136 api developer jobs at 73 companies in St. Louis, MO
Engineer III - API Office
Tempe or St. Louis
HybridFull Time
5+ YOERequires 5+ years developing scalable applications, APIs, integrations, and web services; proficiency with Java, Spring Boot, Python, Node.js, Docker, Kubernetes, Azure, OAS, OAuth 2.0, OpenID Connect, and CI/CD.
Java, Spring Boot, Python, Node.js, Docker, Kubernetes, Microsoft Azure, OpenAPI Specification (OAS), OAuth 2.0, OpenID Connect, GitHub Actions, Rust, MuleSoft Anypoint Platform
API Engineer
Scott Air Force Base, Illinois, United States
$87k-$198k/yr OnsiteFull Time
Experience designing and operating scalable API platforms, back-end engineering with Java or Python, DevOps and Kubernetes experience, familiarity with cloud providers, ability to obtain Security+ and hold Secret clearance.
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
Senior UI/UX & API Developer
Belleville, Illinois, United States
HybridFull Time
8+ YOE8+ years software development experience; strong JavaScript/TypeScript, HTML, CSS, React/Angular; RESTful APIs with Java/C#/Python; SQL; Git/CI/CD; Section 508; Bachelor's/Master's in CS or related or FITSP-D/GCSA/GISF/SSCP; active Secret clearance; U.S. person.
JavaScript, TypeScript, HTML, CSS, React, Angular, Java, C#, Python, OpenAPI, Swagger, SQL, Git, GitLab, Figma, Adobe XD, Sketch, Apache Superset, Oracle, PostgreSQL, Amazon Aurora, Amazon RDS, AWS
Principal Systems Engineer - Enterprise API Platform & GraphQL Engineering
Hopkins or Denver or Atlanta or Chicago or Saint Paul or Earth City or Charlotte or Cincinnati or Gresham or Irving or Brookfield +1 more
$120k-$141k/yr HybridFull Time
7+ YOEBachelor's degree or equivalent; 7+ years IT experience; 7+ years technology infrastructure design/development/support; experience with Apigee, Apollo GraphQL, Kubernetes, Azure, GitLab CI/CD, Ansible, Python, Bash; must work from U.S. Bank location 3+ days/week.
Apigee OPDK, Apigee Hybrid, Apollo GraphQL, Apollo Federation, Apollo Router, OAuth 2.0, JWT, mTLS, GitLab CI/CD, Kubernetes, Helm, Ansible, Infrastructure as Code, Azure, Python, Bash, Datadog
Mulesoft Developer
Albany or Arlington or Atlanta or Austin or Beaverton or Bentonville or Boston or Carmel or Charlotte or Chicago or Cincinnati or Cleveland or Columbus or Culver City or Denver or Des Moines or Detroit or Hartford or Houston or Irving or Kirkland or Miami or Milwaukee or Minneapolis or Morristown or Mountain View or Nashville or New York City or Oklahoma City or Overland Park or Philadelphia or Pittsburgh or Raleigh or Redmond or Sacramento or San Diego or San Francisco or Scottsdale or Seattle or St. Louis or St. Petersburg or Walnut Creek or United States +1 more
$54k-$196k/yr OnsiteFull Time
3+ YOERequires 3+ years software development, 2+ years API development and Git/Agile/testing, 1+ year MuleSoft development, MuleSoft Developer Level 1, and a bachelor's degree or equivalent experience.
Anypoint Platform, Anypoint Studio, Mule Runtime, DataWeave, MUnit, Git, SOAP, REST, XML, JSON, YAML, Anypoint MQ, API Manager, Anypoint Exchange, CloudHub, Salesforce, SAP, Workday, Oracle Cloud Applications, ServiceNow, CI/CD, AWS, Azure, Flex Gateway, Model Context Protocol (MCP), GenAI, HL7, FHIR, Boomi, Informatica, SnapLogic, Workato
Salesforce Developer
Grand Junction or Mooresville or Wildwood or Santa Rosa or Fontana or Elgin or Del Rio or Green Bay or Tannersville or Katy or Irving or Norcross or Kettleman City or Westfield or Lakeville or Justin or Byhalia or Benicia or Phoenixville or Milton or Kernersville or Mesa or Marysville or Brooklyn or Kenosha or Edinburgh or Mansfield or McDonough or Irwindale or Lafayette or Warren or Wytheville or Elm City or Watertown or Riviera Beach or Webster or Walpole or Wilmington or Winchester or Wichita or Wichita Falls or Fishersville or Rothschild or Waco or Vernal or Las Vegas or Vidalia or Tyler or Texarkana or Twin Falls or High Point or Traverse City or Tucson or Tupelo or Tulsa or Tampa or Topeka or Walbridge or Tomah or Sylvester or Geddes or Sioux Falls or South Windsor or Saint Charles or Lathrop or Savannah or Springfield or Edison or Spokane Valley or San Antonio or Santa Maria or Salinas or St. Louis or West Valley City or Saint Joseph or San Jose or Sidney or Shreveport or Houston or Sacred Heart or Saint George or Bridgeville or Oakland or Seattle or San Diego or Pittston or University Park or South Bend or Bradenton or Salina or Saginaw or West Sacramento or Bloomington or Rock Springs or Box Elder or Henrietta or Roanoke or Lockwood or Rock Island or Richmond or Reading or Richfield or Rockford or Cumberland or Price or Portland or Pompano Beach or Parkersburg or Eighty Four or Tolleson or Pennsauken or Pensacola or Portland or Pasco or Parsons or Paducah or Oxnard or Neenah or Orlando or Orange or Otay Mesa or Omaha or Olympia or Oklahoma City or Farr West or Odessa or Ocala or Chesapeake or La Vergne or New Orleans or Conroe or Milford or Pendergrass or Middletown or New Castle or Milwaukee or Shoreview or Missoula or White Pine or Mobile or Bristow or West Monroe or Medley or Montgomery or Montgomery or Memphis or Central Point or Macon or Windsor or Ridgeway or Mason City or Lynchburg or Peru or Laredo or North Little Rock or Louisville or Lufkin or Lakeland or Bethpage or Carson or Carencro or Lexington or Lubbock or Montebello or Lansing or Knoxville or Kings Mountain or Kalamazoo or Bonner Springs or Kalispell or Richland or Jackson or Jersey City or Jonesboro or Jacksonville or Indianapolis or Blackfoot or Huntsville or Conover or Hagerstown or Honolulu or Carlisle or Duncan or Kentwood or Great Bend or Great Falls or Grand Island or Greensboro or Garland or Fort Worth or Fort Wayne or Fort Smith or Fresno or Farmington or Fort Myers or Florence or Flagstaff or Fayetteville or Fargo or Evansville or Erie or El Paso or Elko or Esko or Ankeny or Morrisville or Dothan or Troy or Des Plaines or Commerce City or Decatur or Dayton or Dallas or Crest Hill or Coburg or Wando or Dunbar or Corpus Christi or Casper or Thomasville or Colorado Springs or West Columbia or Columbus or Charlotte or Cleveland or Cookeville or West Chester or Chico or Cheyenne or Forest View or Ringgold or Cedar Rapids or Columbia or LaGrange or Canton or Bowling Green or Milton or Butte or Tonawanda or Baton Rouge or Boonton or La Feria or Dracut or Boise or Redmond or Beaumont or Billings or Bismarck or Birmingham or Bakersfield or Brownsburg or Curtis Bay or Austin or Augusta or Lithia Springs or Cartersville or Conley or Arden or Romulus or Anaheim or Amarillo or Duncansville or Bethlehem or Glenville or Afton or Albuquerque or Abilene
$109k-$136k/yr OnsiteFull Time
4+ YOERequires 4+ years of Salesforce development, 2+ years of Tableau dashboard development, Apex, Salesforce architecture and API, integrations, SQL, version control, and Tableau Desktop and Server/Cloud experience.
Salesforce, Tableau, Apex, Visualforce, Tableau Server, Tableau Cloud, GitHub, SQL
Lead Developer
United States or St. Louis
$123k-$154k/yr RemoteFull Time
10+ YOEBachelor's or master's degree preferred, or equivalent experience; 10+ years in application development. Requires JavaScript, Node.js, Vue.js, Java, Spring Boot, Python, RESTful APIs, Oracle, MongoDB, CI/CD, and AI coding tools.
JavaScript, Node.js, Vue.js, Java, Spring Boot, Python, RESTful API, Oracle, MongoDB, Solr, Kafka, Splunk, Prometheus, Grafana, Oracle E-Business Suite (EBS), Claude, Devin, GitHub Copilot
Software Developer 2-3 (Associate/Mid-Level)
Maryland Heights or Hazelwood
HybridFull Time
3+ YOEBachelor's degree in engineering, computer science, or similar; 3+ years of software development experience with .NET, C#, Visual Studio, SQL, Windows, or Web APIs; Secret clearance eligibility required.
.NET, C#, Visual Studio, SQL, Windows, Web APIs, Agile, Object-oriented programming (OOP), Software Development Life Cycle (SDLC), Microsoft 401K
Sr Developer (St. Louis)
Edwardsville or Granite City or Scott Air Force Base or Scott Air Force Base or St. Louis or Missouri
$106k-$133k/yr RemoteFull Time
5+ YOEBachelor's, master's, or MBA in computer science/programming, or 5+ years related experience. Requires JavaScript, Node.js, Python, Vue.js, TypeScript, HTML/CSS, APIs, databases, testing, and AI-assisted development experience.
JavaScript, Node.js, Python, Vue.js, TypeScript, HTML, CSS, REST, GraphQL, Oracle, MongoDB, PostgreSQL, Java, Spring Boot, Docker, Kubernetes, OpenShift, AI, LLM, retrieval-augmented generation (RAG), MCP
RPA Developer II
Fenton, Missouri, United States
HybridFull Time
2+ YOE2+ years proficient in Web Services and APIs integration; working knowledge of databases (e.g., SQL) and Excel automation; experience with version control systems (e.g., Git, TFS); basic understanding of RPA architecture; bachelor's degree or equivalent work experience.
Web Services, APIs, SQL, Microsoft Excel, Git, TFS, RPA, UiPath Action Center, JSON, .NET, Python
Senior Application Developer
Denver or Springfield or St. Louis or Sterling
$75k-$158k/yr OnsiteFull Time
8+ YOEBachelor's degree in computer science, software engineering, or related field; 8+ years of software development; expert Java or Python; RESTful APIs, databases, CI/CD, Git, TS/SCI clearance, and polygraph eligibility.
Java, Python, RESTful APIs, CI/CD, Git, ArcGIS, GeoServer, OpenLayers, Cesium, Kubernetes, AWS, C2S, SAFe, Esri ArcGIS Pro, Esri ArcGIS Enterprise
Analyst, Web Developer
St. Louis, Missouri, United States
$86k-$103k/yr HybridFull Time
2+ YOE2-4 years front-end web development experience; BS in Computer Science or greater; strong skills in HTML5, JS, CSS, SASS/LESS, SPA frameworks (Vue, React, Angular), Git, AI-assisted tools, and LLM/AI API integration; Agile familiarity.
HTML5, JavaScript, CSS, LESS, SASS, Vue, React, Angular, TypeScript, Git, Claude Code, Codex, GitHub Copilot, Claude, Gemini, ChatGPT, webpack, npm, yarn, Lodash, MomentJS, Mocha, Jest, NodeJS, Express, Jenkins
Business Applications Developer
Granite City, Illinois, United States
$76k-$86k/yr HybridFull Time
3+ YOEBachelor's degree in Computer Science, IT, or related field preferred; 3+ years software development experience preferred; proficiency in C#, .NET, JavaScript, SQL Server; experience with APIs, integrations, SQL queries, stored procedures, Git, and SDLC.
C#, .NET, JavaScript, SQL Server, Git, ERP
Lead Software Engineer
Hazelwood, Missouri, United States
$117k-$176k/yr HybridFull Time
7+ YOEBachelor’s degree in a technical or scientific field and 7+ years of full-stack development experience with Java, modern web frameworks, AWS services, APIs, databases, advanced SQL, and infrastructure as code.
Java, Angular, AWS EC2, Amazon S3, AWS Lambda, Amazon ECS, Amazon EKS, Amazon RDS, Terraform, AWS CDK, AWS CloudFormation, Docker, Kubernetes, PostgreSQL, Oracle, SQL, Python, PyUnit, Selenium, Microsoft Outlook, Microsoft Teams, Microsoft Word, Microsoft Excel
Software Developer (Hiring Event)
Springfield or St. Louis +1 more
$77k-$158k/yr OnsiteFull Time
4+ YOEU.S. citizenship, Top Secret/SCI clearance, polygraph and drug test. Requires 4 years of software development experience or a bachelor's degree in computer science or related field, plus experience with databases, programming languages, APIs, build tools, and agile methodologies.
MySQL, PostgreSQL, Oracle Database, DynamoDB, Java, Python, JavaScript, REST, SOAP, Maven, Gradle, Webpack, NPM, Yarn, Jenkins, Gitlab CI, Kubernetes, Python Flask, Java Spring, Java Spring Boot, JavaScript React, JavaScript Redux
Software Engineer
Maryland Heights, Missouri, United States
$105k-$128k/yr OnsiteFull Time
5+ YOEBachelor's degree or higher; ability to obtain U.S. Secret clearance; 5+ years software development with JavaScript, TypeScript, React, C# or C++; REST APIs; Agile methodologies; Jira or Azure DevOps; unit/integration testing; version control with Git.
JavaScript, TypeScript, React, C#, C++, REST, Jira, Jira Align, Azure DevOps, Git, .NET MAUI
Software Engineer III
Saint Louis, Missouri, United States
OnsiteFull Time
3+ YOERequires 3–6 years with .NET/.NET Core MVC, SQL Server, Azure, full-stack MVC development, REST/RPC APIs, DevOps, Agile, troubleshooting, communication, and a bachelor's degree or equivalent.
.NET, .NET Core MVC, SQL Server, Model-View-Controller (MVC), Azure, REST, RPC, DevOps, Agile, SQL, Microsoft .NET Framework
Software Engineer
Fenton, Missouri, United States +1 more
$98k-$118k/yr OnsiteFull Time
Strong Java and Spring Boot experience; hands-on GCP including Cloud Run, BigQuery, Cloud Storage, Terraform; Docker, Kubernetes, microservices, API design, serverless; CI/CD with Maven and GitLab; relational and NoSQL databases; AI-assisted development tools.
Java, Spring Boot, Google Cloud Platform, Cloud Run, BigQuery, Cloud Storage, Terraform, Docker, Kubernetes, Maven, GitLab, Oracle, MongoDB, TypeScript, Node.js
Lead AI Developer
St. Louis, Missouri, United States
$70-$75/hr HybridContract
7+ YOE7+ years software development, 2+ years Generative AI/LLM experience, Python/Java, LLM platforms (OpenAI, Azure OpenAI, Anthropic, Gemini), frameworks (LangChain, LangGraph, Semantic Kernel, LlamaIndex), RAG, vector databases, REST APIs, cloud (Azure, AWS, GCP), Docker, Kubernetes, CI/CD, Git, SQL/NoSQL.
Python, Java, OpenAI, Azure OpenAI, Anthropic, Gemini, LangChain, LangGraph, Semantic Kernel, LlamaIndex, FastAPI, Flask, Spring Boot, Azure, AWS, Google Cloud, Docker, Kubernetes, Git, SQL, NoSQL, Pinecone, FAISS, ChromaDB, Weaviate
Senior Software Engineer
O'Fallon, Missouri, United States
$115k-$184k/yr OnsiteFull Time
Strong hands-on experience with Java, Spring Boot, Kafka, REST APIs, JPA, and distributed systems; experience with microservices, cloud-native applications, CI/CD, automated testing, performance engineering, secure software development, and Agile Scrum.
Java, Spring Boot, Kafka, REST APIs, JPA, CI/CD
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