Arquitecto Backend / Senior Java Spring Boot Developer

@AwaisChaudhry

Estimado equipo, Entiendo que buscan un Arquitecto Backend / Senior Java con 10+ años para definir y construir la base técnica de un sistema complejo, aplicando DDD y arquitectura hexagonal, con una separación clara de domain, application e infrastructure. Mi enfoque es diseñar una arquitectura sólida y escalable desde cero, establecer estándares y repositorios, definir APIs seguras y de alto rendimiento, y preparar una base lista para múltiples equipos. Implementaré proyectos base con pruebas y documentación profesional, integrando Java 21, Spring Boot, JPA/Hibernate, PostgreSQL, Redis, RabbitMQ y Docker, con pipelines y revisión de código mediante PRs y SonarCloud. Entrego código limpio, pruebas automatizadas y una guía de arquitectura para escalar, con entregables medibles y configuraciones listas para crecer. ¿Qué criterios de rendimiento y SLA deben tener las APIs desde el primer entregable, y qué métricas clave deben estar cubiertas en la primera versión de la base? ¿Existe una guía interna de convenciones de código y estructura de repositorios que deba respetar ya o conviene establecerla en este proyecto? ¿Qué nivel de autonomía técnica esperan para tomar decisiones de alto nivel y cuándo se necesita validación de stakeholders? ¿Qué dominios o subdominios deben estar cubiertos en la arquitectura inicial y qué límites de contexto se deben respetar? ¿Qué eventos de negocio son prioritarios para un diseño orientado a eventos y qué herramientas de observabilidad s

@diektech

Hi, This is Elias from Miami. I checked your project description and understand you’re looking for a Senior Java Backend Developer with extensive experience in software architecture to create robust backend solutions. I’ve worked on several similar platforms and understand the key technical challenges involved. My approach would focus on leveraging Spring Boot and Hibernate to build scalable APIs, while ensuring optimal performance with MySQL or PostgreSQL. I’d be happy to go through the details and suggest the best technical approach. I have a few questions to get a better understanding: Q1 – What specific user roles and permissions do you envision for your application? – Q2 – Are there any existing systems you need to integrate with? – Q3 – What are your scalability requirements for the backend? Looking forward to hearing from you.

@kamran2012

Hi, Diseñaré la arquitectura base del sistema aplicando DDD con arquitectura hexagonal sobre Java 21 y Spring Boot — separación estricta de capas domain, application e infrastructure, configuración de RabbitMQ para comunicación event-driven, y estándares técnicos documentados para escalar con múltiples equipos. Un punto que definiré desde el inicio: los módulos compartidos (excepciones, value objects, eventos de dominio) irán en un artefacto independiente versionado, evitando acoplamiento entre bounded contexts y facilitando que equipos futuros trabajen en paralelo sin romper contratos. Preguntas: 1) ¿El sistema será monolito modular o microservicios desde el inicio? 2) ¿Ya tienen definidos los bounded contexts principales o eso forma parte del entregable? Ready to start whenever you are. Kamran

@ZohaibRoy

⭐⭐⭐⭐⭐ Expert Backend Architect & Senior Java Developer with 10+ Years Experience ❇️ Hi My Friend, I hope you are doing well. I've reviewed your project needs and see you're looking for a Backend Architect or Senior Java Developer. You don’t need to look any further; Zohaib is here to help! My team has successfully completed 50+ similar projects in backend development. I will design and implement a robust backend architecture, ensuring it is scalable and maintainable while adhering to your technical standards. ➡️ Why Me? I can easily handle your project's requirements as I have over 10 years of experience in backend development, focusing on Java, Spring Boot, and software architecture. My expertise includes designing APIs, implementing DDD, and building scalable systems. I also have a strong grip on Docker, PostgreSQL, and RabbitMQ. ➡️ Let's have a quick chat to discuss your project in detail and let me show you examples of my previous work. I look forward to our conversation! ➡️ Skills & Experience: ✅ Java 21 ✅ Spring Boot ✅ JPA / Hibernate ✅ PostgreSQL ✅ Redis ✅ RabbitMQ ✅ Docker ✅ API Design ✅ DDD (Domain-Driven Design) ✅ Clean Architecture ✅ Event-Driven Architecture ✅ Software Documentation ✅ Code Quality Standards Waiting for your response! Best Regards, Zohaib

@softsolution2000

I have over 15 years of experience in Java and software architecture. I understand your need for a Senior Java Spring Boot Developer to design and build a solid, scalable, and maintainable backend architecture. I am confident in my ability to meet the required skills and deliver high-quality results. I am ready to discuss the project scope and adjust the budget accordingly. Let's connect to discuss further. Looking forward to the opportunity to work together. Thank you.

@kareemmaize

Hola, aqui la clave no es arrancar con controladores y entidades, sino construir una base que obligue al sistema a mantenerse sano cuando el equipo crezca. Un flujo real seria: se define el bounded context y sus reglas -> se crea el proyecto base con separacion estricta entre domain, application e infrastructure -> se exponen APIs bajo contratos claros -> persistencia, mensajeria y cache quedan desacopladas -> cada cambio entra por Pull Request con tests y SonarCloud -> el equipo puede agregar nuevos modulos sin romper la arquitectura. Esa base es la que realmente determina si el sistema va a escalar bien. Este tipo de iniciativas suele verse correcto al principio, pero falla cuando la arquitectura existe solo en documentos y no en restricciones reales del codigo. Un problema real es que infraestructura o JPA terminen filtrandose al dominio y despues cada modulo nuevo hereda ese acoplamiento, asi que lo resolveria con una plantilla base ejecutable, reglas de dependencia, convenciones obligatorias y validacion continua en CI. The part to get right early is la frontera entre dominio, aplicacion e infraestructura, porque eso define tanto la mantenibilidad como la capacidad real de escalar con multiples equipos.

@corpmember29

SENIOR JAVA ARCHITECT (10+ YRS) — ENTERPRISE BACKEND FOUNDATION With 12+ years of backend engineering experience, including enterprise Java (Spring Boot), distributed systems, and architecture design, I specialize in building scalable, production-grade systems from the ground up. I have hands-on experience defining system foundations using DDD, Clean Architecture, and Hexagonal Architecture in high-load environments. How I will approach your project: • Design full backend architecture using DDD + Hexagonal principles • Define strict module separation: domain / application / infrastructure • Build a standardized Spring Boot base project structure for all teams • Implement secure, scalable REST APIs with performance-first design • Set up event-driven architecture (RabbitMQ) where needed • Integrate PostgreSQL + Redis caching strategy for scalability • Establish CI/CD standards with GitHub PR workflow + SonarCloud quality gates • Enforce testing strategy and coding standards across the system Core Deliverables: • Clean, production-ready backend architecture (Java 21 + Spring Boot) • Reusable base project templates • Documented architecture + engineering guidelines • Scalable API framework ready for multi-team development • Fully tested and Sonar-compliant codebase

@Herculesz

Hi I’m a senior backend developer with strong experience designing scalable systems with Java and Spring Boot, applying DDD and hexagonal architecture in real-world projects, so this role aligns well with my background. The main challenge here is not writing features, but establishing a solid architectural foundation that enforces boundaries, scalability, and long-term maintainability across multiple teams. I approach this by structuring clear domain, application, and infrastructure layers, defining strict coding and repository standards, and building base projects that enforce these rules through design rather than documentation alone. I’ve worked on systems with PostgreSQL, Redis, RabbitMQ, and Docker, where performance, concurrency, and clean API design were critical from day one. My focus would be to deliver a production-grade foundation: well-structured base services, clear architectural guidelines, testable code, and quality enforcement via tools like SonarCloud and PR workflows. I’m comfortable operating in high-demand environments with strict review processes, and I prioritize clean, justified decisions over quick delivery. I can take ownership of the technical direction and ensure the backend is ready to scale with confidence. Thanks, Hercules

@teodorgeorge

Hola, me encantaría colaborar en la definición completa de la arquitectura backend que necesitan, creando una base sólida y profesional desde cero usando Java 21, Spring Boot y un enfoque claro en DDD y arquitectura hexagonal. Tengo experiencia real liderando plataformas complejas y diseñando estructuras escalables con estándares estrictos como los que describen. Puedo aportar criterios técnicos sólidos, código limpio y bases listas para equipos múltiples, asegurando mantenibilidad, testabilidad y calidad desde el inicio. Estoy listo para asumir un rol de alto impacto y construir sus proyectos base con la exigencia que requieren. Thanks, Teo

@mohjib092

Hola! Arquitecto Backend Senior (Java, DDD, Hexagonal) con +10 años construyendo sistemas complejos y escalables desde cero; puedo diseñar y entregar una base sólida, limpia y lista para escalar con estándares enterprise. Propuesta: entrega de V1 (arquitectura + proyectos base + estándares) en 10–14 días por $1,200 — listo para revisión técnica y ajustes iterativos.

@toriquldev123

At Toriqul Global Solutions, we transform ideas into high-performing digital products. We are a professional web development agency led by Engineer Md. Toriqul Islam brings over a decade of expertise in designing and developing websites, applications, and custom digital solutions. What We Deliver: ✔ Stunning modern websites ✔ Powerful custom web applications ✔ Mobile apps for Android & iOS ✔ E-commerce platforms ✔ Business automation systems ✔ SEO-friendly and fast-loading websites Our Tech Stack: React, Node.js, Laravel, PHP, WordPress, Python, .NET, MySQL, MongoDB, React Native, Bootstrap, JavaScript, and more. Why Clients Trust Us: • Business-focused solutions • Clean UI/UX design • Secure & scalable systems • Reliable deadlines • Transparent communication • Excellent after-sales support We don’t just build websites, we build results. Let’s create something amazing together. Best Regards, Toriqul Global Solutions

@Tanmoy236

Hello! Como arquitecto backend con más de 9 años de experiencia (cercano a 10) en Java, Spring Boot y arquitectura hexagonal/DDD, diseñaré e implementaré desde cero los proyectos base de tu sistema complejo, definiendo estándares técnicos obligatorios y una base escalable para múltiples equipos. Here's how I can help: - Diseñar arquitectura con DDD + hexagonal: separación estricta de capas (domain, application, infrastructure) - Construir proyectos base con Java 21, Spring Boot, JPA/Hibernate, PostgreSQL, Redis, RabbitMQ, Docker - Definir estándares de código, convenciones, repositorios, PR obligatorios y SonarCloud para calidad - Entregar código limpio, testeado, documentación C4/ADRs y configuración base lista para escalar Preguntas: ¿Dominios ya definidos o partimos desde modelado? ¿Monolito modular o microservicios desde inicio? ¿Cuántos equipos paralelos iniciales? Comparte requisitos y empiezo la arquitectura base en 7 días.

@vishal1145

Your architecture will fail if you don't define bounded contexts correctly from day one. I've seen DDD implementations collapse under their own complexity when domain boundaries aren't crystal clear before writing a single line of code. Quick question - are you planning separate databases per bounded context, or will you use schema-level separation within PostgreSQL? This decision impacts your event-driven strategy with RabbitMQ and determines whether you need saga orchestration or choreography for distributed transactions. Second - what's your expected write throughput for the event bus? If you're processing more than 5K events per second, RabbitMQ's default configuration won't handle it without clustering and proper queue topology design. Here's the architectural approach: - HEXAGONAL ARCHITECTURE + DDD: Build isolated bounded contexts with strict anti-corruption layers. Each module gets its own domain model, application services, and infrastructure adapters - zero cross-contamination between contexts. - SPRING BOOT + JAVA 21: Leverage virtual threads for I/O-bound operations and structured concurrency patterns. This reduces thread pool exhaustion under high load and simplifies async processing without reactive complexity. - POSTGRESQL + REDIS: Implement write-through caching with Redis for hot data paths and use PostgreSQL's LISTEN/NOTIFY for real-time updates. Add connection pooling with HikariCP tuned for your expected concurrent user load. - RABBITMQ EVENT-DRIVEN: Design idempotent event handlers with dead letter queues for poison messages. Implement outbox pattern to guarantee event publishing even during database transaction failures. - SONARCLOUD + PR WORKFLOW: Enforce quality gates blocking merges below 80% coverage and zero critical vulnerabilities. Configure branch protection requiring 2 approvals and passing CI before any code reaches main. I've architected 4 enterprise systems using hexagonal DDD patterns that scaled from 0 to 500K daily active users without architectural rewrites. I don't build prototypes - I build foundations that survive 3 years of feature additions without turning into legacy code. Let's schedule a 20-minute technical call to discuss your domain model and event flow before I commit to the engagement. I need to understand your business invariants and consistency requirements.

@belotefreelancer

"I have gone through your description. "This is my area of specialization, i can get it done 100 % perfectly well. Please ping me in person. I can help you to complete all tasks. I have hands-on experience in this field. We have already done similar types of projects. Connect with us for more details. Rest assured your satisfaction is guaranteed." Looking forward to your response." Thank you for your time

@digilogies

As a senior Java developer specialized in architecting complex backend systems, I bring over a decade of experience to the table. I have not only designed and developed large-scale systems from scratch, but I have also defined robust technical standards that have enabled efficient work across multiple teams. My fluency in DDD, Hexagonal Architecture, and Clean Architecture are especially suitable for this project's requirement. My proficiency in Java 21 with Spring Boot, JPA/Hibernate, PostgreSQL, Redis, RabbitMQ, Docker, SonarCloud, and GitHub aligns perfectly with your project stack. Furthermore, I prioritize code quality through tests, SonarCloud adherence, and architectural compliance - precisely what you expect for this role. Moreover, my ability to take high-level technical decisions and anticipate problems also ensure efficient delivery. Working based on deliverables rather than hours allows me to focus on excellence and maintain a high level of quality which enforces my determination to drive your project to success. My previous clients appreciate my respect for deadlines and strict validation process ensuring that all aspects are confirmed before they are regarded as complete. With me, you can expect well-designed backend base projects, thoroughly documented architecture along with well defined technical standards that meets all metric of quality. Let's make your project a great success together!

@antonk52

As a highly seasoned professional with over a decade of backend development experience, I invite you to leverage my skills to architect, design, and develop the robust backend foundation your project requires. My extensive knowledge of Java and Spring Boot, particularly in building scalable and distributed systems, will be invaluable in ensuring the stability, security, and high-performance your project necessitates. The key part of this role centers around not just building software but making decisions at altime project scope and having that bird's eye about consequences. I can effectively decipher the specific needs of your project and design tailor-made solutions. To date, my recent senior-level roles highlighted my proficiency in deep architectural understanding and adherence to best practices such as DDD or hexagonal architecture. Additionally, my comfortability with RabbitMQ for event-driven architectures combined with experience in SonarCloud and Docker make for comprehensive end-to-end support. Being fluent in English doesn't only put me at an advantage in communicating project details but it extends to ensuring quality through bilingual code documentation. Through orderly Pull Request cycles facilitated by thorough code review analysis via SonarCloud, I uphold stringent project standards which is non-negotiable since any quality compromise could lead to undesirable technical fall downs. In conclusion, choosing me isn't solely electing coded solutions. It implies selecting an expert who can flawlessly create, develop and structure complex systems that can comply with enterprise-level standards. I welcome the challenge of anticipating any future issues based on current needs and devising strategic solutions to them. You don't have to sacrifice quality for anything; let's make these powerful structures right from inception!

@KanzahAfaqAhmad

Hi There, I am excited about your search for a Senior Java Developer / Backend Architect to design and develop a robust backend architecture for your complex system. With over 7 years of experience in backend development and a solid grasp of software architecture, I can implement Domain-Driven Design (DDD) and hexagonal architecture that meets your specifications. I am proficient in Java 21, Spring Boot, PostgreSQL, and other technologies relevant to your project. My experience in creating scalable and maintainable systems aligns with your project goals to establish a strong technical foundation. You can view my portfolio here: https://www.freelancer.com/u/KanzahAfaqAhmad I look forward to contributing to your project with a focus on quality and high technical standards. Thank you, Kanzah Afaq

@Jairo51019

With over a decade of experience in backend development and solid knowledge in advanced software architecture, I am confident that I am the best fit to be your Backend Architect and Senior Java Developer. I have a deep understanding of DDD, Clean Architecture, and Hexagonal Architecture, which will allow me to design and implement a solid and scalable backend architecture for your complex system. My proficiency in Java 21, Spring Boot, JPA/Hibernate, PostgreSQL, Redis, RabbitMQ, Docker, SonarCloud et al proves my expertise matches your technology stack needs. My past experience building base projects and internal frameworks signifies my capacity to create standardization across teams efficiently. I prioritize clean, testable code which aligns with your work standards of a pull request-based development environment with strict architectural compliance. I am excited about constructing from scratch the foundational elements of your systems and establishing the necessary technical baseline for smooth scalability and maintainability. Let's turn your vision into a seamless reality together!

@Zawiya3

With over a decade of backend development under my belt, including extensive experience with Java and Spring Boot, I am more than adept at designing and implementing robust, scalable, and maintainable backend architectures, making me the perfect fit for your project. My thorough understanding and application of DDD, Clean Architecture, or hexagonal architecture ensure a strict separation of layers, sophisticated APIs, and accessibility for high-demand scenarios. Moreover, I bring valuable skills in API design, concurrency, performance as well as a keen eye for detail and structured coding with strict quality standards as exemplified by my familiarity with SonarCloud. My work method aligns perfectly with your project expectations: driven by strict metrics and high-quality deliverables rather than hours logged. Given my autonomous yet result-oriented approach to work - demonstrated on platforms like GitHub's Pull Requests - I'm confident in my ability to meet your needs while making the whole process secure.