Fullstack Java Developer
NisumUnited States19 hours ago
ContractEngineering, Information Technology
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We are seeking a Full Stack Developer with strong expertise in Java backend development, React.js frontend, and Reactive Programming using Spring WebFlux. The candidate should be capable of building highly scalable, non-blocking, and event-driven applications, owning features end-to-end across UI and backend services.
What You'll Do
Backend (Java & Reactive Stack)
Core Technical Skills:
$130 - $140K per annum
What You'll Do
Backend (Java & Reactive Stack)
- Design and develop reactive, non-blocking microservices using Java (8+/11/17) and Spring Boot / Spring WebFlux
- Build and consume RESTful and reactive APIs
- Implement reactive pipelines using Mono and Flux
- Work with Netty-based runtime, understanding event-loop and backpressure concepts
- Integrate with reactive data sources and messaging systems
- Ensure high performance, scalability, and resilience in distributed systems
- Implement logging, exception handling, monitoring, and fault tolerance
- Develop responsive, performant UI using React.js
- Use JavaScript (ES6+), HTML5, CSS3
- Build reusable components using React Hooks
- Integrate UI with backend and reactive APIs
- Optimize UI for performance and usability
- Participate actively in Agile/Scrum ceremonies
- Collaborate with product, UX, QA, and architecture teams
- Write unit, integration, and reactive tests
- Troubleshoot and resolve performance and production issues
- Contribute to architecture discussions and continuous improvement
Core Technical Skills:
- Strong proficiency in Java and Spring Boot
- Hands-on experience with Spring WebFlux and Reactive Programming
- Solid understanding of Reactive Streams, Mono / Flux, backpressure, and non-blocking I/O
- Experience with Microservices architecture
- Strong experience in React.js
- Good knowledge of REST APIs
- Experience with SQL and/or NoSQL databases
- Version control using Git and CI/CD pipelines
- Experience with Kafka or other messaging systems (reactive consumers/producers)
- Exposure to cloud platforms (AWS / Azure / GCP)
- Experience with Docker and Kubernetes
- Knowledge of security, authentication, and authorization
- Performance tuning and observability tools
- Strong problem-solving and analytical skills
- Ownership mindset with attention to quality
- Ability to work effectively with distributed teams
- Clear communication and stakeholder collaboration
- Bachelor’s degree in computer science, Engineering, or a related field (Master’s preferred).
$130 - $140K per annum
Key Skills
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