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Fullstack React/Java Developer

Technology
Interaction24,LLC
Seattle, United States3 weeks agoUntil 11/18/2026

Job description

Location: Need to sit onsite in Seattle, WA (hybrid)

Interview Process: 2 Round - Technical

# of openings: 4

Seniority: x4 or x5 (8-10+ years)

Intake Notes: Will have a formal intake when the SOW is approved this week. This is a pipleine req for now.

Must Haves:

  • It will be 70% React.js
  • Java
  • Kafka
  • NoSQL

We are seeking a talented and experienced Senior Full Stack Developer with a strong emphasis on React.js to join our dynamic team. In this role, you will be responsible for building and maintaining high-performance, scalable applications that power our platform. You will spend approximately 70% of your time working on front-end development using React.js and the remaining 30% on back-end technologies including Java, Kafka, and NoSQL databases.

Key Responsibilities:

  • Front-End Development (70%):

  • Design, develop, and optimize user interfaces using React.js.

  • Collaborate with UI/UX designers to implement responsive and visually appealing web applications.

  • Ensure the technical feasibility of UI/UX designs and optimize applications for maximum speed and scalability.

  • Maintain and improve existing React.js applications with a focus on performance and user experience.

  • Back-End Development (30%):

  • Develop and maintain robust back-end systems using Java.

  • Integrate and manage Kafka for real-time data streaming and event-driven architecture.

  • Work with NoSQL databases to design, develop, and optimize data models that support large-scale applications.

  • Collaborate with DevOps to deploy, monitor, and troubleshoot applications in a cloud environment.

  • Collaboration & Communication:

  • Work closely with cross-functional teams including Product, Design, and DevOps to deliver high-quality software solutions.

  • Participate in code reviews, pair programming, and knowledge-sharing sessions.

  • Contribute to the continuous improvement of development processes and best practices.

Required Skills & Experience:

  • Proven experience in front-end development with React.js (70% focus).

  • Strong proficiency in Java for back-end development.

  • Hands-on experience with Kafka for real-time data processing.

  • Expertise in NoSQL databases (e.g., MongoDB, Cassandra, DynamoDB).

  • Solid understanding of RESTful APIs and microservices architecture.

  • Experience with version control systems (e.g., Git).

  • Familiarity with cloud platforms (e.g., AWS, Azure) is a plus.

  • Excellent problem-solving skills and attention to detail.

  • Strong communication and teamwork abilities.

Education:
  • Bachelors degree in Computer Science, Engineering, or a related field, or equivalent practical experience.

Interested in this role?