2,126 develop jobs at 768 companies in Gillespie, IL

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Market Development Manager
Cincinnati or St. Louis or Denver or Chicago
$85k-$110k/yr RemoteFull Time
ITW
ITWNYSE: ITW: Global manufacturer of specialized industrial equipment and consumables.
Market Development Manager with experience in business development, account growth, and partnerships; willing to travel up to 60%.
CRM, Salesforce
2mo
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Business Development Manager
St. Louis, Missouri, United States
OnsiteFull Time
Vestal Corporation
Vestal Corporation: Provides integrated engineering, architecture, and construction consulting services.
8+ YOEDevelop and execute business development strategies, build partnerships, manage CRM, and drive market growth in industrial/manufacturing sectors.
Salesforce, CRM, Proposals and presentations, Office tools
1w
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Developer
St Louis, Missouri, United States
OnsiteFull Time
Build-A-Bear
Build-A-BearNYSE: BBW: Sells customizable stuffed animals and provides interactive retail experiences.
5+ YOE5+ years software development experience, proficiency in full-stack OOP (C#, Java), relational databases, HTML/CSS/JavaScript and React, Git, RESTful API development, and Agile methodologies.
C#, Java, SQL, PostgreSQL, HTML, CSS, JavaScript, React, RESTful API, Git, Scrum, Kanban, Azure, AWS, CI/CD, DevOps
1w
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SENIOR SOFTWARE DEVELOPER
Springfield, Illinois, United States
$8k-$12k/mo OnsiteFull Time
State of Illinois
State of Illinois: The executive, legislative, and judicial government of Illinois.
7+ YOEBachelor's-level education plus seven years IT experience, strong skills in ASP.NET,C#.NET,SQL Server,Power BI; provides level-3 support, develops and tests applications, mentors developers.
ASP.NET, C#.NET, SQL Server, Power BI, VB.NET, Crystal Reports, Microsoft Reporting Services
2w
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Software Developer - Advanced (MO, Saint Louis)
St. Louis, Missouri, United States
OnsiteFull Time
RiVidium
RiVidium: Provides cybersecurity software and IT services to federal agencies.
Requires RMF knowledge, experience with Python, HTML, CSS, JavaScript, React, Tableau, database development, and secure full‑stack software development; baccalaureate degree required.
Python, HTML, CSS, JavaScript, React, Tableau
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Developer II
Saint Louis, Missouri, United States
OnsiteFull Time
Stifel Financial
Stifel FinancialNYSE: SF: Financial services firm providing wealth management and investment banking.
2+ YOESoftware development experience with SDLC understanding; strong troubleshooting; proactive problem solving; team collaboration.
C#/.NET, Angular, AngularJS, TFS, Git, MS SQL Server, Microsoft Excel
2mo
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Senior Developer
St. Louis, Missouri, United States
OnsiteFull Time
Rapsodo
Rapsodo: Provides portable sports performance tracking and analytics devices.
8+ YOEBachelor’s or Master’s in CS/Engineering; 8+ years mobile development (Android/iOS); 3+ years Kotlin Multiplatform; strong architecture, KMP, and cross-platform data/UI design; CI/CD; device-connected apps; AI-assisted development experience.
Kotlin, Kotlin Multiplatform, Android, iOS, SwiftUI, Jetpack Compose, Gradle, CI/CD, Dependency Injection, BLE, Wi-Fi, TCP, KMP-iOS interoperability
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Agentic AI Developer
O'Fallon, Illinois, United States
$99k-$225k/yr HybridFull Time
Booz Allen Hamilton
Booz Allen HamiltonNYSE: BAH: Consulting and technology services for government and commercial clients
3+ YOE3+ years software development experience, Python, software design patterns, LLM application development, embeddings/vector DBs/semantic search, agent planning and AI safety knowledge, ability to obtain Secret clearance, Bachelor's degree.
Python, large language models, vector databases, Retrieval-Augmented Generation (RAG)
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Geospatial Developer
Saint Louis or Belleville
OnsiteFull Time
NV5
NV5: Provides engineering, consulting, and geospatial solutions for infrastructure projects.
3+ YOEBachelor's in CS/Geography/GIS, 3+ years web application development, 1+ year ESRI geospatial app development, proficiency with HTML/HTML5/CSS/Python/JavaScript/.NET/JSON, ArcGIS Server, PostgreSQL/Oracle; U.S. citizenship and ability to obtain DoD clearance.
ESRI, Experience Builder, ESRI ArcGIS, ArcGIS Server, PostgreSQL, Oracle, HTML, HTML5, CSS, Python, JavaScript, .NET, JSON, AWS, Docker
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Geospatial Developer
Belleville or Saint Louis
OnsiteFull Time
NV5
NV5: Provides engineering, testing, inspection, and infrastructure consulting services.
3+ YOEBachelor's in CS/Geography/GIS, 3+ years web application development including 1+ year developing geospatial/ESRI apps; proficiency with HTML/HTML5/CSS, Python, JavaScript, .NET, JSON; experience with ArcGIS Server, PostgreSQL/Oracle; U.S. citizen eligible for DoD clearance.
Esri Experience Builder, ArcGIS Server, PostgreSQL, Oracle, HTML, HTML5, CSS, Python, JavaScript, .NET, JSON, AWS, Docker, REST, OGC, DevSecOps
5d
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Software Developer II - Meter Data Management Software (Full Stack, Databricks)
Cedar Rapids or Lake Saint Louis or Mandan
HybridFull Time
NISC
NISC: Provides enterprise software solutions for utility and broadband cooperatives.
5+ YOE5+ years software development experience; proficiency with Databricks, Delta Lake, Spark, AWS, Java or Scala, data pipelines, and cloud-based full‑stack development.
Databricks, Delta Lake, Spark, Kafka, AWS, S3, Lambda, EC2, EMR, SQS, SNS, CloudWatch, Oracle, Postgres, Cassandra, DynamoDB, Java, Scala, Docker, Kubernetes, JIRA, Confluence, Bitbucket, Bamboo, Python, JavaScript, Bash, Angular, Spring Boot, MDM, SQL, CI/CD
2mo
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Applications Developer
St. Louis, Missouri, United States
OnsiteFull Time
XTRA Lease
XTRA Lease: Rents and leases semi-trailers to the transportation industry.
3+ YOEBachelor's in CS or MIS; 3-5 years as a developer; .NET/C#, Angular, HTML5, CSS, SQL Server, WCF.
Microsoft .NET, C#, ASP.NET, Angular, HTML5, CSS, Microsoft SQL Server, WCF, Visual Studio, TFS
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Sr. Application Developer - Legacy System Modernization
Bridgeton, Missouri, United States
OnsiteFull Time
Cass Information Systems
Cass Information SystemsNASDAQ: CASS: Provides invoice processing and payment services for large corporations.
5+ YOE5+ years application development experience, expert C#/.NET and COBOL legacy experience, Microsoft SQL Server, Azure DevOps/GitHub, CI/CD, AI-assisted development, and ability to modernize legacy systems.
C#, .NET, COBOL, SQL, Microsoft SQL Server, GitHub, GitHub Actions, Azure DevOps, HP NonStop, CI/CD
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Software Development Engineer - C++
St. Louis, Missouri, United States
OnsiteFull Time
London Stock Exchange Group
London Stock Exchange GroupLondon Stock Exchange: LSEG: Provides financial market infrastructure and global data analytics services.
Strong C++ programming, Linux development, BS in CS/Engineering, SDLC, debugging, testing, collaboration.
C++, Linux, Python, Bash, PowerShell, Docker, Kubernetes, Rust
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Experienced Software Development Engineer
Hazelwood or Berkeley or St. Louis
$127k-$171k/yr OnsiteFull Time
Boeing
BoeingNYSE: BA: Designing and manufacturing commercial aircraft and defense systems.
5+ YOEBachelor's degree, 5+ years software development experience with C#, .NET, Java, SQL, HTML, CSS; Windows/Linux, containerized architectures (Docker/Podman/Kubernetes), Git, cloud development, and ability to obtain U.S. security clearance (U.S. citizenship required).
C#, .NET, Java, SQL, HTML, CSS, Windows, Linux, Docker, Podman, Kubernetes, Git, CI/CD, CodeVue
2w
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SOFTWARE DEVELOPER II (56246)
Springfield, Illinois, United States
OnsiteFull Time
State of Illinois
State of Illinois: State government agency providing public services for Illinois residents.
Performs software development tasks for a state agency; detailed resume/CV is highly encouraged as part of the application.
1w
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Development Manager
Olivette, Missouri, United States
$60k-$70k/yr OnsiteFull Time
YWCA Metro St. Louis
YWCA Metro St. Louis: Provides community support, crisis intervention, and early childhood education.
3+ YOEBachelor's degree required, 3+ years nonprofit development or fundraising experience, donor/CRM proficiency, strong communications, project management, and relationship-building skills.
CRM systems, Microsoft Office
2mo
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Backend Software Developer
Springfield or Vienna or St. Louis
OnsiteFull Time
INCATech
INCATech: Geospatial software solutions provider focusing on GIS and enterprise data management.
2+ YOE2+ years backend development; Node.js, Python/Java; REST APIs; ArcGIS Enterprise; Docker/Kubernetes; on-site; Top Secret clearance.
Node.js, Python, Java, ArcGIS Enterprise, Docker, Kubernetes, REST APIs, PostgreSQL, PostGIS, SQL Server
3mo
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Full Stack Developer
St. Louis, Missouri, United States
OnsiteFull Time
Stereotaxis
StereotaxisNYSE American: STXS: Manufactures robotic surgical systems for endovascular and cardiac procedures.
3+ YOEBS in CS or related field; 3+ years development; Flutter and ASP.NET; web/mobile tech; CI/CD; US work authorized.
Flutter, ASP.NET, SignalR, WebRTC, C++, Docker, Linux, SQL, Azure, EF Core, Kubernetes, LiveKit
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Director of Development at Hillel at Washington University in St. Louis
St. Louis or New York City or Chicago or Los Angeles or San Francisco
$100k-$115k/yr HybridFull Time
Hillel International
Hillel International: Supports Jewish students through community, education, and campus programs.
8+ YOEBachelor's required; CFRE preferred. Minimum 8 years progressive development experience, 3-5 years major gift experience, proven donor cultivation and fundraising plan execution, strong written/verbal communication, and ability to manage metrics and development operations.