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- ...Mastercard in O'Fallon, Missouri is seeking a Software Engineer I to develop, test, and maintain secure, scalable software. You’ll work with... ...into reliable software, writing clean code, and contributing to APIs and microservices while learning architectural principles for...Suggested
MasterCard
O Fallon, IL5 days ago $107.9k - $195.05k
...Candidate We're looking for someone who is more than a front-end developer. You are passionate about how technology feels and functions... ...tooling. Experience developing or consuming RESTful APIs and integrating UI applications with backend services. Experience...SuggestedContract workLocal areaImmediate startLeidos
Fairview Heights, IL1 day ago- ...About the job Front End UI Developer (hybrid-remote) 24 month contract to hire role (hybrid-remote) Role Delivers solutions by providing... ...flexible & reusable. Experience with QlikSense business intelligence API''s. Top required technical skills FrontEndUI Developer -...SuggestedContract workRemote workFlexible hours
Nanosoft Consulting Talent Page
O Fallon, IL5 days ago $87.1k - $157.45k
...networking professional with software development experience looking to develop and expand their abilities and showcase their skills in a fast... ....Python software development experience that includes REST api development, as well as the parsing, generation and validation...SuggestedFull timeContract workLeidos
Shiloh, IL4 days ago- ...A global consulting firm seeks a Senior Application Designer and Developer to support clients in business transformation through technology. You will analyze, design, and deploy robust software applications, working closely with stakeholders to deliver innovative solutions...SuggestedRemote work
EY
Saint Louis, MO15 hours ago - ...Description Remote Our client seeks an API Developer III to design, develop, and maintain APIs and integrations that support a broad digital ecosystem. The role will leverage Microsoft Azure services such as API Management, Application Gateway, and Logic Apps, plus...SuggestedRemote work
Jobrapido
Saint Louis, MO14 hours ago - ...Guidehouse is seeking a data-focused professional in Illinois to support data topics, structures, and API development for the JPE data set. You will assist with data ingestion, dictionary management, and cross-team collaboration in a fast-paced environment. The role requires...Suggested
Guidehouse
Fairview Heights, IL15 hours ago - ...Senior Software Developer - JavaLocation: OFALLON Skill: Spring FrameworkNote: Day 1 onsite role (No remote)Skillsets: Java, Springboot, Microservices, RESTful API, knowledge on CI/CD and AzureKey JD: Will play the role of tech lead, leading and guiding 15-18 member Java...SuggestedRemote work
Keylent Inc
O Fallon, IL12 hours ago $60k - $135k
...operations are safe, repeatable, and auditable. Core responsibilities Develop and maintain Ansible playbooks and orchestration workflows.... ...scripting. Infrastructure as Code, Git-based workflows, and API integration. Experience automating high-risk production maintenance...SuggestedMinimum wageLocal areaWipro
O Fallon, IL5 days ago- ...Roles & Responsibilities Design, develop, and maintain scalable web applications using Angular 15+ and React where applicable. Build reusable... ...UI components. Integrate frontend applications with RESTful APIs and backend services. Implement application state management...Suggested
Veriipro
O Fallon, IL5 days ago $87.1k - $157.45k
...The Digital Sector has a career opportunity for a ServiceNow Developer supporting the Global Solutions Management – Operations II (GSM... ...’s ITSM, OMT, TSM, and TSOM modules. Assists with REST/SOAP APIs, JSON files, and Python scripts Create and maintain Forms, Reports...SuggestedContract workLocal areaImmediate startRemote workLeidos
Scott Air Force Base, IL4 days ago$87.1k - $157.45k
...The Digital Sector has a career opportunity for a ServiceNow Developer supporting the Global Solutions Management – Operations II (GSM-... ...ServiceNow’s ITSM, OMT, TSM, and TSOM modules.Assists with REST/SOAP APIs, JSON files, and Python scriptsCreate and maintain Forms,...SuggestedFull timeContract workLeidos
O Fallon, IL3 days ago$45 - $50 per hour
...Hands-on experience in Python software development, including REST API design and development, as well as JSON parsing, generation,... ...for source code management and collaboration. • Experience developing, deploying, and troubleshooting software applications in Linux...SuggestedInsight Global
Lebanon, IL2 days ago- ...The IT Department is seeking a motivated Software Developer who will be based out of a Missouri office. This position will be part of an... ...ability to integrate with third-party platforms and Web services/APIs.Working with vendors, as necessary, to implement solutions and...SuggestedWork at officeRemote work
TRUE MANUFACTURING GROUP
O Fallon, IL5 days ago - ...fulltime Rate-$50/hr on c2c We are seeking a skilled Software Developer with a strong background in Java, Spring Boot, Microservices, and... ...methodologies and DevOps practices. Familiarity with RESTful APIs and web services. Understanding of database technologies (SQL,...SuggestedFull timeContract work
Diverse Lynx
O Fallon, IL5 days ago $165k - $264k
...observability, and incident response for models, pipelines, and applications. Integrate AI systems with enterprise data platforms, APIs, identity, and security controls. Guide teams on LLM and classical ML patterns (e.g., RAG, evaluation, guardrails); balance low‑code...Full timeFlexible hourslwtsquad
O Fallon, IL5 days ago- ...an Intelligence Community customer. In this role, you'll design, develop, and deliver modern software solutions that enable critical... ...functional development teams to build and maintain microservices, APIs, and web-based applications that support GEOINT data access, visualization...Contract work
Leidos
Saint Louis, MO3 days ago $110k - $140k
...engineering into a next-generation mission platform. The team is developing cloud-based applications, advanced automation, and scalable... ...applications using Docker, Kubernetes, and AWS.Develop RESTful APIs and web interfaces using React, Node.js, Flask, or Spring Boot....Full timeShift workEnnoble First, Inc.
Saint Louis, MO5 days ago- ..., design and development Containerization and/or Orchestration API Development Cloud Native Development, AWS, Azure, Google Cloud... ...imaging technologies.Demonstrated experience working with and developing geospatial information systems (GIS) to include open-source and...Work at officeRemote workFlexible hoursNight shift
Freedom Technology Solutions Group, LLC
Saint Louis, MO5 days ago - ...Backend DeveloperThe Backend Developer will work in a team environment using a variety of technologies for building leading edge solutions... ...processes that keep day to day operations runningWork with various API's to help integrate our systems into additional third-party...Work experience placementRemote work
The Timberline Group Company
Saint Louis, MO14 hours ago $150.24k - $169.15k
...analyzing client requirements, project objectives, and constraints to develop scalable, secure, and effective technical solutions.... ...technologies. Programming and Technical Tools: Experience with APIs and programming languages or technologies such as TypeScript and...Full timeRemote work- Software Developer - Java/C# DirectEmployers is looking for a software engineer with backend development experience. This is a full time... ...resource usage Experience with C#, XML, JSON, XSL, REST APIs, HTML, JavaScript, and AWS Why DE? Remote work Employer...Full timeFor contractorsRemote workFlexible hours
Jobrapido
Saint Louis, MO16 hours ago - ...Retail POS, Xstore developmentExtensive experience in designing and developing applications using JAVA/J2EE.Must have deep understanding of... ...and other SDLC activities.Experience developing and designing API integrations using SOAP/RESTful/JSON.Excellent problem solving,...
E-Solutions
Saint Louis, MO14 hours ago - ...POS, Xstore development Extensive experience in designing and developing applications using JAVA/J2EE.Deep understanding of Object-oriented... ...and other SDLC activities.Experience developing and designing API integrations using SOAP/RESTful/JSON.Excellent problem solving,...
E-Solutions
Saint Louis, MO16 hours ago - ...EY’s SDC Java Software Developer role in St. Louis focuses on designing, building, and delivering distributed software applications within... ...modernize platforms using microservices, cloud-native patterns, and API-driven architectures. You’ll work in a fast-paced, hybrid...
EY
Saint Louis, MO5 days ago $115k - $125k
DescriptionKforce has a client that is seeking a Full Stack Developer in Saint Louis, MO.Overview:Our client is looking for a Software Engineer... ..., integrated, and delivered, using Node.js, JavaScript, APIs, and the Profound.js framework. You will help modernize legacy...KForce
Saint Louis, MO3 days ago- ...'s client's user base. You will work side-by-side with analysts to train and mentor users, test and troubleshoot technical issues, develop new Palantir use cases, all while solving unique and challenging problems. This may take the form of embedding with users across the...Contract workFor contractors
Barbaricum
Shiloh, IL4 days ago - ...management using React Native, TypeScript, Redux, Zustand, and Context API . ✅ Set the Mobile Standard Establish and champion best... ...experience in Swift and/or Kotlin , with the ability to develop custom modules and optimize platform-specific functionality ~...Immediate startRemote work
Top Prospect Group
Saint Louis, MO1 day ago - ...scalable. About the Role We're looking for a Middle Backend Developer to join our engineering team and help build and scale the... ...and receiving constructive feedback. Integrate third-party APIs and internal services reliably and securely. Monitor, debug,...
Jobrapido
Saint Louis, MO5 days ago $170k - $281k
...leader, you will be responsible for defining engineering strategy, developing talent, fostering innovation, and ensuring the successful... ...available systems. Strong knowledge of cloud-native architectures, APIs, microservices, event-driven systems, and platform engineering....Full timePart timeImmediate startWorldwideFlexible hoursMasterCard
O Fallon, IL3 days ago
