Олександр

Oleksandr Zakhozhyi
AI/ML Engineer | Production LLM, RAG, Agentic & Speech AI Systems
Ukraine · Remote EMEA / Worldwide · [open contact info](look above in the "contact info" section) · [open contact info](look above in the "contact info" section) · LinkedIn · GitHub · Upwork

AI/ML Engineer building production AI systems since 2023. I design, implement, deploy, and maintain end-
to-end LLM/RAG/agentic, speech, and classical ML systems with Python/FastAPI, PostgreSQL/pgvector, Redis,
and Docker. Top Rated on Upwork; PhD research focuses on continual learning and Edge AI/IoT.

CORE SKILLS
AI / LLM: OpenAI API, Grok, LangChain, LangGraph, RAG, Backend / Data: Python, FastAPI, asyncio, REST,
agents/tool calling, MCP/FastMCP, vector search, structured WebSockets, PostgreSQL, pgvector, Redis, SQL
outputs
ML / Speech: PyTorch, scikit-learn, Whisper/faster-whisper, Infra / Edge: Docker, AWS/Azure, Linux, Git, CI/CD practices,
Wav2Vec2, TensorFlow/Keras, NLP, CV, time series Rust/C++, ESP32, TensorFlow Lite Micro

PROFESSIONAL EXPERIENCE

AI/ML Engineer EZLOGZ May 2025 - Aug 2026 · Remote
• Built and maintained production AI/backend systems across US-facing products in the EZLOGZ / EzTechTonic
ecosystem, owning API integration, model orchestration, reliability, latency, and deployment-oriented
engineering.
• SprtGenie: engineered FastAPI/WebSocket services and LLM orchestration for structured sports predictions,
live-search/tool workflows, PostgreSQL/pgvector retrieval, Redis-backed jobs, and real-time AI chat.
• Lingo Driver: built a GPU-backed speech-learning pipeline combining faster-whisper, Wav2Vec2 phoneme
analysis, pronunciation scoring, Redis sessions, and LLM-generated feedback behind FastAPI services.
• Hera Flight: contributed AI/backend code to a production private-aviation application and integrated API
workflows supporting AI-assisted booking and user experiences.
AI / Backend Engineer Freelance Mar 2025 - May 2025 · Remote
• Built an AI-first SysML diagram-generation platform from scratch with FastAPI, LangGraph/OpenAI,
PostgreSQL/pgvector, Redis, and Docker.
• Implemented multi-stage generation, validation, retrieval, caching, and asynchronous API workflows to keep
model-driven diagram generation reliable and maintainable.
AI Engineer DataBridge Apr 2024 - Mar 2025 · Ukraine / Remote
• Designed and integrated production voicebot and speech-recognition workflows for healthcare use cases,
connecting conversational AI components with backend services and operational flows.
• Engineered ML/API pipelines with a focus on latency, service reliability, validation, and production
troubleshooting.
Freelance ML Engineer Upwork & Direct Clients Oct 2023 - Mar 2024 · Remote
• Delivered client ML projects across time-series forecasting, computer vision/satellite imagery, NLP, and model
evaluation in Python; built training/inference pipelines and production-ready deliverables from ambiguous
requirements.

EDUCATION & RESEARCH SELECTED CERTIFICATIONS
PhD Candidate, Electronics - Zhytomyr Polytechnic State University · 2025 Microsoft Azure Fundamentals · DeepLearning.AI
- Present TensorFlow Developer · Azure Databricks & Spark
Research: continual learning, Edge AI and ML for resource-constrained for Data Engineers
embedded/IoT systems; ESP32/TinyML experimentation.
Master's Degree, Forestry - Polissia National University