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Java Developer and backend engineer specializing in Spring Boot, REST API development, and AI integration — building production-grade systems that solve real business problems, not just pass code review. I am a Java developer with hands-on experience delivering full backend systems independently — from architecture through deployment. Every system I ship is production-ready, properly secured, and documented. What I deliver as your Java developer: ▸ Spring Boot REST APIs — Java backend systems with 60+ endpoints, multi-role JWT security, Redis caching, and WebSocket real-time features. Clean layered architecture, JUnit 5 tested, OpenAPI documented. Built for teams to maintain, not just for demos. ▸ AI Integration — Java developer with Spring AI and OpenAI GPT integration experience. My project Famlytica AI is a 13-module Spring Boot platform with cross-module AI context architecture — awarded 2nd place at a national competition evaluated by PhD faculty with a cash prize. ▸ Machine Learning — IBM-certified Java developer with Python ML skills. I clean, analyze, visualize, and train models with Scikit-learn. Deployed a live ML-powered business intelligence dashboard processing 128,000+ real transactions. ▸ Payment Systems — Java backend developer with full Chapa payment lifecycle integration including HMAC-SHA256 webhook verification and real production money flows. Built for security, not just happy-path demos. ▸ Full-Stack Delivery — Java developer who can build React 19 frontends when your project needs end-to-end delivery, not just a backend handed off to another team. I run a live e-commerce platform (habeshamarket.store) and have delivered backend systems actively used by real businesses. I respond within a few hours and deliver what I commit to. If you need a Java developer who builds backend systems right the first time — let us talk. Java Developer · Spring Boot Developer · Backend Developer · Java Backend Developer · REST API Developer · Spring Security · Spring AI · OpenAI Integration · JWT Authentication · Redis · PostgreSQL · MySQL · Hibernate · Docker · AWS · WebSocket · Microservices · API Development · Machine Learning · Python · React · Full-Stack Developer · Spring Framework · Software Architecture

I'm Backend Developer specializing in Java Spring Boot,Golang and Node.js additional Automation and AI Integration with Microservices architecture. I design and build scalable, secure backend services and APIs for fintech, banking,, research, and enterprise platforms using Java,Golang , Node.js, SQL, and AWS. I bring 4+ Years of hands-on experience delivering production-grade backend systems, high-performance microservices, event-driven architectures, and high-availability REST APIs. My work spans market intelligence platforms, core banking and payment integrations, multi-telco USSD applications , AI-powered backend pipelines and n8n specialist. 🔑 Core Focus: Backend Development • Java Developer • Spring Boot Microservices • Golang Backend • Node.js Backend • REST API Development • AWS Backend • Fintech Systems 💼 Backend & Microservices Expertise • Java Developer (Spring Boot, REST APIs, Microservices) • Distributed systems and event-driven architecture • Backend system design for fintech, banking, and enterprise platforms • Secure authentication and authorization (OAuth2, JWT, Keycloak) • Complex API integrations (banking, telecom, payment systems) • Frontend: React, Nextjs and Svelte, Tailwind CSS, Vite... ⚙️ Cloud, DevOps & Reliability • AWS (ECS/Fargate, SQS, S3, EC2, ECR) • Docker and Kubernetes • CI/CD pipelines (GitHub Actions, Jenkins, Bitbucket Pipelines) • Monitoring and reliability engineering (Prometheus, Grafana, SLO/SLI) 🤖 AI & Data Processing (Backend-Focused) • AI-powered compliance and data-processing pipelines • Vector search using PostgreSQL (pgvector) • Prompt-based rule engines and OpenAI-compatible API integrations 🗄 Databases & Messaging • SQL: MySQL, PostgreSQL, SQL Server • NoSQL: MongoDB • Messaging: Kafka, ActiveMq, AWS SQS • Automation: n8n -Also Have Frontend Experience in React ,Nextjs and Svelte 5 I actively work as a Backend Developer on Java Spring Boot microservices ,Golang and Node.js APIs, and partner with clients who value clean architecture, scalable systems, clear communication, and fast, reliable delivery.

**Java Spring Boot Developer | AI Automation Engineer | n8n | LLM Integration | React & Angular** I build production-grade **Java/Spring Boot applications, AI automations, n8n workflows, LLM integrations, APIs, and full-stack web applications**. I help startups and businesses build new systems, automate manual processes, integrate AI, or rescue existing codebases. I'm Abel, a full-stack software engineer with 5 years of experience building production systems — from government justice platforms to real-time tax risk systems processing live data through Kafka. ### WHAT I CAN BUILD ✔ **Java & Spring Boot Development** * REST APIs and backend systems * Spring Boot microservices * Spring Security, JWT, OAuth2 & Keycloak * PostgreSQL, MySQL & database design * Kafka and event-driven architecture * Backend optimization and troubleshooting ✔ **AI Automation & n8n** * n8n workflow automation * AI-powered business workflows * LLM integrations * OpenAI and AI API integrations * AI agents and tool calling * Automated data processing * CRM, email, Slack and third-party API automation * Document and content automation * Connecting AI with existing business systems ✔ **Full-Stack Development** * React * Angular * TypeScript * Node.js * Tailwind CSS * REST API integration ✔ **Microservices & Integration** * Java/Spring Boot microservices * Kafka * REST APIs * Third-party API integrations * Event-driven systems * Service-to-service communication ✔ **DevOps & Production** * Docker * Kubernetes * GitHub Actions * Grafana * Loki * Monitoring and troubleshooting ### I CAN HELP YOU WITH → Building a new Spring Boot backend → Developing or fixing REST APIs → Building Java microservices → Integrating AI/LLMs into an existing application → Automating repetitive business processes with n8n → Connecting multiple APIs and business systems → Building AI-powered workflows and agents → Developing React/Angular frontends → Fixing authentication, JWT, OAuth2 and Keycloak issues → Debugging and rescuing existing applications → Deploying applications with Docker/Kubernetes ### WHY CLIENTS WORK WITH ME I don't just write code that works locally. I focus on **maintainable architecture, reliable integrations, security, documentation and production stability**. I've worked on systems involving real users, real transactions and real operational requirements — including government platforms and event-driven systems using Kafka. If you need a **Java/Spring Boot developer, AI automation engineer, n8n expert, LLM integration developer, or full-stack engineer**, send me your requirements and I'll help you turn them into a working system.

Database DevOps Engineer | CI/CD & ETL Automation I am a Database DevOps Engineer specializing in the automation of mission-critical data environments. I bridge the gap between Infrastructure and Data by implementing CI/CD for Databases, building high-performance ETL pipelines, and managing enterprise-grade Oracle PL/SQL stacks. I transform manual database operations into version-controlled, automated workflows. ✔️ Technical Stack Database DevOps (DataOps): Automating schema migrations using Liquibase/Flyway via GitHub Actions & Jenkins. Infrastructure as Code: Provisioning and scaling database environments with Terraform & Ansible. ETL & Data Engineering: Designing high-volume data pipelines; expert SQL & PL/SQL performance tuning. Cloud & Containers: Scaling stateful workloads using Docker & Kubernetes. Observability: Monitoring pipeline health and DB performance via Prometheus, Grafana, & ELK. ✔️ Enterprise Experience (Safaricom Telecom) Managed high-availability infrastructure for MPESA and core BSS/CRM systems. Automated real-time transaction monitoring and anomaly detection using Python & Bash. Ensured 99.99% uptime for mission-critical API services and database clusters. ✔️ Why Hire Me? Speed: I eliminate the "Database Bottleneck" by automating SQL deployments. Reliability: I treat DB changes as code—tested, versioned, and repeatable. Optimization: I write high-efficiency PL/SQL to reduce compute costs and latency.

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 am a dedicated software developer with strong programming and problem-solving skills. My goal is to deliver top-notch service on every project, ensuring your satisfaction and success. My Specialties: ⭐️ Understanding Client Needs: Excellent comprehension of customer requirements and business logic to deliver tailored solutions. ⭐️ Problem-Solving: Skilled in writing clean, readable, and maintainable code to effectively solve complex problems. ⭐️ Collaboration: A team player with strong communication skills, ensuring smooth project collaboration. ⭐️ Versatility: Expertise in both backend development and Android app development. Technologies I Am Proficient In: 🚀 Languages: HTML, CSS, JavaScript, TypeScript, Dart, PHP 🚀 Frameworks and Libraries: Svelte, Vue.js, Nuxt.js, NestJS, Laravel, Flutter Let's work together to turn your ideas into reality with high-quality, reliable software solutions. Reach out to discuss how I can help your project succeed!