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3 lead full stack engineer jobs at 2 companies in O'Fallon, IL

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Founding Full-stack / Product Engineer
Cupertino, CA, US
$130k-$300k/yr On-SiteFull Time
HiringCafe
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).
React, Next.js, TypeScript, Firebase, Elasticsearch, Redis, Stripe
Help us #BeatIndeed & #BeatLinkedIn
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Lead Software Engineer
O'Fallon, Missouri, United States
HybridContract
Delan Associates
Delan Associates: Provides engineering and professional services to government agencies.
Bachelor's in CS/IS, strong full-stack Java, API, Angular, React skills; experience with Agentic frameworks, MCP and LLM integrations; Qlik Sense and data architecture experience; strong analytical and communication skills.
Java, APIs, Angular, React, Agentic Frameworks, MCP, LLMs, Qlik Sense, Tableau, Power BI, WebFocus, Hadoop, Kafka
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1mo
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Lead Software Engineer
O'Fallon, Missouri, United States
$140k-$231k/yr OnsiteFull Time
Mastercard
MastercardNYSE: MA: Global payment processing and financial technology service provider.
Technical lead for microservices and authentication/authorization; deep expertise in system design, Java/Spring stack, Oracle/SQL, cloud-native (AWS, Kubernetes), IaC (Terraform, CloudFormation), CI/CD, observability and security.
Core JAVA, Spring Integration, Spring Boot, Hibernate, REST/SOAP web services, Oracle/SQL Databases, AWS, Azure, Kubernetes, Terraform, CloudFormation, Splunk, React, Backstage
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2mo
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Experienced Field Stack Testers (Emissions Testers)
Arvada or Denver or Anchorage or Atlanta or Bakersfield or Baton Rouge or Birmingham or Boston or Cedar Rapids or Charlotte or Cypress or Dallas or Decatur or Denver or Evansville or Houston or Jacksonville or Kansas City or Little Rock or Minneapolis or Vancouver or Philadelphia or Phoenix or Pittsburgh or Roanoke or Salt Lake City or St. Louis or Syracuse or Tampa
$50k-$100k/yr OnsiteFull Time
Alliance Technical Group
Alliance Technical Group: Provides environmental testing, monitoring, and compliance services for industries.
Experience leading emissions testing projects; knowledge of instrumental/wet chemistry; able to travel and work 40+ hrs; valid driver’s license.
Water/wet chemistry equipment, Instrumental sampling tools, Calibration tools
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