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Maksym Musii

@maksymmusii

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Senior Full-Stack Engineer and Automation Specialist delivering scalable web, cloud, and AI Automation solutions.

Poland

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What I'm looking for

I seek roles building scalable SaaS or automation solutions using cloud, AI, and DevOps best practices, with impact-focused teams and clear ROI.

I am a Senior Full-Stack Engineer with 8+ years delivering scalable web, cloud, and automation solutions across MERN/Next.js, .NET, and AWS. I build performant SaaS platforms, RAG-based AI chatbots, and CI/CD pipelines that reduced cloud spend by 30% and saved thousands of engineering hours.

I have a background in AI (MSc) and proven experience automating business processes with UiPath, Zapier, Power Automate and custom scripts, improving reliability and user engagement while driving measurable ROI and operational efficiency.

Experience

Work history, roles, and key accomplishments

Senior Full-Stack Engineer

Coherent Solutions

Oct 2022 - Dec 2024 (2 years 2 months)

Led architecture and delivery of a B2B SaaS platform using Next.js and NestJS on AWS EKS, improving Lighthouse scores by 35+ points and reducing page load time by 20%; built a RAG AI chatbot handling 5,000+ queries/month and optimized CI/CD and AWS resources to cut cloud spend by 30% (~$18,000/year).

Next.js NestJS OpenAI API Pinecone GitHub Actions CI CD Performance Optimization

Full-Stack Developer

Synerise

Feb 2019 - Apr 2022 (3 years 2 months)

Delivered enterprise applications using MERN and .NET stacks, improving reliability by 25%; built WordPress plugins for sites with 100k+ monthly visitors integrating HubSpot and Salesforce, saving 15+ manual hours/week, and developed a React Native logistics app that cut dispatch time by 18%.

MERN .NET Core React Native WordPress HubSpot Salesforce API MongoDB PostgreSQL

Automation & Systems Analyst

Profil Software

Oct 2016 - Dec 2018 (2 years 2 months)

Identified 50+ automation opportunities delivering $200k annual ROI; built UiPath bots processing 500+ invoices weekly at 99.9% accuracy, saving 20+ manual hours/week, and implemented HubSpot and Salesforce automations that increased MQLs by 50% in 6 months.