I build cloud-native products that ship fast, scale cleanly, and stay reliable.
I’m Harry Revisios, a Full-Stack Engineer with 7+ years of experience building high-traffic web and mobile products in product-led environments. I specialize in TypeScript, React/Next.js, and AWS serverless architectures, with strong experience in Stripe payments, subscriptions, and event-driven systems.
Core focus
AWS Lambda · DynamoDB · AppSync
Event-driven EventBridge · SQS
Payments Stripe · Subscriptions
Frontend React · Next.js
Mobile React Native (iOS)
Based in
Core Expertise.
Cloud-native & event-driven
AWS serverless architecture
Lambda, API Gateway, AppSync, DynamoDB, EventBridge, SQS, S3 with a focus on reliability and cost efficiency.
Event-driven systems
Asynchronous workflows, idempotent handlers, retries, and observability for real-world production behavior.
Infrastructure as code
AWS CDK for repeatable environments, safe deployments, and maintainable stacks.
Product Engineering
Payments & Subscriptions
Stripe Checkout + Payment Intents, subscription lifecycles, webhooks, and consistent customer state.
TypeScript-first frontend
React, Next.js, modern state/data patterns, component systems, and performance-focused UI delivery.
Performance & monitoring
Pragmatic instrumentation, failure-mode thinking, and optimization where it matters (latency, throughput, UX).
My Experience.
03/2024 – 01/2026
Cloud Touchless Massage · NY, USA (Remote)
Full-Stack Engineer
Built a centralized AWS serverless stack handling high-traffic, customer-facing workloads with 99.9% uptime. Developed a React Native iOS app deployed across 15 iPads enabling real-time massage chair control, reducing staff workload by 80%. Created a Next.js web app with Stripe billing, processing hundreds of payments daily. Implemented 60-second heartbeat checks and reliability patterns, cutting downtime by 90%.
09/2020 – 02/2024
Authoritive Inc. · New York, USA (Remote)
Full-Stack Engineer
Led frontend development for a microlearning SaaS used by 30+ authors to convert content into interactive programs. Built key features like a drag-and-drop editor and checkout builder, reducing publishing time by 70%. Contributed to serverless backend services with 99.9% uptime powering thousands of daily deliveries. Implemented multi-channel delivery (SMS, WhatsApp, MS Teams) reaching 3,000+ active users.
10/2015 – 09/2020
Freelance · Larissa, Greece
Web Developer
Built and launched 10+ mobile-first websites for local businesses. Applied SEO best practices, boosting traffic by 30% in three months. Optimized performance, cutting load times by 40% and improving UX.
Selected Work.
Two flagship systems that best represent how I think about product engineering, architecture, and production reliability. If you want more, link out from these case studies instead of listing many smaller projects.
Cloud Touchless Massage
AWS Serverless
Real-time control
Stripe Billing
React Native
• Centralized serverless platform supporting high-traffic customer sessions with 99.9% uptime.
• React Native iOS app across 15 iPads enabling real-time chair control, reducing staff workload by 80%.
• Stripe integration for memberships + day passes, processing hundreds of payments daily.
• Heartbeat monitoring and resilience patterns reducing downtime by 90%.
Authoritive Self-Service Platform
Microlearning SaaS
React/Next.js
AWS Serverless
GraphQL
• Frontend lead for a microlearning SaaS used by 30+ authors.
• Built drag-and-drop editor and checkout builder, reducing publishing time by 70%.
• Serverless backend (Lambda, DynamoDB, AppSync, S3) with 99.9% uptime powering thousands of daily deliveries.
• Multi-channel delivery reaching 3,000+ active users (SMS, WhatsApp, MS Teams).
Maintained repos.
Small utilities and libraries I use in real projects. These are actively maintained and kept intentionally focused.
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Reach out.
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Links
What I'm looking for
Product teams that value strong engineering fundamentals: type safety, clean architecture, observability, and disciplined delivery.
Education
BSc (Hons) Computer Science · Mediterranean College (In progress)
Languages: Greek (Native), English (Fluent C2)