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- ...Senior Java Backend Developer O'Fallon, Missouri [Onsite] Job Description: ~6+ years of experience in backend development using... ...Java. ~ Strong expertise in Core Java, Spring Boot, and REST APIs. ~ Hands-on experience with Kafka / event streaming platforms...Suggested
E-Solutions
O Fallon, MO3 days ago $115k - $184k
...Remote Payment and Presentment System) platform team. This team develops and supports critical software solutions that enable payment processing... ...who enjoys building modern applications, designing scalable APIs, solving complex technical problems, and contributing to high-...SuggestedFull timePart timeRemote workWorldwideFlexible hoursMasterCard
O Fallon, MO4 days ago- ...dependencies. All About You Successfully designed and developed externally facing web applications utilizing modern single page... .... Successfully designed and developed cloud ready REST APIs utilizing industry best practices. Good understanding of Cloud...SuggestedLocal area
Samprasoft
O Fallon, MO2 days ago - ...'Scale @ Speed' as our guiding principle. Title- Full Stack Developer Location- St. Louis, MO Mode of Interview- (L1 -Video and... ...opportunities. Technologies: - Java, J2EE, micro services, RESTful APIs, Angular, Web Services, JavaScript, Docker Framework -...Suggested
Yantran LLC
O Fallon, MO17 hours agonew - ...technologies. This is a highly technical role ideal for senior developers or leads passionate about solving complex problems in a fast-paced... ...applications and services. Create and manage RESTful APIs and microservices architectures. Collaborate with DevOps...SuggestedFull timeLocal area
Veracity
O Fallon, MO2 hours agonew - ...and best practices . Demonstrated experience designing and developing Java-based web services using both relational and non-... ...development and architecture Spring Framework RESTful APIs and JSON Responsive web application development Cloud...Suggested
Info Way Solutions
O Fallon, MO1 day ago $140k - $231k
...the architecture and design of microservices responsible for both API and web authentication authorizations. This role requires deep... ...modular design, and maintainability • Build and enhance internal developer platforms using Backstage or similar frameworks, leveraging...SuggestedFull timePart timeWorldwideFlexible hoursMasterCard
O Fallon, MO4 days ago- ...dependencies. All About You: Successfully designed and developed externally facing web applications utilizing modern single page... .... Successfully designed and developed cloud ready REST APIs utilizing industry best practices. Deep understanding of Cloud...SuggestedH1bLocal areaRelocation
Samprasoft
O Fallon, MO2 days ago - ...software engineering experience. - 3+ years leading large-scale distributed system initiatives. - Expert-level Java, Spring Boot, REST APIs, microservices architecture, and distributed systems expertise. - Strong software architecture and software design leadership...Suggested
Dynamic Yield
O Fallon, MO4 days ago - ...Program Overview: Sustainability and Innovations Program aims to develop Mastercard sustainability solutions and innovative products for... ...organization skills. Key Technology Focus Areas: Java, REST API, Pivotal Cloud Foundry, Jenkins, Spring, Oracle (or any other...SuggestedLocal area
Samprasoft
O Fallon, MO2 days ago - ...Roles And Responsibilities: Ideally full stack experienced developer with strong/expert level Java development/architecture... ...retrospectives/elaboration sessions. Solid experience with RESTful APIs and JSON/SOAP based API with Java. Experience in web technologies...SuggestedWork experience placement
Keylent Inc
O Fallon, MO1 day ago $92k - $147k
...customers. We’re looking for talented software development engineers to develop advanced technologies and applications that are revolutionizing... ...of Java, Spring Boot, Spring Batch, Hibernate, and REST API services. • Strong knowledge of Linux and shell scripting. • Experience...SuggestedFull timePart timeWorldwideFlexible hoursMasterCard
O Fallon, MO3 days ago$45k - $121k
...Job Title: Software Developer City: O Fallon State/Province: Missouri Posting Start Date: 8/7/26 Wipro... ...should have hands-on expertise in Java, Spring Boot, REST APIs, Angular, Node.js, Microservices Architecture, Cloud Platforms,...SuggestedMinimum wageLocal areaWipro
O Fallon, MO3 days ago- ...Required Experience: You have experience building applications using Java and PCF You have extensive experience with Java APIs Some experience with web technologies, including HTML, Javascript and front-end frameworks such as Angular Optimizing applications...Suggested
Yantran LLC
O Fallon, MO4 days ago - ...Experience in working with fast paced, modern Architecture with extensive experience with building Spring boot applications, REST API's, NO/SQL data bases and actively participate in R&D on the new frameworks • Strong communication skills, with an ability to express...SuggestedWork experience placementInternshipLocal area
Diverse Lynx
O Fallon, MO3 days ago - ...Technical solution & application architecture & design Development, review & ownership of architecture & design artifacts (SAD, API Specification etc.) Actively find ways (new technologies, tools, frameworks) to improve software solutions Establish design, architecture...Local area
Zortech Solutions
O Fallon, MO1 day ago - ...Java Lead Experience Required - 6+ Years Must Have Technical/Functional Skills Object-oriented Programming Web services & API standards (REST/OAuth/JSON) Programming & Scripting Languages (2 or more of Java, C++, Scala, JS, Python, Shell*) Spring,...
ClifyX
O Fallon, MO2 days ago $122k - $207k
...Authorization LDAP, Active Directory Services, Access Provisioning Controls, Audit, and Compliance frameworks SOAP and REST APIs and integration patterns All About You You are strategic yet hands‑on, able to zoom out to enterprise impact and zoom in to code...Full timePart timeWorldwideFlexible hoursShift workMasterCard
O Fallon, MO4 days ago$63 - $90 per hour
...Partners is currently seeking a talented Senior .NET Full-Stack Developer. Do you have experience building large-scale distributed... ...with Entity Framework, Dependency Injection, and cloud-hosted APIs. Experience with AWS services: Lambda, S3, SQS, SNS, Kafka, Step...- ...An employer is looking for an experienced SQL developer to join their team for a specific project. This person will work alongside the team... ..., Missouri Nice to Have Skills & Experience API development AWS experience AI experience Benefit...
Insight Global
Maryland Heights, MO4 days ago $86.36k - $101.6k
...principles.Essential Responsibilities:- Responsible for designing, developing, testing, operating and maintaining products- Takes full stack... ....Proficiency in GraphQL, Apollo Client, Redux, Context API, Axios, and state management frameworks.Advanced knowledge of HTML...Full timeWork experience placementLocal area3 days per week$98.18k - $115.5k
...principles.Essential Responsibilities:- Responsible for designing, developing, testing, operating and maintaining products- Takes full stack... ...applications and business processes.Built and consumed REST APIs, GraphQL services, and microservices architectures using Java,...Full timeWork experience placementLocal area3 days per week$140k - $231k
...complexity assessment • Identify best-of-breed methods / tools / API's and assess technical fit, Development experience in Java... ...Product bundles • Work with business/product owners/BizOps to develop and deliver on new services to introduce new products and bundles...Full timePart timeWorldwideFlexible hoursMasterCard
O Fallon, MO1 day ago- ...deploying and operating distributed applications using Helm charts, developing and maintaining Kubernetes operators where appropriate, and... ...workflows using tools such as GitHub, Jenkins, Codefresh, APIs, and GitOps-based approaches. Experience with Infrastructure...Local area3 days per week
The Timberline Group Company
Maryland Heights, MO20 hours ago - ...fraudsters across the globe? Interested in creating Thats the stuff! software for combating scammers? The Transaction Security team develops new products for Mastercard's fraud prevention platform. We protect cardholders / card issuers and aim to eradicate credit card...
Samprasoft
O Fallon, MO2 days ago $55 - $58 per hour
...connectivity / firewall requests Implement and enforce server encryption, certifications, and patches Develop and support ETL processes and APIs, integrating various data sources and targets Write and optimize SQL queries for Teradata, MySQL, SQL Server...Contract workLocal areaImmediate startKellyMitchell Group
Maryland Heights, MO20 hours ago$105.4k - $124k
...principles.Essential Responsibilities:Responsible for designing, developing, testing, operating and maintaining productsTakes full stack... ...Cloud, Hibernate/JPAExpert level hands-on experience in RESTful API design and developmentExpert level hands-on experience in Microservices...Full timeWork experience placementLocal area3 days per week$119.77k - $140.9k
...software development lifecycle and DevOps principles.Essential Responsibilities:Design, develop, test, and maintain scalable applications using Java and Spring Boot.Build and support RESTful APIs and microservices-based solutions.Participate in all phases of the Agile Software...Full timeLocal area3 days per week- ...development # Strong background in test automation with a focus on APIs. # Experience with JUnit and/or TestNG and Selenium... ...Space. As part of an exciting, fast paced environment developing payment solutions in the mobile and e-commerce space, this position...Work experience placement
3B Staffing LLC
O Fallon, MO1 day ago $115k - $184k
...continuous retraining workflows to ensure reliable AI delivery. • Develop high-performance Python backend services for LLM inference... ...Excellent Python engineering skills including async programming, API development (FastAPI), and building inference-ready microservices...Full timePart timeWorldwideFlexible hoursMasterCard
O Fallon, MO2 days ago
