Donnie

Technical Product Builder

AI Engineering: Architected autonomous AI agents and RAG pipelines using LangChain and LangGraph to automate complex document processing and business workflows. AdTech Infrastructure: Built a Marketing Attribution Platform with automated ETL pipelines integrating Google, Meta, and TikTok Ads APIs for real-time ROI analytics and CRM synchronization. Improved lead-to-sale conversion from 1:12 to 1:7 through data-driven marketing optimization for a nutraceutical company. System Architecture: Led the full software lifecycle of high-load systems, transforming business requirements into scalable backend architectures using FastAPI and Docker/Kubernetes. Engineering Productivity: Established AI-powered development workflows with Claude Code and Cursor, increasing development speed and reducing implementation time across backend projects.

• Improved lead-to-sale conversion from 1:12 to 1:7 through data-driven marketing optimization for a nutraceutical company.
• Established AI-powered development workflows with Claude Code and Cursor, increasing development speed and reducing implementation time across backend projects.

Tech Lead

Led the backend architecture of a comprehensive technology ecosystem supporting media buying, lead processing, and automated business operations. Designed and deployed a high-load, event-driven CRM platform using Python (FastAPI, Django), Apache Kafka, and Redis to process leads across multiple asynchronous workflows. Developed a centralized ERP system aggregating operational data from Keitaro, Telegram bots, virtual card providers, and ad platforms for unified financial reporting and KPI tracking. Built an end-to-end marketing attribution platform with Google, Meta, and TikTok Ads API integrations for real-time ROI and campaign effectiveness monitoring. Architected real-time media delivery and streaming infrastructure utilizing WebRTC, RTMP, HLS, S3, and CDN. Managed the end-to-end development and release of internal mobile applications for the Apple App Store and Google Play. Administered production infrastructure on Oracle Cloud using Docker and Kubernetes, ensuring high availability through monitoring with Grafana, Prometheus, and Sentry.

Middle Python Developer

Orchestrated technical planning and architectural roadmaps for a cross-functional team of six, enforcing high engineering standards and mentoring four junior developers. Designed and optimized high-performance backend services using Django and REST APIs, ensuring scalable data processing and stable production deployments. Engineered a complex Warehouse Management System (WMS) with deep ETL-like integrations for 1C, Ozon, and Wildberries, managing real-time inventory synchronization and multi-channel logistics data. Architected a secure mobile backend for a fitness ecosystem, implementing biometric identification protocols, QR-based access control, and automated subscription billing systems. Streamlined production deployments and technical documentation processes to ensure the long-term maintainability of outsourced products for diverse business verticals.

Junior Python Developer

Migrated legacy medical information system modules to a modern Flask architecture, reducing technical debt and improving system maintainability and performance. Developed and optimized RESTful APIs and complex SQL stored procedures to facilitate seamless data exchange and high-speed database queries. Engineered internal web interfaces and administrative tools to streamline clinical data management and healthcare reporting workflows. Maintained and updated existing core modules, delivering new mission-critical functionality within a high-compliance healthcare environment. Collaborated within a large-scale Agile team, adhering to rigorous engineering practices, version control (Git), and structured sprint cycles.