Ілона

Ilona Landar
Magento Tech Lead / Senior Full Stack Developer
Email [open contact info](look above in the "contact info" section)

Ukrainian – Native
Languages
English – Advanced (C1)

Phone [open contact info](look above in the "contact info" section)

1 Professional Summary

Experienced Magento Tech Lead and Senior Full Stack Developer with 7+ years of experience in
B2B and B2C e-commerce development, architecture, performance optimization, and accessibility.
Contributed to approximately 26 projects, leading technical initiatives, delivering scalable solutions,
mentoring developers, and maintaining high coding standards throughout the development
lifecycle.
Claude Certified Developer with hands-on experience in LLM-powered applications, RAG, context
engineering, AI security, and LLMOps. Combines strong software engineering expertise with
modern AI development practices to build reliable, scalable, and cost-efficient solutions.

2 Technical Skills and Certifications

E-commerce: Magento 1 & 2, Adobe Commerce, Hyvä Themes, Custom Modules, B2B/B2C,
Multi-store, Payment Integrations
Backend & APIs: PHP, Node.js, Express.js, REST, GraphQL, SQL, MySQL, MariaDB, API
Integrations
Frontend: JavaScript, TypeScript, React, Next.js, Alpine.js, jQuery, Underscore, KnockoutJS,
RequireJS, XML, HTML5, CSS3, SCSS, Less, Tailwind CSS, Bootstrap
AI Engineering & Agentic Systems: ChatGPT, Claude Code, Claude AI, Claude API, LLM APIs,
AI Agents, Agent Architecture, Agentic Workflows, RAG, Embeddings, Model Context Protocol
(MCP), Tool Calling, Context Engineering, Prompt Engineering, Structured Outputs
LLMOps & AI Security: Model Selection, Token & Cost Optimization, Prompt Caching, Evaluation
& Monitoring, Guardrails, Prompt Injection Protection, Validation, Fallback Strategies, Server-Sent
Events (SSE), WebSockets
Tools & Development: Git, Docker, Composer, NPM, Grunt, Gulp, New Relic, Figma, Photoshop,
Sketch, Jira, Contentful

Certifications:
● Claude Certified Developer - Foundations | Anthropic (2026)
● Adobe Certified Expert - Adobe Commerce Front End Developer
● Adobe Certified Expert - Adobe Commerce JavaScript Developer
● Anthropic Academy - 11 Certificates of Completion (Claude AI)

3 Professional Experience

Period and Location: April 2025 – August 2026, Kyiv, Ukraine

Company and Position: Sprinterra, Magento Tech Lead | Full Stack Developer

Responsibilities: - Led the technical direction of a Magento 1 to Magento 2 migration,
defining architecture and implementation strategy.
- Designed and developed complex Magento 2 frontend and backend
features, including custom modules, plugins, observers, UI
components, ViewModels, GraphQL, and REST API integrations.
- Integrated and customized payment solutions, including Braintree,
PayPal, and Affirm.
- Designed and optimized search, filtering, layered navigation, PLP,
and PDP functionality for complex product catalogs.
- Investigated and resolved production issues involving caching,
indexing, APIs, CSP, frontend rendering, and performance
bottlenecks.
- Improved frontend performance and Core Web Vitals through
JavaScript optimization, lazy loading, rendering improvements, and
CLS fixes.
- Designed and developed AI-powered Diamond Helper functionality
using LLM APIs, RAG, embeddings, structured outputs, intent
validation, caching, fallback strategies, and prompt-injection
protection.
- Applied LLMOps practices, including context and prompt
engineering, response validation, evaluation, monitoring, and token
cost optimization to improve the reliability and efficiency of
AI-powered functionality.
- Performed code reviews, established development standards, and
mentored developers.
- Collaborated with product owners, designers, QA, and business
stakeholders on scalable technical solutions and architecture.
- Prepared technical documentation and architecture proposals.

Period and Location: June 2019 – January 2025, Kyiv, Ukraine

Company and Position: Konsol Studio, Magento Frontend Developer

Responsibilities: - Developed and maintained Magento e-commerce solutions,
including custom Magento and Hyvä themes using Alpine.js and
Tailwind CSS.
- Built reusable CMS components, widgets, JavaScript mixins,
ViewModels, UI components, and setup/upgrade functionality.
- Improved frontend performance, Core Web Vitals, and accessibility
by resolving rendering and performance bottlenecks.
- Developed B2B and multi-store functionality and integrated
third-party services including Algolia, Amasty, Klevu, WeSupply,
external APIs, Google Analytics, and Google Maps.
- Participated in Magento 1 to Magento 2 migrations, code refactoring,
debugging, and optimization.
- Conducted code reviews, prepared technical documentation, and
trained junior developers.