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Selected engineering work

Portfolio of complex web systems

Not just “websites”. This portfolio focuses on LMS, e-commerce, API integrations, custom plugins, production troubleshooting and systems that had to be engineered for reliability.

View case studies Discuss a project
algorithm-studio / portfolioproduction work
01LMS & WordPress
02E-commerce
03API & Integrations
04Reliability
12+ years WordPress / PHP 7 selected cases
12+years in WordPress / PHP
Productionreal systems & support
NDA-safewithout exposing client details
Flagship case

A system, not a single page

Cases are presented as engineering work: challenge → solution → result.

Corporate LMS Platform: Learning, Community & Progress
LMS / WordPress 2026
NDA-safe LMS / WordPress

Corporate LMS Platform: Learning, Community & Progress

Engineering and stabilization of a large production LMS on WordPress: courses, lessons, quizzes, learning groups, interactive exercises, progress, student and teacher dashboards, and external-service integrations.

Role: Senior WordPress / PHP Engineer · architecture, custom development, integrations, production support

Challenge

The platform had evolved over many years and accumulated a large amount of interdependent logic. The critical user path — login → course → lesson → exercise/quiz → completion → progress — depended on multiple plugins, AJAX requests, roles, legacy data, and caching. The goal was to keep delivering new functionality while stabilizing existing workflows without rebuilding the LMS or introducing unnecessary production risk.

Result

The platform gained a more unified and manageable learning experience across roles. External progress is integrated into the student dashboard, group and communication workflows are consolidated, and quiz issues moved from one-off manual fixes to systematic diagnostics and recovery. The key outcome is the ability to keep evolving a complex production LMS without a disruptive platform migration.

WordPressPHPLearnDashWPProQuizBuddyBossGamiPressH5PACF
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Selected work

More selected case studies

E-commerce Platform for a Complex Machinery Catalog
E-commerce / OpenCart 2026

E-commerce Platform for a Complex Machinery Catalog

A custom OpenCart platform for a complex machinery catalog with responsive category/product pages, extended filters, SEO landing pages, managed attributes, badges, warranty, financing logic, and multilingual content.

Result

The catalog became substantially more manageable from the admin panel: attributes, badges, warranty, financing options, SEO landing pages, and part of the display logic no longer require manual template edits. The architecture is prepared for further scaling of categories, filters, and localized landing pages without losing existing production changes.

OpenCart 4.2PHPTwigJavaScriptSEOExtended Filters
View case study → NDA-safe
LMS Integration with an External Progress Tracker
API Integration / LMS 2026

LMS Integration with an External Progress Tracker

A dedicated WordPress plugin connecting LMS users to an external platform, validating authentication, mapping records, synchronizing identifiers, and rendering progress directly in the student dashboard.

Result

External progress became part of a single student experience, so users do not need to switch to another system. Administrative mapping became a controlled workflow with validation, dry runs, and explicit statuses instead of manual ID editing. The integration logic is isolated in a dedicated plugin, allowing it to evolve independently from the theme and LMS templates.

WordPress PluginPHPREST APIAJAXUser MappingBulk Sync
View case study → NDA-safe
LearnDash Quiz Reliability & Integrity Toolkit
Reliability / Troubleshooting 2026

LearnDash Quiz Reliability & Integrity Toolkit

Diagnostics and recovery tooling for production quizzes where question relations, autosave/resume, or attempt finalization could lose integrity because of legacy data and unstable runtime flows.

Result

Problem quizzes can be checked through a repeatable procedure, relation gaps can be detected, and repairs can be performed through tooling. This reduces dependence on one-off SQL/manual fixes and provides a reusable process for future incidents. Part of the runtime configuration was also stabilized, while attempt diagnostics became more transparent for further analysis.

LearnDashWPProQuizWordPress PluginPHPMariaDBDiagnostics
View case study → NDA-safe
Multilingual Shopify Catalog & Safe Update Pipeline
Shopify / Data Migration 2026

Multilingual Shopify Catalog & Safe Update Pipeline

Preparation, normalization, and QA of Shopify catalogs: complete title/description translations, detection of leftover source-language text, product mapping, and isolated price/quantity update files that avoid overwriting unrelated content.

Result

Content and operational updates are separated into independent workflows. Translations can be reviewed and updated separately, while prices and stock can be changed through a minimal file without rewriting already-correct content. This makes recurring catalog maintenance more predictable and reduces the risk of accidental changes during bulk imports.

ShopifyCSVXLSXData MappingLocalizationQA
View case study → NDA-safe
E-commerce Form & Payment Flow Protection at Edge + Backend
Security / E-commerce 2026

E-commerce Form & Payment Flow Protection at Edge + Backend

Layered anti-spam and edge security for an online store with quick-order/checkout forms and payment callbacks: Cloudflare rules, payment-route exceptions, rate limiting, and server-side data validation.

Result

Form protection and payment flow are separated so they do not compete with each other: critical callback scenarios follow dedicated rules, while invalid submissions are filtered at the backend layer. The approach can be extended with new rules without weakening protection for the entire site because of a single checkout scenario.

CloudflarePHPOpenCartWAFRate LimitingAnti-spam
View case study → NDA-safe
E-commerce / LMS Automation
E-commerce / LMS Automation 2026

Course Store with Automated LMS Enrollment

A public micro-course store on the main website connected to the learning academy: after purchase, the student receives access to the corresponding LMS course without a separate manual enrollment step.

Result

The student follows one clear journey: choose a course on the public site, purchase it, and receive access to the corresponding learning content in the Academy. For the team, this removes a separate manual enrollment step and turns the course store into a real entry point to the LMS rather than a catalog with payment only.

WordPressPHPCourse ShopLearnDashLMSEnrollment Sync
View case study → NDA-safe
How work is presented

Portfolio without marketing noise

01

Challenge

What was wrong with the system and why a standard solution was not enough.

02

Engineering

Architecture, integrations, code, migrations and a production-safe approach.

03

Result

What became more stable, manageable or easier for the team and end user.

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