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I'm a Senior Full Stack Engineer with 12+ years of experience delivering scalable, business-critical applications for startups and global enterprises. I specialize in the MERN stack, Node.js microservices, and AWS cloud infrastructure. I thrive on end-to-end ownership—gathering requirements, translating business processes into workflows, designing schemas and APIs, building React front ends, writing tests, and deploying to AWS with CI/CD. I enjoy balancing technical excellence with business impact and collaborating with product, design, and QA to ship high-quality solutions.…I'm a Senior Full Stack Engineer with 12+ years of experience delivering scalable, business-critical applications for startups and global enterprises. I specialize in the MERN stack, Node.js microservices, and AWS cloud infrastructure. I thrive on end-to-end ownership—gathering requirements, translating business processes into workflows, designing schemas and APIs, building React front ends, writing tests, and deploying to AWS with CI/CD. I enjoy balancing technical excellence with business impact and collaborating with product, design, and QA to ship high-quality solutions.

George Mylonas

Web Developer, Front-End Developer, Back-End Developer, +2

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I'm a Senior Full Stack Engineer with 12+ years of experience delivering scalable, business-critical applications for startups and global enterprises. I specialize in the MERN stack, Node.js microservices, and AWS cloud infrastructure. I thrive on end-to-end ownership—gathering requirements, translating business processes into workflows, designing schemas and APIs, building React front ends, writing tests, and deploying to AWS with CI/CD. I enjoy balancing technical excellence with business impact and collaborating with product, design, and QA to ship high-quality solutions.…I'm a Senior Full Stack Engineer with 12+ years of experience delivering scalable, business-critical applications for startups and global enterprises. I specialize in the MERN stack, Node.js microservices, and AWS cloud infrastructure. I thrive on end-to-end ownership—gathering requirements, translating business processes into workflows, designing schemas and APIs, building React front ends, writing tests, and deploying to AWS with CI/CD. I enjoy balancing technical excellence with business impact and collaborating with product, design, and QA to ship high-quality solutions.

Available to hire

I’m a Senior Full Stack Engineer with 12+ years of experience delivering scalable, business-critical applications for startups and global enterprises. I specialize in the MERN stack, Node.js microservices, and AWS cloud infrastructure.

I thrive on end-to-end ownership—gathering requirements, translating business processes into workflows, designing schemas and APIs, building React front ends, writing tests, and deploying to AWS with CI/CD. I enjoy balancing technical excellence with business impact and collaborating with product, design, and QA to ship high-quality solutions.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Fluent

Greek, Modern

Fluent

Russian

Fluent

Spanish; Castilian

Intermediate

Work Experience

Lead Full Stack Engineer at KOMI (Series A Startup)

September 1, 2025 - September 1, 2025

Led architecture and modernization of KOMI’s creator platform used by global talent and brands. Migrated Node.js microservices and React 16/17 apps into a unified React 19 monorepo with shared npm component libraries and Storybook. Designed scalable MERN-based systems across MongoDB, Redis, Postgres and AWS, ensuring performance and maintainability. Implemented comprehensive test coverage with Jest and React Testing Library across APIs and front-end features, driving a strong testing culture. Collaborated with Product, Design and QA to ship pixel-perfect UI and validated releases through end-to-end test automation.

Lead Full Stack Engineer at KOMI

September 1, 2025 - September 1, 2025

Led the architecture and modernization of KOMI’s creator platform used by global talent and brands. Migrated Node.js microservices and React 16/17 apps into a unified React 19 monorepo with shared npm component libraries and Storybook. Designed scalable MERN stack systems with Redis, PostgreSQL, and AWS, ensuring performance and maintainability. Implemented end-to-end test coverage with Jest and React Testing Library across APIs, components, and front-end features, fostering a strong testing culture. Collaborated with Product, Design, and QA to ship pixel-perfect UI and validated releases through automated E2E tests. Tech stack: MERN stack, Next.js, NestJS, TypeScript, Storybook, CircleCI, Postgres, Redis, AWS.

Senior Developer at Channel 5 & UKTV (UIC Digital)

April 1, 2025 - April 1, 2025

Upgraded React applications (v16 → v18.3) and delivered major UI rebrands for Channel 5 and UKTV. Rebuilt the UKTV platform from the ground up with Next.js, implementing modern best practices and library choices for performance. Built a complete Cypress E2E suite from scratch, improving release confidence and regression coverage. Delivered performant UI components from Figma designs, collaborating closely with stakeholders under tight deadlines. Developed a React Native beta mobile app to evaluate framework capabilities and benchmark performance against native apps. Wrote unit and integration tests using Jest and React Testing Library across new features.

Lead Developer & Solution Architect at BeUltra (Startup)

October 1, 2024 - October 1, 2024

Led development and solution architecture, building applications from the ground up. Designed and deployed a project management tool with React, Node.js, NestJS, and Postgres, integrated with JIRA APIs. Built AI-powered Shopify integrations using OpenAI for automated A/B testing and personalization, with content served via Contentful + GraphQL. Automated CI/CD workflows with GitHub Actions and deployed to AWS/Heroku using Docker and Kubernetes.

Senior Developer at Intrepid (NHS Project)

November 1, 2021 - November 1, 2021

Developed a mobile + admin platform for NHS clinical trials, with gamification, booking systems, push notifications, and CMS integration. Built React dashboards with role-based permissions and APIs powered by .NET.

Senior Developer at SongStats

May 1, 2021 - May 1, 2021

Built analytics dashboards and a React Native mobile app for the music industry, consuming APIs from Spotify, YouTube, TikTok, and Apple Music. Optimized backend queries in Postgres, improving data fetching speeds by 50%. Implemented caching that reduced page load times by 80% across analytics dashboards. Developed rich data visualizations (amCharts) and optimized API consumption at scale.

Senior Developer at ElectroRent (via Dauntless Digital & Direct Contract)

March 1, 2020 - March 1, 2020

Led architecture and development of ElectroRent’s SaaS rental platform across two phases: initially at Dauntless Digital (as lead agency developer) and later directly at ElectroRent. Spent 2+ years building and scaling the platform, supporting enterprise clients such as NASA, IBM, and Huawei. Owned end-to-end delivery: requirements gathering with product owners, mapping business processes into workflows, architecting databases (MariaDB), APIs, microservices, and React front-end solutions. Implemented complex RBAC and permissions. Set up CI/CD pipelines and automated testing with Jest and React Testing Library in Azure DevOps and Docker, delivering reliable releases across QA, staging, and production. Acted as a bridge between business and technology, translating stakeholder needs into technical deliverables and guiding MVP rollout.

Senior/Lead Developer at Various Agencies/Startups

January 1, 2018 - January 1, 2018

Led architecture and delivery of applications using React, Node.js, Laravel, Symfony, AWS, and headless CMS solutions, with a strong focus on scalability, testing, and client collaboration.