Open to opportunities

Mateusz Gemzicki

@mateuszgemzicki

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Senior Full Stack Engineer with 8 years building scalable cloud platforms. Python, React, AWS expert.

Poland

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What I'm looking for

I am seeking senior roles that combine solution architecture, AI/ML projects, and team leadership in cloud-native environments, with opportunities to mentor and deliver business-impacting solutions.

I'm a Senior Full Stack Developer with 8+ years of experience building production-grade cloud platforms and AI-powered applications. I specialize in architecting scalable solutions using Python (Django, FastAPI), React/TypeScript, and AWS infrastructure.

Currently at Ascendion, I built an insurance contract comparison platform processing 500+ documents monthly with 95% accuracy using Azure AI Search, reducing manual review time from 4 hours to 15 minutes. I've architected microservices handling 50K concurrent requests with sub-200ms response times and optimized Kubernetes deployments achieving 99.5% uptime.

Previously at Wizzdev, I developed AWS IoT platforms processing 10M daily sensor readings from 500+ medical devices with 99.95% uptime, and engineered real-time analytics dashboards reducing reporting latency from 2 hours to 5 minutes.

My expertise spans:

• Backend: Python (Django, FastAPI, Flask), Node.js, PostgreSQL, MongoDB, Redis, GraphQL

• Frontend: React, TypeScript, Next.js, Vue.js, TailwindCSS

• Cloud & DevOps: AWS (Lambda, EC2, RDS, S3), Azure, Docker, Kubernetes, Terraform, CI/CD

• AI/ML: RAG systems, LLMs, Vector Databases, LangChain, NLP

I've mentored 12+ developers, established CI/CD pipelines reducing deployment time by 85%, and delivered solutions that generated €1.5M+ in client revenue. I focus on writing clean, maintainable code and delivering measurable business impact through technology.

Experience

Work history, roles, and key accomplishments

Current

Senior Full-Stack Developer

Current

Ascendion

Oct 2025 - Present (4 months)

Developed an insurance contract comparison web application with document ingestion, normalization, and change-detection workflows; implemented Azure AI Search for full-text search and optimized Kubernetes for improved stability and performance.

Python Azure AI Search Kubernetes Document Processing Full Text Search Backend Development DevOps CI CD

Senior Full-Stack Developer

Wizzdev

Nov 2024 - Oct 2025 (11 months)

Designed and led AWS cloud projects and AI transformation initiatives (chatbots, RAG, ML pipelines) for global clients, aligning technical architecture with business requirements and stakeholder expectations.

AWS Solution Architecture Generative AI RAG Chatbot Stakeholder Management Cloud Architecture

Senior Full-Stack Developer

Wizzdev

May 2023 - Nov 2024 (1 year 6 months)

Built a cloud solution to manage medical device readings and deliver analytics; implemented code quality standards and delivered a real-time dashboard that reduced analytics delay from 2 hours to 5 minutes.

Python Cloud Architecture Dashboards fastAPI Django Data & Analytics

Senior Full-Stack Developer

Polcode

Jan 2021 - Apr 2023 (2 years 3 months)

Delivered end-to-end frontend and backend solutions across e-commerce, events, and e-learning; worked on NLP using Neo4j, Solr, Elasticsearch and built serverless APIs and scraping/analysis tools.

Python Django fastAPI Neo4j Elasticsearch Solr Serverless API Development Frontend

Python Software Developer

Wizzdev

Jun 2017 - Dec 2020 (3 years 6 months)

Developed web and desktop Python applications supporting a London data science team, managed CI/CD for multiple projects, and created serverless APIs and cloud migration scripts including an Air Pollution Aggregator product.