RAIHAN OZA

• Architected and delivered multiple production-grade internal web platforms using Next.js (TypeScript) and NestJS, supporting core export-cargo and HR business operations.
• Built an internal ERP application for export cargo shipping that centralized loading data, operational records, and approval workflows, eliminating manual spreadsheet tracking and improving data accuracy across operations teams.
• Designed and shipped a Human Resource Management System (HRMS) serving 100+ employees, covering employee data, leave requests, multi-level approvals, and automated leave-balance tracking, replacing fragmented manual processes.
• Built a WhatsApp Bot monitoring service that performs continuous uptime checks on internal websites and servers, cutting incident response time from ~30 minutes to under 5 by pushing real-time outage alerts to on-call groups.
• Modeled and optimized Microsoft SQL Server schemas for high-volume operational data through indexing strategies, query tuning, and stored procedures, reducing query response times by 50%+.
• Implemented predictable state management with Redux across complex multi-module frontends, improving maintainability and reducing prop-drilling across feature teams.
• Owned the full software development lifecycle — requirement analysis, system design, implementation, testing, deployment, and post-release maintenance — collaborating with operations and HR stakeholders to translate business needs into scalable technical solutions.

• Collaborated with 5 cross-functional teams to design and ship public-facing digital services helping citizens check social assistance status and access government programs.
• Built a responsive social-assistance status portal using React.js, TypeScript, Zustand, Tailwind CSS, and shadcn/ui, serving the general public with a clean and accessible UX.
• Developed the Aplans Booster web platform with React.js, React Query, Tailwind CSS, and TypeScript; integrated REST APIs via Postman and contributed to sprint planning and feature prioritization.
• Built the Aplans Verivali mobile app using React Native, Redux, and React Query for field officers to verify and validate aid recipient data on-site.
• Standardized the frontend codebase by introducing ESLint and Prettier configurations, improving code consistency across multiple repositories and reducing review friction.
• Drove engineering best practices through code reviews, CI/CD pipelines, and internal knowledge-sharing sessions presented to fellow engineers.

• Delivered multiple production web and mobile applications for official Indonesian government services using Next.js, Laravel, React Native, Tailwind CSS, Zustand, Redux, and React Query.
• Built admin dashboards with CRUD modules, role-based access control, and complex reporting views adopted by internal operators.
• Optimized mobile application performance across a wide range of Android devices, improving load times and delivering a smoother user experience.
• Maintained existing codebases through regular security patches, dependency upgrades, and performance refactors to keep applications stable in production.
• Partnered with product, design, and backend teams to translate business requirements into technical specifications and ship features on schedule.

• Developed and launched the "Balitaku" React Native mobile app in just 2 months — a maternal-health support tool integrated with a QR-code system used across municipal services.
• Built a CMS-style web platform enabling the Medan city government to spin up dedicated sub-sites for individual municipal services, accelerating digital service rollout.
• Supported and integrated data for 100+ users across departments, enabling smoother cross-application data flow.
• Wrote clean, typed React + TypeScript code with a strong focus on web performance and reusability.

• Built and maintained the core pawnshop management system (PHP, Laravel, Bootstrap) serving 10+ outlets across North Sumatra and handling 100+ transactions per day.
• Improved system usability and workflow ergonomics for branch operators, contributing to a 40% increase in transaction throughput.
• Resolved production issues with fast turnaround to maintain business continuity, earning consistent positive feedback from end users.

React.js, TypeScript, Tailwind CSS, Node.js, Express.js, PostgreSQL, JWT · Solo Project

• Single-handedly designed, developed, and deployed an end-to-end finance management platform covering frontend, backend, and DevOps.
• Built secure REST APIs with Node.js + Express.js and PostgreSQL, implementing JWT authentication, role-based access control, and encryption for sensitive financial data.
• Set up monitoring and structured logging to ensure continuous uptime, faster debugging, and a strong security posture.

React.js, Vite, React Query, shadcn/ui, Zustand, Tailwind CSS, Laravel · Government Service

• Designed a clean, user-friendly interface for citizens to submit forms and review submission history.
• Collaborated with UI/UX designers and backend engineers to ship a responsive, accessible web product.

React Native, Zustand, React Query, WhatsApp Gateway · Government Service

• Built a mobile tool for officers to verify and validate aid-recipient data directly in the field.
• Integrated a WhatsApp Gateway for OTP delivery and real-time field communication.

React Native, Express.js, React Query, WhatsApp Gateway · Municipal Health Service

• Developed a mobile app supporting stunting-prevention programs for infants in Medan, providing curated health information for mothers.
• Implemented WhatsApp-based OTP authentication for secure, friction-free onboarding.

React Native · Medan Tourism Office

• Shipped a selfie-based attendance application for tourism office employees, simplifying daily check-ins through device camera integration.