Oleg Grigor'yev.

SigmaLedger, Inc · Coupon24

Part-time contract · Swiss office · Remote

Lead UX and interaction design for Coupon24 across iOS, Android, web, and partner tools, from preparation for public launch through continued product evolution.

• Proposed a Multi-Coupon Card that automatically groups eligible coupons for checkout, balancing a 15-coupon technical limit with shopper control.
• Designed passwordless access and recovery, store discovery, a universal scanner, category-led offer browsing, and partner portal experiences.
• The platform serves 1.3M+ monthly active shoppers, according to its official partner website; this is audience scale, not a measure of individual design impact.

Indago Technologies · Indago

Part-time contract · Tampa, USA · Remote

First dedicated product designer for an AI-powered B2B/B2C intelligence platform. Owned UX strategy, architecture, interaction design, and implementation support.

• Proposed a phased transformation and project-centered workspaces to organize analysts' data, collections, reports, templates, teams, and tasks.
• Designed shipped onboarding improvements, Projects, contextual AI assistance, and a reusable design system; report creation was partially implemented.
• Across the improvement period, client-reported B2C trial-to-paid conversion rose from 5% to 35%, and first-month renewal from 20% to 60%. These were combined product and team outcomes.

RevStar Consulting

Part-time contract · Tampa, USA · Remote

Led product design and UX initiatives across SaaS and enterprise client engagements.

• Conducted discovery, UX audits, research, and usability testing to identify problems and refine critical workflows.
• Rebuilt UI libraries and shared interaction patterns; supported implementation through documentation, engineering collaboration, and interface reviews.

NordWhale

Full-time · Ukraine · Remote

Designed web and mobile products across healthcare, fintech, marketplaces, blockchain, and SaaS.

• Led product design for Medzoomer from an initial 80-page requirements document, shaping connected experiences for patients, pharmacies, couriers, and operations teams.
• Restructured data-intensive SaaS interfaces and designed consumer products from user flows and prototypes through detailed UI and implementation support.