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I'm Arnold Durazo, a Senior MERN Stack Engineer with 9+ years of experience building web and mobile applications. I have led backend teams on enterprise SaaS projects and specialize in Node.js, MongoDB, and React/React Native, with additional work in Python, cloud-native architectures, AWS deployments, and CI/CD. I value mentoring, clear communication, clean system design, and close collaboration with product, QA, and stakeholders to deliver scalable, secure fintech and enterprise solutions. I enjoy turning complex requirements into robust services and empowering teams to move fast with quality.…I'm Arnold Durazo, a Senior MERN Stack Engineer with 9+ years of experience building web and mobile applications. I have led backend teams on enterprise SaaS projects and specialize in Node.js, MongoDB, and React/React Native, with additional work in Python, cloud-native architectures, AWS deployments, and CI/CD. I value mentoring, clear communication, clean system design, and close collaboration with product, QA, and stakeholders to deliver scalable, secure fintech and enterprise solutions. I enjoy turning complex requirements into robust services and empowering teams to move fast with quality.

Arnold Durazo

Full Stack Developer, Front-End Developer, Back-End Developer, +5

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I'm Arnold Durazo, a Senior MERN Stack Engineer with 9+ years of experience building web and mobile applications. I have led backend teams on enterprise SaaS projects and specialize in Node.js, MongoDB, and React/React Native, with additional work in Python, cloud-native architectures, AWS deployments, and CI/CD. I value mentoring, clear communication, clean system design, and close collaboration with product, QA, and stakeholders to deliver scalable, secure fintech and enterprise solutions. I enjoy turning complex requirements into robust services and empowering teams to move fast with quality.…I'm Arnold Durazo, a Senior MERN Stack Engineer with 9+ years of experience building web and mobile applications. I have led backend teams on enterprise SaaS projects and specialize in Node.js, MongoDB, and React/React Native, with additional work in Python, cloud-native architectures, AWS deployments, and CI/CD. I value mentoring, clear communication, clean system design, and close collaboration with product, QA, and stakeholders to deliver scalable, secure fintech and enterprise solutions. I enjoy turning complex requirements into robust services and empowering teams to move fast with quality.

Available to hire

I’m Arnold Durazo, a Senior MERN Stack Engineer with 9+ years of experience building web and mobile applications. I have led backend teams on enterprise SaaS projects and specialize in Node.js, MongoDB, and React/React Native, with additional work in Python, cloud-native architectures, AWS deployments, and CI/CD.

I value mentoring, clear communication, clean system design, and close collaboration with product, QA, and stakeholders to deliver scalable, secure fintech and enterprise solutions. I enjoy turning complex requirements into robust services and empowering teams to move fast with quality.

Skills

Experience Level

Expert

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Language

English

Fluent

Work Experience

Senior MERN Stack Engineer at Zibtek

November 1, 2019 - October 1, 2022

Led full-stack development for a Laravel-based e-commerce and fintech-oriented platform. Designed and delivered scalable frontend systems using React, Next.js, and TypeScript; built a reusable component library and standardized UI patterns across payroll, lending, and reporting modules, including real-time dashboards. Built secure REST APIs, integrated with Redis, RabbitMQ, and other backend services, and implemented frontend flows with JWT and RBAC to enforce fintech compliance. Split the system into microservices deployed with Docker and Kubernetes (EKS), created CI/CD pipelines, and reduced release time by 50%.

Full Stack Developer at SnackPass

April 1, 2018 - September 1, 2019

Built a Laravel-based e-commerce backend and React Native mobile frontend for a food ordering app, plus a Next.js web admin portal for restaurant management. Developed reusable UI components and screens to support both customer and restaurant workflows, implemented multi-restaurant menus and item modifiers, and integrated Stripe for payments. Optimized for 70k+ daily menu views and improved overall order flow and visibility.

Frontend Developer at Sift

June 1, 2017 - March 1, 2018

Focused on frontend development using Angular and TypeScript for 3+ modules, including reporting, portfolio management, and transaction tooling. Built reusable UI components, integrated backend APIs, and implemented secure authentication with role-based access controls. Improved internal reporting efficiency with enhanced data visualization and UI responsiveness; leveraged Nx workspaces and RxJS for state management and dashboards.

Full Stack Engineer at Zibtek

November 1, 2019 - October 1, 2022

Led frontend and backend development for client projects, built scalable frontend architectures with React/Next.js and Node.js/Express, implemented secure authentication (JWT/RBAC), and collaborated with design and QA teams to deliver enterprise SaaS features.

Full Stack Developer at Sift

June 1, 2017 - March 1, 2018

Focused on frontend development using Angular and TypeScript for multiple modules, built reusable UI components, implemented NGRx/RxJS dashboards, and integrated backend APIs to improve data visualization and UX.

Lead Full Stack Engineer at Oracle

February 1, 2023 - April 1, 2026

Led a Node.js backend team of 6 engineers for Oracle’s enterprise fintech SaaS platform, building integration and orchestration services for payment workflows, transaction processing, and bank integrations. Focused on mentoring, documentation, and cross-team collaboration, accelerating onboarding and improving team autonomy. Built secure REST APIs for financial workflows, reconciliation, and payment orchestration; added retries, idempotency, and failure handling; split system into microservices for payroll, lending, reporting, and user management. Deployed with Docker, Kubernetes (EKS), and AWS (RDS, S3, CloudWatch); implemented RBAC, JWT auth, encryption (KMS), and audit logging. Set up CI/CD pipelines with GitHub Actions, delivering payroll scheduling, loan underwriting, and real-time status updates via WebSocket and Redis; optimized query and index usage for high-volume processing.

Software Developer at Sift

June 1, 2017 - March 1, 2018

Implemented Node.js APIs with MySQL to deliver financial metrics and transaction data to React UI, reducing data retrieval time by 30%. Contributed to frontend development with JavaScript, React, and Angular across 3+ financial modules; built reusable UI components and optimized data visualization for decision-making efficiency.