Stephen Ampong
Full Stack Dev | API Integration, Automation & Blockchain
New to Contra
Stephen is ready for their next project!
The idea of this mobile app is to help college students create and read notes in pdf and audio format , add courses and associate courses with attractive display pictures to stimulate interest in the courses they offer in their colleges with the ability to add reminders for their lecture times.
I contributed to the full frontend and backend development, with part contribution in system analysis and design. The app was launched to the android playstore in 2018.
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Built production algorithmic trading platform serving 1,000+ users with 99.9% uptime. Serverless AWS architecture (Lambda, DynamoDB, EventBridge) processes $2.4M monthly volume at 90% lower cost than traditional servers ($350/month vs $8,000+). React dashboard with real-time WebSocket updates. Implemented 4 trading strategies with backtesting engine. Automated CI/CD pipeline deploys in 8 minutes. Achieved <100ms API latency globally and <50ms WebSocket delivery. Complete with 400+ pages documentation, comprehensive test suite, and multi-environment deployment (dev/staging/production).
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Built a production-ready social networking platform on AWS serverless infrastructure handling 150,000 concurrent users. Implemented event-driven architecture with 32 Lambda functions, single-table DynamoDB design achieving <10ms queries, and real-time features via GraphQL subscriptions. Delivered complete platform with news feed, messaging, search, notifications, and privacy controls. Achieved 99.9% uptime with infrastructure costs under $200/month (90% savings vs traditional). Impact: Sub-500ms p95 latency, 1M+ posts/day capacity, GDPR compliance, comprehensive documentation.
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AmpoDApp is a comprehensive, production-ready blockchain DApp platform that unifies token creation, NFT minting, DEX trading, and DeFi staking into a single, intuitive interface. Designed for both institutional and retail users, it demonstrates how enterprise-grade security meets consumer-friendly UX in Web3
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