Wilsen Hernández

Remote, USA

• Full-stack engineer on a HIPAA-compliant, multi-tenant compounding pharmacy management system, spanning dispensing, compounding, and corporate modules.
• Work centered on real-time order processing and pharmacist verification, a granular RBAC and multi-pharmacy tenancy model with pharmacy-scoped and organization-level roles, status-based order permissions, controlled-substance/OTC rules, subdomain tenancy, context switching, and workstation/session handling, plus HIPAA-aligned audit controls including login/logout events, IP/user-agent capture, failed-authorization logging, and PHI redaction. Also built compounding formula/lot, chemical/NDC validation, inventory, recall reporting, billing/invoice/payment, text-to-pay, and outgoing SMS/fax integrations, and drove platform performance work including an Inertia v3 upgrade, N+1 elimination, queue payload reduction, enum/date refactors, and expanded Pest/browser and PHPStan coverage.
• Over 15 months, authored 416 pull requests and 1,400+ commits across 260+ tracked tickets, delivering features end to end with Laravel 13, PHP 8.4/8.5, PostgreSQL 17, Vue 3, Inertia.js, and Tailwind v4.

Remote, USA

• Sole frontend developer of an internal Angular 19 application for managing air-control product catalog across three brands: Pottorff, C&S Air Products, and All-Lite. Working from an empty repository over four months, I designed and built the entire client (routing, layout shells, shared types, and nine feature screens) using standalone components, reactive forms, PrimeNG, and Tailwind CSS. The work centered on access control and data administration: Sanctum bearer-token authentication with auth and guest route guards, admin-only access enforcement, and session persistence that survives reloads.
• Beyond user and sales-representative management with multi-select bulk deletion and account activation, I built the catalog's most complex screen, a louver model editor covering brand-specific model numbers, materials, blade and louver types, AMCA certified ratings, wind-driven-rain performance at two test conditions, pressure coefficients and exponents, maximum section dimensions, and blade specifications, plus validated image and CSV uploads. I owned the production release as well, authoring the Apache configs for SPA routing, HTTPS, and cache control and correcting the Angular prerender and base-href configuration. I also contributed to the accompanying Laravel 12 API, adding bulk-delete endpoints, fixing the user-update route and its unsafe password overwrite, and introducing a Laravel Sail Docker environment for local development.

Remote, Canada

• Backend developer and primary contributor to the multi-tenant Laravel/PHP platform serving both the web application and its mobile scouting app for greenhouse Integrated Pest Management. Over two years, led the design and delivery of the v2 data model and API, replacing the legacy v1 schema with a normalized greenhouse layout model - bays, rows, sections, sides, positions, active and inactive rows, and replanting - alongside observation-week, sticky-card-week and scouting-activity aggregates. Authored the resumable, batched ETL pipeline of 17 Artisan commands that migrated the tenant base from v1 to v2, and built a backwards-compatibility adapter that translated legacy mobile payloads onto the new schema, enabling a per-tenant, feature-flagged rollout instead of a disruptive cutover.
• Designed the offline-first sync and diff API, using per-greenhouse, per-bay and per-library content hashes with a flow-controlled optimized endpoint so the mobile app downloads only changed data. Optimized high-traffic dashboard, pest-insight, map, heatmap and summary endpoints through Redis tag-based cache invalidation, eager loading to eliminate N+1 queries, composite indexes and queued weekly aggregation jobs.
• Delivered the bigger and improved reporting and analytics suite (pest insight, pressure and density, heatmap, sticky-card, application-cost, observation-status and scouting-activity reports) with CSV/Excel exports and scheduled client email reports, and owned the public API in both its v1 JSON/XML and v2 JSON forms, including JWT business-token authentication, OpenAPI/Swagger documentation and Postman collections for third-party integrations.
• Modernized the platform from Lumen to Laravel and through Laravel 12 and PHP 8.0 to 8.4, adopting Octane/Swoole, Pest 3, PHPStan/Larastan, Pint and Rector, and building GitHub Actions and CircleCI pipelines with automated monthly dependency upgrades, Forge deployments, Sentry error tracking and Clockwork profiling. Also implemented multi-tenancy, role-based permissions, business API tokens, terms acceptance, custom fields, demo-tenant provisioning and reset, and localization for five languages. The repository’s top contributor by a wide margin: 2,857 non-merge commits, or 57% of its history and 100% of its 2024 commits, with 379 merged pull requests, 16 releases and roughly +250k/−187k lines across nearly 10,000 file changes.

Remote, Canada

• Backend developer with hands-on ownership of two greenfield Laravel APIs, from architecture and database design through testing, CI/CD and production deployment. Built a clinical-trial matching engine that ingests ClinicalTrials.gov studies on a schedule and matches oncology patients to recruiting trials by biomarkers, disease, line of therapy, phase, age, treatment history and geographic distance using Meilisearch, queued jobs and cached geocoding. Delivered the platform's full REST API with role-based permissions, notifications, English/French localization and multi-sheet Excel reporting. Separately automated a time-and-materials billing workflow through ClickUp webhooks, Hubstaff time tracking, Google Sheets automation and PDF invoice generation. Established engineering standards with Pest, PHPStan, Laravel Pint, GitHub Actions, Redis/Horizon, Sentry and AWS EC2 deployments.

Remote, USA

• Core full-stack engineer on the ground-up rewrite of the multi-tenant client portal for agencies. Worked end to end across Laravel 9 APIs, Vue 3/Inertia interfaces and tenant MySQL schemas, building the client and organization management workspace, the multi-step request lifecycle with drafts, attachments and custom fields, and the billing module with Stripe Connect onboarding, subscriptions, invoices, multi-currency and sales-tax management. Designed the extensions marketplace and its install/update lifecycle, authored 13 of the 14 first-party integrations, and delivered a six-trigger, three-action Zapier integration backed by event-driven webhooks and an automated publish pipeline. Also built portal white-labeling, notifications, announcements, the onboarding-template builder and the client dashboard, implemented policy-based authorization, drove the Laravel Mix to Vite migration (including Open Source contributions to accommodate these changes), and supported the work with 85 Pest test suites plus PHPCS, PHPStan, ESLint and translation-coverage gates in CI.

Valencia, Venezuela

• Full-stack developer on the platform, a B2B operations and e-commerce system for a POS/payment-terminal provider.
• Delivered merchant onboarding and customer support workflows, including taxpayer lookup and queued processing, document upload and verification, contract PDF generation, claims and ticket management, public ticket lookup, and automated email notifications. Built the POS-terminal lifecycle and logistics features — inventory, model/version/bank/carrier catalogs, assignment to merchants, technical service requests, dispatch, and uninstall/reassignment — as well as the collections and payroll disbursement flows: direct-debit authorization letters, Bancrecer fixed-width file generation, bank-response import and rejection handling for multiple Venezuelan banks, scanned-letter storage in AWS S3, Excel/CSV reporting, and daily email summaries.
• Also built the e-commerce checkout (catalog, cart, orders, tracking, 123Pago/Total POS card payments, bank-transfer validation, PDF receipts, and transactional emails), operational dashboards and reports with Chart.js and Excel/PDF exports, and scheduled automation for BCV exchange-rate updates, collections and warranty reports, local and S3 backups with retention, log archiving, sitemap generation, and queue processing. Improved engineering quality by executing the Laravel 5.8 to 8 upgrades, introducing Larastan/PHPStan level 5, PHPUnit feature tests, GitHub Actions CI (PHP 7.4/8.0 + MySQL), enums, observers, policies, and form requests, and by configuring cPanel deployment. Rebuilt and expanded the public corporate/e-commerce site with a new design, SEO metadata and sitemap, legal pages, Google Maps, reCAPTCHA, Tawk.to, and PWA/service-worker support for the admin panel.
• Authored 3,294 commits — approximately 64% of the repository’s history, including 2,200 non-merge commits — across 2,391 files and 91 database migrations, working within a multi-developer team. Was the primary contributor to the Vue 2 back-office SPA (Vuex, Vue Router, BootstrapVue; 90+ components and views) and its JWT-secured REST API (28 controllers and more than 140 endpoints), with role-based access for 19 organizational roles.