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Viktor Tsepliaiev

@viktortsepliaiev

Software Engineer building e-commerce platforms, including an Order Discounts Engine and Kafka integrations for a high-volume marketplace.

Ukraine

Message

On an e-commerce platform serving retail and marketplace needs, I developed and launched Merchant Center and built an Order Discounts Engine with layered discount recalculation and receipt generation. I also integrated WMS and TMS through Kafka and optimized complex SQL queries.

Across my work at Shopify Core Team (EPAM), Marathon Health (EPAM), Rocket Delivery (Raketa app), and myHomeIQ (ex SOALabs (ex Loomlogic)), I’ve worked on business tools, APIs, delivery logistics, and legacy modernization. At myHomeIQ, I developed a real estate data aggregator that unified listings from multiple sources.

Experience

Work history, roles, and key accomplishments

Software Engineer

E-commerce Platform (Retail & Marketplace)

Jan 2024 - Oct 2026 (2 years 9 months)

Managed full SDLC from concept to deployment and analytics. Developed Merchant Center and designed Order Discounts Engine, integrated WMS/TMS via Kafka and Zendesk via REST, optimized SQL queries, and scaled services for high-volume data processing.

Ruby on Rails PostgreSQL Elasticsearch Redis Sidekiq RSpec Swagger Kafka Kubernetes GitHub Actions ArgoCD Vault Datadog Sentry

Software Engineer

Shopify Core Team (EPAM)

Dec 2022 - Jan 2024 (1 year 1 month)

Developed and maintained Shopify business tools, supported and migrated old tools from Rails to React.

Ruby on Rails React Remix NodeJS TypeScript Tailwind CVA GitHub Actions

Software Engineer

Marathon Health (EPAM)

Feb 2022 - Dec 2022 (10 months)

Improved test coverage from 45% to 90%, migrated Rails from 4 to 7, designed and deployed a new mobile API, and refactored legacy SQL queries for performance.

Ruby on Rails PostgreSQL Sidekiq Redis Capistrano RSpec SimpleCov AWS CircleCi

Software Engineer

Rocket Delivery (Raketa app)

Feb 2021 - Feb 2022 (1 year)

Managed full SDLC, implemented country-specific business requirements, built a zoning engine with PostGIS, and developed tools for legal process automation.

Ruby on Rails PostgreSQL PostGIS Elasticsearch Redis Sidekiq RSpec API Documentation Kafka Kubernetes GitHub Actions ArgoCD

Software Engineer

myHomeIQ (ex SOALabs (ex Loomlogic))

Dec 2016 - Jan 2021 (4 years 1 month)

Migrated legacy fullstack app to backend for web and mobile, designed Validation Engine, architected scalable SQL queries, and developed a real estate data aggregator with multiple integrations.

Ruby on Rails PostgreSQL Sidekiq RSpec Redis Swagger CircleCi

Middle Ruby on Rails Developer

Digital Crafters

Jun 2013 - Nov 2016 (3 years 5 months)

Developed and maintained outsourced projects, set up VPS and deployment, handled data migrations, collaborated with clients, updated dependencies, and mentored trainees.

Ruby on Rails PostgreSQL MySQL jQuery CoffeeScript Slim SASS Sidekiq Capistrano

Education

Degrees, certifications, and relevant coursework

Faculty of Pedagogy, Psychology and Vocational Education

Master's Degree in Education, Education

2022 - 2024

Master's Degree in Education with a focus on Computer Science Teaching, completed in 2024.

Vinnytsia National Technical University

Master’s Degree in Engineering, Engineering

2005 - 2010

Master’s Degree in Engineering from Vinnytsia National Technical University, Institute of Automation, Electronics and Computer Control Systems, 2005–2010.