maciejk
Senior Backend/Full Stack Developer | Agentic Ai/Llm Engineer
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Senior Full-Stack Engineer and AgenticAI specialist with 10+ years architecting cloud-native, AI-driven platforms. Expert in building production microservices delivering sub-200ms latency while handling millions of requests at 99.9%+ uptime. Deep expertise in LLM orchestration (RAG, embeddings, tool calling, streaming), agentic architectures, and vector search. Proven track record combining intelligent Python/Go backends with responsive React frontends to deliver end-to-end AI solutions.
Experience: 10 years
Yearly salary: $150,000
Hourly rate: $70
Nationality: 🇵🇱 Poland
Residency: 🇵🇱 Poland
Experience
Agentic AI/LLM Engineer & Full Stack Developer
Your Twin LLC 2025 - 2026
Built real-time AI companion platform with fully asynchronous infrastructure, distributed task processing, and event-driven architecture for low-latency interactive conversations.
Golang/Python Backend Developer & LLM Engineer
Just Ask 2024 - 2024
Led intelligent e-commerce search platform development combining polyglot microservices with AI-powered product discovery.
Backend & LLM Engineer
Zentra Tech 2023 - 2023
Engineered LLM-powered trading strategy generation system with automated backtesting and multi-provider AI integration.
Backend Developer
TRAIT Tech 2022 - 2022
Developed blockchain data infrastructure with high-performance Rust pipelines and scalable API gateway for real-time analytics.
Full-Stack Developer
Sticker Pack, Inc. 2021 - 2022
Built end-to-end e-commerce platform for personalized sticker creation with seamless payment and automated print fulfillment.
Full-Stack Developer & Data Scraping Expert
Upwork (Freelance) 2016 - 2020
Delivered custom full-stack applications and large-scale data extraction solutions for analytics and AI platforms.
Skills
ai
backend
devops
front-end
full-stack
python
english