135 api engineer jobs at 69 companies in Ballwin, MO

PromotedHiringCafe
Founding Backend / Infra Engineer
Cupertino, CA, US
$160k-$300k/yr On-SiteFull Time
HiringCafe
HiringCafe: Building a 100× better job search engine to take on Indeed and LinkedIn.
Own the crawlers, pipelines, and infrastructure powering a real-time job search engine. Strong Node.js and Python fundamentals; bonus points for security and reverse-engineering chops.
Node.js, Python, Elasticsearch, Redis
1mo
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API Engineer
Scott Air Force Base, Illinois, United States
$87k-$198k/yr HybridFull Time
Booz Allen Hamilton
Booz Allen HamiltonNYSE: BAH: Consulting and technology services for government and commercial clients
Experienced backend/platform engineer designing, deploying, and operating enterprise API platforms; Java or Python; Docker, Helm, Kubernetes, GitOps; API gateways and cloud (AWS/Azure/GCP); Secret clearance; HS diploma or GED.
Java, Python, Apigee, Gravitee, Kong, AWS API Gateway, Mulesoft, Docker, Helm, Kubernetes, GitOps, HTTP, gRPC, WebSockets, AWS, Azure, GCP, Git, Jenkins, JIRA, Confluence, Nexus, Bitbucket, SQL, Node.js, Groovy, Scala, Spring Cloud, Spring Core, Spring Boot, Spring Data, Kafka, RabbitMQ
1mo
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API Engineer
Scott AFB, Illinois, United States
$87k-$198k/yr OnsiteFull Time
Booz Allen Hamilton
Booz Allen HamiltonNYSE: BAH: Provides technology and management consulting services to diverse organizations.
Backend/platform engineering with Java or Python, experience operating API gateways (Apigee, Kong, Mulesoft, AWS API Gateway), DevOps (Docker, Helm, Kubernetes, GitOps), cloud (AWS/Azure/GCP), Git/Jenkins/JIRA, and eligible for Secret clearance; HS diploma/GED required.
Java, Python, Apigee, Gravitee, Kong, AWS API Gateway, Mulesoft, Docker, Helm, Kubernetes, GitOps, HTTP, gRPC, WebSockets, AWS, Azure, GCP, Git, Jenkins, JIRA, Confluence, Nexus, Bitbucket, SQL, Node.js, Groovy, Scala, Spring Cloud, Spring Core, Spring Boot, Spring Data, Kafka, RabbitMQ
2mo
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Checkmate API Developer
Clayton or Kansas City or United States
RemoteFull Time
Husch Blackwell
Husch Blackwell: A nationwide firm providing industry-focused legal and litigation services.
2+ YOEMaster's in CS/Information Systems required; 2+ years software development experience. Must have .NET/.NET Core, C#, SQL Server, Entity Framework Code First, REST/JSON, Azure Function Apps, Microsoft Azure Web/Api/Logic Apps, ETL, unit testing, and Power BI experience.
.NET, .NET Core, C#, SQL Server, Entity Framework Code First, REST API, JSON, ETL, Azure Function Apps, Microsoft Azure Web Apps, Microsoft Azure Api Apps, Microsoft Azure Logic Apps, Microsoft Power BI
1w
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API Engineer, Mid-Level
United States or Belleville
$100k-$150k/yr RemoteFull Time
MSM Technology
MSM Technology: Provides specialized IT infrastructure and cybersecurity services to federal agencies.
3+ YOEUS citizen with Secret clearance, HS diploma/GED, CompTIA Security+ and DOD 8570 IAT Level II, 3+ years backend/platform engineering with Java or Python, API platform and DevOps experience, and quarterly travel to Scott AFB.
Apigee, Gravitee, Kong, AWS API Gateway, Mulesoft, Docker, Helm, Kubernetes, GitOps, HTTP, gRPC, WebSockets, ZTNA, SDP, Java, Python, AWS, Azure, GCP, Git, Jenkins, JIRA, Confluence, Nexus, Bitbucket, Kafka, RabbitMQ, Node.js, Groovy, Scala, Spring Cloud, Spring Core, Spring-Boot, Spring Data
1d
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Engineer III - API Office
Tempe or St. Louis
HybridFull Time
Edward Jones
Edward Jones: Offers investment management and financial planning through local branches.
5+ YOE5+ years building scalable APIs and integrations; proficiency with Java, Spring Boot, Python, Node.js, Docker, Kubernetes, Azure; experience with OpenAPI, OAuth2/OpenID Connect, GitHub Actions; strong API design and security skills.
Java, Spring Boot, Python, Node.js, Docker, Kubernetes, Microsoft Azure, OpenAPI Specification (OAS), OAuth 2.0, OpenID Connect, GitHub Actions, Rust, MuleSoft Anypoint Platform
1mo
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Sr Software Developer - API Integration
Creve Coeur or St. Louis
$110k-$130k/yr HybridFull Time
First Bank
First Bank: A family-owned bank providing financial solutions to businesses and individuals.
5+ YOE5+ years software development experience; hands-on Power Apps/Power Automate and Power Platform, REST/JSON API integration, Microsoft Azure, CI/CD and DevOps, Dataverse, Infrastructure as Code, and data mapping; knowledge of data privacy.
Microsoft Power Platform, Power Apps, Power Automate, Dataverse, Microsoft Azure, RESTful APIs, JSON, CI/CD, DevOps, Infrastructure as Code, ServiceNow, RPA, Microsoft SharePoint
3w
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Senior Software Engineer - ServiceNow/Javascript/API
St. Louis or Brentwood or Richmond Heights or Clayton or Maplewood
HybridFull Time
Enterprise Mobility
Enterprise Mobility: Provider of vehicle rental and diverse mobility solutions.
3+ YOE3+ years software development, 2+ years ServiceNow and JavaScript experience, API scripting (REST/SOAP), shell scripting (SSH/PowerShell), US work authorization, reside in St. Louis area, security-minded.
ServiceNow, JavaScript, REST, SOAP, SSH, PowerShell, Agile, Scrum
2w
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MES Engineer
Kalamazoo or Pittsburgh or St. Louis
$80k-$120k/yr HybridFull Time
GrayMatter
GrayMatter: Industrial technology solutions and automation engineering services.
4+ YOEBachelor's in engineering preferred, 4+ years MES experience, SQL and REST API experience, proficiency with VBA/Python/Java Script, strong attention to detail, problem solving, and customer service; willingness to travel.
VBA, Python, Java Script, TrackSYS, Plant Applications, Sepasoft, Production Center, SQL, REST API, Velotic (GE) Proficy Plant Applications, Microsoft Office, TCP/IP
1mo
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Sr. Engineer - Oil & Gas
Lisle or St. Louis or Charlotte or Indianapolis or Greenwood Village
HybridFull Time
Farnsworth Group
Farnsworth Group: A national architectural, engineering, and surveying firm providing multidisciplinary project services and client-focused solutions.
5+ YOEBS in engineering (ABET), 5-15 years oil/gas engineering experience, 3+ years project management, knowledge of DOT/API/ANSI/ASME standards, Microsoft Word/Excel/PowerPoint/Project proficiency, valid driver’s license, willing to travel.
Microsoft Word, Microsoft Excel, Microsoft PowerPoint, Microsoft Project
1mo
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Senior Solutions Engineer
Arlington or Atlanta or Austin or Boston or Charlotte or Chicago or Dallas or Houston or Indianapolis or Kansas City or Minneapolis or New York or Philadelphia or St Louis
$168k-$252k/yr RemoteFull Time
Amplitude
AmplitudeNasdaq: AMPL: Develops digital analytics software for tracking customer product behavior.
5+ YOE5+ years in software pre-sales; hands-on SQL, Python or R, and APIs; experience closing enterprise technical evaluations; comfortable presenting to engineers and executives.
Amplitude, Python, SQL, APIs, R, Google Analytics 4, Adobe Analytics, Mixpanel, Tableau, Looker, Microsoft Power BI
8h
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Data Engineer
St Louis, Missouri, United States
HybridFull Time
Build-A-Bear
Build-A-BearNYSE: BBW: Sells customizable stuffed animals and provides interactive retail experiences.
5+ YOE5+ years data engineering experience, bachelor’s in CS/IS/data engineering, skilled in SQL, Python, Spark, cloud data platforms (Microsoft Azure), ETL/ELT design, API integrations, and data modeling.
SQL, Python, Spark, Microsoft Azure, Data Factory, Synapse, Databricks, Data Lake, Power PI, Tableau, Looker, Microsoft Dynamics 365, Salesforce
3mo
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AI Engineer
O Fallon, Missouri, United States
OnsiteFull Time
Automotive Product Consultants
Automotive Product Consultants: Provides sales, finance, and insurance services to automotive dealerships.
2+ YOEBachelor's in CS/Data Science/AI or related; 2+ years AI/ML; Python; TensorFlow/PyTorch/scikit-learn; SQL; APIs; problem solving.
Python, TensorFlow, PyTorch, scikit-learn, SQL, Pandas, APIs, Cloud
3w
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Sales Engineer - Mid-West US (Minnesota)
Minnesota or Wisconsin or St. Louis
RemoteFull Time
BlinkOps
BlinkOps: Agentic security automation platform for enterprise workflows.
3+ YOE3+ years in sales/solutions engineering for cybersecurity; strong security operations knowledge; hands-on with APIs, JSON, YAML, jq; experience with SIEM, SOAR, EDR, IAM, cloud services; demo and POC execution skills.
APIs, JSON, YAML, jq, SIEM, SOAR, EDR, IAM, GRC, AWS, Azure, GCP, Blink UI
3w
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Senior Developer
Sunset Hills, Missouri, United States
RemoteFull Time
Grimco
Grimco: Manufacturer and distributor of signs and sign-making supplies.
5+ YOE5+ years professional software development, strong SQL and relational DB skills, experience building system integrations (APIs/EDI), ability to work with legacy code, clear communication, and security awareness.
SQL, RPG, IBM i, IBM Power Systems, EDI, X12, REST, JSON, APIs, ERP, Microsoft Azure, AWS
3mo
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Software Engineer II
O'Fallon, Missouri, United States
$92k-$147k/yr OnsiteFull Time
Mastercard
MastercardNYSE: MA: Global payment processing and financial technology service provider.
Experience building applications with Power Apps; strong JS/HTML, API integrations, SQL, and Azure knowledge.
Power Apps, Power Automate, Dataverse, SharePoint, Excel, SQL, APIs, JavaScript, HTML, Azure, Git
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
9h
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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
2mo
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Forward Deployment AI Engineer
Denver or St. Louis or Indianapolis
$120k-$150k/yr FieldFull Time
Lyra Technology Group
Lyra Technology Group: Operates a global portfolio of managed IT service providers.
2+ YOEBachelor's degree,2+ years software/AI engineering or technical consulting,proficiency in Python and REST APIs,experience with LLM APIs (OpenAI, Anthropic, Gemini),knowledge of RAG and agent patterns,strong communication.
Python, REST APIs, LangChain, LangGraph, AutoGen, OpenAI, Anthropic, Gemini, Zapier, Make, n8n, Pinecone, Weaviate, Chroma
1w
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Solutions Engineer
Indiana or Ohio or Santa Clara or St. Louis or Bangalore or London or Paris or Melbourne or Taipei or Tokyo
$144k-$205k/yr FieldFull Time
Netskope
NetskopeNASDAQ: NTSK: Cloud-native cybersecurity and data protection platform for enterprises.
5+ YOE5+ years as a solutions/system engineer, strong presentation and communication skills, hands-on experience with Linux/MacOS/Windows, cloud platforms, identity and security integrations, and customer-facing sales experience.
Linux, MacOS, Windows, Android, iOS, HSM, SAML, SCIM, SIEM, SOAR, EDR, SD-WAN, Active Directory, ADFS, Azure AD, AWS, Azure, GCP, Python, REST API, Bluecoat, Symantec, McAfee, Checkpoint, Cisco, Juniper
1mo
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Engineer, Data Integration - Archimedes
St. Louis or Brentwood or Alaska or Arizona or Arkansas or California or Connecticut or Delaware or Hawaii or Idaho or Louisiana or Maine or Massachusetts or Michigan or Mississippi or Montana or Nebraska or Nevada or New Mexico or New York or North Carolina or North Dakota or Oregon or Rhode Island or South Carolina or South Dakota or Texas or Utah or Vermont or Washington or West Virginia or Wyoming or United States
HybridFull Time
Navitus Health Solutions
Navitus Health Solutions: Transparent pharmacy benefit management and specialty pharmacy provider.
5+ YOEBachelor's in CS/IS/Data Engineering required, 5+ years integration engineering experience, Azure/Databricks experience preferred, API/event-driven architecture expertise, CI/CD and compliance (HIPAA/HITRUST/SOC 2) knowledge.
Azure Event Hub, Event Grid, Service Bus, Kafka, Azure Databricks, Azure Data Lake Storage Gen2, Azure Functions, Logic Apps, Azure API Management, Power Automate, Azure Data Factory (ADF), Azure Key Vault, Azure DevOps, GitHub Actions, Azure Monitor, Application Insights, Log Analytics, KQL, REST APIs, GraphQL, SOAP, Webhooks, OAuth 2.0, OpenID Connect, OpenAPI/Swagger, Python, C#, PowerShell, Bash, SQL, JSON, XML, YAML, Git