drewdru

Skills: JS/TS(Nestjs, Prisma), Python(FastAPI, PyTorch, nltk), Azure (OpenAI, Storage, AI AzureSpeach, Custom question answering), LLM(Anthropic, ChatGPT, Gemini, phi3, Llama, LlamaIndex), LangChain, ChromaDb, PostgreSQL, Docker, Kubernetes, AWS(S3, transcribe, EC2), RabbitMQ, Redis, Firebase. Designed and implemented AI Q&A chat system (REST API + SSE) with integration of modern LLMs and cloud services, and knowledge base management platform with OCR, audio transcription, pre-processing for RAG systems and integration with LMS Docebo, Google Drive, AWS. Conducted in-depth R&D into RAG quality improvement, systematically analyzing document preprocessing and contextual enrichment, retrieval and query optimization, entity/relationship extraction, hybrid search, conversation context, context compression and emerging approaches including Graph RAG, Corrective RAG, Self-Reflective RAG and HyDE. Improved retrieval quality using RAGAS, Optuna and Cohere re-ranking. Led integration of LangChain and Langflow for improved AI workflows.

Skills: TS, Node(Express), Python(Flask, Tornado), Vue, React, GraphQL, RabbitMQ, Docker, PostgreSQL. Developed a tournament scheduler for the gamified assessment system Cibirlan; algorithms for team creation with role assignment; real-time chat using Socket.IO. Implemented an admin panel for a video surveillance system with a customizable dashboard, widgets, and WebRTC pipelines.

Skills: TS, NodeJS(NestJS), React.js, Python(Django), GCP, PostgreSQL, Redis, Docker, MongoDB. Developed a payment platform for selling courses and physical goods. Implemented product form; category hierarchy builder; invoice form with payment system settings, discount and promo code logic; customizable invoice flow with auto-registration on third-party services; sales reports; tax calculation for sellers. Integrated delivery services (Shiptor, ChinaDivision); payment systems (Bluesnap, Fondy, PayPal, YooMoney, Stripe); email delivery (SendGrid); external course-selling platforms. Built calorie calculation, cross-platform sync, and multilingual interfaces.

Skills: TS, Node(Nest.js), Angular, AWS(Amplify/Lambda/DynamoDB/Cognito), RabbitMQ, Docker, PostgreSQL, MongoDB. 1. Developed an admin panel for the MVP of a freight transportation system with Cognito authorization, geocoding and data visualization using here.com. 2. Designed and implemented scalable architecture for white-label licensing for I-EXP projects. Built a Telegram bot, neural network training data generation tools, image similarity vector search, and authentication. 3. Built a website security analysis system.

Skills: Python(FastAPI,Django/DRF,Flask), SqlAlchemy, TensorFlow, TypeScript, AngularJS, Vuejs, Go, PostgreSQL, Redis, Celery, Docker, Minio, S3, scrapy/selenium, Clickhouse, MSSql. 1. onfin.io (ECN.Broker): Led development of a fintech trading platform including admin panel, user account, trader training pages, landing pages, email templates, authorization form. Built microservice for MetaTrader 4 API, Telegram bot, referral program, forex calcs. Integrated payment systems (RBK.money, Accentpay, Interkassa, SorexPay); WYSIWYG editor Quill; Claws&Horns); google visualization charts; IndigoSoft; RAMM copy trading; Bpilot for contract specification; SendGrid for email delivery. 2. B2B-export: Built admin panel, user account pages, email templates, category hierarchy builder, bulk product import. Integrated ABBYY API for product translations. 3. Carreta: Implemented product prices crawler and bulk price import feature. 4. Developed internal projects: CSV/XLS report aggregator, user testing system, OCR tool.

Skills: Python(Django/SQLAlchemy), TypeScript, AngularJS, OpenLayers 3, PostgreSQL. Developed geospatial tools and applications for Yenisei GIS mapping platform. Focused on medical GIS features, combining OpenLayers with backend data pipelines using Python and PostgreSQL with PostGIS. Implemented Aigeo References, a comprehensive geospatial reference system. Created normalization tools to improve the accuracy of mapping algorithms.