Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

Hi, I'm Sebastian Mroz, a Senior Software Engineer with 10+ years of experience delivering scalable, high-performance web applications. I specialize in React and TypeScript and thrive in full-stack development across modern cloud environments. I have a track record building AI-powered enterprise knowledge systems, healthcare SaaS, and financial analytics platforms. I love architecture, system design, and collaborating with remote, cross-functional teams to ship reliable, business-critical software.…Hi, I'm Sebastian Mroz, a Senior Software Engineer with 10+ years of experience delivering scalable, high-performance web applications. I specialize in React and TypeScript and thrive in full-stack development across modern cloud environments. I have a track record building AI-powered enterprise knowledge systems, healthcare SaaS, and financial analytics platforms. I love architecture, system design, and collaborating with remote, cross-functional teams to ship reliable, business-critical software.

Sebastian Mroz

Full Stack Developer, Back-End Developer, Front-End Developer, +2





Hi, I'm Sebastian Mroz, a Senior Software Engineer with 10+ years of experience delivering scalable, high-performance web applications. I specialize in React and TypeScript and thrive in full-stack development across modern cloud environments. I have a track record building AI-powered enterprise knowledge systems, healthcare SaaS, and financial analytics platforms. I love architecture, system design, and collaborating with remote, cross-functional teams to ship reliable, business-critical software.…Hi, I'm Sebastian Mroz, a Senior Software Engineer with 10+ years of experience delivering scalable, high-performance web applications. I specialize in React and TypeScript and thrive in full-stack development across modern cloud environments. I have a track record building AI-powered enterprise knowledge systems, healthcare SaaS, and financial analytics platforms. I love architecture, system design, and collaborating with remote, cross-functional teams to ship reliable, business-critical software.

Available to hire

Hi, I’m Sebastian Mroz, a Senior Software Engineer with 10+ years of experience delivering scalable, high-performance web applications. I specialize in React and TypeScript and thrive in full-stack development across modern cloud environments.

I have a track record building AI-powered enterprise knowledge systems, healthcare SaaS, and financial analytics platforms. I love architecture, system design, and collaborating with remote, cross-functional teams to ship reliable, business-critical software.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Work Experience

Senior Software Engineer at Globant

July 20, 2022 - October 20, 2025

Developed highly scalable React and TypeScript front-end platforms powering complex healthcare applications; led backend work with Node.js and Python, delivering secure, high-performance APIs. Drove cloud-native architecture on AWS (Lambda, DynamoDB), improved system reliability under peak loads, and contributed to AI-powered enterprise knowledge systems. Modernized front-end delivery with Redux, React.js, and Next.js, boosting developer velocity and user engagement across thousands of daily active users.

AI/ML Engineer at Netguru

March 20, 2018 - June 20, 2022

Developed AI-powered environmental monitoring systems using Python, TensorFlow, and PyTorch; processed real-time IoT sensor data streams and improved prediction accuracy by 45%. Implemented scalable backend data ingestion with Node.js and REST APIs, reducing processing delays by 30%. Executed advanced data pipelines with Elasticsearch, MongoDB, and Redis for real-time insights in critical infrastructure. Delivered a front-end dashboard using React and TypeScript and led cloud deployments on AWS (Lambda, DynamoDB), enhancing resilience. Integrated AI-driven forecasting and analytics to cut transportation costs by 20% across large-scale logistics networks.

Software Engineer at Valtech

October 20, 2014 - February 28, 2018

Developed high-performance advertising platforms in JavaScript and Node.js, processing billions of ad requests daily with low latency and achieving a 40% increase in system throughput. Built scalable front-end apps with React and modern JS frameworks, boosting user experience and campaign performance tracking. Optimized backend using MySQL and Redis for high-traffic production environments, reducing response times. Delivered complex e-commerce solutions integrating ERP, CRM, and CMS to synchronize data across business units. Strengthened API reliability with REST and automated testing, reducing production issues by 25%.