Hire the Best Algorithms Engineers
in Vietnam

I'm an AWS Certified Solutions Architect with 3+ years building production AI for enterprises and high-ticket B2B teams. I work in two lanes — enterprise AWS RAG, and AI-powered CRM/sales automation — and both ship to real production, not localhost demos. 🏢 EXPERIENCE IN Enterprise Conversational AI: + Covestro AG (via FPT Software) — Migrated a legacy HR chatbot to a multi-agent RAG platform on AWS Bedrock Knowledge Base. Cohere V3 embeddings, Amazon ReRank, Azure OpenAI GPT-4o. Event-driven ingestion (Lambda + SQS + DLQ) auto-syncs ServiceNow hourly. + FPT Software — Contract Intelligence — Skill-based extraction framework with prompt chaining. 35% accuracy lift, hallucinations sharply reduced. AWS Bedrock multi-model gateway, SSE streaming, scales to thousands of contracts per batch. + HTI Group — Agentic Chatbot — LangGraph + LlamaIndex ReAct agents, AWS Lambda + ECS Fargate, CI/CD via AWS CDK (TypeScript), Langfuse observability, hierarchical semantic chunking with auto-merge. 🤖 EXPERIENCE IN AI Sales Automation (GoHighLevel + CRM) + Inbound Sales Qualifier & Nurture Engine — AI layer wired into GoHighLevel (pipelines, triggers, calendar, SMS/email) for a high-ticket B2B offer. + Instantly scores leads on an 8-dimension Fit × Intent rubric, generates personalized email/SMS per lead, and answers inbound replies through a grounded RAG agent that only speaks from your real knowledge base — no invented pricing. + Hot leads auto-route to a rep + booking link; everyone else drops into smart nurture. FastAPI + pgvector + webhooks with retry/DLQ so no lead is ever dropped, plus an EventLog audit trail and a daily summary. Built end-to-end in a focused ~10-day sprint. What I do best: 🧠 Multi-Agent Systems — LangGraph, LlamaIndex, ReAct, agent supervisors, tool/skill orchestration 🔍 Production RAG — hybrid search, cross-encoder reranking, hierarchical chunking, graph RAG, grounded "no-hallucination" reply agents 📈 AI Sales & CRM Automation — GoHighLevel workflows, lead scoring, personalized nurture, calendar booking, webhooks + middleware (Python/Node), Make / Zapier glue ☁️ AWS Bedrock + OpenSearch + Lambda + ECS — real cloud-native, not localhost demos 🔒 Compliance — PII redaction, Bedrock Guardrails, zero-trust, KMS, IAM least-privilege 📊 LLMOps — Langfuse / LangSmith tracing, eval pipelines, LLM-as-judge 🧰 Infrastructure as Code — AWS CDK / TypeScript, Docker, GitHub Actions Engagement models I take: ⚡ Fast fixed-price build sprint (1–2 weeks) — ship a working AI feature, e.g. a GoHighLevel qualifier + grounded reply agent, or an MCP/agent tool surface 🔍 Architecture review (1 week, fixed price — see Project Catalog) 🚀 POC → Production migration (3–6 weeks) 🤝 Long-term retainer for ongoing AI platform work (2+ months) 🔗 Let's talk — message me with your stack, your scale, and your timeline.

Hello, thanks for checking out my profile. I am a C/C++ software developer, with good algorithmic ability. I spent several years working in my home country and now I'm here to expand my horizons and gain some much-needed experience in an international environment, I can help you: - Know about C/C++ programming, OOP, concurrency. - Linux, C/C++ projects from start to finish. - Solve complex algorithm/data structures problems using C++ I am confident in my professionalism and ability to complete work before deadlines. My goal is to exceed my customers' expectations. I look forward to working with you to solve your problems and improve your business productivity. Send me a message. I'll reply within 30 minutes. Thanks you so much!

👋 Hi, I’m Hung Le, a Full Stack AI Engineer helping startups and businesses build AI-powered products, SaaS MVPs, LLM/RAG systems, AI agents, automation tools, and scalable full-stack applications. I have 4+ years of experience across AI engineering, backend development, frontend development, fintech systems, OCR, eKYC, chatbots, web crawling, and production-ready software. My strength is combining AI capability with real product engineering, so clients do not just get a demo, they get a practical system that can be used, improved, and scaled. 𝟏/ 𝐈 𝐜𝐚𝐧 𝐡𝐞𝐥𝐩 𝐲𝐨𝐮 𝐰𝐢𝐭𝐡: ▪ AI SaaS MVP development from idea to working product ▪ LLM/RAG applications for documents, internal knowledge, search, and support ▪ AI agents and multi-step automation workflows ▪ Custom AI chatbots with private knowledge base integration ▪ Backend API development with FastAPI, Django, Flask, Node.js, and Golang ▪ Full-stack web apps using React.js, Next.js, PostgreSQL, MongoDB, and Docker ▪ OCR, computer vision, ID/document extraction, and eKYC systems ▪ Web crawling, data pipelines, dashboards, and internal automation tools ▪ Mobile and cross-platform apps using Flutter and Android 𝟐/ 𝐂𝐨𝐫𝐞 𝐒𝐤𝐢𝐥𝐥𝐬: ▪ Programming Languages: Python, Golang, JavaScript, TypeScript, Rust, Dart ▪ Backend: FastAPI, Django, Flask, Node.js, Celery, REST API, PostgreSQL, MongoDB ▪ Frontend: React.js, Next.js, JavaScript, responsive UI development ▪ AI/ML: LLM, RAG, LangChain, Ollama, PyTorch, TensorFlow, OpenCV, YOLO ▪ AI Product Development: AI agents, chatbots, document Q&A, knowledge retrieval, AI automation ▪ Data & Automation: Web crawling, Scrapy, data extraction, data processing, workflow automation ▪ DevOps: Docker, GCP, API deployment, production support ▪ Mobile: Flutter, Android, cross-platform application development 𝟑/ 𝐒𝐨𝐦𝐞 𝐡𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬 𝐟𝐫𝐨𝐦 𝐦𝐲 𝐰𝐨𝐫𝐤: ▪ Built a multi-agent AI news discovery system that processed 150-300 articles per day, reduced duplicate content by around 70-85%, and delivered daily digests plus real-time alerts for important fintech/business updates. ▪ Developed an internal AI customer-support assistant that helped agents search company knowledge faster, reducing average lookup time from 3-5 minutes to under 1 minute per ticket. ▪ Built a local LLM/RAG-style internal wiki assistant using Ollama, document retrieval, and metadata filtering over thousands of internal pages. ▪ Developed eKYC backend services using Golang and AI/OCR pipelines, helping reduce onboarding time by up to 95%. ▪ Built Vietnamese ID Card OCR and computer vision systems using YOLO, TensorFlow, PyTorch, OpenCV, and custom image-processing algorithms. ▪ Created full-stack systems using Python, FastAPI, Django, Flask, Node.js, React.js, Next.js, Flutter, PostgreSQL, MongoDB, Docker, and GCP. 𝟒/ 𝐖𝐡𝐚𝐭 𝐦𝐚𝐤𝐞𝐬 𝐦𝐞 𝐝𝐢𝐟𝐟𝐞𝐫𝐞𝐧𝐭: ▪ I can work across the full product lifecycle, from architecture and backend APIs to AI workflows, frontend UI, deployment, and iteration. ▪ I understand both AI experimentation and practical software delivery. ▪ I focus on business results, not just technical implementation. ▪ I communicate clearly, ask the right questions, and help clients avoid overbuilding too early. ▪ I can move fast for MVPs while still keeping the system clean and scalable. I’m especially interested in projects where AI is not just a “nice feature,” but a real part of the product: reducing manual work, improving search and decision-making, automating workflows, or helping users interact with complex data more easily. If you’re building an AI-powered SaaS, internal automation tool, RAG system, chatbot, OCR pipeline, or MVP that needs both strong AI thinking and full-stack execution, I’d be happy to help you turn it into a reliable product.

Most YouTube videos lose 60% of viewers in the first 30 seconds. Mine don't. I'm Tri — a YouTube editor and AI content creator with 3+ years of experience turning raw footage, scripts, and ideas into high-retention videos that keep audiences watching. I've managed a 300K+ subscriber channel and delivered content for Vingroup and Schannel. Today, I help brands, creators, and agencies produce both traditional video content and AI-powered marketing videos, including UGC ads, VSLs, AI avatar videos, and direct-response advertising creatives. I edit with one goal: keep people watching longer and drive action. Where I specialize • YouTube Videos, Talking Head Content, Courses, Interviews, Testimonials • Educational & Self-Improvement Content, Hooks, Pacing, Structured Narratives • Long-Form & Short-Form YouTube Editing • AI UGC Ads for TikTok, Meta, YouTube Shorts, and Reels • AI Avatar Videos & Direct Response Marketing Content • VSL (Video Sales Letter) Editing & Conversion-Focused Creative What you actually get • Retention-first editing Every cut, visual, and hook is designed to maximize watch time and audience engagement. • AI-powered content production From AI avatars and voiceovers to UGC-style advertisements and VSLs, I create scalable content without the need for on-camera talent. • Real channel experience Having managed a 300K+ subscriber channel, I understand audience psychology, retention metrics, and platform algorithms—not just editing software. • Corporate-grade polish Production experience with Vingroup and Schannel means your content maintains professional quality while remaining engaging and authentic. • 500+ projects delivered YouTube channels, documentaries, educational content, testimonials, brand videos, AI UGC ads, and performance marketing creatives. Services include • YouTube Video Editing • Short-Form Content (TikTok, Reels, Shorts) • AI UGC Video Creation • AI Avatar Videos • VSL Editing • Motion Graphics & Visual Storytelling • Stock Footage Research & Integration • Captions, Sound Design & Audio Enhancement Tools • DaVinci Resolve • CapCut PC Pro • AI Avatar Platforms (HeyGen, Higgfield, Nano Banana, etc.) • ChatGPT & AI Content Workflow Tools If you're building a channel, launching a product, running paid ads, or looking for scalable AI video content that actually performs, let's talk. Send me your channel, product, script, or sample video, and I'll tell you exactly how I'd improve it. Tri

Hello world!!! My name is Hiep, I am an embedded hardware design engineer. My expertise is designing hardware circuits, assembling, and testing the quality of the circuit. Give me your requirements or your product specification, and then we can discuss the timeline, cost, and how we can work together. Also, I have more than +8100 working hours, 100% Job Success on Upwork, and more than 8 years of experience in designing hardware for IoT Products, Consumer Products, and Edge devices, so I think I can use my experience to complete your project with the best result. + MY WORKFLOW: - Receive your detailed requirements or specifications, discuss what you want and what I need to do. - Design block diagram for the circuit: needs to be very detailed, it will decide what part will be used in the project. - Design schematics: follow the block diagram to design the schematic for the product. - Design PCB Layout: with requirements about Mechanical Design and Industrial Design, I will do the PCB Layout to fit with your Mechanical Design to achieve the best performance. - Extract production data: BOM, CAD, GERBER, DESIGN, ASSEMBLY GUIDELINE, IMPEDANCE CONTROL REQUIREMENTS, ... + MY TECHNICAL EXPERIENCES: - SoC/ MCU: STM32F0/F1/F2/F4/F7/H7, STM32L1/L4, MSP430, MSP432, ATMEGA, ATSAM, PIC, ESP8266, ESP32, CC2530, CC2538, nRF52810/ nRF51822/ nRF52832/ nRF52840/ nRF5340, ... - Sensor: light sensor, CO, Smoke Sensor, Dust Sensor, Air Sensor, pH sensor, IMU sensor, Accelero, Gyro sensor. - Biosensor SPO2/PPG (OB1203, MAX32664 sensor hub, MAX86176, MAX86178, AFE4950…), Skin temperature (AS6221, MAX30205, MAX30208), ECG (ADS1292, ADS1293, ADS1294, ADS1298, MAX86150, MAX30003,…), Heart rate, Blood pressure,... - True wireless earbuds, headsets and speakers, Bluetooth ® LE Audio standard from Qualcomm: QCC5141, QCC5171, QCC5181,... - Wireless communication: DA16200 BLE MCU, WiFi, BLE4.0/4.1/5.2, Lora, Zigbee, NFC, eSIM, GNSS/GPRS/4G/LTE Module: SIM900A, SIM908, Quectel MC60/M95/EG91x, SIM7600, SIM7080, SIM7090G... - Digital and high-speed electronics design: - Memories DDRx/LPDDRx, SDRAM, Camera and display interfaces (MIPI-DSI, MIPI-CSI, DisplayPort, etc), Data communication interfaces (QSPI, SPI, UART, I2C, FMC, I2S, USB 2/3.x, etc), ( - RF Designs: 1-6 GHz (UWB, Wifi, BLE, ZigBee, GPS, NB-IoT, LTE-M/LTE, Z-Wave, etc), 13,6 MHz, 128 kHz (NFC, RFID, etc), 433 MHz (Custom protocols). - Some industry circuits: Modbus, voltage to current/current to voltage converter, isolation interface, current/voltage measurement,… - Ultra-low power consumption device hardware developments: Ultra-low locker using non-rechargeable battery with life-span of up to 10 years, some wireless devices with 2 years operation with 620mAh battery,… - Power electronics: wireless charger, high power PD charger, BMS, PMIC, OV/OC/UV, high current PCB (30 – 100A),… - Mass Production: Discussing, processing steps, and managing the manufacturing process of PCBs, PCBAs, and assembly devices, processes in production include: discussing with the bare PCB factory, building self-test documents, production testing PCBAs at the factory, documenting and testing, and managing the device testing process after assembling the device. - Tools: Altium Designer (Altium365/CircuitMarker), KiCAD, Eagle, EasyEDA; OrCAD, PSpice, CAM350. - Prototyping: Experience with BOM creation (Digikey/Mouser/JLCPCB) and combining dimensional drawings into precise Gerber formats. - CAD/3D design tool: SolidWorks, Inventor... + Some of the products that I have designed and released to the market: - IoT products: Wearable devices tracking the biological index, Devices control hub over Wifi, Internet, Bluetooth, OBD devices,... - Smart Home Product: Design Home Gateway with Ethernet, WiFi, Zigbee, TFT LCD, ... Design Smart Switch with capacitive touch, Zigbee communication, 220VAC/110VAC load control, ... - Tracking Device: Using 3G/4G with GPS, this device is used for personal tracking ... and a lot of other products ... I hope to work with you, to help you complete your project and release your product to the market Best regards Hiep Le

Senior Fullstack Software Engineer | Java, Node.js, React | CMS & IoT Expert 🚀 About Me I am a Senior Fullstack Software Engineer with 4+ years of experience in developing high-performance web applications, CMS platforms, and IoT solutions. My expertise spans across Java Spring Boot, Node.js, React, Magnolia CMS, and cloud-based architectures. I have led teams, optimized complex systems, and built scalable solutions for enterprise-level clients. 🔹 Backend: Java Spring Boot, Node.js, NestJS, Microservices, GRPC 🔹 Frontend: React.js, React Native, Headless CMS 🔹 CMS: Magnolia CMS, Liferay, WordPress 🔹 Databases: MySQL, MongoDB, SQL Server 🔹 DevOps & Cloud: Docker, Kubernetes, GitLab CI/CD, AWS 🔹 IoT & AI: Zigbee, MQTT, OpenCV, AI-based detection systems 💼 Notable Projects ✅ MMP’s CMS Website: Built a Java Spring Boot-based CMS optimized for high traffic and large datasets. ✅ Dentsu’s Headless CMS: Developed a scalable API-driven CMS using Magnolia CMS and React. ✅ Yoolife & YooIOC Applications: Smart city applications for residential and operational management. ✅ IoT Platform for Smart Devices: Developed a gateway integrating Zigbee, Z-Wave, and BLE devices with AI-powered event detection. 🔍 Why Work With Me? ✔ Proven expertise in enterprise CMS solutions & IoT systems ✔ Strong problem-solving skills in system architecture & optimization ✔ Experience leading development teams & mentoring junior engineers ✔ Passionate about building scalable, high-performance applications Let’s connect and bring your ideas to life! 🚀