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Senior Backend Engineer | Node.js • NestJS • TypeScript I am a Senior Backend Engineer with over 6 years of experience building, scaling, and operating production systems across Fintech, E-commerce, and EdTech. I specialize in transforming complex business requirements into high-performance microservice architectures. 🚀 My Expertise Includes: - Architectural Leadership: Led the migration of a monolith to a 19-service microservices ecosystem. - Performance Engineering: Optimized queries and backend logic to reduce API latency by 90% (from 1s to 50-100ms). - Financial Systems: Engineered coin exchange services and VIP staking features for blockchain-based products. - Integration & Scaling: Proven track record of integrating complex 3rd party gateways (Xendit, SendGrid, Twilio) and banking partners. - Infrastructure & DevOps: Orchestrating deployments on Kubernetes (GKE), AWS, and Docker with zero-downtime strategies. 🛠 Technical Stack: - Languages: TypeScript, Node.js, Go, PHP. - Frameworks: NestJS (Expert), Express.js, Laravel, Echo. - Databases: PostgreSQL, MySQL, MongoDB, Redis. - Messaging: Kafka, RabbitMQ, gRPC, Event-Driven Architectures. 📊 Notable Achievements: - Reduced payment processing time by 75% for a major payment gateway. - Spearheaded the backend migration from AWS Amplify to a scalable NestJS architecture for a US-based AI platform. - Built a hotel management aggregator (Govesta) from the ground up, including full ERD design and system architecture. I thrive in remote, high-ownership environments and am committed to delivering clean, maintainable code that aligns with long-term business goals. Let’s build scalable solutions that help your business thrive!

Hi! I'm a professional Website/Software Developer from Indonesia with over 10 years of experience in web development — specializing in Laravel, Vue.js, and RESTful APIs. I’ve built a wide range of websites and applications for various industries using Laravel, WordPress, native PHP, and modern JavaScript frameworks like Vue.js, React.js, and Node.js. I write clean, maintainable code and follow the latest development standards. Communication is key in every project. I’m easy to reach, quick to respond, and always keep you updated on progress — no surprises. Skills & Technologies: ✔️ PHP | Laravel | WordPress ✔️ JavaScript | Vue.js | Nuxt.js | React.js | Node.js | Express.js ✔️ SQL | MySQL | SQLite ✔️ NoSQL | CouchDB ✔️ Python (Desktop Apps) ✔️ Android | Ionic | Capacitor | Cordova ✔️ HTML | CSS | Bootstrap ✔️ UI/UX Design Let’s build something great together!

As a versatile and experienced software developer, I specialize in building robust, scalable, and efficient applications using a diverse range of technologies. With a solid background in Golang, Node.js, FreePascal, Delphi, Java, and Angular, I am equipped to handle projects across various domains, from backend development to full-stack solutions. Key Skills: ** Golang: Expertise in building high-performance, concurrent applications and microservices with Go. Proven track record in developing efficient server-side solutions. ** Node.js: Extensive experience in developing scalable, real-time web applications using Node.js. Proficient in leveraging Express.js and other frameworks to create seamless RESTful APIs. ** FreePascal & Delphi: Skilled in legacy system maintenance and modernization. Adept at developing cross-platform applications with a focus on performance and reliability. ** Java: Strong background in building enterprise-level applications using Java. Experienced with Spring Framework, Hibernate, and other Java-based technologies. ** Angular: Proficient in creating dynamic, responsive, and user-friendly front-end applications with Angular. Skilled in integrating with backend services to deliver full-stack solutions. ** Kubernetes: Proficient in container orchestration with Kubernetes, enabling scalable and resilient application deployments. ** AWS & GCP: Experienced in leveraging cloud platforms like AWS and GCP for deploying, managing, and scaling applications. Knowledgeable in various cloud services and best practices for cloud-native development. What I Offer: Custom Solutions: Tailored software solutions that meet your specific business needs and objectives. Quality Code: High-quality, maintainable, and well-documented code following best practices and industry standards. Full Lifecycle Development: Comprehensive services from requirement analysis and design to implementation, testing, and deployment. Cloud Expertise: In-depth knowledge of cloud infrastructure, enabling efficient and scalable cloud deployments. Communication: Clear, prompt, and transparent communication throughout the project lifecycle to ensure alignment and satisfaction. Whether you're looking to develop a new application from scratch, enhance an existing system, or modernize your legacy software, I have the expertise and dedication to deliver exceptional results. Let's collaborate to turn your vision into reality!

Skills and Expertise: ✅ Proficient in writing complex queries and optimizing database (SQL and NoSQL) performance. ✅ Experienced in Programming Languages such as Golang, Python and NodeJs Database: ✅ SQL Databases: Postgres, MySQL, MSSQL, and SQLite. ✅ NoSQL Databases: MongoDB, Redis, Elasticsearch, and DynamoDB. Cloud Data Pipeline: ✅ Proficient in GCP services: Bigquery and Looker Studio for data storage and analysis. ✅ Experienced in AWS services: Step Function, Lambda Function, Athena, EC2, ECS, Glue, S3, Iceberg, Redshift, and EMR Data Stack: ✅ Big Data Tools: Proficient in Spark, Kafka, and Flink for handling large-scale data processing. ✅ DBT (Data Build Tool): Skilled in DBT for transforming and modeling data. ✅ Airflow: Experienced in using Apache Airflow for orchestrating data workflows. ✅ Containerization: Familiar with Docker and Kubernetes for containerization and orchestration. ✅ Version Control: Proficient in Git, Gitlab, and GitHub for collaborative development and version control. Web Scraping/Automation: ✅ Proficient in web scraping using Scrapy, BeautifulSoup, Selenium, and Playwright. I am dedicated to delivering high-quality data solutions and ensuring data accuracy and reliability. With my extensive skill set and experience, I am confident in my ability to tackle complex data engineering challenges and provide valuable insights to clients. If you're looking for a data engineer who can streamline your data processes, create efficient data pipelines, and turn your data into actionable insights, feel free to contact me. Let's discuss how I can help you achieve your data goals.

Hi, I’m Yulius — AI Engineer & Backend Specialist | 10+ Years Experience Building AI-Powered Products, Automation Systems & Scalable Platforms With over a decade of experience, I help businesses unlock real value from AI, automation, and backend engineering. My specialty is designing and building systems where AI doesn’t just assist — it integrates deeply into your product and workflows to help you save time, reduce costs, and open up entirely new capabilities. Whether you're a startup building your first AI feature or an enterprise modernizing operations, I deliver production-ready solutions that work reliably, scale efficiently, and create meaningful business outcomes. ------------------------------What I Build------------------------------ 1. AI Automation & AI-Powered Workflows -Conversational AI chatbots and intelligent agents using OpenAI, LangChain, LlamaIndex, HuggingFace -Voice AI workflows using Vapi, ElevenLabs, Twilio, Whisper, Google Speech-to-Text -Process automation and system integrations using Make.com, Zapier, n8n, and custom Python scripts -NLP pipelines: intelligent Q&A systems, document summarization, entity extraction, text classification, semantic search -AI-driven process automation for email, SMS, CRM, customer support, lead generation, onboarding, and more 2. Backend & API Development -High-performance REST and GraphQL APIs -Microservices architecture design -Secure and scalable data pipelines -Event-driven systems & asynchronous processing -Tech stack: Node.js, NestJS, Express, Python (FastAPI, Django, Flask) 3. Cloud Infrastructure & DevOps -Scalable cloud deployments using AWS, GCP, Docker, Kubernetes, Vercel -CI/CD pipelines, monitoring, observability -High-availability, cost-optimized infrastructure 4. Frontend Development (AI-Powered Interfaces) -Admin dashboards, monitoring panels, customer portals, analytics dashboards -Modern frontend frameworks: React, Next.js, Vue.js -AI-powered interfaces with real-time interactivity -------------------------------My Core Stack-------------------------- Backend: Node.js, NestJS, Express, Python (FastAPI, Django, Flask) Frontend: React, Next.js, Vue.js, React Native, Flutter Databases: PostgreSQL, MongoDB, MySQL, Redis Cloud: AWS, GCP, Docker, Kubernetes, Vercel AI Tooling: OpenAI, LangChain, LlamaIndex, HuggingFace, Vapi, ElevenLabs, Zapier, Make, n8n If you're looking for an engineer who understands both the business and technical side of AI-powered systems — and can deliver solutions that are both innovative and production-ready — I’d be happy to help.

Welcome! 👋 𝗛𝗶𝗴𝗵-𝗽𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲 𝗯𝗮𝗰𝗸𝗲𝗻𝗱𝘀 𝗮𝗿𝗲𝗻'𝘁 𝗷𝘂𝘀𝘁 𝗯𝘂𝗶𝗹𝘁; 𝘁𝗵𝗲𝘆 𝗮𝗿𝗲 𝗲𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗲𝗱 𝗳𝗼𝗿 𝗿𝗲𝗹𝗶𝗮𝗯𝗶𝗹𝗶𝘁𝘆 𝗮𝗻𝗱 𝘀𝗽𝗲𝗲𝗱. With 3+ years of experience, I specialize in building scalable, secure, and data-driven backend systems. My expertise bridges the gap between 𝗜𝗻𝗱𝘂𝘀𝘁𝗿𝗶𝗮𝗹 𝗜𝗼𝗧 (𝗠𝗼𝗱𝗯𝘂𝘀/𝗠𝗤𝗧𝗧/𝗦𝗡𝗠𝗣) and modern cloud architectures. Whether you need a real-time energy monitoring system or a secure API for a fast-growing startup, I deliver clean, production-ready code. 🚀 𝗧𝗵𝗲 𝗔𝗜-𝗘𝗻𝗵𝗮𝗻𝗰𝗲𝗱 𝗔𝗱𝘃𝗮𝗻𝘁𝗮𝗴𝗲 I leverage a modern, 𝗔𝗜-𝗽𝗼𝘄𝗲𝗿𝗲𝗱 𝘄𝗼𝗿𝗸𝗳𝗹𝗼𝘄 (𝗖𝗹𝗮𝘂𝗱𝗲, 𝗚𝗶𝘁𝗛𝘂𝗯 𝗖𝗼𝗽𝗶𝗹𝗼𝘁, 𝗔𝗻𝘁𝗶𝗴𝗿𝗮𝘃𝗶𝘁𝘆) to provide superior value to my clients: • 𝗙𝗮𝘀𝘁𝗲𝗿 𝗗𝗲𝗹𝗶𝘃𝗲𝗿𝘆: I can prototype and ship complex features 2x faster than traditional manual coding. • 𝗥𝗼𝗯𝘂𝘀𝘁 𝗤𝘂𝗮𝗹𝗶𝘁𝘆: Using AI for deep-dive debugging, automated unit testing, and code refactoring ensures fewer bugs and higher security. • 𝗢𝗽𝘁𝗶𝗺𝗶𝘇𝗲𝗱 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲: I use AI as a high-level pair programmer to double-check performance bottlenecks and ensure industry-standard design patterns. 🛠 𝗖𝗼𝗿𝗲 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 • 𝗛𝗶𝗴𝗵-𝗖𝗼𝗻𝗰𝘂𝗿𝗿𝗲𝗻𝗰𝘆 & 𝗦𝗽𝗲𝗲𝗱: Expert in building ultra-low latency APIs using 𝗧𝘆𝗽𝗲𝘀𝗰𝗿𝗶𝗽𝘁 (𝗙𝗮𝘀𝘁𝗶𝗳𝘆, 𝗘𝘅𝗽𝗿𝗲𝘀𝘀), 𝗣𝘆𝘁𝗵𝗼𝗻 (𝗙𝗮𝘀𝘁𝗔𝗣𝗜, 𝗙𝗹𝗮𝘀𝗸), and 𝗚𝗼𝗹𝗮𝗻𝗴 for high-performance microservices. • 𝗜𝗼𝗧 & 𝗜𝗻𝗱𝘂𝘀𝘁𝗿𝗶𝗮𝗹 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻: Strong background in 𝗠𝗤𝗧𝗧, 𝗠𝗼𝗱𝗯𝘂𝘀, 𝗮𝗻𝗱 𝗦𝗡𝗠𝗣. I’ve successfully built data-logging systems for solar panels and battery monitoring on 𝗥𝗮𝘀𝗽𝗯𝗲𝗿𝗿𝘆 𝗣𝗶 (𝗟𝗶𝗻𝘂𝘅) environments. • 𝗠𝗼𝗱𝗲𝗿𝗻 𝗔𝘂𝘁𝗵 & 𝗖𝗹𝗼𝘂𝗱: Proficient in 𝗦𝘂𝗽𝗮𝗯𝗮𝘀𝗲 (Auth & Storage) and custom 𝗝𝗪𝗧/𝗥𝗕𝗔𝗖 implementations to ensure your data is secure and access is granular. • 𝗦𝗰𝗮𝗹𝗮𝗯𝗹𝗲 𝗗𝗮𝘁𝗮 𝗣𝗶𝗽𝗲𝗹𝗶𝗻𝗲𝘀: Experience with 𝗥𝗮𝗯𝗯𝗶𝘁𝗠𝗤 + 𝗥𝗲𝗱𝗶𝘀 + 𝗣𝗼𝘀𝘁𝗴𝗿𝗲𝗦𝗤𝗟 for processing large-scale, real-time data streams and batch processing. • 𝗗𝗲𝗽𝗹𝗼𝘆𝗺𝗲𝗻𝘁 & 𝗗𝗲𝘃𝗢𝗽𝘀: Hands-on experience with 𝗗𝗼𝗰𝗸𝗲𝗿, 𝗣𝗠𝟮, and 𝗦𝘆𝘀𝘁𝗲𝗺𝗱 to ensure 𝟵𝟵.𝟵% 𝘂𝗽𝘁𝗶𝗺𝗲 in production environments. 💼 𝗦𝗲𝗿𝘃𝗶𝗰𝗲 𝗕𝗿𝗲𝗮𝗸𝗱𝗼𝘄𝗻 • 𝗕𝗮𝗰𝗸𝗲𝗻𝗱: Node.js (Fastify, Express, Typescript), Python (FastAPI), Golang • 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱: React, NextJS • 𝗗𝗮𝘁𝗮𝗯𝗮𝘀𝗲 & 𝗖𝗹𝗼𝘂𝗱: Supabase (Auth/Storage), PostgreSQL, MySQL, MongoDB, Redis • 𝗜𝗼𝗧 & 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻: MQTT, Modbus, SNMP, Data Ingestion, Raspberry Pi, Zabbix • 𝗣𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲: RabbitMQ, Real-time Data Pipelines, API Optimization • 𝗜𝗻𝗳𝗿𝗮𝘀𝘁𝗿𝘂𝗰𝘁𝘂𝗿𝗲: Docker, Linux Admin, Systemd, PM2, Shell Scripting "𝙄 𝙙𝙤𝙣'𝙩 𝙟𝙪𝙨𝙩 𝙬𝙧𝙞𝙩𝙚 𝙘𝙤𝙙𝙚; 𝙄 𝙗𝙪𝙞𝙡𝙙 𝙧𝙚𝙡𝙞𝙖𝙗𝙡𝙚 𝙨𝙮𝙨𝙩𝙚𝙢𝙨 𝙩𝙝𝙖𝙩 𝙚𝙢𝙥𝙤𝙬𝙚𝙧 𝙗𝙪𝙨𝙞𝙣𝙚𝙨𝙨𝙚𝙨 𝙩𝙤 𝙨𝙘𝙖𝙡𝙚. 𝙇𝙚𝙩’𝙨 𝙘𝙤𝙡𝙡𝙖𝙗𝙤𝙧𝙖𝙩𝙚 𝙖𝙣𝙙 𝙗𝙧𝙞𝙣𝙜 𝙮𝙤𝙪𝙧 𝙫𝙞𝙨𝙞𝙤𝙣 𝙩𝙤 𝙡𝙞𝙛𝙚 𝙬𝙞𝙩𝙝 𝙨𝙥𝙚𝙚𝙙 𝙖𝙣𝙙 𝙥𝙧𝙚𝙘𝙞𝙨𝙞𝙤𝙣." 🔑 Keywords: Backend Developer, RESTful API, Node.js, TypeScript, NestJS, Express.js, Python, Flask, FastAPI, Golang, Supabase, PostgreSQL, MySQL, MongoDB, Redis, RabbitMQ, MQTT, Docker, PM2, Systemd, IoT, Data Ingestion, RBAC, JWT, Scalable Systems.