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7 principal software engineer jobs at 7 companies in Ballwin, MO

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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
2mo
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Principal Software Engineer
Atlanta or Boston or Morristown or Plano or St. Louis or St. Petersburg or Hyderabad
HybridFull Time
Zelis
Zelis: Providing healthcare payment and claims cost management solutions.
8+ YOE8+ years backend software engineering; degree or equivalent; cloud, IaC, CI/CD; APIs; strong communication; leadership.
TypeScript, Node.js, PostgreSQL, Angular, AWS, Terraform, Elasticsearch, CI/CD, SASS
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3mo
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Principal Software Engineer-Agentic AI
St Louis or Houston or Raleigh
$115k-$192k/yr OnsiteFull Time
RELX
RELXLondon Stock Exchange: REL: Provides information-based analytics and decision tools for professional customers.
Agentic AI systems, LLMs, orchestration (LangChain/OpenAI), tool-augmented agents, prompt engineering, AI governance, scalable architectures.
LangChain, OpenAI APIs, vector databases, embeddings
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3mo
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Principal Software Engineer-Agentic AI
St Louis or Houston or Raleigh
$115k-$192k/yr OnsiteFull Time
Elsevier
ElsevierLondon Stock Exchange: REL: Provides scientific, technical, and medical research information and analytics.
Agentic AI design and integration, LLMs, orchestration (LangChain/OpenAI), tool-augmented agents, prompt engineering, AI governance, and scalable, reliable AI architectures.
LangChain, OpenAI APIs, LLMs, vector databases, retrieval systems, memory systems, RAG, function calling, prompt engineering
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1w
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Principal Engineer - Systems
St. Louis, Missouri, United States
RemoteFull Time
Enterprise Mobility
Enterprise Mobility: Provider of vehicle rental and diverse mobility solutions.
11+ YOE11+ years software and infrastructure engineering experience, expertise in cloud (Azure), security (MFA, SSO, MIM, OTP), distributed systems, and strong stakeholder communication and mentoring skills.
Microsoft Active Directory, Microsoft Entra, AppSec, MFA, SSO, MIM, OTP, Azure
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2w
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Principal Engineer, Engineering Productivity
Ontario or Santa Clara or St. Louis or Bengaluru or London or Paris or Melbourne or Taipei or Tokyo
OnsiteFull Time
Netskope
NetskopeNASDAQ: NTSK: Cloud-native cybersecurity and data protection platform for enterprises.
15+ YOE15+ years software engineering experience building CI/CD platforms; expertise with Python, GoLang, Terraform, Helm, Drone/GitHub Actions, AWS, Kubernetes, Docker; BSCS required, MSCS preferred; on-call participation and leadership/mentoring experience.
Python, GoLang, Java Spring, Terraform, Helm, Drone, GitHub Actions, Spinnaker, AWS, Kubernetes, Docker
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2mo
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Principal Roadway Engineer
Saint Louis, Missouri, United States
$104k-$181k/yr OnsiteFull Time
Parsons
ParsonsNYSE: PSN: Provides engineering and technology services for infrastructure and defense.
10+ YOE10+ years in civil/roadway engineering; PE; State DOT project experience; supervisory ability; strong communication; proficient with engineering software.
Engineering software
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2mo
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Principal Software Engineer, Senior Architect
Purchase or O'Fallon or New York City
OnsiteFull Time
Mastercard
MastercardNYSE: MA: Global payment processing and financial technology service provider.
10+ YOESenior Principal Architect with enterprise-scale data architecture, cloud, SaaS integrations; strong leadership; Java, REST APIs, Kubernetes, AWS/Azure; Bachelor's in CS or Engineering.
Java, REST APIs, Middleware, AWS, Azure, Databricks, Docker, Kubernetes, Cloudera, Spark
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