Vasyl T.

I help design and build AI-powered products, scalable backend systems, APIs, integrations, and cloud infrastructure that solve real business problems. I'm a senior software engineer with 8+ years delivering production systems across Fintech, SaaS, and AI environments. My focus is reliable software that scales, integrates cleanly, and creates measurable business value. What I can help you with: - Backend architecture and development - AI product backends, agent systems, RAG, and data pipelines - REST APIs, microservices, and event-driven systems - Third-party integrations (payments, accounting, ecommerce, ads platforms, auth providers) - Cloud infrastructure (AWS / GCP) and CI/CD pipelines - Performance optimization and reliability improvements - Debugging difficult production issues - Turning vague business requirements into production-ready systems Relevant Experience: ✓ Built distributed systems analyzing advertising performance for high-budget campaigns ✓ Developed fintech platforms with financial and accounting integrations ✓ Built secure authentication and authorization services ✓ Designed scalable event-driven architectures ✓ Created structured/unstructured data pipelines for AI/LLM workflows 🧰 Tech Stack Languages: Python, Rust Frameworks: FastAPI, Flask AI & Agents: Claude API, OpenAI API, LangGraph, RAG, LLM orchestration Databases & ORM: PostgreSQL, MySQL, Firestore, Redis, SQLAlchemy Cloud & DevOps: AWS (S3, Lambda, EC2, ECS), GCP, Docker, Terraform, Pulumi, GitHub Actions, GitLab CI/CD Data & Automation: Airflow, Pandas, PySpark, dbt, Airbyte Testing & Monitoring: Pytest, Sentry, Datadog, Papertrail Integrations: Stripe, Plaid, Auth0, Shopify, NetSuite, Xero, QuickBooks, Codat, Salesforce, Fivetran