Hire the Best Apache Kafka Developers

Software engineer, Linux enthusiast - Leading tech decisions, architecture design; - Multi-model AI orchestration: OpenAI (GPT), Perplexity (Sonar-Pro), Google Gemini; function-calling agents with massive context - Real-time WebSocket infrastructure; Socket-io with Redis adapter for horizontal scaling - AWS-native architecture: ECS Fargate, Lambda, S3, SQS, EventBridge, CloudFront, Cognito - Infrastructure as Code; Terraform, GitHub Actions CI/CD, zero-downtime deployments - High-load API development; NestJS, Node.js, TypeScript - PostgreSQL (Prisma ORM), Redis/ElastiCache

🚀 𝗦𝗲𝗻𝗶𝗼𝗿 𝗣𝘆𝘁𝗵𝗼𝗻 & 𝗡𝗼𝗱𝗲.𝗷𝘀 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 | 𝗚𝗲𝗻𝗲𝗿𝗮𝘁𝗶𝘃𝗲 𝗔𝗜 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿 | 𝗙𝗮𝘀𝘁𝗔𝗣𝗜 | 𝗟𝗟𝗠 | 𝗥𝗔𝗚 | 𝗔𝗜 𝗔𝗴𝗲𝗻𝘁𝘀 Hi, I’m Basant, a 𝗦𝗲𝗻𝗶𝗼𝗿 𝗦𝗼𝗳𝘁𝘄𝗮𝗿𝗲 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿 and 𝗚𝗲𝗻𝗲𝗿𝗮𝘁𝗶𝘃𝗲 𝗔𝗜 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 with 𝟭𝟬+ 𝘆𝗲𝗮𝗿𝘀 𝗼𝗳 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 building scalable backend systems, SaaS platforms, APIs, automation solutions, full-stack applications, and AI-powered products. I specialize in 𝗣𝘆𝘁𝗵𝗼𝗻, 𝗙𝗮𝘀𝘁𝗔𝗣𝗜, 𝗡𝗼𝗱𝗲.𝗷𝘀, 𝗧𝘆𝗽𝗲𝗦𝗰𝗿𝗶𝗽𝘁, 𝗡𝗲𝘅𝘁.𝗷𝘀, 𝗣𝗼𝘀𝘁𝗴𝗿𝗲𝗦𝗤𝗟, 𝗔𝗪𝗦, 𝗮𝗻𝗱 𝗚𝗲𝗻𝗲𝗿𝗮𝘁𝗶𝘃𝗲 𝗔𝗜, helping businesses turn ideas into secure, scalable, production-ready applications. I can help you build a new AI product, integrate AI into an existing application, develop scalable APIs, modernize your backend, or automate business workflows using LLMs and AI Agents. 🧠 𝗚𝗲𝗻𝗲𝗿𝗮𝘁𝗶𝘃𝗲 𝗔𝗜 & 𝗟𝗟𝗠 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 LLM application development AI chatbot development RAG-based applications Document Q&A systems PDF/document processing Prompt engineering Embeddings & semantic search Vector databases AI Agents Tool & function calling Database AI Agents Intelligent automation Structured LLM outputs LangChain & LangGraph OpenAI API integrations AI-powered business applications 🐍 𝗣𝘆𝘁𝗵𝗼𝗻 & 𝗙𝗮𝘀𝘁𝗔𝗣𝗜 Python FastAPI Pydantic SQLAlchemy 2.x Alembic PostgreSQL MySQL Redis REST API development Async programming WebSockets OAuth 2.0 & JWT RBAC API integrations Background processing Microservices Docker ⚡ 𝗡𝗼𝗱𝗲.𝗷𝘀 & 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 Node.js Express.js TypeScript React.js Next.js Redux REST APIs WebSockets Real-time applications Third-party API integrations ☁️ 𝗖𝗹𝗼𝘂𝗱, 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲 & 𝗗𝗲𝘃𝗢𝗽𝘀 AWS EC2 S3 Lambda CloudWatch Docker Nginx Kafka RabbitMQ Redis & caching CI/CD Microservices Distributed systems Event-driven architecture API performance optimization 🧩 𝗪𝗵𝗮𝘁 𝗜 𝗖𝗮𝗻 𝗕𝘂𝗶𝗹𝗱 ✅ AI-powered SaaS applications ✅ RAG knowledge assistants ✅ AI chatbots and custom AI assistants ✅ Document/PDF Q&A platforms ✅ AI Agents with database & API tools ✅ LLM-powered business automation ✅ AI-enabled enterprise applications ✅ FastAPI AI backends ✅ Node.js AI applications ✅ Next.js AI applications ✅ AI APIs and microservices ✅ Database AI Agents ✅ Real-time applications ✅ Existing application modernization with AI 🏗️ 𝗜𝗻𝗱𝘂𝘀𝘁𝗿𝘆 & 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 I have 10+ years of software engineering experience working on enterprise applications, SaaS platforms, analytics platforms, real-time systems, HRMS, payroll, ATS, fintech, logistics, travel, gaming, and business automation solutions. I don't just build AI prototypes. My focus is on building production-ready software with scalable architecture, clean APIs, secure authentication, database design, performance optimization, maintainable code, and cloud deployment. 📈 𝗪𝗵𝘆 𝗪𝗼𝗿𝗸 𝗪𝗶𝘁𝗵 𝗠𝗲? 10+ years of software engineering experience Strong Python + Node.js backend expertise FastAPI & REST API development Generative AI & LLM application development RAG & AI Agent development Strong React.js & Next.js experience PostgreSQL, MongoDB, MySQL & Redis Kafka & microservices AWS & Docker API integrations & automation End-to-end product development Experience modernizing existing applications Strong system design and architecture experience Technical leadership and team management experience 🤝 𝗟𝗲𝘁'𝘀 𝗕𝘂𝗶𝗹𝗱 𝗦𝗼𝗺𝗲𝘁𝗵𝗶𝗻𝗴 Whether you need a Python/FastAPI Developer, Node.js Developer, Full Stack Engineer, or Generative AI Developer, I can help you take your project from architecture → development → AI integration → testing → deployment. If you have an AI product idea, need to integrate an LLM into an existing application, want to build a RAG/AI Agent system, or need a scalable Python/Node.js backend, let's discuss your project. 𝗕𝗲𝘀𝘁 𝗿𝗲𝗴𝗮𝗿𝗱𝘀, 𝗕𝗮𝘀𝗮𝗻𝘁 𝗞𝘂𝗺𝗮𝗿 𝗦𝗶𝗻𝗴𝗵

Clients come to me for one of two things: building an enterprise-grade system the right way from the start, or rescuing an existing codebase fixing bugs, resolving integration issues, and shipping features other developers left unfinished. I'm Abel, a full-stack developer with 5 years building production systems — from a government justice case management platform to a real-time tax risk engine processing live data through Kafka. I pair Java/Spring Boot microservices with Angular or React frontends, and I turn messy requirements into stable, scalable products. WHAT I HELP WITH ✔ Enterprise & government systems — case management, revenue/tax platforms, complex backend-heavy applications ✔ Microservices & API integration — event-driven architecture, Kafka, REST APIs that hold up under real load ✔ SaaS & MVPs — end-to-end builds with Spring Boot + Angular/React ✔ Rescuing broken projects — messy auth, unstable APIs, half-finished features ✔ Auth & security — Keycloak, OAuth2, JWT done properly ✔ Deployment & monitoring — Docker, Kubernetes, Grafana, Loki MY STACK Backend: Java, Spring Boot, Kotlin, Node.js, Apache Kafka Frontend: Angular, React, TypeScript, Tailwind CSS Databases: PostgreSQL, Supabase DevOps: Docker, Kubernetes, Grafana, Loki, GitHub Actions Auth: Keycloak, OAuth2, JWT Clients tell me I bring enterprise-level discipline to fast-moving projects — clean architecture, clear documentation, and systems that hold up under real load. If your project involves real users, real transactions, or real consequences — let's talk. Send me a message with your project details or requirements, and let's bring your platform to life.

I'm a Full-Stack Java Developer with over 8+ years of industry experience. I excel in all aspects of Java application development, from design and development to deployment. I have a proven track record of building robust and Scalable applications across diverse domains. My Expertise Full-Stack Development: Java: Core Java, multithreading, OOP, Spring, Hibernate, Struts, J2EE. Frameworks & Libraries: Spring, Hibernate, JavaFX, Apache Struts. Microservices Architecture: Spring Cloud, Netflix OSS, service discovery, load balancing, tolerance mechanisms. Web Development: JSP, Servlets, RESTful APIs, Angular, React, HTML, CSS, JavaScript. Databases: MySQL, PostgreSQL, MongoDB, Redis. Testing & Debugging: JUnit, Mockito. I also use GitHub Copilot and Claude Code to deliver the best solutions. ✔ LLM integrations (OpenAI, Claude, etc.) ✔ AI-assisted workflow automation ✔ Prompt engineering & optimization ✔ RAG based enterprise search solutions ✔ AI code acceleration using tools like Cursor ✔ Designing AI-ready Microservices architecture Java Solution Architect: Designing scalable solutions with Java, Spring, Hibernate, and microservices. DevOps: Cloud setup, infrastructure management, CI/CD. Proficient in AWS (Lambda, EC2, S3, Redshift, SageMaker, Cognito) and GCP (VMs, Google cloud storage). Domain Experience: Insurance, finance, healthcare, e-learning, e-commerce, travel, real estate, logistics, supply chain, social networking, and education. CRM and ERP systems.

8+ years of experience and 1,000+ hours delivered. I design and scale end-to-end full-stack systems using Node.js, TypeScript, Go, and event-driven microservices (RabbitMQ, Redis, Docker). Core Expertise: - Architecture: Building production-ready, scalable solutions for high-traffic applications. - Integrations: Specialized in integrating global payment platforms (Stripe, Paypal, Ryftpay, GoCardless, and NMI) and Indonesian marketplaces Tokopedia, Tiktok Shop, Lazada, BliBli, Shopee, WooCommerce, Shopline, and Shopify). - Efficiency: Proven track record of improving engineering workflows and meeting demanding timelines. I translate business requirements into reliable technical solutions. Let’s discuss how I can help scale your next project.

Java & Spring Boot Architect | AI-Powered Backend Systems | 14+ Years Experience I am a Java & Spring Boot architect with 14+ years of hands-on experience building production-grade enterprise systems — from core banking platforms to AI-integrated microservices. I hold a BSc in Computer Science & Technology and now work as a dedicated full-time freelancer on Upwork, bringing the same rigour I applied in large fintech institutions directly to client projects. My core expertise spans Spring Boot, Spring Framework, and microservices architecture, with deep practical knowledge of SSO & Keycloak, Docker, DevOps pipelines, and GitLab CI/CD. I design systems that are secure, observable, and built to scale — whether that means integrating Kafka for event-driven flows, Flowable BPMN for workflow automation, or AWS for cloud infrastructure. Over the past year I have been heavily invested in the AI/LLM frontier: building Spring AI applications, wiring up MCP (Model Context Protocol) servers, running local models via Ollama, and implementing advanced patterns like tool calling, RAG pipelines, and AI agent workflows. I see AI not as a separate layer but as a first-class citizen inside enterprise Java backends. If you need someone who understands both the old-school reliability of enterprise Java and the new possibilities of AI-augmented architecture — let's talk. CORE STACK: Java · Spring Boot · Spring Framework · Microservices · REST API · Keycloak/SSO · Docker · GitLab CI/CD · DevOps · Kafka · Flowable BPMN · Oracle · PostgreSQL · AWS · Angular AI & EMERGING TECH: Spring AI · MCP · Ollama · Tool Calling · AI Agents · RAG Pipelines · pgvector · LLM Integration · OpenAI API · Prompt Engineering DOMAINS: Banking & Fintech · SWIFT/ISO 8583 · AML/CFT Compliance · NPSB/RTGS · ATM Switch · eKYC · Healthcare/EMR · Document Management