Python, Django, Django REST Framework, FastAPI, SQLModel, Frappe, Flask.

LLM integration (Claude, OpenAI, Gemini), tool/function-calling architecture, prompt engineering, cost telemetry, anomaly detection.

GCP, AWS, DigitalOcean, Docker, CI/CD, Nginx · PostgreSQL, MySQL, MongoDB, Neo4j, Redis · Celery, RabbitMQ, Kafka, WebSockets, Server-Sent Events.

REST and GraphQL API design, OAuth 2.0, microservices, SOLID · unit / integration / end-to-end / load testing, TDD and BDD with Pytest.

I build the agent side of Glitch's ad platform: GlitchOps Bot, an autonomous engineering agent in daily production use, the cost observability around it, and the HubSpot CRM and conversion-tracking integrations behind the Google and Meta Ads work. The deep write-ups live at immanuelcaspian.com/systems.

AI-powered SEO platform. Built LLM content-generation systems producing 160+ SEO-optimized topics per client domain, the Celery/Redis task infrastructure to run them with retries and failure recovery, and zero-downtime Django migrations on production data.

Led backend development of an e-commerce and payments platform serving thousands of users. Cut API response times 40% through indexing and query optimization, shipped role-based access control and secure payment integrations, and mentored three junior engineers, mostly through code review.

Rebuilt the backend of a B2B payment-acceleration platform (invoicing, collections, financing) in Django while it kept serving businesses. Integrated Spendjuice, Mono, and Paystack, and cut deploy rollout time 30%.

Led backend development for v2 of a crypto-exchange platform. Built the blockchain deposit and withdrawal flows via block.io and ran the Docker/Nginx infrastructure on DigitalOcean.

Decentralized health-tech for secure medical data exchange. Migrated the backend from GraphQL to REST with DRF, cut response times 35%, and supported HIPAA-compliant exchange of medical records.

First engineering role. Python and Django in production, learning API design, databases, and cloud infrastructure by shipping real features and being on the hook for them.

Programming, operating systems, data structures & algorithms, system analysis & design.