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dyllan_ost

Dyllan O.

@dyllan_ost

Senior Software Engineer

Stati Uniti
Inglese
Alcune informazioni sono riportate in lingua inglese.
Chi sono
Hi, I’m a reliable and results-driven Software Developer specializing in web applications, mobile apps, and custom software solutions. I help startups, entrepreneurs, and businesses turn ideas into scalable, high-performance digital products. I work across frontend, backend, APIs, and databases to deliver clean, secure, and maintainable code. Whether you need a business web app, a mobile application, or a full SaaS platform, I focus on functionality, performance, and user experience. If you’re looking for a developer who communicates clearly and delivers on time, message me to get started.... Continua a leggere

Competenze

d
dyllan_ost
Dyllan O.
offline • 
Tempo di risposta medio: 50 ore

Consulta i miei servizi

Applicazioni web full stack
I will develop web application, mobile app, custom software, and scalable solutions
A partire da150 USD / progettoMaggiori dettagli
Sviluppo multipiattaforma
I will build your cross platform app with flutter and react native
A partire da150 USD / progettoMaggiori dettagli

Portfolio

Esperienza lavorativa

Indeed.com

Senior Full-Stack Software Engineer

Indeed.com • Full time

May 2022 - Oct 2025 • 3 yrs 5 mos

Key Achievements & Responsibilities: Architected and deployed a scalable financial dashboard platform, designing both a responsive React/TypeScript frontend and a high-performance Node.js/Express API that handles complex financial data for over 10,000 daily active users. Redesigned core database architecture, migrating from a monolithic structure to PostgreSQL with optimized indexing and query batching. This resulted in a 45% reduction in average API response time (from 400ms to under 220ms). Led the end-to-end integration of third-party payment processing, implementing a secure, event-driven architecture using AWS SQS and Lambdas, which improved checkout throughput by 3x and eliminated timeout failures during peak financial transactions. Directed the migration of legacy microservices to a containerized environment using Docker and Kubernetes on AWS (EKS), enhancing system resilience and reducing per-service deployment time from 45 minutes to 8 minutes. Spearheaded the implementation of a role-based access control (RBAC) system with OAuth 2.0 and encrypted data storage, ensuring full compliance with financial industry security standards for handling sensitive user PII and financial records