Mantas Karmaza

Available for work

€100M+ added via 4,000+ A/B tests for 360Cycles, Draco and over 200 other DTC brands

Based out of LithuaniaReview this user

Shopify DevelopmentUX / UI DesignBusiness Process Automation

12 services

Newest first

10% more conversions in 60 days, same traffic, or your money back

Let me make you an offer. Give me 60 days. I'll raise your website's conversion rate by at least 10%. Same traffic. Not one extra dollar on ads. If I don't, you get your money back. Same visitors, more buyers. More revenue without touching your ad budget. Why can I say that? Because I don't guess. • 1 in 3 of our test hypotheses win. Industry average: 1 in 5. • 20-40% average revenue growth after a single optimization round. • 1,000+ A/B tests a year. 70+ insights per audit. • 98% client satisfaction. 200+ companies helped. What happens in the 60 days: • Audit of your funnel, analytics and user behavior • Hypotheses ranked by revenue impact • UI/UX design and development of the changes • A/B testing, so every gain is measured, not claimed Who this is for: stores and lead-gen sites with real traffic that already sell but leave money on the table. If your site barely gets visitors, this isn't for you yet. Fix traffic first. The guarantee has conditions (minimum traffic, conversion volume and order size). We confirm you qualify on the first call, before you pay anything. Tired of leaving money on the table? Send me your site.

2 days ago

Posted byMantas KarmazaMarketing & Growth

Market ResearchConversion Rate OptimizationLanding Page OptimizationAnalyticsCopywriting

Website care so your site never breaks the day your sales spike

Websites don't break on quiet days. They break on launch day. During the sale. Right after the ad money is spent. An outdated plugin. A failed update. An expired certificate. A hack. Any one of them can take your site, and your revenue, offline. I keep your website running so you never have to think about it. What you get: • Regular updates for WordPress core, plugins and themes • Backups and security monitoring • Uptime and performance checks • Small content edits and fixes on request • A real person to message when something looks off Essentials plan: $40 + VAT per month (or $420 + VAT per year). Bigger plans available for stores and complex sites. Why me: 5+ years, 200+ US & EU brands, 4.9 rating. WordPress, WooCommerce and Shopify are our daily work. Hand it off. Get back to running your business.

2 days ago

Posted byMantas KarmazaWeb & App Development

IT SupportPerformance OptimizationFront-End DevelopmentSystems AdministrationDebuggingApplication Security

SEO that brings buyers ready to pay, not just pretty traffic graphs

Traffic is a vanity metric. Buyers pay the bills. Most SEO agencies send you reports full of rising graphs while your sales stay flat. Rankings for keywords nobody buys from. Blog posts nobody reads. I do SEO the other way around: start with the searches that make you money, then win them. What you get: • Technical SEO audit and fixes: speed, structure, indexing, Core Web Vitals • Keyword research focused on buying intent • On-page optimization for your key product and service pages • AI SEO and GEO, so you show up in AI search and assistant answers too • SEO + CRO framework, so new traffic actually converts • Reporting tied to leads and sales, not just rankings Built for WordPress, WooCommerce and Shopify sites. Why me: 5+ years, 200+ US & EU brands, 4.9 rating. Monthly SEO from $800 + VAT. One-time technical SEO audits from $1,500 + VAT. Send me your site and your top competitor. I'll tell you why they're outranking you.

2 days ago

Posted byMantas KarmazaMarketing & Growth

Market ResearchConversion Rate OptimizationContent MarketingAnalyticsCopywriting

Find out exactly why visitors leave without buying, and fix it

More traffic won't save a website that doesn't convert. It just makes the leak more expensive. Before you spend another dollar on ads, find out where visitors drop off and why. That's what a UX & CRO audit does. Essential audit (from $700 + VAT): • 30+ prioritized UX and CRO recommendations • Analysis of up to 5 key pages • UX audit of up to 2 competitors • Findings documented in Figma • Kickoff and results presentation calls Full audit (from $1,100 + VAT): • Everything above, plus 70+ recommendations • All key user journeys analyzed and backed by data • Shows how each fix should look Then, if you want, we implement the fixes and test them. Why me: 4,000+ A/B tests run. 400+ visual CRO audits delivered in 2026. Results like +23% conversions for Draco Slides and +42% for MeriWoolArt. Duration: 2 to 3 weeks. Send me your site. I'll tell you if you need an audit, or just one fix.

2 days ago

Posted byMantas KarmazaMarketing & Growth

Market ResearchConversion Rate OptimizationLanding Page OptimizationAnalyticsCopywriting

Up to 500% faster website in 5 business days, or your money back

Your website is slow. You know it. Your customers know it. Google knows it. And every extra second of load time quietly bleeds sales. Visitors don't wait. They hit "back" and buy from someone faster. Here's the offer: Up to 500% faster website. In 5 business days. If we don't hit the results we agree on, you get your money back. What you get: • Full speed audit: what's slowing you down and why • Image, code, script and database optimization • Caching, CDN and server configuration (Cloudflare and more) • Core Web Vitals improvements for better Google rankings • Before and after report with real measurements Works on WordPress, WooCommerce, Shopify and custom sites. Real example: Draco Slides. Mobile PageSpeed went from 53 to 91 (+265% mobile speed), and conversions rose 23%. Why me: 5+ years, 200+ US & EU brands, 4.9 rating. Send me your URL. I'll show you how fast it could be, and what that's worth to you.

2 days ago

Posted byMantas KarmazaWeb & App Development

Back-End DevelopmentPerformance OptimizationFront-End DevelopmentE-Commerce DevelopmentDebugging

Email automation that adds 20%+ revenue from customers you already have

You spent good money getting those customers. Then you let them walk away after one order. That's the most expensive mistake in e-commerce. Abandoned carts. One-time buyers. Subscribers who never hear from you again. Every one of them is revenue you already paid for and never collected. I set up email automations that collect it, on autopilot. What you get: • Abandoned cart and browse abandonment sequences • Welcome series that turns new subscribers into first-time buyers • Post-purchase and win-back flows that drive repeat orders • Segmentation based on what people actually buy • Connected to your Shopify, WooCommerce or WordPress site (Mailchimp and more) The goal: 20% or more added revenue from email. And if we don't achieve greater engagement and sales, you get your money back. Proof: for 360 Degrees Cycles we connected their POS and online store to Omnisend. Result: 70% average open rates and 15-30% click-through rates. Why me: 5+ years, 200+ US & EU brands, 4.9 rating. Book a free strategy call. I'll show you exactly where your store is leaking repeat revenue.

2 days ago

Posted byMantas KarmazaMarketing & Growth

Conversion Rate OptimizationEmail MarketingAnalyticsMarketing AutomationLifecycle MarketingCopywriting

Automate the busywork so your team stops doing robot work

Count the hours your team spends this week copying data, sending the same emails, creating invoices and chasing updates. Now multiply by 52. That's what manual work costs you. And it's not just the hours. It's the errors, the delays, and the good people who quit because their job turned into data entry. I automate the repetitive parts of your business so your team can do the work that actually grows it. What I automate: • Invoicing and accounting data transfers • Lead capture, CRM updates and follow-ups • Order processing, supplier product uploads and stock sync • Reports and dashboards that build themselves • Cold sales sequences and customer success tracking Tools: Airtable, APIs, webhooks, custom scripts and AI (OpenAI, Claude), connected to what you already use. Proof: for BBQ4You we connected Sage and WooCommerce with Make. Orders, customers, stock and VAT now sync automatically, with no manual entry. Why me: 5+ years, 200+ US & EU brands, 4.9 rating. Free consultation first. I'll map your processes and show you which automations pay back fastest, before you spend a cent. Tell me the task your team hates most. Let's start there.

2 days ago

Posted byMantas KarmazaAI & Automation

API IntegrationWebhooksWorkflow AutomationBusiness Process MappingAI Integration

AI built into your business so it does real work, not party tricks

Everyone is "using AI." Few are making money from it. Most businesses bolt on a chatbot, play with it for a week, and forget it exists. Meanwhile the real gains, hours saved and sales made, sit untouched. I build AI into the places where it actually pays: your website, your store and your internal workflows. What I build: • AI assistants that answer customers and qualify leads 24/7 • AI features inside your web app or e-store: search, recommendations, content • Internal AI tools that draft, summarize, classify and route work • OpenAI and Claude integrations connected to your own data • Browser extensions and custom AI apps Real example: a Laravel website and AI browser extension for an AI writing product. Why me: 5+ years building web products for 200+ US & EU brands. We ship working tools, not demos. From $35 + VAT per hour. Every project starts with a free consultation and a clear estimate. Tell me the most repetitive, expensive task in your business. That's usually where AI pays for itself first.

2 days ago

Posted byMantas KarmazaAI & Automation

API IntegrationRAG & Knowledge BasesWorkflow AutomationAI Agent DesignLLM Application DevelopmentAI IntegrationPrompt Engineering

Custom web apps that replace the spreadsheets running your business

Somewhere in your business there's a spreadsheet holding everything together. Or a tool you pay for that does 60% of what you need. Or an idea that won't leave you alone. That's where a custom web app comes in. I build web applications that fit the way your business actually works, instead of bending your business around someone else's software. What you get: • Discovery and scoping: we define what to build, and what not to • UX/UI design in Figma before a line of code is written • Development on proven stacks: Laravel, Node.js, React, MySQL, MongoDB • Integrations with your existing tools, APIs and AI (OpenAI, Claude) • Deployment on AWS, DigitalOcean or Cloudflare, plus ongoing support Recent example: a Laravel website plus an AI-powered browser extension for an AI writing product. Why me: 5+ years, 200+ US & EU brands, 4.9 rating. Projects start from $10,000 + VAT. You get a free estimate first, so there are no surprises. Tell me what's breaking (or what you're dreaming of). I'll tell you straight if it's worth building.

2 days ago

Posted byMantas KarmazaWeb & App Development

Back-End DevelopmentDatabase DesignFront-End DevelopmentTesting & QASystem ArchitectureFull-Stack DevelopmentAPI Design

WordPress sites that bring in clients, not just compliments

Your website gets compliments. Great. Does it get clients? Most business websites are digital brochures. They look nice, say nothing, and quietly send visitors to your competitors. I build WordPress sites with one job: turn visitors into enquiries, bookings and sales. What you get: • Custom WordPress site designed around how your buyers decide, not a template • Messaging structure that answers objections before they're asked • Fast, mobile-first build with SEO foundations in place • Easy admin, so you can edit content and add pages yourself • Forms, booking, CRM and email integrations connected No expensive platform subscriptions. You own it. Proof: Waterpik Lithuania got 22% more orders after we redesigned their WordPress store, with SEO rankings kept intact. Why me: 5+ years, 200+ US & EU brands, 4.9 rating. 70%+ of our work is WordPress, WooCommerce and Shopify. From $35 + VAT per hour, with a free fixed estimate before anything starts. Send me your current site. I'll tell you what's costing you the most clients.

2 days ago

Posted byMantas KarmazaDesign & Brand

Visual DesignUI DesignResponsive DesignInteraction DesignWeb DesignUX Design

WooCommerce stores you own outright. No monthly fees eating your margin

Every month you pay platforms, apps and plugins a little more. Every month your margin gets a little thinner. There's another way. WooCommerce gives you a store you actually own. No platform subscriptions. No limits on design or features. Full control. The catch? Most WooCommerce stores are slow, clunky and built by people who've never sold anything. That's the part I fix. What you get: • Custom WooCommerce store built around how your buyers decide • 25+ payment gateways: cards, bank transfer, installments, crypto • Shipping and parcel locker providers with automatic labels • Easy admin: edit content, run discounts and manage orders yourself • Integrations with accounting, email marketing and supplier feeds Proof: Waterpik Lithuania got 22% more orders after our CRO audit and store redesign. Why me: 70%+ of our projects are WooCommerce, WordPress and Shopify. 200+ US & EU brands served. 4.9 rating. Projects start from $2,400 + VAT, with a free estimate first, so you know the price before a cent moves. Tell me what you sell. I'll tell you how I'd sell more of it.

2 days ago

Posted byMantas KarmazaWeb & App Development

Back-End DevelopmentPerformance OptimizationFront-End DevelopmentE-Commerce DevelopmentAPI Design

Shopify stores built to turn your ad spend into sales, not bounces

Most Shopify stores don't have a traffic problem. They have a conversion problem. You pour money into ads. People land. Look around. Leave. And you blame the ads. It's usually the store. I build Shopify stores engineered on buyer psychology, so the visitors you already pay for actually buy. What you get: • Custom Shopify store designed to convert, not to win design awards • Payments, shipping and taxes connected in one system • Migration from your old platform with zero data loss • Integrations: email marketing, accounting, inventory, suppliers, parcel lockers • Support through launch until the first orders come in Proof: MeriWoolArt got +42% conversions. Draco Slides got +23% conversions after we sped up their Shopify store. Why me: 5+ years, 200+ US & EU brands, 4.9 rating. Sites we've built serve 1,500,000+ customers. Projects start from $2,400 + VAT. Every build begins with a free estimate, so you know exactly what you're paying for before a cent moves. Send me your current store (or your idea). I'll tell you straight whether I can make it profitable.

2 days ago

Posted byMantas KarmazaWeb & App Development

Performance OptimizationFront-End DevelopmentE-Commerce DevelopmentFull-Stack DevelopmentAPI Design

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12 services