Senior Java Developer with Hexagonal Architecture Experience

@gustavoguanilo

Hola! Soy Desarrollador Senior Java con amplia experiencia en Java 21+ y Spring Boot, y puedo liderar el desarrollo de tu backend usando Arquitectura Hexagonal + DDD para lograr un sistema escalable, mantenible y sólido. Qué entregaré • Diseño e implementación de la arquitectura base (capas limpias: dominio, aplicación e infraestructura). • Desarrollo del backend con APIs REST bien estructuradas usando Spring Boot. • Integración con PostgreSQL como base de datos principal y Redis para caché, colas y locking distribuido. • Implementación de negocio complejo de forma desacoplada y testeable. • Código bien documentado, con pruebas unitarias y de integración, y orientado a producción. Por qué elegir mi oferta Tengo experiencia real construyendo backends de alta concurrencia y complejidad usando Hexagonal Architecture y DDD, con enfoque en calidad, rendimiento y mantenibilidad. Entrego código listo para producción y fácil de escalar. Para comenzar ¿Tienes una lista de requisitos o historias de usuario? ¿Necesitas eventos/mensajería (Kafka/RabbitMQ)? ¿Debo incluir configuración de CI/CD y Docker? Listo para empezar y entregar una arquitectura robusta y escalable desde el primer commit.

@Herculesz

Hi I am a senior Java engineer specializing in Java 21+, Spring Boot, microservices, Hexagonal Architecture, and Domain-Driven Design for large-scale systems. The main technical challenge in real-time auctions is handling extreme concurrency while keeping bids consistent, ordered, and resistant to race conditions. I solve this by using Redis for distributed locking and fast state handling, PostgreSQL for strong consistency, and event-driven flows for bid validation and state transitions. I have built high-concurrency systems including marketplaces and live transaction engines, with proven experience in real-time bidding logic. I design project skeletons that are clean, testable, and future-proof, aligning domain models strictly with business rules under DDD. My focus is on technical leadership, critical architecture decisions, and building a backend that can scale safely under heavy load. I bring strong ownership, clear communication, and the ability to translate complex architecture into stable production systems. Thanks, Hercules

@vineetmishra82

As a highly skilled and experienced Java developer, I'm confident I have what it takes to meet your project's needs. With over a decade of experience in developing high-performance, scalable backend systems with Java and Spring Boot, I've successfully tackled projects requiring advanced knowledge of real-time auction implementation, hybrid architecture as well as critical technical decision-making - all skills that are central to the undertaking you're seeking to accomplish. Moreover, my expertise extends beyond mere programming knowledge. I have deep familiarity with the Hexagonal Architecture and Domain-Driven Design (DDD), which are key elements for your project. My proficiency in ensuring the smooth functioning of microservices is also second to none. In line with your technical requirements, I'm a master at using PostgreSQL and Redis for caches queues, locking operations, and skilled in handling high-concurrency systems; attributes crucial for successful delivery of real time auction system. Lastly, my broad range of technical background which includes knowledge of Kafka/RabbitMQ events/messaging systems and integrating software development kits (SDKs) for video streaming will not only help me in adapting to your ecosystem quickly but also add value to your team at large. With prior experience working with AWS cloud infrastructure and DevOps tools like Docker for CI/CD pipelining I can ensure deployment-ready deliveries that can be scaled without hassle.

@jinufeb14

With over a decade of experience under my belt, I am confident that I am the best Java developer for this project. Liquid Hexagonal Architecture and Domain Driven Design (DDD) are not unfamiliar to me - I have executed them in real-time projects in the past. Building and improving real-time auction systems will be second nature to me. Additionally, I have knack for making crucial technical decisions and leading Java Spring Boot back-end development, making me an optimal fit for your high-impact project. In regards to requisite skills, I am well-versed in Java 21+ and Spring Boot. I possess advanced knowledge of PostgreSQL and Redis which are critical for handling large amounts of data in high-concurrency systems like the one you're creating.`But it doesn't stop there, being a polyglot gives me an edge in integration work with diverse event frameworks such as Kafka and RabbitMQ—ideal for marketplaces running on real time events.` Furthermore, my exposure with video streaming SDKs will come in handy as well. On top of technical expertise, I bring to the table strategic mindset, effective communication abilities, and a strong sense of responsibility and ownership. Traveling from basics to managing complex technical decisions has always been my strong suit. Having worked on large-scale projects like yours before, I am confident that I can deliver above market standards efficiently.

@juanjosec63

Hola, cuento con más de 10 años liderando backend en Java + Spring Boot, diseñando arquitecturas Hexagonal + DDD y sistemas de alta concurrencia. He trabajado en plataformas en tiempo real (incluyendo flujos tipo subasta), usando PostgreSQL, Redis (locking, colas, caché) y mensajería para garantizar consistencia y baja latencia. Puedo definir y programar el esqueleto completo del proyecto, tomar decisiones técnicas críticas y guiar al equipo con foco en escalabilidad y mantenibilidad. Trabajo cómodo con microservicios, Docker y CI/CD, y tengo experiencia en entornos cloud. Si buscan ownership real y criterio arquitectónico sólido, estoy listo para comenzar.

@abhisaini0188

Hello, Thank you for sharing this opportunity, it sounds like a great fit, and I’d be glad to be involved. I’ve worked on similar projects and am confident I can contribute meaningful value to your team. I focus on delivering high-quality, reliable solutions while ensuring the process is smooth and efficient for my clients. My goal is always to build solutions that are both technically solid and easy to maintain. You’re welcome to review my profile to see examples of my previous work. If it aligns with what you’re looking for, I’d be happy to discuss your project in more detail and outline how I can support your goals. I’m available to start immediately and can dedicate my full attention from day one. Let’s connect and explore how we can make this project a success together. Looking forward to your response. With Regards! Abhishek Saini

@johibkhan

Hi, With over a decade of experience in Java development, I have successfully implemented various backend projects using Spring Boot. My expertise extends to crucial technical decision-making, thus ensuring an excellent fit with your project's requirement of defining and leading the hybrid Hexagonal+ DDD+Microservices architecture. I've effectively handled databases including PostgreSQL and Redis for high-concurrency systems ensuring low-latency, caching and efficient queuing. Alongside my strong proficiency in Java and Spring Boot, I bring comprehensive knowledge and practical application of Microservice Architecture, Hexagonal Architecture, and Domain-Driven Design (DDD). Having constructed robust trading and fintech platforms throughout my career, I have dealt extensively with real-time workloads, which would be relevant to your project's need for a real-time auction system. My experience showcases not just technical skills but also ownership, clear communication style and the ability to make complex decisions that align well with your desired soft skills.

@johnallenvillan1

Hola, como Senior Java Developer con más de 10 años de experiencia, ofrezco soluciones sólidas para su proyecto. Implementaré la arquitectura híbrida de Hexagonal + DDD + Microservicios y lideraré el desarrollo backend en Java Spring Boot. Con mi experiencia, garantizo la programación eficiente de la subasta en tiempo real y la toma de decisiones técnicas críticas. Estoy listo para programar las bases del proyecto y trabajar en entornos de alta concurrencia. ¿Cómo podemos proceder con su proyecto?

@Julian29

Hello!! I READ YOUR REQUIREMENTS CAREFULLY AND FULLY UNDERSTAND THE PROJECT SCOPE FOR A SENIOR JAVA DEVELOPER TO LEAD THE BACKEND DEVELOPMENT OF A REAL-TIME AUCTION PLATFORM USING HEXAGONAL ARCHITECTURE + DDD. I WILL WORK IN STAGES TO DELIVER A SCALABLE, HIGH-CONCURRENCY BACKEND WITH CLEAN ARCHITECTURE AND ROBUST MICROSERVICES. I have 10+ years of experience in Java/Spring Boot backend development, including: Designing and implementing Hexagonal Architecture with DDD Building high-concurrency systems and real-time auction platforms Advanced PostgreSQL, Redis (cache, queues, locking) Microservices, event-driven architecture (Kafka/RabbitMQ) Integration with video streaming SDKs for live bidding Docker, CI/CD pipelines, and cloud deployments (AWS/OVH) I have led technical teams, made critical architectural decisions, and built project skeletons from scratch, ensuring maintainable and scalable systems. I WILL PROVIDE 2 YEAR FREE ONGOING SUPPORT AND COMPLETE SOURCE CODE, WE WILL WORK WITH AGILE METHODOLOGY AND WILL GIVE YOU ASSISTANCE FROM ZERO TO DEPLOYMENT. I eagerly await your positive response. Thanks

@dragomira2

Hi Enma R., I am excited about the opportunity to collaborate on your project as a Senior Java Developer with expertise in Hexagonal Architecture and DDD. With over a decade of experience in backend development using Java and Spring Boot, I have successfully led complex projects, including real-time auction systems that require high concurrency and live streaming capabilities. My extensive background in implementing Microservices and designing systems with Hexagonal Architecture equips me to redefine your hybrid architecture effectively. I have a proven track record of making critical technical decisions that enhance system performance and scalability. My proficiency in PostgreSQL and Redis enables me to design efficient data management strategies, ensuring optimal performance for high-demand applications. I understand the importance of clear communication across both technical and non-technical teams and am committed to taking ownership of my work. My experience in cloud environments, particularly with AWS, along with basic DevOps skills using Docker and CI/CD, will facilitate a smooth development process. I am eager to bring my strategic thinking and technical expertise to your team and contribute to the development of a robust backend for your real-time auction platform. Looking forward to the possibility of working together. Best regards, Dragomir A.

@durgesh8527

As a seasoned software engineer with extensive experience in Java and a specialization in Spring Boot, I'm well-equipped to take on your project requiring intricate knowledge of Hexagonal Architecture and Domain-Driven Design. My dedication to quality coding has spanned over a decade, enabling me to effortlessly develop the skeletal structure of high-concurrency projects, such as real-time auction systems. With proven competence in Microservices and database management platforms like PostgreSQL, I am ready to lead your project's backend development expertly. Moreover, my technical acumen extends beyond traditional know-how. While I've mastered the necessary technical requirements you sought in Java, Spring Boot, Redis and related tools for this project, my additional skills pertaining to messaging systems (i.e., Kafka, RabbitMQ), video streaming SDKs integration and being well versed with DevOps fundamentals teases my ability to bring more value into your table.

@maximg10

⭐Hi, I’m ready to assist you right away!⭐ I believe I’d be a great fit for your project since I have over 10 years of experience in backend development with Java and Spring Boot, specializing in real-time auction implementation and hybrid architecture like Hexagonal and DDD. My expertise includes leading Java Spring Boot backend development, critical technical decision-making, and establishing the project's foundation. I excel in designing and implementing real-time auction systems, and I am well-versed in Java 21+, Spring Boot, Microservices, Hexagonal Architecture, DDD, PostgreSQL, and Redis for high-concurrency systems. Additionally, I have a strong background in marketplaces, real-time systems, and integrating video streaming SDKs. If you have any questions, would like to discuss the project in more detail, or would like to know how I can help, we can schedule a meeting. Thank you. Maxim

@sivakumar676

Hola, Enma. Tengo amplia experiencia en Java 21 y Spring Boot, liderando backends con arquitectura hexagonal y DDD en microservicios de alta concurrencia con PostgreSQL y Redis. Me encargo de definir decisiones técnicas críticas y construir el esqueleto del proyecto para una subasta en tiempo real, dejando una base sólida, escalable y lista para integrar mensajería y streaming si aplica. Saludos, Siva

@anilptk

Hello there, I am excited to submit my proposal for the Senior Java + Spring Boot Developer role with expertise in hexagonal architecture + DDD. With over 10 years of backend development experience, including real-time auction programming, hybrid architecture redesign, and critical technical decision-making, I am well-equipped to lead the Java Spring Boot backend development for your project. My proven skills in Microservices, Hexagonal + DDD architecture, PostgreSQL, Redis, high-concurrency systems, and desirable experience in marketplaces and real-time systems make me a valuable asset to your team. I possess soft skills such as strategic thinking, complex technical decision-making, clear communication, and a strong sense of responsibility and ownership, which have been instrumental in my successful contribution to large projects. Regards, anilptk

@QuickMentor

Senior Java Developer with Hexagonal Architecture Experience I’m an experienced Full Stack Developer skilled in JavaScript (React, Node.js, Angular), Python (Django, Flask), PHP (Laravel, WordPress), and mobile frameworks like Flutter. I build high-performing, scalable, and fully responsive web and mobile applications tailored to your business needs. I ensure clean, efficient code and timely delivery. To kick things off, I also offer a free initial consultation to fully understand your project requirements. Let’s discuss your project today and start building a solution that exceeds your expectations!

@Ashnasajid

Hi, I can do this. With over 10 years of experience in backend development using Java and Spring Boot, I have successfully implemented real-time auction systems and redefined architectures using Hexagonal, DDD, and microservices. My expertise includes Java 21+, PostgreSQL, and Redis for caching and queuing, ensuring high concurrency and performance. I have a proven track record in leading backend development, making critical technical decisions, and establishing project foundations. My experience in marketplaces and real-time systems, along with knowledge of messaging frameworks like Kafka, positions me well for this role. I also possess basic DevOps skills with Docker and CI/CD, and I am comfortable working in cloud environments like AWS. I am committed to clear communication and responsible ownership of my work. I look forward to the opportunity to contribute to your team. Ashnasajid

@artemb35

Hi there, I understand that your main goal is to find a Senior Java Developer with expertise in Hexagonal Architecture to enhance your project's structure and maintainability. In my previous role, I successfully implemented Hexagonal Architecture for a financial application, which improved the modularity and testability of the codebase, leading to a 25% reduction in bugs. Additionally, I optimized API integrations that resulted in a 30% increase in system performance. To address your requirements, I will design a robust Hexagonal Architecture that promotes separation of concerns, making the application easier to maintain and scale. I will also ensure that all components are thoroughly tested to guarantee high reliability and performance. I would be happy to discuss your needs and get started right away. Best regards, Artem

@mubeenm5026

With over a decade of experience in Java/Spring Boot backend development, and expert knowledge of Hexagonal architecture and DDD, I am confident that I am the best fit for your project. I have a proven track record of delivering high-quality, scalable solutions that are tailor-made for projects like yours. My advanced skills in areas such as microservices, using Redis for caching and queuing, and my exposure to high-concurrency systems will ensure that the real-time auction platform you envision is not only implemented flawlessly, but is also highly performant. In addition to my technical expertise, I bring to the table strong decision-making abilities even in complex situations. This has not only allowed me to make crucial design decisions while leading backend development projects, but also ensures that the hybrid architecture we will be implementing aligns perfectly with your business needs. Apart from these mandatory requirements, my grasp of event-driven messaging systems like Kafka or RabbitMQ and my experience working with video streaming SDKs would further enhance your project.

@yashwagill7

Hello, I understand you need a Senior Java + Spring Boot developer to build a real-time auction backend and redefine your architecture with Hexagonal + DDD + Microservices. I can design the project skeleton, implement high-concurrency systems using Redis and PostgreSQL, and ensure real-time bidding with live updates. My experience includes complex backend systems, real-time event handling, and scalable microservices, allowing fast, reliable performance while guiding critical technical decisions. I can lead your backend development with clear architectural strategy and ownership. Warm Regards, Shamim M