Milos K.

I work on backend systems where things need to work reliably in production. My focus is on: AI integrations (RAG pipelines, OpenAI, automation workflows) backend APIs (Python / FastAPI / Laravel) payment systems (Stripe, subscriptions, webhooks, transaction flows, Cards, SEPA,...) system stabilization and production issue fixing Recently, I’ve been building: RAG-based systems with hybrid retrieval (Qdrant + OpenSearch) AI automation workflows and API services payment integrations with complex billing logic and webhook handling backend architectures for scalable systems diffusion-based workflows, LoRA training, and model-serving setups for practical AI use cases I don’t approach projects as “just coding tasks.” Most problems I work on involve: broken flows unreliable integrations scaling issues unclear architecture decisions If something is not working as expected, I focus on finding the root cause and fixing it properly, not patching symptoms. Typical things I help with: fixing Stripe subscriptions, payments, and webhook issues building or stabilizing AI / RAG backends debugging production API issues designing backend architecture for new or existing systems supporting diffusion pipelines, LoRA training workflows, and related AI infrastructure Tech stack: Python, FastAPI, OpenAI, Qdrant, OpenSearch, Laravel, MySQL, Docker, AWS, Hugging Face Diffusers, Transformers.. If you need someone who can quickly understand your system and fix or build it without unnecessary complexity, feel free to reach out. *** AI Automation & RAG Engineer | OpenAI, FastAPI, Vector DB, Backend Systems *** I build production-ready backend systems for AI-powered applications. My focus is on: - RAG (retrieval-augmented generation) - OpenAI integrations - backend APIs with Python and FastAPI - vector search and hybrid retrieval with Qdrant and OpenSearch - AI automation workflows I’ve worked on systems that: - ingest and structure knowledge from multiple sources - perform hybrid retrieval using dense and keyword search - generate grounded responses with LLMs - support production-level usage, not just demos I do not build generic chatbots. I build systems where: - data is structured properly - retrieval is reliable - outputs are grounded and controlled Typical tasks include: - building RAG pipelines - developing AI backend APIs - integrating OpenAI into existing systems - improving retrieval quality and response grounding - designing AI workflows and backend architecture Tech stack: Python, FastAPI, OpenAI, Qdrant, OpenSearch, Docker If you need a real backend for your AI product, not just a prototype, I can help. *** Stripe & Payment Systems Engineer | Subscriptions, Webhooks, Laravel, APIs *** I specialize in payment systems and Stripe-based integrations. I’ve worked on: - subscriptions and billing flows - webhook handling and synchronization - failed payment recovery - transaction logic and consistency - card-related flows and backend systems Most issues I fix are not simple bugs, but problems like: - duplicate or missing webhook events - incorrect subscription states - payment flow inconsistencies - retry logic issues - reconciliation problems I approach these systems from a backend and flow perspective, not just API calls. Typical tasks I handle: - Fixing broken Stripe integrations - Debugging webhook issues - Implementing subscription systems - Stabilizing payment flows in production - Backend logic for billing systems Tech: Stripe, Laravel, APIs, MySQL, webhooks, backend systems If your payments are not behaving as expected, I can help you identify the root cause and fix it properly.