C1 - Java Full Stack - Mobile Dev

St. Louis, MO, United States (On-site) Contract (4 months 15 days) Published 11 days ago mongodb root cause analysis Docker & Kubernetes java programming Agile/Scrum methodology microservices architecture sql database spring boot framework CI/CD & DevOps We are looking for a Senior Java Full-Stack Engineer to design, develop, and operate high-throughput microservices. The role demands strong backend expertise with Java 17 and Spring Boot, solid database skills across Oracle, MongoDB, and Redis, and the ability to own services end-to-end from design through production observability. Key Responsibilities: Design and implement microservices with well-defined API contracts and clear service boundaries Build and optimize RESTful APIs consumed by internal teams and external partners Write performant SQL against Oracle DB and design document models in MongoDB Implement caching strategies using Redis to support low-latency, high-throughput reads Ensure production reliability through resilience patterns, structured logging, and distributed tracing Participate in code reviews, design discussions, and sprint ceremonies Maintain 95%+ meaningful test coverage with unit and integration tests Collaborate with DevOps on CI/CD pipelines, containerization, and Kubernetes deployments Required Qualifications: Java 17 — streams, lambdas, records, sealed classes, concurrency APIs, SOLID, thread safety Spring Boot — DI, bean lifecycle, profiles, actuator, Spring MVC, WebClient, Spring Cloud, Spring Security Microservices — service boundaries, resilience patterns, feature toggles, API versioning, sagas, observability Oracle DB — complex SQL, JOINs, window functions, execution plans, indexing, partitioning, batch queries MongoDB — document modeling, aggregation pipelines, indexing, sharding, replica sets, change streams, transactions Redis — data structures, clustering, cache strategies (cache-aside, write-through, TTL), invalidation, hot-key mitigation Data Structures — hash maps, trees, heaps, graphs, complexity analysis, Java Streams on large collections API Design — RESTful semantics, OpenAPI/Swagger, versioning, idempotency, Jackson serialization Testing — JUnit 5, Mockito, integration tests (DB + cache), SonarQube 95%+ coverage, contract testing DevOps — Git workflows, GitLab CI/CD, Docker, Kubernetes (HPA, probes), structured logging, distributed tracing Engineering — Agile/Scrum, root-cause analysis, design trade-offs, Jira Preferred Qualifications (Good-to-Have): UI — Node.js, Express, JWT, Angular 11, TypeScript, RxJS, ag-Grid, Bootstrap, Chart.js Kafka — producers, consumers, partitioning, offset management, event-driven patterns Cloud & Infra — Kubernetes-native, Istio, Harness CD, container registries Additional — Lombok, MapStruct, 12-factor app, vault-based secrets, GraphQL The pay range that the employer in good faith reasonably expects to pay for this position is $30.05/hour - $46.95/hour. Our benefits include medical, dental, vision and retirement benefits. Applications will be accepted on an ongoing basis. Tundra Technical Solutions is among North America’s leading providers of Staffing and Consulting Services. Our success and our clients’ success are built on a foundation of service excellence. We are an equal opportunity employer, and we do not discriminate on the basis of race, religion, color, national origin, sex, sexual orientation, age, veteran status, disability, genetic information, or other applicable legally protected characteristic. Qualified applicants with arrest or conviction records will be considered for employment in accordance with applicable law, including the Los Angeles County Fair Chance Ordinance for Employers and the California Fair Chance Act. Unincorporated LA County workers: we reasonably believe that criminal history may have a direct, adverse and negative relationship with the following job duties, potentially resulting in the withdrawal of a conditional offer of employment: client provided property, including hardware (both of which may include data) entrusted to you from theft, loss or damage; return all portable client computer hardware in your possession (including the data contained therein) upon completion of the assignment, and; maintain the confidentiality of client proprietary, confidential, or non-public information. In addition, job duties require access to secure and protected client information technology systems and related data security obligations.