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Full Stack Engineer Java / React / Kafka

Hire Tech ServicesSt. Louis, MO🇺🇸United States

Why this role stands out

Accelerate your career as a Full Stack Engineer at Hire Tech Services, where you will leverage cutting-edge technologies like Java 21, Spring Boot 3, and Kafka to build a high-impact Unified Workflow Engine. This role is perfect for a collaborative, tech-savvy professional who thrives in an innovative team environment and is eager to master advanced architectural patterns. Apply today to take the next major step in your engineering journey and contribute to sophisticated, large-scale software solutions.

Quick overview

SeniorityMid Senior
Work modeOn Site
LocationSt. Louis, MO, United States
DockerMicroservicesSpringSpring BootAgileApacheGitHibernateJUnitJavaKafkaKubernetesPostgreSQLRESTReactTypeScript

Job description

Job Title: Full Stack Engineer
Location: Onsite
Duration: Long-Term Contract
Job Type: Contract

Job Description

We are looking for an experienced Full Stack Engineer with strong hands-on experience in Java, Spring Boot, React, TypeScript, Kafka, and PostgreSQL to develop and enhance a modern Unified Workflow Engine platform.

Required Skills

  • 7+ years of software development experience with strong Java expertise.
  • 3+ years of hands-on Java/Spring Boot development.
  • Strong experience with Java 17/21 and Spring Boot 3.x.
  • Strong React + TypeScript development experience.
  • Experience with React Query / TanStack Query.
  • Strong experience building REST APIs using Spring Web / WebFlux.
  • Hands-on experience with Apache Kafka, including producers, consumers, topics and partitions.
  • Understanding of Kafka ordering, idempotency and delivery semantics.
  • Strong PostgreSQL and JPA/Hibernate experience.
  • Experience with Flyway or Liquibase database migrations.
  • Experience implementing OAuth2, service authentication and API security/API keys.
  • Experience with JUnit and integration testing.
  • Experience working with private/scoped npm registries/package management.
  • Experience with shared component libraries/design systems.
  • Experience with Module Federation is highly preferred.
  • Strong Git, CI/CD and Agile development experience.

Responsibilities

  • Design, develop and maintain scalable full-stack applications.
  • Build reusable React/TypeScript UI components and integrate them with backend services.
  • Develop scalable Java/Spring Boot microservices and REST APIs.
  • Design and implement Kafka producers and consumers.
  • Ensure reliable event processing, ordering and idempotency.
  • Work with PostgreSQL and JPA/Hibernate for data persistence.
  • Implement secure authentication and authorization using OAuth2 and related security mechanisms.
  • Develop unit, integration and automated tests.
  • Collaborate with architects, product owners and engineering teams.
  • Participate in code reviews, troubleshooting and production support.
  • Contribute to shared UI libraries and modern frontend architecture.

Preferred Qualifications

  • Experience with enterprise workflow platforms.
  • Experience with microservices and event-driven architecture.
  • Experience with Kubernetes/Docker and cloud environments.
  • Strong communication and problem-solving skills.
  • Ability to work independently in a fast-paced Agile environment.

Interested candidates can send their updated resume along with availability, location and rate.

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