I am a seasoned software developer with over 10 years of experience specializing in Backend and Full-Stack development. I pride myself on my excellent problem-solving skills and have a strong passion for writing clean and testable code. Clear communication is one of my strengths, making me a valuable team member in any software development project. Preferred Tech Stack: Backend: Java, Spring Boot, Thymeleaf, REST API, PostgreSQL, AWS, Linux, Tomcat, Nginx Frontend (Web): HTML, CSS, Sass, Javascript Frontend (Mobile): Flutter, Dart Cross-Platform: Flutter, Dart I am also proficient in the following technologies: Languages: Java, Scala, Groovy, Kotlin, Golang, JavaScript, TypeScript, Python, Dart, SQL Databases: PostgreSQL, MySQL, Oracle, Cassandra, MongoDB, SQLite, Neo4j Frameworks (Backend): Spring Boot, Spring Security, OpenAPI, Kafka, Zookeeper, Grails Frameworks (Frontend): Angular, React, Flutter, jQuery, Bootstrap Security: Spring Security, OAuth, JWT Technologies: HTML, CSS, JSON, XML, REST API API: REST API, OpenAPI, Swagger Messaging: Kafka, ActiveMQ, RabbitMQ Search: ElasticSearch, Lucene, Kibana Logging: ElasticSearch, Logstash, Kibana Cloud Providers: AWS, Google Cloud Testing: JUnit, Mockito, TestNG, Selenium, Cucumber, Katalon Studio Development Tools: Intellij IDEA, VSCode, Android Studio

I am a Senior Backend Engineer with 5+ years of experience building mission-critical, production-grade systems. I specialize in backend architectures where correctness, auditability, and data integrity are non-negotiable. I don’t just write code; I take ownership of backend systems end-to-end, ensuring they are scalable, maintainable, and robust enough to handle real money and high-volume traffic. What I bring to your project: * Fintech & Payments: extensive experience building real-money systems, including banking integrations, crypto, payment gateways, and auditable ledgers. * High-Scale Systems: Delivered telecom solutions (SMS/USSD) processing 500K–1M messages per day. * Data-Intensive Architectures: Designed ingestion pipelines for market intelligence and integrated complex third-party APIs (Research, Travel, Data Providers, Telecom). * Reliability: I prioritize clean architecture and testable code to ensure uptime and data accuracy. Technical Stack: * Languages: Node.js, Nest.js, Java (Spring Boot) * Database: PostgreSQL, SQL, Complex Query Optimization * Infrastructure: AWS, Docker, Microservices, terraform, kubernetes * Messaging/Event-Driven: AWS SQS, Kafka, RabbitMQ If you need a reliable partner to build a secure, high-performance backend, let’s connect.

Over 15 years of experience as a software developer, with a strong background in Java and Angular. Proven track record of delivering high-quality web applications on time and within budget. Skilled in working collaboratively in fast-paced, team-oriented environments. Proficient in a variety of development tools, including, Visual Studio, IntelliJ, and Git. Utilize AI-assisted development tools such as OpenCode and ClaudeCode to expedite coding and enhance efficiency. Tech Stack: ✅ Java ✅ Springboot ✅ Angular ✅ React Native ✅ Postgres / Mysql ✅ Typescript ✅ Unit testing / TDD / Spock / JUnit / Jasmine ✅ HTML ✅ CSS ✅ Git ✅ Open Code, Claude Code I can: ✅ Create custom complex websites ✅ Make mobile apps ✅ Automate boring tasks ✅ Create scripts for everyday use ✅ Optimize slow queries

13+ years experienced in Java/J2EE | AWS Certified(SAA , DVA, CloudOps) | Java Professional Certified | Docker | Kubernetes | Rest API | OPENAPI| Spring boot| JPA | Oracle | Mysql | Process Mining | AI | Langchain | Langgraph | RAG | MCP | OpenAI | React Js| ZK | EJB Certified | 7 years in Financial or Banking application | Agile/Scrum | Lead Team.

Alfresco Expert | Full-stack Developer (Angular+SpringBoot) | 12+ yrs exp in ECM, BPMN, Java Highly experienced Alfresco Developer and Full-stack Developer with 12+ years of expertise in Enterprise Content Management (ECM), Business Process Management (BPMN), and Java development. Skilled in SpringBoot, Angular2+, and RESTful web services. *Key Expertise:* - Alfresco Content Service and Alfresco Process Service - SpringBoot, Spring MVC, Spring REST - Angular2+, Angular - Java, JavaScript - RESTful web services - Enterprise Content Management (ECM), Business Process Management (BPMN) - Full-stack development (Angular+SpringBoot) *Technical Skills:* - Alfresco ECM, BPMN - Java, Spring, Hibernate, Maven - SpringBoot, Spring MVC, Spring REST - Angular2+, Angular - RESTful web services - JavaScript, HTML/CSS - Database: MySQL, Oracle, MongoDB *What I Offer:* - Custom Alfresco development and integration - Full-stack development using Angular and SpringBoot - RESTful web service implementation - ECM and BPMN solutions - Scalable and efficient software development *Why Hire Me:* - 12+ years of experience in Alfresco development and Java - Proven track record of delivering successful projects - Strong technical expertise and problem-solving skills - Excellent communication and collaboration skills - Adaptable and flexible with changing project requirements

I am a Java Backend Engineer specializing in designing and delivering scalable, secure, and high-performance enterprise applications. My core expertise includes Spring Boot, microservices, REST API design, multi-tenant architectures, and containerized deployments using Docker. I focus on building backend systems that are robust, maintainable, and optimized for long-term growth. 𝗜𝗻𝗱𝘂𝘀𝘁𝗿𝘆 & 𝗗𝗼𝗺𝗮𝗶𝗻 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 I work across full-stack environments where backend performance and architectural integrity are critical. My experience spans SaaS platforms, enterprise systems, and healthcare software particularly LIMS/LIS solutions and interoperability standards such as FHIR and HL7. This domain expertise enables me to build reliable, compliant, and integration-ready systems used in diagnostics and clinical workflows. 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴 𝗔𝗽𝗽𝗿𝗼𝗮𝗰𝗵 My professional approach emphasizes clean architecture, automation, database optimization, distributed system design, and cloud-ready development practices. I translate complex business requirements into technical solutions that are production-ready, well-structured, and aligned with strategic product goals. 𝗖𝗼𝗿𝗲 𝗧𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗦𝗸𝗶𝗹𝗹𝘀 Java, Spring Boot, Microservices, REST APIs Angular, React.js PostgreSQL, MySQL Docker, Nginx, Traefik, AWS, DigitalOcean Healthcare IT: FHIR, HL7, LIMS/LIS architectures System design, integration patterns, multi-tenant systems 𝗖𝗼𝗹𝗹𝗮𝗯𝗼𝗿𝗮𝘁𝗶𝗼𝗻 & 𝗗𝗲𝗹𝗶𝘃𝗲𝗿𝘆 I collaborate effectively with product managers, QA teams, and engineering stakeholders to deliver solutions that scale with organizational needs. If you are building healthcare platforms, enterprise software, or cloud-native applications, I bring the technical depth and execution discipline to deliver meaningful impact.

Hi, my name is Chirag Patel and I'm working as a full-stack developer. I have more than 10 years of experience in developing enterprise portals. I'm having experience in both the frontend and backend. ​I have experience in software design, software development, and software testing using Java technology. I have worked on projects in various sectors like Insurance, Health, Logistics, E-commerce, Utility, etc. Below are the backend and front end skills I have but it is not limited to this only : Backend : - Worked on the frameworks - Spring, Hibernate, Spring Boot, JSF, Primefaces. - Rest and Soap API development - Experienced in microservices development - Extensive experience in Liferay Portal Development with versions 7.x DXP, 6.x. - Expertise in object-oriented analysis, design principles, and various J2EE design concepts. - Strong experience in Apache tomcat webserver - Hands-on ant, maven, gulp, and Gradle build tools. - Experienced in application deployment and performance tuning. - Worked on writing unit tests, integration tests, selenium tests etc. - Experience with containerization technologies like Docker and orchestration tools like Kubernetes. - Familiar with Unix and scripting languages - Experience to use the OAuth mechanism for User Authorization - Expertise in third party plugin/app integrations - Experience with AWS cloud technology i.e. EC2, RDS, ElastiCache, etc.. - Familiarity with DevOps practices and tools for CI/CD. - Familiar with the deployment cycle, and manage multiple environments builds. - Hand on experience to communicate with business stakeholders to understand long & short-term business needs. Frontend : - Expertise in Html, CSS, JS, jQuery, Bootstrap, velocity, Freemarker. - Experience creating good architecture in ReactJS - React Js - React hook - Redux - Functional components - Material UI Database - Postgres, Mysql, Oracle, MariaDB, No Sql - MongoDB Project Management and Code version - Hands-on SVN, GITHUB, BITBUCKET, Jira, Confluence, etc.. - Experience in a Self-organized, Agile, Test Driven Environment Let's connect to discuss this in detail. Thank you

ᴛᴏᴘ ʀᴀᴛᴇᴅ ᴘʟᴜꜱ ᴜᴘᴡᴏʀᴋ ᴄᴏɴᴛʀᴀᴄᴛᴏʀ. ✅ AVAILABLE FOR NEW PROJECTS I'm a full-stack developer and long-term technical partner. I specialize in Java (Spring Boot) backends and modern React.js/Next.js/Tailwind frontends. I focus on clean architecture, performance, and systems that don’t break as you scale. Using tools like Kafka, Redis, and message-based architectures, I help decouple services, improve performance, and eliminate bottlenecks caused by tightly coupled APIs. This approach is especially useful for real-time features, background processing, and systems where consistency and responsiveness both matter. I’ve worked on everything from microservices and real-time apps to AI-integrated platforms and custom tools. I don’t just ship features, I help you make the right technical decisions so your product stays maintainable long-term. What I bring to your project: - Full-Stack Development, including frontend and backend - Using Java, Spring Boot - both microservices and monolith architecture - React.js/Next.js, Tailwind CSS for the frontend (including any other packages or component libraries such as shadcn or MUI) - MongoDB, MySQL, PostgreSQL, Redis - used for database and caching layer - API Design & Integration - Linux, Docker, CI/CD Pipelines - Discord Bots (JDA) - building discord bots using java discord API Go-to stack: Java (Spring Boot), React.js/Next.js, Tailwind CSS, PostgreSQL/MongoDB, Redis, Docker, Nginx I take ownership, communicate clearly, and move fast without sacrificing quality. If you’re looking for someone reliable who can build, improve, and scale your product, I’m here to help.

Greetings! I'm Gutu Daniel Geleta, a Full Stack Developer with deep expertise in Java-based backend systems and scalable web applications. With experience across fintech, edtech, and e-commerce, I bring a problem-solving mindset and real-world experience in delivering secure, high-performance, and microservice-oriented architectures. I currently serve as a Software Engineer at Dengene Technology Solution (USA-based), where I work with Java, Spring Boot, and Kafka to build robust microservices and event-driven systems in fast-paced environments. I’ve also contributed to platforms like AddisFinancial, automating complex processes and enhancing system performance. 🌟 Certifications & Training 🌟 Verified Certifications (Credly / Official Providers) 🏅 Prompt Design in Vertex AI – Skill Badge  • Provider: Google Cloud  • Issued: November 2025 🏅 Implement Load Balancing on Compute Engine – Skill Badge  • Provider: Google Cloud  • Issued: November 2025 🏅 Google IT Support Professional Certificate (v2)  • Provider: Coursera  • Issued: December 2023 🏅 Tools for Data Science  • Provider: IBM  • Issued: June 2022 Additional Certifications & Courses 🏅 Spring Boot – Amigoscode  • Issued: July 2022 🏅 Java Programming Masterclass for Software Developers – Udemy  • Issued: May 2021 🏅 Full Stack Software Engineering – ALX 🏅 Java – HackerRank 🏅 Spring Boot & Spring Security – Amigoscode 🏅 Frontend Development – Johns Hopkins University (Coursera) 🌟 My Specializations 🌟 ✅ Java (8, 17+), Spring Boot, Spring Security, Spring Data ✅ Microservices, Kafka, RESTful API Design ✅ Domain-Driven Design (DDD), Hexagonal Architecture, Clean Architecture ✅ React.js, Next.js, TypeScript, Tailwind CSS ✅ Databases: PostgreSQL, MySQL, MongoDB ✅ Authentication: JWT, OAuth2, Role-Based Access Control ✅ Testing: JUnit, Mockito, Integration Testing ✅ CI/CD & DevOps Basics: Git, GitHub, Docker ✅ Cloud Platforms: AWS, DigitalOcean ✅ Agile Development, Clean Code, Performance Optimization Notable Projects & Contributions 🔹 Addis Wealth Management System – Scalable fintech platform built with Java, Spring Boot, and React. 🔹 Automated Exam Repository System – AI-powered exam parser with PDF/DOCX ingestion and dynamic question rendering. 🔹 Exam Version Generator – A tool for creating multiple randomized versions of exams with a live preview. 🔹 E-Commerce Platform (SportGoods) – Full-stack app with secure login, cart, and payment integration. 🔹 Task Management System – Java + MySQL app with full CRUD, user roles, and CSRF protection. 🔹 Full Stack Mentorship – Ongoing freelance mentorship for junior developers in React, Node.js, and backend fundamentals. 🎓 Education • BSc in Computer Science – Mattu University (2024) • ALX Full Stack Software Engineering Graduate Whether you're looking to architect a robust backend, launch a reliable frontend, or integrate a secure API layer, I’d love to collaborate and build something impactful with you. Let’s connect and make your vision a reality. 📌 Portfolio: my-portifolio-gutu.netlify.app 📌 Linkedn: linkedin.com/in/gutu-daniel

I build backend systems that work the first time and keep working after I leave. My last client hired me twice. The first time to build a custom eSign platform from scratch. The second time — three months later — to extend it, because the original architecture was clean enough to grow without rewriting. That's the kind of software I build. 10 years of enterprise backend development. I've built: → A loan processing engine for a banking platform — retail and corporate lending workflows, credit decisioning APIs, multi-stage approval pipelines → A custom eSign web application — full design and development, then seamless feature expansion for a returning client → A serverless inventory management system on AWS (Lambda + DynamoDB + API Gateway + Cognito) → Clinical documentation systems handling care gap detection across 31 medical categories I specialize in the kind of backend work where getting it wrong is expensive: financial services, healthcare, compliance-heavy domains. Systems where you need someone who thinks about edge cases before they become production incidents. Tech stack: Java 8/11/17 · Spring Boot · Spring Security · Spring Batch · Spring Data JPA · Hibernate · PostgreSQL · MySQL · Oracle · DynamoDB · Apache Kafka · Docker · REST APIs · AWS (Lambda, EC2, ECS, S3, Step Functions, API Gateway) · OAuth 2.0 · JWT · CI/CD (Jenkins, SonarQube) · 90%+ test coverage (JUnit 5, Mockito) 100% Job Success. Every project delivered on scope. Every client rated me 5 stars on communication and quality. Based in Colombia (EST-aligned). Fluent English and Spanish. Available 30+ hrs/week. I respond within hours, not days. Looking for a Java backend developer, Spring Boot specialist, or AWS microservices engineer? Let's talk about your project.