Open to opportunities

Volodymyr Tkach

@volodymyrtkach

Message

Senior full-stack engineer building reliable fintech and AI systems end to end.

Ukraine

Message

What I'm looking for

I’m looking to build and modernize high-reliability products end to end—combining backend architecture, AI/RAG, and real-time systems—within a pragmatic, fast-moving engineering culture where I can own delivery and raise engineering standards.

I’m a Senior Full Stack Engineer with 6+ years designing and maintaining production-grade systems across FinTech, LegalTech, and Web3. I deliver across the stack with FastAPI and Django on the backend, RAG with Generative AI, and graph databases—paired with Next.js and React Native for responsive product experiences.

I’m known for improving reliability and maintainability in fast-paced teams, whether refactoring legacy code or building greenfield platforms. Recently, I architected a secure, real-time order processing foundation for AI-driven investment models, led major modernization to accelerate the SDLC, and built enterprise legal risk/COI tooling using a hybrid FalkorDB + PostgreSQL knowledge graph—plus Web3 mini-app and high-frequency indexing services to keep insights current and actionable.

Experience

Work history, roles, and key accomplishments

Current

Senior Full Stack Engineer

Current

Investwizz

Sep 2025 - Present (9 months)

Architected the core FinTech platform with a secure, real-time order processing system and data pipelines powering predictive AI investment models. Led backend modernization and refactoring to eliminate bottlenecks and significantly accelerate the SDLC, while delivering a high-performance React Native client for live market data and AI insights.

Python fastAPI React Native AWS Data Pipelines Order Management Systems Real Time Systems Graph Databases SDLC Refactoring

Lead Full Stack Engineer

Meduzzen

May 2024 - Aug 2025 (1 year 3 months)

Architected an enterprise legal risk platform for automated Conflict of Interest (COI) checks, reducing compliance risks for large-scale firms. Delivered a Web3 Telegram mini-app by unifying cross-platform identities and optimizing on-chain interactions to cut API latency by 35%, improving user retention.

fastAPI TypeScript React Next.js FalkorDB PostgreSQL Celery RabbitMQ WebSockets

Full Stack Engineer

Meduzzen

Jul 2020 - May 2024 (3 years 10 months)

Built mission-critical SaaS tooling for the auction industry, delivering 30+ automated financial reporting generators for enterprise clients. Overhauled PostgreSQL performance and indexing for 50+ clients and migrated monolithic components into modular microservices to improve scalability and stability during high-traffic events.