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Hi! I'm Vitalii, a Senior Full Stack Developer who loves building high-performance web and mobile applications. I have hands-on experience leading development projects from architecture design to production deployment, and I specialize in creating scalable systems using modern frameworks like React, Next.js, Node.js, and Python. I am passionate about clean code, performance optimization, and secure engineering. I enjoy bridging business goals with technical execution by translating complex problems into elegant software solutions. I've also mentored junior engineers, integrated CI/CD pipelines, and deployed infrastructure on AWS, always focusing on delivering measurable value.…Hi! I'm Vitalii, a Senior Full Stack Developer who loves building high-performance web and mobile applications. I have hands-on experience leading development projects from architecture design to production deployment, and I specialize in creating scalable systems using modern frameworks like React, Next.js, Node.js, and Python. I am passionate about clean code, performance optimization, and secure engineering. I enjoy bridging business goals with technical execution by translating complex problems into elegant software solutions. I've also mentored junior engineers, integrated CI/CD pipelines, and deployed infrastructure on AWS, always focusing on delivering measurable value.

Vitalii Matviienko

Blockchain Developer, Full Stack Developer, Developer, +5

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Hi! I'm Vitalii, a Senior Full Stack Developer who loves building high-performance web and mobile applications. I have hands-on experience leading development projects from architecture design to production deployment, and I specialize in creating scalable systems using modern frameworks like React, Next.js, Node.js, and Python. I am passionate about clean code, performance optimization, and secure engineering. I enjoy bridging business goals with technical execution by translating complex problems into elegant software solutions. I've also mentored junior engineers, integrated CI/CD pipelines, and deployed infrastructure on AWS, always focusing on delivering measurable value.…Hi! I'm Vitalii, a Senior Full Stack Developer who loves building high-performance web and mobile applications. I have hands-on experience leading development projects from architecture design to production deployment, and I specialize in creating scalable systems using modern frameworks like React, Next.js, Node.js, and Python. I am passionate about clean code, performance optimization, and secure engineering. I enjoy bridging business goals with technical execution by translating complex problems into elegant software solutions. I've also mentored junior engineers, integrated CI/CD pipelines, and deployed infrastructure on AWS, always focusing on delivering measurable value.

Available to hire

Hi! I’m Vitalii, a Senior Full Stack Developer who loves building high-performance web and mobile applications. I have hands-on experience leading development projects from architecture design to production deployment, and I specialize in creating scalable systems using modern frameworks like React, Next.js, Node.js, and Python. I am passionate about clean code, performance optimization, and secure engineering.

I enjoy bridging business goals with technical execution by translating complex problems into elegant software solutions. I’ve also mentored junior engineers, integrated CI/CD pipelines, and deployed infrastructure on AWS, always focusing on delivering measurable value.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Advanced

Ukrainian

Advanced

Russian

Advanced

Work Experience

Senior Software Engineer at Miratech

October 1, 2023 - October 31, 2024

Led the development of scalable, high-performance web applications using Next.js, Node.js, and TypeScript, with a focus on performance, accessibility, and enterprise-grade security. Integrated AI-driven features such as intelligent search and recommendation systems using OpenAI APIs and custom-trained ML models. Deployed and maintained infrastructure on AWS (EC2, S3, Lambda, CloudFront), improving availability and scalability globally. Built internal tooling with Python and LangChain to automate QA and deployment workflows. Mentored junior engineers through code reviews and architectural discussions, increasing team velocity by 25%. Implemented GitHub Actions-based CI/CD pipelines, reducing release times by 30% and ensuring smooth DevOps practices.

Software Engineer at RexSoft

June 1, 2021 - September 30, 2023

Spearheaded development of responsive single-page applications with React, Vue.js, and Tailwind CSS, optimizing for performance and Core Web Vitals with 35% faster load times. Architected and implemented server-side rendering with Next.js to enable modular, code-split frontend architecture and seamless SEO performance. Developed smart contract integrations with Ethereum, Solana, and Bitcoin, powering a secure blockchain-based payment platform with 99.98% uptime. Integrated AI tools such as sentiment analysis and user behavior tracking to personalize user experiences and improve engagement. Created reusable design systems and component libraries, streamlining frontend development and improving code consistency by 20%. Collaborated with DevOps to containerize services using Docker and deploy to AWS ECS with robust CloudWatch monitoring.

Backend Developer at 8allocate

October 1, 2019 - April 30, 2021

Built RESTful APIs and backend services in Node.js, Express, and Laravel, supporting high-traffic applications with over 50K daily users. Designed and optimized relational databases (MySQL/PostgreSQL), achieving 30% boost in query performance via indexing and schema refactoring. Implemented JWT-based authentication and role-based access control to ensure secure and compliant data flows. Integrated third-party APIs and created internal analytics dashboards to aid real-time business decision-making. Contributed to migration of legacy PHP services to microservices architecture, improving modularity and deployment flexibility.