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Work experience

Product & Growth Manager

from 03.2025 to 02.2026 (1 year)
Mamma Mia Covers, Дистанційно (Роздрібна торгівля)

• Growth & Margin Engineering: Managed a 600+ SKU portfolio with ~$1M/mo revenue (Amazon + Shopify). Achieved 3% net margin growth and generated an additional $6,000+ in monthly net profit per flagship item by auditing logistics and redesigning packaging.
• Systemic R&D: Built a 4-phase R&D department from scratch, replacing intuitive search with a data-driven validation process and Rufus-ready content optimization.
• High-Impact Launches: Scaled new products to $20,000+ monthly revenue within 90 days while effectively mitigating 2025 trade tariff impacts.
• Quality & Retention: Reduced return rates (RoR) by 4% through sentiment analysis and the implementation of standardized factory inspection protocols.

Amazon Product Manager & Developer

from 05.2023 to 11.2024 (1 year 7 months)
Diogenes, Київ (Маркетинг, реклама, PR)

For two years, I was engaged in product launch and maintenance. By launching, I mean researching and analyzing products/niches, finding a supplier, etc. I have experience with launching a completely unique product that isn't exist yet on Amazon, developing a complex product, which means finding product components and assembling them. I work with a designer to create, for example, packaging, and a SEO specialist to create content for the Amazon listing. I work with Amazon US, JP, UK, and Shopify. After launching the product, I analyze the sales rate, seasonality for further ordering new batches of goods

Education

V. N. Karazin Kharkiv National University

Computer Science, Cybersecurity, Харків
Higher, from 2019 to 2023 (4 years)

Additional education and certificates

IT School Hillel

4 месяца

Knowledge and skills

• Продаж на Amazon

Additional information

Serhii Kalynchuk
Product & Growth Manager | R&D Strategy & Margin Engineering Kyiv, Ukraine |
[open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section)

SUMMARY
Data-driven Product & Growth Manager with 3+ years of experience in high-ticket product
development and scaling. Expert in Value Engineering and Risk Mitigation, specializing in the
strategic optimization of large-scale portfolios (600+ SKUs) with ~$1M/mo revenue. Proven
track record of launching premium products to $20,000+ monthly revenue within 90 days.
Achieved a 3% net margin increase through systemized R&D and deep-dive analytics.

PROFESSIONAL EXPERIENCE

Mamma Mia Covers | Product & Growth Manager
March 2024 – February 2025
• Growth & Margin Engineering: Managed a 600+ SKU portfolio with ~$1M/mo revenue
(Amazon + Shopify). Achieved 3% net margin growth and generated an additional
$6,000+ in monthly net profit per flagship item by auditing logistics and redesigning
packaging.
• Systemic R&D: Built a 4-phase R&D department from scratch, replacing intuitive search
with a data-driven validation process and Rufus-ready content optimization.
• High-Impact Launches: Scaled new products to $20,000+ monthly revenue within 90
days while effectively mitigating 2025 trade tariff impacts.
• Quality & Retention: Reduced return rates (RoR) by 4% through sentiment analysis
and the implementation of standardized factory inspection protocols.

Diogenes Solutions | Amazon Product Manager
May 2023 – February 2024
• Complex Lifecycle Management: Led the end-to-end development of products for
Amazon (US, JP, UK) and Shopify, ensuring patent purity and supply chain resilience.
• Supplier Sourcing & QC: Managed overseas supplier relationships and QC processes,
focusing on high-durability materials and assembly precision.
• Brand Protection: Maintained premium positioning for high-ticket items in saturated
markets by leveraging technical Q&A and A+ content to justify price points through
superior quality.

Flowmar | Amazon Product Researcher
September 2022 – April 2023
• Identified high-potential niches and conducted competitive benchmarking using Helium
10 and Keepa.

CORE COMPETENCIES
• Growth Strategy: Blue Ocean Strategy, Product Differentiation, Rufus & AI Search
Optimization, Value Innovation.
• Analytics: Niche Scoring Models (Custom Python-based), Unit Economics,

Sentiment
Analysis, Margin Optimization.
• Operations: Packaging Optimization (Dim. Weight), Factory Audits (AQL Standards),
Logistics Auditing.
• Risk Management: Patent/IP Research, Regulatory Compliance (2025 Tariff
Management).
• Tools: Helium 10, Keepa, Jungle Scout, Seller Central, Python (Data Analysis),
Advanced Sheets.

EDUCATION
B.S. in Cybersecurity, V. N. Karazin Kharkiv National University