Skip to content
Jevon Christopher Loanda

Projects

Selected work

Case studies covering the problem, the constraints and the decisions behind each build. Confidential work is presented without client detail.

5 projects

  • Representative email migration preview using fictional identities, generic systems, and a blocking conflict

    ProfessionalData Integrity2026Confidential

    Email Migration

    A controlled workflow for migrating employee email identities across registered data locations, with preview, conflict checks, guarded execution, verification, audit evidence, and recovery.

    Node.js 22 · Express · MySQL / MariaDB · SQL Server · +2

  • PadelPrice local dashboard separating live marketplace observations from demo observations and labeling demo-only products

    PersonalMarketplace Intelligence2026

    PadelPrice

    A local price-intelligence pipeline for padel rackets: Tokopedia search, deterministic product matching, persistent price observations, scheduled refreshes, and Telegram alerts.

    TypeScript · Next.js · PostgreSQL · Prisma 7 · +5

  • TAYO seat map with seat C2 selected and an active five-minute hold before booking

    PersonalReservation Systems2026

    TAYO

    A bus-booking application with segment-aware seat allocation, PostgreSQL advisory locks, idempotent booking, and temporary seat holds.

    Next.js · React · TypeScript · Go · +2

  • Approved production dashboard showing Email and Telegram activity over a 30-day period, including sent, queued, failed, and validation states

    ProfessionalBackend Infrastructure2025Confidential

    Notification Center

    A production gateway for Email and Telegram notifications, separating API acceptance from asynchronous provider delivery through persistent state, queues, workers, and operational monitoring.

    Node.js · Express · MySQL · Redis · +4

  • Representative Portal HSE architecture showing operational modules feeding Action Management and performance insights

    ProfessionalDomain Workflows2025Confidential

    Portal HSE

    A team-built internal platform where I contributed incident and investigation workflows, inspection and hazard follow-up, centralized Action Management, governance, and cross-module insights.

    Node.js · Express · EJS · MySQL · +2