Azure Functions, Playwright, JavaScript/TypeScript, and experience building AI-enabled applications and AI-augmented SDLC practices.
C#, .NET Core, Blazor Server, Blazor WebAssembly, GitHub Copilot, Cursor, Claude Code, Entity Framework Core, SQL Server, Azure Functions, Bootstrap, Playwright, JavaScript, TypeScript, Azure Pipelines, Git, MediatR, Clean Architecture, Fluxor, Polly, Artillery, JMeter, K6, Locust, Docker, Kubernetes, Azure AI Foundry, Azure OpenAI Service
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2mo
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Software Engineer Senior
Aberdeen Proving Ground, Maryland, United States
$95k-$150k/yr OnsitePart Time
RSC2
RSC2: Provides technical and engineering services to federal defense agencies.
8+ YOEActive Top Secret clearance; Master’s in engineering or computer science; 8+ years related experience; part-time, salary-exempt; Aberdeen Proving Ground, MD.
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2mo
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Senior Software Engineer (Oracle Cloud Team)
Owings Mills, Maryland, United States
$121k-$206k/yr HybridFull Time
T. Rowe Price
T. Rowe PriceNASDAQ: TROW: Provides global investment management and retirement planning services.
Hands-on Oracle Cloud expert with ERP, EPM, OIC, OTBI, and APEX; strong SDLC and Agile delivery experience.
Oracle Integration Cloud, Oracle Cloud ERP, Oracle EPM, OTBI, Oracle APEX
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2mo
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Senior Software Engineer (Exton, PA, US)
Exton or Philadelphia
HybridFull Time
Bentley Systems
Bentley SystemsNASDAQ: BSY: Software for designing, building, and operating global infrastructure.
BS or MS in computer science or software engineering; strong: C#, .NET Core, OpenID, OAuth; Git; Azure DevOps; Agile (SCRUM); Azure REST APIs/SDKs; OO design patterns; independent contributor without travel.
C#, .NET Core, OpenID, OAuth, Git, Azure DevOps, Azure REST APIs, Azure Services SDKs, Object oriented programming
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1mo
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Senior Software Engineer, Medical Device
Newark, Delaware, United States
$107k-$167k/yr HybridFull Time
Hologic
HologicNASDAQ: HOLX: Develops medical technology for women's healthcare and diagnostics.
5+ YOEExpert in .NET/C# and object-oriented design with strong CS fundamentals, multithreading, debugging, CI/CD and software architecture; 5+ years (Bachelors) or 4+ years (Masters) experience; mentoring and technical leadership skills; medical device experience a plus.
.NET, C#, WPF, Java, Android, C++, C, DICOM, HL7, CICD
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