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