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/yr OnsiteFull Time
Parsons
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.
Python, C++, Java, C#, Git, CI/CD, Docker
1mo
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Software Quality Engineer (Mid-Level or Senior)
Ridley Park, Pennsylvania, United States
$107k-$177k/yr OnsiteFull Time
Boeing
BoeingNYSE: BA: Designs and manufactures aircraft, defense systems, and space technology.
3+ YOEBachelor's degree in engineering/science and 3+ years in software quality; experience with SDLC, QA processes, and audits.
Git, Jira, Collaborator, Bitbucket, Beyond Compare, DevOps, SDLC, Agile, AS9115, DO-178, MIL-STD-882E, QMS
1mo
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Software Quality Engineer (Mid-Level or Senior)
Ridley Park, Pennsylvania, United States
$107k-$177k/yr OnsiteFull Time
Boeing
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.
Git, Jira, Collaborator, Bitbucket, Beyond Compare
2w
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Full Stack Mid-level Java Software Engineer
Wilmington, Delaware, United States
$64k-$106k/yr OnsiteFull Time
WSFS Bank
WSFS BankNASDAQ: WSFS: Provides regional banking, wealth management, and cash logistics services.
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.
Java, Python, JavaScript, C#, Spring Boot, RESTful, Azure, Kubernetes, CI/CD, Prometheus, Grafana, Datadog, JUnit, Mocha, Terraform, CloudFormation, SQL, NoSQL
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Software Engineer - Level 2
King of Prussia, Pennsylvania, United States
$77k-$135k/yr OnsiteFull Time
Lockheed Martin
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.
GitLab, Kubernetes, Docker, Rancher, Java, JavaScript, Jenkins, SpringBoot, Quarkus, LIT, Node.js/Express, Python, Helm, GIT
4mo
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Entry to Mid-Level Geotechnical Field Technician
Doylestown, Pennsylvania, United States
HybridFull Time
Penn E&R
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.
gINT, GeoStudio, Plaxis, AutoCAD
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Software Engineer - Level III
Aberdeen Proving Grounds, Maryland, United States
$108k-$162k/yr OnsiteFull Time
Augustine Consulting
Augustine Consulting: Provides technical and engineering services to the US Department of Defense.
5+ YOESecurity clearance required; US citizenship; multiple education paths with experience; strong web development skills.
HTML, CSS, JavaScript, Python, PHP, SQL, Photoshop, Dreamweaver
2w
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Mid-Level Electrical Engineer (Generation)
Boise or Meridian or Seattle or Houston or Oradell or Mount Laurel or Overland Park or Atlanta
$86k-$151k/yr OnsiteFull Time
WSP
WSPToronto Stock Exchange: WSP: Provides engineering, design, and environmental consultancy services globally.
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.
CADD, Aspen, CAPE, ETAP, AutoCADD
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Mid-Tier Application and Database Developer
Philadelphia, Pennsylvania, United States
$115k/yr HybridFull Time
AGE Solutions
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
1mo
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Software Engineer
Arlington or Mount Laurel or San Diego or Fall River
$90k-$184k/yr HybridFull Time
Innovative Defense Technologies
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.
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Software Engineer
Chicago or St. Louis or Philadelphia
$75k-$95k/yr HybridFull Time
ProSight Financial Association
ProSight Financial Association: Professional association for financial services research and training.
3+ YOE3+ years software engineering experience with .NET/C#, SQL, Microsoft Azure (Functions, App Services, DevOps), front-end skills (HTML, CSS, JavaScript, React.JS/Angular JS), containerization (Docker, Kubernetes), and CI/CD practices.
.NET, C#, SQL, Microsoft Azure, Azure Functions, Azure App Services, Azure DevOps, HTML, CSS, JavaScript, React.JS, Angular JS, Docker, Kubernetes, Microsoft SQL Server, MySQL, PostgreSQL, Terraform, ARM templates, PHP, CI/CD, RESTful APIs
3mo
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Software Engineer
Moorestown, New Jersey, United States
$88k-$149k/yr OnsiteFull Time
ASRC Federal
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.
Java, C++, Python, Linux, UNIX, Eclipse, UML, JUnit, CPPUnitLite, Clearcase, JIRA, xUnit
1mo
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Software Developer
Philadelphia, Pennsylvania, United States
$92k-$154k/yr HybridFull Time
AVEVA
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.
C#/.NET, C++, JavaScript
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Software Engineer
Aberdeen Proving Ground, Maryland, United States
$76k-$156k/yr HybridFull Time
CACI International
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.
C++, Python, Linux, React, Angular, VUE, HTML, CSS, TypeScript, REST APIs, PostgreSQL, PostGIS, SQLite, Git, CI/CD, Docker, Ansible, Cobbler
2mo
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Software Engineer
Moorestown, New Jersey, United States
OnsiteFull Time
ECS
ECSNYSE: ASGN: Provides advanced technology and engineering services to government agencies.
2+ YOEBachelor’s in CS or equivalent; 2+ years C++ software development; OO C++; real-time, multi-processor software; Linux; Git/GitLab; UML; automated testing; embedded applications.
C++, Linux, Git, GitLab, Confluence, UML, Automated Testing Tools
1w
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Software Engineer III
Mt. Laurel or Bala Cynwyd or Philadelphia or United States
$100k-$115k/yr HybridFull Time
Philadelphia Insurance Companies
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.
1w
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Software Engineer III
Mount Laurel or Bala Cynwyd or United States
$100k-$115k/yr HybridFull Time
Philadelphia Insurance Companies
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.
2w
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Senior Software Engineer, IT Software Engineering
Dresher or Iowa or Lake Mary
OnsiteFull Time
Ascensus
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
3mo
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Nuuly Services Software Engineer - Level III
Philadelphia, Pennsylvania, United States
OnsiteFull Time
Urban Outfitters
Urban OutfittersNASDAQ: URBN: Multi-brand retail operator of lifestyle apparel and home goods.
4+ YOE4+ years backend development; JVM languages; streaming data; cloud providers; distributed systems; testing; ability to lead feature design.
Kotlin, Java, Scala, Spring, Micronaut, Kubernetes, Cloud (GCP AWS Azure), Kafka, Spark, Storm, Cassandra, HTTP, JSON, REST, JUnit, Test-Driven Development
1w
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Software Systems Engineer
Auburn or Aberdeen
$65k-$175k/yr OnsiteFull Time
Integrated Solutions for Systems
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.
C++, cmake, Docker, Kubernetes, Helm, git, CI/CD