378 developer tools jobs at 217 companies in Middletown, DE

2w
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CEUI Assisted Tools Engineer
Philadelphia, Pennsylvania, United States
OnsiteFull Time
Comcast
ComcastNASDAQ: CMCSA: Provides global telecommunications, media content, and entertainment services.
2+ YOE2+ years full-stack experience building React.js UIs and backend services (Node.js/Java), strong JavaScript/TypeScript, HTML/CSS, REST APIs, state management, databases, Git, CI/CD, troubleshooting, Agile experience.
React.js, Node.js, Java, JavaScript (ES6+), TypeScript, HTML/CSS, REST APIs, Redux, Context API, Git, CI/CD, Github Copilot, OpenSpec
1mo
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Software Developer | Market Data | Libraries & Tools
Bala Cynwyd, Pennsylvania, United States
OnsiteFull Time
Susquehanna International Group
Susquehanna International Group: Global quantitative trading firm providing proprietary financial market liquidity.
BS/MS in CS or Computer Engineering, strong C++ high-performance computing skills, performance optimization/latency reduction experience, attention to detail, collaboration with developers, traders, quants, and infrastructure teams.
C++, Python, RESTful services, Linux, Windows
1mo
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Software Developer | Market Data | Libraries & Tools
Bala Cynwyd, Pennsylvania, United States
OnsiteFull Time
Susquehanna International Group
Susquehanna International Group: Global quantitative trading and market making firm.
BS/MS in CS or CE (or similar). Strong C++ high-performance computing skills, familiarity with Python, experience with performance optimization/latency reduction, ability to collaborate with developers, traders, quants, and infrastructure teams.
C++, Python, RESTful services, Linux, Windows
1mo
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Software Developer | Market Data | Libraries & Tools
Bala Cynwyd, Pennsylvania, United States
OnsiteFull Time
Susquehanna International Group
Susquehanna International Group: Global quantitative trading firm specializing in proprietary financial markets.
BS/MS in CS or related, strong C++ high-performance computing skills, performance optimization/latency reduction experience, familiarity with Python, RESTful services, Linux/Windows, and ability to collaborate with traders and quants.
C++, Python, RESTful services, Linux, Windows
3w
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Junior Developer
Paradise, Pennsylvania, United States
$28-$34/hr OnsiteFull Time
Paradise Energy Solutions
Paradise Energy Solutions: Full-service solar energy installation and maintenance provider.
Experience with API integration, databases, and coding in multiple languages (preferably PHP, Python, JavaScript). Familiarity with Jira, Git, Trello, QuickBase/Zoho, and comfortable using AI-assisted development tools.
PHP, Python, JavaScript, GitHub Copilot, Jira, Git, Trello, QuickBase, Zoho, Sage Intacct, REST APIs
4d
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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
1mo
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Staff Software Engineer (Frontend Developer)
Colorado Springs or King of Prussia or California or Massachusetts or New York or Colorado or Hawaii or Illinois or Maryland or Minnesota or New Jersey or Vermont or Washington or District of Columbia
$114k-$227k/yr HybridFull Time
Lockheed Martin
Lockheed MartinNYSE: LMT: Designs and manufactures global security and aerospace systems.
5+ YOEFrontend development with Angular, JavaScript, CSS, HTML; REST and Docker experience; UI/UX tools and test frameworks; 5+ years relevant experience; Secret clearance and U.S. citizenship required/preferred candidates in CO or PA.
Angular, JavaScript, CSS, HTML, REST, Docker, Figma, MockFlow, UXPin, Axure, Cypress, Selenium, Playwright, Jest, Kubernetes, Helm, GitLab CI/CD, gRPC, Python, Flask
2mo
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Software Engineer - AI Augmented Development
Wayne, Pennsylvania, United States
HybridFull Time
PowerPay
PowerPay: Digital lending platform for home improvement and healthcare loans.
1+ YOEProficient in Python and SQL; strong AWS experience; able to use AI-assisted development tools; effective communicator.
Python, SQL, AWS, Snowflake (nice to have), AI tools (Claude Code, OpenAI Codex, Cursor, Copilot), CloudFormation or CDK, Terraform (nice to have), SQL
1mo
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Application Developer C
Philadelphia, Pennsylvania, United States
$72k/yr OnsiteFull Time
University of Pennsylvania
University of Pennsylvania: Research university offering higher education and healthcare services.
2+ YOEBachelor's degree + 2–3 years experience (Master's preferred). Experience with Python, Next.js, Electron, software development, data pipelines, AI tools for image analysis; strong analytical and communication skills.
Python, Next.js, Electron
4w
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Full Stack Developer
Parsippany or Conshohocken or Wilkes Barre or Alpharetta
$78k-$180k/yr HybridFull Time
Berkshire Hathaway GUARD Insurance Companies
Berkshire Hathaway GUARD Insurance CompaniesNYSE: BRK.B: Provider of commercial property and casualty insurance products.
Degree in computer science or equivalent experience; backend development (C#/.NET or similar); frontend frameworks (React/Angular/Vue); cloud (Azure); databases (SQL/NoSQL); Git, CI/CD, and experience with AI-assisted development tools (e.g., GitHub Copilot).
C#, .NET, React, Angular, Vue, Azure, SQL, NoSQL, Git, GitHub Copilot, ChatGPT, CI/CD, DevOps, OAuth, OpenID, Scrum, Kanban
1mo
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Application Developer C
Philadelphia, Pennsylvania, United States
$72k/yr OnsiteFull Time
University of Pennsylvania
University of Pennsylvania: Provides Ivy League higher education and conducts advanced scientific research.
2+ YOEBachelor's and 2+ years' experience required. Develop, deploy, and maintain pathology software, data pipelines, and AI-enabled tools; experience with Python, Next.JS, electron, web apps, databases, APIs, and version control; strong analytical and communication skills.
Python, Next.JS, electron
2mo
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Mid Level Software Engineer
Baltimore, Maryland, United States
$125k-$150k/yr HybridFull Time
BlackSea Technologies
BlackSea Technologies: Designs and manufactures autonomous maritime vessels and defense hardware.
3+ YOE3-7 years software engineering, strong C++, distributed systems, robotics/autonomy, AI-assisted development tools; APIs and networking experience.
C++, MAVLink, Protobuf, DDS, CAN, TCP/IP, serial, OpenAI Codex, Claude Code
2mo
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Software Engineer 2
Annapolis Junction, Maryland, United States
HybridFull Time
Entegra Systems
Entegra Systems: Provides engineering and intelligence analysis for government missions.
14+ YOESenior backend developer with TS/SCI CI Poly clearance; Java/Spring/Maven; 14+ years experience; BS in CS or related field; NoSQL/Big Data and CI tools
Java, Spring Framework, Maven, MongoDB, ElasticSearch, Jenkins, Git, PostgreSQL, Python, Hadoop, Hive, Pig, MapReduce, NoSQL
1mo
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Full Stack Developer
United States or Philadelphia
$160k-$180k/yr RemoteFull Time
SMB Team
SMB Team: Provides digital marketing and coaching services for law firms.
6+ YOE6+ years full-stack development experience; must show portfolio; autonomous; current on AI tooling; proficiency in JavaScript/TypeScript (React, Node.js), RESTful APIs, GraphQL, cloud (AWS/GCP/Azure), serverless; experience with AI APIs and Git.
JavaScript, TypeScript, React, Node.js, RESTful APIs, GraphQL, AWS, GCP, Azure, Serverless, OpenAI, Anthropic, Git, GitHub, CI/CD, HubSpot, Asana, PandaDoc, Slack, Google Workspace
2w
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Principal Software Engineer
Baltimore or Seattle or Vienna or United States or United States
$220k-$372k/yr HybridFull Time
NetApp
NetAppNasdaq: NTAP: Provides intelligent data infrastructure for hybrid cloud environments.
12+ YOE12+ years software development, 5+ years data management/storage experience, 3+ years cloud-native and SOA expertise, proficiency with storage protocols and listed programming tools, strong communication and architectural skills.
C, C++, Golang, Node.js, Python, Docker, Kubernetes, GitHub, Jenkins, Ansible, CI build systems, Automated Testing, NFS, SMB, iSCSI
2mo
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Principal Software Engineer
Dresher or Philadelphia
OnsiteFull Time
Ascensus
Ascensus: Administers tax-advantaged retirement and education savings plans.
Bachelor's degree in computer science or engineering; strong technical leadership; AI tooling experience; hands-on software development; Agile experience; excellent problem-solving and communication skills.
C, C++, Python, Apache, Nginx, Redis, jQuery, PowerShell, React, Docker, Kubernetes, CI/CD, TDD, Agile
2d
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Application Engineer - II
Malvern or Charlotte
HybridFull Time
Vanguard
Vanguard: Provides mutual funds, ETFs, and investment management services.
3+ YOE3+ years related experience with 1+ year development; undergraduate degree or equivalent; experience with database design, SQL, API integration; proficiency with Java, Spring Boot, Angular, Node JS, AWS, CI/CD and Agile tools.
Java, Spring Boot, Angular, Node JS, AWS, SQL, Github, Bitbucket, Bamboo, CI/CD, TDD/BDD, Python, Confluence, JIRA, Azure, GCP
1mo
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Lead Software Engineer
Wilmington, Delaware, United States
OnsiteFull Time
JPMorgan Chase
JPMorgan ChaseNYSE: JPM: Global financial services firm providing banking and investment solutions.
5+ YOE5+ years software engineering experience; building high-volume, low-latency transactional systems; microservices with Java/Spring Boot and Python (FastAPI/Flask); AWS services experience; SQL/RDBMS proficiency; agile/SCRUM and experience with AI-assisted development tools.
Java, Python, Spring Boot, FastAPI, Flask, S3, DynamoDB, ECS, EKS, RDS, Lambda, ALB, NLB, GitHub Copilot, Claude, Splunk, Dynatrace, Grafana, RDBMS, SQL, JDBC, Databricks
1mo
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Full-Stack Engineer
Philadelphia, Pennsylvania, United States
HybridFull Time
CapTech
CapTech: Provides technology and management consulting services to large enterprises.
6+ YOE6+ years designing and developing applications on the Microsoft Stack or Java; RESTful API design with Swagger/OpenAPI; SQL Server and NoSQL experience; front-end using JavaScript/TypeScript and modern frameworks; AI tool and agent experience; strong communication.
Microsoft Stack, Java, RESTful APIs, Swagger, OpenAPI, SQL Server, NoSQL, Azure, AWS, GCP, JavaScript, TypeScript, HTML, CSS, Angular, React, Vue, Bootstrap, Agentic AI, Claude code, CodeX, Opencode, OpenClaude, Git
1mo
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Sr. AI Developer
Boston or New York City or Santa Monica or Washington or California or Los Angeles or San Francisco or Philadelphia or Orange County or San Diego
$134k-$237k/yr OnsiteFull Time
Goodwin Procter
Goodwin Procter: Legal services for innovators and investors in high-growth industries.
Bachelor's degree required; experience with Microsoft Azure tools (Power Automate, Power Desktop, Forms, Azure AI Studio), Microsoft Azure Machine Learning, Microsoft Dynamics CRM, and Microsoft Excel; strong attention to detail and data management skills.
Microsoft Power Automate, Microsoft Power Desktop, Microsoft Forms, Microsoft Azure AI Studio, Microsoft Azure Machine Learning, Microsoft Azure, Generative AI (GenAI), Microsoft Dynamics CRM, Microsoft Excel