322 mid level software engineer jobs at 166 companies in Elsmere, DE
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Mid Software Engineer
Aberdeen, Maryland, United States
$104k-$181k/yrOnsiteFull Time
ParsonsNYSE: PSN: Provides engineering and technology services for infrastructure and defense.
5+ YOEBachelor's in CS or related field with 5 years experience, or 8 years experience; Python, C++, Java, C#; software development lifecycle; US citizenship and SECRET clearance.
BoeingNYSE: BA: Designing and manufacturing commercial aircraft and defense systems.
3+ YOEBachelor's degree in engineering or CS; 3+ years in software quality; experience with SDLC, QA processes; agile; AS9100/AS9115 knowledge; ability to obtain TS clearance.
3+ YOEBachelor's degree in CS or related, 3+ years Java-focused software development, experience with Spring Boot, microservices, Azure, Kubernetes, CI/CD, monitoring tools, testing frameworks, and security best practices.
Lockheed MartinNYSE: LMT: Designs and manufactures global security and aerospace systems.
Experience with Java/JavaScript, CI/CD (GitLab/Jenkins), large-scale software projects, software testing, and ability to obtain TS/SCI clearance; US citizenship required.
Penn E&R: Provides environmental consulting, civil engineering, and site remediation services.
2+ YOEBachelor’s degree in environmental sciences, engineering or geology; 2-4 years geotechnical drilling/logging; EIT/GIT bonus; ability to work on-site and manage small projects; knowledge of geotechnical testing and logging; software knowledge a plus.
5+ YOEBachelor's in Electrical Engineering, 5+ years experience, EIT, proficiency with power system design, codes, and discipline-specific software; ability to lead projects and mentor junior staff.
AGE Solutions: Technology consulting and IT services for government agencies.
10+ YOE10 years in middle-tier and database development; strong C#, .NET, REST APIs; Oracle/SQL Server/PostgreSQL; SOLID; DoD Secret clearance or ability to obtain T3 investigation.
C#, dotnet, ASP.NET Web API, Oracle, SQL Server, PostgreSQL, Entity Framework, Dapper, TFVC, Git, Docker, Kubernetes
Arlington or Mount Laurel or San Diego or Fall River
$90k-$184k/yrHybridFull Time
Innovative Defense Technologies: Develops automated software and systems solutions to rapidly deliver mission-critical capabilities for U.S. defense customers.
3+ YOE3+ years experience in software engineering, bachelor’s degree or equivalent, ability to obtain/maintain Secret clearance, familiarity with SDLC, OOP, distributed systems, algorithms, testing, configuration management, and strong communication skills.
ASRC Federal: Provides engineering and IT services to federal government agencies.
3+ YOEBachelor’s degree or higher in Engineering, Computer Science, Math, Physics, or related field; ability to obtain a government secret clearance; 2-4 years in software development; experience with Java, C++, Python; Linux/UNIX; Agile; OO design; UML.
AVEVA: Industrial software for engineering and operational performance management.
3+ YOE3+ years software/product development; degree in engineering, computer science, math, or physics; experience with C#/.NET, C++, JavaScript; strong debugging, communication, and design skills.
CACI InternationalNYSE: CACI: Provides information technology and engineering services for government agencies.
3+ YOEBachelor's in CS/Software/Electrical, 3+ years software development, U.S. citizenship, TS/SCI clearance (CI Poly ability), strong C++ and Python, Linux, geospatial and DSP familiarity, UI and API development experience.
Mt. Laurel or Bala Cynwyd or Philadelphia or United States
$100k-$115k/yrHybridFull Time
Philadelphia Insurance Companies: Specialty commercial property and casualty insurance provider.
Hands-on software engineering across the SDLC including development, testing, deployment, production support, APIs, integrations, databases, CI, and collaboration with architects and stakeholders.
Philadelphia Insurance Companies: Commercial property and casualty insurance underwriting and services provider.
Hands-on software engineering across SDLC; experience with application development, APIs, integrations, databases, CI/CD, troubleshooting, and collaborating with technical and business stakeholders.
Ascensus: Administers tax-advantaged retirement and education savings plans.
3+ YOE3+ years software engineering experience, bachelor\u0002s degree or equivalent, strong Python/JS/TypeScript/SQL skills, experience building production services, familiarity with LLM/RAG/agent workflows, strong engineering fundamentals.
Python, JavaScript, TypeScript, SQL, Cursor, Claude Code, Temporal, Azure, Azure AI Foundry, Azure DevOps, Salesforce, Langfuse, New Relic, OpenTelemetry, GitHub Copilot
Integrated Solutions for Systems: Provides engineering, systems integration, and research for defense.
Bachelor's in engineering/computer science, US citizenship, ability to architect software, produce system engineering artifacts, develop test plans, perform integration, and travel for customer support.