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Maksym, Java (Kotlin) Developer

Ukraine
Last Updated: 4 Jul 2023

- 4+ years of commercial experience with Java and 3+ years of commercial experience with Kotlin - Proficient in Java and Kotlin programming languages, with experience in Spring Boot, Spring Core, Spring Data, Spring web, and Spring Cloud frameworks - Skilled in developing and maintaining APIs for mobile and tablet apps, including Kotlin-based Screwfix app development and Java-based NextGear Capital Mobile Account Portal - Expertise in Gradle, Jenkins, GitLab CI/CD, Docker, Microservice Architecture, Scrum, and various databases and cloud platforms - Demonstrated ability to solve architectural issues and create new features, with experience in both front-end and back-end development - Worked mainly with Spring Framework stack, and different REST APIs for mobile apps and tablets, creating and maintaining them with Java and Kotlin. - Upper-Intermediate English

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Spring Cloud

Spring Cloud

Java

Java   4 yr.

Kotlin

Kotlin   3 yr.

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Dmytro Sh., Java Software Engineer

Poland
Last Updated: 27 Sep 2023

- 5+ years experience in Java and related technologies. - Good knowledge in programming Spring Framework, Hibernate, and Java Core. - Experience in creating microservices architecture APIs from scratch and deploying them. - Participated in the discussion of API architecture and technology stack. - Proficient in writing integration tests. - Upper-Intermediate English

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Spring Cloud

Spring Cloud

Java

Java

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Kiryl L., Java/Kotlin Software Engineer

Georgia
Last Updated: 7 Dec 2023

- A software engineer with over 5 years of experience in e-commerce and FinTech domains. - Boasts a strong grasp of Java, Kotlin, JavaScript, and TypeScript, having used them in various projects. - Proficient in back-end development with advanced knowledge of Spring frameworks, Hibernate, REST API design, and integrating systems like Elasticsearch and Kafka. - Has experience in integration payment systems such as Google Pay and Apple Pay. - Skilled in database management systems such as PostgreSQL, MySQL, and MongoDB. - Demonstrates expertise in containerization with Docker and Kubernetes and is adept in CI/CD practices using tools like GitLab CI/CD and Jenkins.

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Spring Cloud

Spring Cloud

Java

Java   5 yr.

Kotlin

Kotlin   2 yr.

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Serhii, Software Engineer / Team Lead / Architect

Bulgaria
Last Updated: 19 Mar 2024

- 22+ years experience in the IT industry as a back-end engineer; - 22 years of experience working with Java; - 10 years of experience working with Python; - 5 years of experience working with Microsoft Azure; - 7 years of experience working with React; - Deep skills working as a full-stack developer; - Strong experience working with Oracle Database; - 2+ years of experience working with Zeebe; - Good skills with Camunda; - Good skills with Scala; - Experience working with JavaScript; - Deep abilities working with Angular; - Experience working with RabbitMQ; - 2 years of experience working in a multinational financial services company; - Good knowledge of working with Microsoft SQL Server, MySQL, Oracle Database, SQL, MongoDB; - Deep skill working with AWS (ElasticSearch, EC2, Lambda, S3, EKS); - Good abilities with Google Cloud Platform (GCP); - Proficient in using Docker, Kubernetes, and Kafka; - Fluent in English, Intermediate German, and Intermediate French.

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Spring Cloud

Spring Cloud

Java

Java

React

React   7 yr.

Python

Python   10 yr.

Microsoft Azure

Microsoft Azure   5 yr.

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Olexandr A., Expert/Principal Java Tech Lead

Poland
Last Updated: 4 Jul 2023

- 10+ years of work experience with Java stack and about five years as Team Lead. - Digital financial services background - Confident knowledge in development with Java Frameworks. - Experience as a cloud architect. - Experience with implementing Full Stack Features. - Experience with public reports at the conference. - Experience in leading development teams. -Hand on development of the application from scratch, maintaining the legacy projects, testing, bug fixing, and deployment. - Experience in collaboration with distributed (including international) teams leveraging SCRUM methodology. - Able to work both as a team player and on individual assignments. - Fluent in English. - Available ASAP

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Spring Cloud

Spring Cloud

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Table of Contents

How and where is Spring Cloud used?

Case NameCase Description
Microservices ArchitectureSpring Cloud is widely used for building microservices architecture, where complex applications are broken down into smaller, independent services that can be developed, deployed, and scaled independently. It provides various tools and frameworks, such as service discovery, load balancing, circuit breakers, and distributed tracing, that help in creating resilient and scalable microservices-based applications.
Service Discovery and RegistrationSpring Cloud provides a service discovery and registration mechanism that allows services to dynamically locate and communicate with each other. It integrates with popular service registries like Netflix Eureka and Consul, enabling automatic registration and discovery of services within a distributed system. This simplifies the process of managing and scaling the services in a microservices architecture.
Centralized Configuration ManagementSpring Cloud Config enables centralized configuration management for distributed systems. It allows applications to retrieve their configuration from a centralized configuration server, eliminating the need for manual configuration updates on each individual service instance. This ensures consistency and allows for dynamic configuration changes without requiring application restarts.
Load Balancing and Fault ToleranceSpring Cloud integrates with client-side load balancing frameworks like Netflix Ribbon, enabling automatic load balancing across multiple instances of a service. It also provides fault tolerance mechanisms, such as circuit breakers with Netflix Hystrix, that prevent cascading failures and provide fallback options when services are unavailable or experiencing issues. This helps in improving the overall reliability and resilience of distributed systems.
Distributed TracingSpring Cloud Sleuth and Zipkin enable distributed tracing for microservices-based applications. Distributed tracing allows developers to track and analyze the flow of requests across multiple services, providing insights into performance bottlenecks and troubleshooting issues. It helps in understanding the interactions between different services and optimizing the overall system performance.

Pros & cons of Spring Cloud

9 Pros of Spring Cloud

  • 1. Simplified Microservices Development: Spring Cloud provides a comprehensive set of tools and frameworks that simplify the development of microservices-based applications. It offers features like service discovery, load balancing, and fault tolerance, which make it easier to build and maintain scalable distributed systems.
  • 2. Robust Fault Tolerance: Spring Cloud incorporates the Circuit Breaker pattern, which prevents cascading failures by isolating and handling faults in individual services. This ensures that failures in one service do not bring down the entire system, resulting in increased resilience and reliability.
  • 3. Service Discovery and Load Balancing: Spring Cloud integrates with popular service discovery solutions like Netflix Eureka and Consul, enabling automatic registration and discovery of services. It also provides load balancing capabilities, distributing the traffic across instances of a service for improved performance and scalability.
  • 4. Configurations Management: With Spring Cloud Config, you can manage and centralize the configurations of your microservices in a distributed environment. It allows dynamic configuration updates without the need for redeployment, making it easier to adapt to changes in real-time.
  • 5. Distributed Tracing: Spring Cloud Sleuth provides distributed tracing capabilities, allowing you to track and analyze requests as they flow through multiple services. This helps in identifying performance bottlenecks, troubleshooting issues, and optimizing the overall system performance.
  • 6. Intelligent Routing and API Gateway: Spring Cloud Gateway enables intelligent routing and acts as a single entry point for all the microservices in your system. It allows you to implement cross-cutting concerns like authentication, rate limiting, and request filtering, providing a unified and secure API gateway.
  • 7. Scalability and Elasticity: Spring Cloud supports dynamic scaling of services based on demand. By leveraging technologies like Kubernetes and Docker, you can easily scale your microservices up or down to handle varying workloads, ensuring optimal resource utilization and cost-efficiency.
  • 8. Seamless Integration with Spring Ecosystem: Spring Cloud seamlessly integrates with other Spring projects like Spring Boot, Spring Data, and Spring Security. This allows developers to leverage the extensive capabilities of the Spring ecosystem and build robust, enterprise-grade microservices applications.
  • 9. Active Community and Support: Spring Cloud has a vibrant and active community of developers and contributors. It benefits from regular updates, bug fixes, and new feature releases, ensuring that you have access to the latest advancements and best practices in building cloud-native applications.

9 Cons of Spring Cloud

  • 1. Learning Curve: Spring Cloud introduces various concepts and frameworks, which may have a steep learning curve for developers who are new to the Spring ecosystem. It requires a solid understanding of microservices architecture and distributed systems principles to effectively utilize the Spring Cloud tools.
  • 2. Configuration Complexity: While Spring Cloud Config simplifies configuration management, it can become complex to manage configurations for a large number of microservices. Careful planning and organization of configuration files are required to avoid configuration drift and maintain consistency across services.
  • 3. Service Dependency: Spring Cloud heavily relies on service discovery and registry tools like Netflix Eureka or Consul. This introduces a dependency on these tools, and if they experience issues or downtime, it can impact the availability and functionality of the entire system.
  • 4. Operational Overhead: Deploying and managing a distributed system built with Spring Cloud requires additional operational efforts compared to a monolithic application. It involves setting up and maintaining infrastructure components like service registries, load balancers, and monitoring solutions.
  • 5. Performance Overhead: The additional layers and components introduced by Spring Cloud can incur some performance overhead compared to a monolithic application. While the impact is minimal, it’s important to consider and optimize performance-sensitive microservices when using Spring Cloud.
  • 6. Vendor Lock-in: Spring Cloud provides integrations with specific cloud platforms like Netflix and Kubernetes. Depending heavily on these integrations may lead to vendor lock-in, limiting the flexibility to switch between cloud providers or platforms in the future.
  • 7. Complexity of Distributed Tracing: While Spring Cloud Sleuth simplifies distributed tracing, the complexity can increase as the number of services and interactions grows. Proper instrumentation and configuration are required to ensure accurate tracing and minimize performance impact.
  • 8. Limited Support for Some Features: Spring Cloud may have limited support or maturity for certain features compared to other cloud-native frameworks. It’s important to evaluate the specific requirements of your application and ensure Spring Cloud meets your needs.
  • 9. Version Compatibility: As Spring Cloud integrates with various Spring projects, ensuring version compatibility across different components can be challenging. It’s crucial to carefully manage and test the compatibility of different Spring Cloud dependencies to avoid any unexpected issues.

Cases when Spring Cloud does not work

  1. Unsupported Versions of Java: Spring Cloud requires at least Java 8 or higher to work properly. If you are using an older version of Java, you may encounter compatibility issues and Spring Cloud may not function as expected.
  2. Incorrect Spring Boot Version: Spring Cloud is designed to work with specific versions of Spring Boot. If you are using an incompatible version of Spring Boot, it may result in compatibility issues and Spring Cloud may not work as intended. Make sure to check the compatibility matrix provided by the Spring Cloud documentation.
  3. Insufficient Memory Allocation: Spring Cloud applications often require a certain amount of memory to run efficiently. If your system does not have enough memory allocated, it can lead to performance issues and Spring Cloud may not function optimally. Ensure that you have allocated sufficient memory to your Spring Cloud application.
  4. Network Configuration Issues: Spring Cloud relies on network communication between different components and services. If there are network configuration issues, such as firewall restrictions or incorrect network settings, it can prevent the proper functioning of Spring Cloud. Check your network configuration to ensure that it allows the necessary communication between Spring Cloud components.
  5. Incompatible Dependencies: Spring Cloud relies on a set of dependencies that need to be compatible with each other. If you have conflicting or incompatible dependencies in your project, it can result in runtime errors and Spring Cloud may not work as expected. Make sure to align the versions of your dependencies according to the Spring Cloud documentation to avoid compatibility issues.
  6. Missing Configuration: Spring Cloud heavily relies on configuration properties to function correctly. If you have missing or incorrect configuration settings, it can lead to unexpected behavior and Spring Cloud may not work as intended. Ensure that you have properly configured all the necessary properties for your Spring Cloud application.
  7. Resource Constraints: Depending on the workload and system resources, Spring Cloud may require certain resources like CPU, disk space, or network bandwidth. If you are running Spring Cloud in an environment with resource constraints, it can affect its performance and cause issues. Make sure to allocate sufficient resources to your Spring Cloud deployment.
  8. Security Restrictions: If your environment has strict security restrictions in place, it may interfere with the functioning of Spring Cloud. Certain security measures like secure network protocols, access control policies, or certificate requirements may need to be properly configured and aligned with Spring Cloud’s requirements to ensure smooth operation.

What are top Spring Cloud instruments and tools?

  • Spring Cloud Config: A tool that provides externalized configuration for distributed systems. It allows you to manage the configuration of your applications across different environments and provides a central place to store and version your configuration files. Spring Cloud Config has been widely adopted since its release in 2014 and is an essential component in many microservices architectures.
  • Netflix Eureka: Originally developed by Netflix, Eureka is a service discovery tool that allows services to find and communicate with each other without hardcoding their locations. It was integrated into Spring Cloud in 2015 and has become one of the most popular service discovery solutions in the Spring ecosystem.
  • Spring Cloud Netflix: This is a collection of libraries that integrate popular Netflix OSS components, such as Hystrix for circuit breaking, Ribbon for client-side load balancing, and Zuul for API gateway functionality, into Spring applications. These libraries have been widely adopted by developers to build resilient and scalable microservices.
  • Spring Cloud Sleuth: Sleuth is a distributed tracing solution that helps you track and monitor requests as they flow through your microservices architecture. It provides essential insights into the latency and dependencies of your services, making it easier to identify and troubleshoot performance bottlenecks. Sleuth was introduced in 2016 and has gained significant traction since then.
  • Spring Cloud Stream: Stream is a framework for building event-driven microservices. It provides a simple and declarative model for developing message-driven applications by abstracting away the complexities of messaging systems. With Stream, you can easily integrate with various messaging platforms like Apache Kafka or RabbitMQ and focus on writing business logic. It has been available since 2016 and has been embraced by developers for building scalable and reactive systems.
  • Spring Cloud Data Flow: Data Flow is a cloud-native data integration and processing framework. It allows you to build, deploy, and manage data pipelines for batch and stream processing. Data Flow provides an intuitive UI and a RESTful API for designing and orchestrating data workflows. It was introduced in 2017 and has gained popularity as a tool for building data-centric microservices architectures.
  • Spring Cloud Gateway: Gateway is a reactive API gateway built on top of Spring WebFlux. It provides essential features like routing, filtering, and load balancing for HTTP and WebSocket traffic. Gateway is designed to handle high loads and is well-suited for building cloud-native applications. It was released in 2018 and has become a popular choice for developers looking for a modern and scalable API gateway solution.
  • Spring Cloud Security: This module provides integration with Spring Security to secure microservices. It offers features like authentication, authorization, and token management for distributed systems. Spring Cloud Security has been widely adopted since its inclusion in the Spring Cloud family and is considered a reliable choice for securing microservices.
  • Spring Cloud Contract: Contract testing is an essential part of building resilient microservices. Spring Cloud Contract provides a way to write and verify contracts between services, ensuring that they can communicate effectively and without breaking each other. It was introduced in 2016 and has gained popularity as a tool for ensuring compatibility and collaboration between microservices teams.
  • Spring Cloud Kubernetes: Kubernetes has become the de facto standard for container orchestration, and Spring Cloud Kubernetes provides seamless integration between Spring Cloud and Kubernetes. It offers features like service discovery, configuration management, and load balancing specifically tailored for Kubernetes environments. Spring Cloud Kubernetes has gained traction since its release in 2018 as more organizations adopt Kubernetes for their microservices deployments.

Hard skills of a Spring Cloud Developer

As a Spring Cloud Developer, your hard skills will play a crucial role in your success. Here is an overview of the hard skills required at different levels of expertise:

Junior

  • Java: Proficiency in Java programming language and its core concepts.
  • Spring Framework: Understanding of the Spring Framework and its various modules.
  • Spring Boot: Knowledge of building and deploying applications using Spring Boot.
  • RESTful APIs: Familiarity with designing and implementing RESTful APIs.
  • Microservices: Understanding of microservices architecture and its principles.

Middle

  • Spring Cloud: Experience in developing and deploying microservices using Spring Cloud.
  • Containerization: Knowledge of containerization technologies like Docker and Kubernetes.
  • Service Discovery: Proficiency in service discovery tools like Netflix Eureka.
  • API Gateway: Familiarity with API gateway patterns and tools like Spring Cloud Gateway or Zuul.
  • Distributed Configuration: Understanding of distributed configuration management using Spring Cloud Config.
  • Fault Tolerance: Experience in implementing fault tolerance mechanisms using tools like Hystrix.
  • Monitoring and Tracing: Knowledge of monitoring and tracing tools like Spring Cloud Sleuth and Zipkin.

Senior

  • Distributed Messaging: Proficiency in messaging systems like Apache Kafka or RabbitMQ for communication between microservices.
  • Security: Experience in securing microservices using Spring Security and OAuth 2.0.
  • Performance Optimization: Knowledge of performance optimization techniques for microservices.
  • Load Balancing: Understanding of load balancing strategies for distributed systems.
  • Deployment and Scaling: Experience in deploying and scaling microservices in cloud environments like AWS or Azure.
  • Database Integration: Familiarity with integrating different databases with microservices.
  • Continuous Integration and Deployment: Proficiency in CI/CD pipelines using tools like Jenkins or GitLab.

Expert/Team Lead

  • Architecture Design: Ability to design scalable and resilient microservices architectures.
  • Performance Tuning: Experience in optimizing the performance of microservices at scale.
  • DevOps: Knowledge of DevOps practices and tools for automating infrastructure and deployments.
  • Team Leadership: Skills in leading and mentoring a team of developers.
  • Problem Solving: Ability to analyze complex problems and provide innovative solutions.
  • Code Review: Proficiency in conducting code reviews and ensuring code quality.
  • Agile Methodologies: Experience in working with Agile development methodologies like Scrum or Kanban.
  • Client Interaction: Ability to communicate effectively with clients and stakeholders.
  • Project Management: Skills in managing projects and ensuring timely delivery.
  • Continuous Learning: Willingness to continuously learn and stay updated with the latest technologies and trends.
  • Technical Documentation: Proficiency in documenting technical designs and specifications.

TOP 12 Tech facts and history of creation and versions about Spring Cloud Development

  • Spring Cloud Development is a framework for building cloud-native applications. It follows the microservices architectural style, allowing developers to build scalable and resilient applications.
  • Spring Cloud was created in the year 2014 by the Spring team at Pivotal Software, which is now a part of VMware.
  • One of the key features of Spring Cloud is its support for service discovery and registration. It provides integrations with popular service discovery tools like Netflix Eureka and Consul.
  • Another groundbreaking aspect of Spring Cloud is its support for distributed configuration management. It allows applications to retrieve configuration properties from a central configuration server, enabling easy configuration changes without redeploying the application.
  • Spring Cloud provides a resilient and fault-tolerant communication layer through its integration with Netflix Ribbon, which offers client-side load balancing.
  • The framework also includes support for circuit breakers through Netflix Hystrix, enabling applications to gracefully handle failures in remote service dependencies.
  • Spring Cloud offers a distributed tracing solution with integration to Zipkin, allowing developers to monitor and troubleshoot requests across multiple services.
  • With Spring Cloud Stream, developers can build event-driven microservices by providing abstractions for messaging middleware like Apache Kafka and RabbitMQ.
  • Spring Cloud provides a powerful routing and filtering solution with Spring Cloud Gateway, which allows developers to build API gateways for their microservices.
  • Spring Cloud Contract enables contract testing between services, ensuring that they can communicate effectively based on agreed-upon contracts.
  • The latest stable version of Spring Cloud is Spring Cloud 2020.0.3, which was released in May 2021.
  • Spring Cloud has a vibrant and active community, with continuous improvements and updates being made to the framework. It has gained popularity among developers due to its comprehensive features and ease of use.

Soft skills of a Spring Cloud Developer

Soft skills are essential for a Spring Cloud Developer to effectively collaborate with teams, communicate ideas, and deliver high-quality software solutions. Here are the key soft skills required at different levels of expertise:

Junior

  • Problem Solving: Ability to analyze and solve problems efficiently to ensure smooth development processes.
  • Communication: Clear and concise communication to effectively convey ideas and collaborate with team members.
  • Adaptability: Willingness to learn and adapt to new technologies and frameworks in the Spring Cloud ecosystem.
  • Attention to Detail: Paying close attention to detail to identify and fix bugs or issues in the codebase.
  • Teamwork: Collaborating effectively with team members to achieve project goals and deliver quality software.

Middle

  • Leadership: Taking ownership of assigned tasks and guiding junior developers to achieve project objectives.
  • Time Management: Efficiently managing time and prioritizing tasks to meet project deadlines.
  • Mentoring: Assisting junior developers in their professional growth by providing guidance and support.
  • Critical Thinking: Applying analytical thinking to evaluate complex problems and make informed decisions.
  • Conflict Resolution: Resolving conflicts within the team and promoting a positive work environment.
  • Collaboration: Working closely with cross-functional teams to ensure seamless integration of components.
  • Customer Focus: Understanding customer requirements and delivering solutions that meet their needs.

Senior

  • Strategic Thinking: Developing long-term plans and strategies to improve the overall software architecture.
  • Project Management: Leading and managing projects, ensuring successful delivery within budget and timeline.
  • Innovation: Identifying opportunities for innovation and driving the adoption of new technologies.
  • Decision Making: Making well-informed decisions based on analysis and considering the impact on the business.
  • Technical Leadership: Providing technical guidance and mentorship to junior and middle developers.
  • Client Relationship Management: Building and maintaining strong relationships with clients.
  • Quality Assurance: Ensuring the delivery of high-quality software through code reviews and testing.
  • Continuous Learning: Keeping up-to-date with the latest trends and advancements in Spring Cloud development.

Expert/Team Lead

  • Strategic Planning: Developing and implementing long-term strategies for the team and the organization.
  • Team Management: Leading and managing a team of developers, ensuring efficient collaboration and productivity.
  • Business Acumen: Understanding business goals and aligning technical decisions to drive business success.
  • Influencing Skills: Persuading and influencing stakeholders to adopt recommended strategies and solutions.
  • Risk Management: Identifying and mitigating risks associated with software development projects.
  • Enterprise Architecture: Designing and implementing scalable and robust architectures for enterprise-level systems.
  • Continuous Improvement: Driving continuous improvement initiatives to enhance team performance and efficiency.
  • Thought Leadership: Contributing to the Spring Cloud community through blogs, conferences, and open-source contributions.
  • Client Engagement: Building and maintaining strong relationships with key clients and stakeholders.
  • Strategic Partnerships: Establishing partnerships with other organizations to drive innovation and growth.
  • Empathy: Understanding the needs and challenges of team members and providing support and mentorship.

TOP 10 Spring Cloud Related Technologies

  • Java

    Java is the most popular programming language for Spring Cloud software development. It offers a robust and reliable platform with a vast ecosystem of libraries and frameworks. With its object-oriented approach and cross-platform compatibility, Java is widely used for building scalable and high-performance applications.

  • Spring Boot

    Spring Boot is a powerful framework that simplifies the development of Spring-based applications. It provides a convention-over-configuration approach, allowing developers to focus on writing business logic rather than dealing with boilerplate code. Spring Boot integrates seamlessly with Spring Cloud, making it an ideal choice for building microservices.

  • Spring Cloud Config

    Spring Cloud Config provides a centralized configuration management solution for distributed systems. It allows developers to externalize their configuration and manage it dynamically across different environments. With Spring Cloud Config, you can easily update configuration properties without the need for redeploying your applications.

  • Netflix Eureka

    Netflix Eureka is a service registry and discovery server that enables microservices to locate and communicate with each other. It provides a scalable and fault-tolerant solution for service discovery in a distributed system. Integrating Netflix Eureka with Spring Cloud makes it effortless to implement dynamic service registration and discovery.

  • Spring Cloud Gateway

    Spring Cloud Gateway is a lightweight and efficient API gateway that routes incoming requests to the appropriate microservices. It offers features like load balancing, circuit breaking, and request rate limiting. With its flexible routing capabilities and seamless integration with Spring Cloud, Spring Cloud Gateway is an excellent choice for building scalable and resilient microservice architectures.

  • Apache Kafka

    Apache Kafka is a distributed streaming platform that allows developers to build real-time data pipelines and streaming applications. It provides high throughput, fault tolerance, and horizontal scalability, making it suitable for handling large volumes of data. Spring Cloud Stream provides seamless integration with Apache Kafka, enabling developers to easily build event-driven microservices.

  • Spring Cloud Sleuth

    Spring Cloud Sleuth is a distributed tracing solution that helps developers monitor and debug microservices in a distributed system. It provides end-to-end tracing of requests across different microservices, allowing you to identify performance bottlenecks and troubleshoot issues. With its integration with popular logging and monitoring tools, Spring Cloud Sleuth simplifies the observability of your applications.

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