03/21/2026 updated

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Full-Stack Product Developer - Web, Telegram, CRM & AI Automation

Belarus, Belarus
Worldwide
Belarus, Belarus
Worldwide

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freelancermap_resume_vadzim_antanovich_en.pdf

About me

Business-focused full-stack developer delivering digital products with measurable outcomes: lead-generation Websites, bots, CRM systems, and Mini Apps. Main stack includes Projects are delivered in short milestones with diagnostics, a mini-spec, MVP scope, QA/release, and post-launch iteration.

HTMLJavaScriptUser Experience (UX)Artificial IntelligenceData AnalysisAutomationBusiness To BusinessCustomer Relationship ManagementCascading Style Sheets (CSS)Conversion Rate OptimizationDevOpsWeb DevelopmentE-CommerceSalesPython (Programming Language)PostgreSQLMySQLNGINXNode.jsPrism (Software)RedisNext.jsSmoke TestingTypeScriptWorkflowsCataloguesMetricsLarge Language ModelsBackendFastAPIFront End Software DevelopmentSales AutomationDocker
Full-Stack Web Development
Frontend development with Next.js, TypeScript, JavaScript, HTML, CSS and backend development with Python, FastAPI, Node.js, PostgreSQL, Prisma, Redis, MySQL

AI Sales Automation
AI sales copilots with human-in-the-loop flows, lead qualification, dialogue summaries and LLM API integration

Telegram Bot Development
Telegram bots for lead intake, booking, reminders, statuses, notifications and Telegram Mini Apps with messenger-native UX, Telegram auth, API integration, analytics

CRM Systems
Mini CRM and internal systems with pipeline, tasks, roles, SLA, reporting and CRM/webhook integrations

E-commerce Development
E-commerce store development with order conversion optimization, abandoned cart reduction, average order value improvement

DevOps and Deployment
Docker, Nginx, production smoke testing, release workflows and production deployment workflows

Corporate Website Development
Lead-generation websites, corporate websites, B2B RFQ catalogs with clear scope definition, demo-based delivery

Analytics and Optimization
Bitrix, analytics events, form routing, lead qualification flows and metrics-based improvements


Project history

AI Sales Copilot Developer

B2B sales team
AI sales assistant for SaaS sales team handling high volume of inbound leads with different purchase readiness levels. Improved first response time by 38%, demo conversion by 16%, reduced script deviations by 31%

Mini CRM Developer

Digital agency
Mini CRM and internal system for agency managing leads in spreadsheets and chats. Reduced lost leads by 35%, improved SLA compliance by 27%, increased stage velocity by 21%

Telegram Booking Bot Developer

Beauty salon chain
Telegram booking bot for 6-location salon chain handling bookings manually in chats. Reduced no-show by 24%, booking time by 43%, achieved 74% auto-bookings share

E-commerce Store Developer

Designer table manufacturer
E-commerce store for designer table manufacturer needing direct e-commerce channel. Improved order conversion by 27%, reduced abandoned carts by 22%, increased average order value by 14%

Corporate Website Developer

Export-oriented company
Export-focused corporate website for company entering new markets. Increased inbound B2B inquiries by 26%, time on site by 31%, qualified lead share by 18%

Corporate Website and Lead Funnel Developer

Digital consulting brand
Corporate website and lead funnel for digital consulting brand needing expertise showcase, case studies, and inbound demand capture. Improved content update speed by 4x, reduced lead handling time by 36%, achieved 100% scalability readiness

Portfolio


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