Evgheni Velcev

Modernizing a legacy postal mail application: moving it to Laravel 13, MySQL and Vue 3, with a CI/CD pipeline for automated testing and deployment.

• Mapping years of legacy business logic and rebuilding it as clean, testable Laravel modules.
• Organizing the new Laravel modules by domain (entities, value objects, repositories) instead of by framework layer.
• Designing the new MySQL schema and m

Backend development for three products built on a shared modular Laravel blueprint: a logistics management platform, a debt collection system, and an installation management platform for LG heat pumps and air conditioners.

• Delivered backend features across all three products: shipment tracking and warehouse operations, debt-collection workflows and customer communication, technician scheduling

Payments, promotions and authentication in a Symfony microservices platform for Business-Class.com, a US online travel agency for international business- and first-class tickets serving over 100,000 customers a year. One of three backend engineers.

• Built payment service APIs on CQRS with Symfony Messenger over Stripe and Adyen, covering cards, Apple Pay, Google Pay, Affirm, bank transfers and c

Helium 10 is a leading SaaS platform for Amazon sellers. I worked on the data pipeline behind its reporting features, in a team of three developers.

• Replaced a legacy PHP and PostgreSQL report pipeline that kept hitting SP-API throttling with a Laravel service on AWS SQS, S3 and ClickHouse: every Amazon report type for ~800,000 sellers, millions of reports a day.
• Cut data delays for sellers f

Cross-border e-commerce platform behind Pangaea's men's care brands Lumin and Meridian (sales in 70+ countries; Lumin alone reached over 2 million customers), spun off as OpenBorder in 2023. One of three backend engineers in a fully remote US team.

• Helped split a legacy monolith into independent Orders, Promotions and Payments services.
• Built the Payments service: Stripe and PayPal, 10+ curre

Joined the backend team of Pangaea (later renamed OpenBorder), working on the cross-border e-commerce platform. Promoted to Senior Backend Engineer after one year.

Digital shelf analytics for consumer brands such as Procter & Gamble and Samsung: daily price, availability, search rank and review data for ~900,000 Amazon products, with 3 years of history.

• Cut analytics and report calculations from 10–20 minutes to under a minute on ~3 years of daily data (~1B rows) with monthly PostgreSQL partitions and pre-computed aggregation tables.
• Built a database-ba

Full-stack development for makler.md, one of Moldova's largest classified ads platforms.

• Increased sponsored-ad efficiency by more than 30% by building a real-time ad-raising subsystem.
• Developed REST APIs for the ads board.
• Built real-time features in PHP and JavaScript: a long-polling messenger, a "Favorite Ads" subsystem with comments and chat, and live ad updates; moved the frontend bui

Full-stack development on the AdsWizz ad server (based on OpenX): server-side ad delivery and the frontend code that renders ads on publisher sites.

• Built and maintained the frontend ad-rendering code in JavaScript that displays ads on publisher pages.
• Implemented the VAST standard on the ad server, enabling video ad delivery.
• Expanded the ad format library with video and rich media ads.
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