Amir Zahlan

About

Senior Frontend Engineer and Developer with 5+ years of experience building and scaling production web applications. Strong expertise in React, Next.js, and modern UI systems, with hands-on ownership of products from concept to production. Proven track record integrating Stripe, GraphQL, and PostgreSQL, optimizing performance, and delivering reliable solutions in fully remote, distributed teams.

Experience

• Senior Frontend Engineer12-01-2024

  Designed, built, and launched multiple production SaaS products end-to-end, owning frontend architecture, UX decisions, and technical execution. Led the development of loterizador.com, webquestoes.com, and sendnext.app from concept to live production, including authentication flows, dashboards, and subscription-based features. Built scalable and maintainable applications using React, Next.js, Tailwind CSS, and shadcn/ui, with strong focus on performance, consistency, and long-term maintainability. Integrated Stripe subscriptions and billing systems, supporting recurring payments, plan upgrades, and lifecycle management. Implemented complex user flows aligned with business requirements and real-world usage patterns. Integrated Instagram Graph API to enable automated workflows and data-driven features. Managed deployments, environment configuration, and production readiness for remote SaaS products.

• Senior Frontend / Full Stack Engineer · Scalable Path06-01-2022 – 12-01-2023

  Contributed as a senior contractor to a production Shopify ecosystem supporting both web App and POS workflows. Developed and shipped scalable frontend features using React and Next.js, with strong focus on performance and reliability. Integrated and optimized GraphQL data fetching using Apollo, significantly reducing DatoCMS API consumption and improving application responsiveness. Modeled and rendered dynamic content using DatoCMS across customer-facing and internal tools. Built interfaces using Shopify Polaris Web Components, aligned with Shopify’s design system and UX standards. Contributed to Shopify POS-related features, supporting omnichannel retail flows. Implemented data visualizations to support business and operational insights. Collaborated daily with backend engineers working with Ruby on Rails in a fully distributed, remote team.

• Frontend Engineer · Performa_IT09-01-2020 – 02-01-2022

  Built and maintained complex frontend applications for financial, production, and logistics platforms. Developed reusable UI components and shared libraries using Angular and NGXS, improving consistency and maintainability across applications. Collaborated closely with backend engineers and stakeholders to translate business requirements into scalable frontend solutions. Implemented interactive dashboards and data visualizations using ApexCharts and Chart.js. Improved UI consistency, performance, and long-term maintainability in multiple production systems. Worked in an agile, fully remote environment delivering high-quality frontend solutions.

• Independent Product & Operations Project11-01-2018 – 08-01-2020

  Founded and operated a small food delivery business focused on Arabic and Brazilian cuisine, managing sourcing, production, pricing, and daily operations. Designed and built a custom web application to calculate recipes, track costs, manage inventory, and optimize yields. Used the application to support operational decisions based on real production and sales data. Recently revisited and modernized the system, improving accuracy, usability, and data consistency. Gained hands-on experience bridging software development, operations, and real-world business constraints.

• Full Stack Engineer · W3 Automação e Sistemas11-01-2017 – 10-01-2018

  Developed full-stack features for public-facing financial platforms, working across frontend and backend systems. Integrated APIs with ATM hardware using J/XFS to enable secure, real-time operations. Implemented secure data exchange and compliance-related integrations with the Central Bank. Built responsive user interfaces and scalable services using React, Vue.js (Quasar), and Node.js. Designed and built an ATM simulator using Unity3D to replicate real-world banking workflows. Collaborated with cross-functional teams to deliver reliable features under regulatory constraints.

Education

• Instituto de Estudos Superiores da Amazônia - IESAMBachelor of Engineering (B.E.), Computer Engineering
• Universidade Federal do ParáMaster's degree, Neurobiology and Neurosciences
• EstácioPostgraduate Degree, Computer Software Engineering
• freeCodeCampFull Stack Web Development Certification, Computer Software Engineering

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