17 app developer jobs at 14 companies in Belvidere, IL
🚀PromotedHiringCafe
Founding Full-stack / Product Engineer
Cupertino, CA, US
$130k-$300k/yrOn-SiteFull Time
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).
Blain's Farm & Fleet: Retailer of farm, home, automotive, and outdoor goods.
5+ YOE5+ years software development experience; proficiency in Java, C#, Python, JavaScript; strong system architecture, design patterns, data modeling, cloud and application security knowledge; bachelor's in CS/Engineering preferred; experience with SaaS platforms (Adobe, Oracle) preferred.
Complete TransPack Solutions: Provides transport packaging management and logistics services for manufacturers.
1+ YOEBuild a mobile prototype with on-device object detection using YOLO variants; prepare annotated dataset (300–500 images); train, optimize, and export models (CoreML/TensorFlow Lite); embed models on edge; proficiency in Python, OpenCV/PyTorch/TensorFlow, and mobile frameworks; US work authorization and portfolio/GitHub required.
Life Fitness: Designs and manufactures commercial and home fitness equipment.
3+ YOE3+ years OO design and Android development; Java/Kotlin; experience debugging Android apps; strong problem-solving and collaboration; BS in CS/SE/CE or related.
Java, Kotlin, Android, OO design, SDKs/Logs, VS Code, GitHub Copilot, Firebase Crashlytics, Real Time Databases, AOSP
IFS: Provides enterprise software for asset-intensive and service industries.
2+ YOE2–5 years in software engineering, solutions engineering, or ML deployment; Python proficient; knowledge of AI/ML frameworks; experience building LLM apps and integrating with enterprise systems.
Convr: AI platform for commercial property and casualty underwriting automation.
10+ YOE10+ years full-stack/frontend experience, proficiency in TypeScript/JavaScript and other languages, Next.js App Router and tRPC experience, strong commercial P&C insurance knowledge, excellent communication and consulting skills.
SiemensXETRA: SIE: Manufactures industrial automation, infrastructure, and energy technology systems.
8+ YOEBachelor's degree in CS/IT/Mechanical Engineering or related, 8+ years experience (6+ years building frontend apps with JavaScript/ES6, HTML5/CSS3, Web Components, Webpack/Gulp/Babel/Rollup; 5+ years with Lit HTML/Lit Element). Unit testing and PWA experience required.
Java, JavaScript, ES6, DOM, HTML5, CSS3, Web Components, Webpack, Gulp, Babel, Rollup, Progressive web application (PWA), Lit HTML, Lit Element, JEST, Enzyme, Jasmine, Karma, Mocha, Chai, Istanbul, Protractor
Fairbanks Morse Defense: Provides naval power and propulsion systems to defense fleets.
3+ YOE3+ years full-stack experience with React, Python, Node.js, Azure, and .NET MAUI; experience with RAG, OCR, offline-first mobile apps, Azure Government Cloud, and secure production deployments.
Microsoft Azure Government Cloud, Azure OpenAI Service, React, Python, Node.js, .NET MAUI, Azure AI Vision, Azure Document Intelligence, Azure AI Search, Microsoft Project, Microsoft Semantic Kernel, LangChain, LangGraph, PouchDB, CouchDB, SQLite, Git, Docker, Blazor Hybrid, SCADA, HMI
AARNYSE: AIR: Provides aftermarket products and services to global aviation customers.
3+ YOEExperience in app performance, monitoring/observability; Bachelor's degree or equivalent; 3+ years IT monitoring; strong knowledge of monitoring tools; Linux/Windows; Azure; scripting (Python, Bash, Ansible); analytical and collaborative skills.
New Relic, Python, Bash, Ansible, Azure, Linux, Windows, Networking, Databases, Web platforms
Convr: AI platform for commercial property and casualty underwriting automation.
8+ YOEBachelor's in CS or similar, 8+ years coding with Python and enterprise apps, commercial P&C insurance experience, RESTful microservices, DB experience (Elastic, Snowflake, Cassandra, MariaDB, MySQL), and Agile experience.
RDSolutions: Specialized provider of retail pricing intelligence and data solutions.
Must be 18+, high school diploma or equivalent, reliable transportation with valid driver's license and insurance, smartphone to run company app, ability to stand for shifts and lift up to 40 lbs, attention to detail and reliability.
RDSolutions: Specialized provider of retail pricing intelligence and data solutions.
High school diploma or equivalent, 18+ years old, valid driver\u0002s license, reliable transportation and insurance, smartphone to run company app, ability to stand and lift up to 40 lb, dependable and detail oriented.
RDSolutions: Specialized provider of retail pricing intelligence and data solutions.
Must be 18+, high school diploma or equivalent, smartphone capable of company app, valid driver’s license/clean driving record, reliable transportation and insurance, able to stand and lift up to 40 lb, willing to work in cold store environments.
Circana: Provides predictive analytics and data insights for consumer markets.
Must be 18+, have a valid driver’s license and reliable insured vehicle, able to stand long periods, lift 25 lbs, use a mobile scanning app, meet deadlines, work independently, and have reliable Wi‑Fi; HS/GED preferred.
American Credit Acceptance: Provider of auto financing solutions for consumers.
1+ YOE1+ years of sales and finance experience; Bachelor's preferred; proficient with Microsoft apps; CRM experience preferred; strong communication; able to travel.