Hire the Best Replit Developers

It usually starts the same way. Someone wakes up with a “million-dollar idea,” opens a notes app, types it out…feels like a genius for 10 minutes…then quietly abandons it because turning it into actual working software is a different universe entirely. That’s where I come in. Ideas are easy. Getting them to actually work without breaking, freezing, or becoming a “we’ll fix it later” situation…that’s the real challenge. I build software that actually works in the real world, not just demos that behave nicely for presentations and then fall apart when real users show up. 𝑾𝒉𝒆𝒕𝒉𝒆𝒓 𝒚𝒐𝒖’𝒓𝒆 𝒃𝒖𝒊𝒍𝒅𝒊𝒏𝒈 𝒚𝒐𝒖𝒓 𝒇𝒊𝒓𝒔𝒕 𝒑𝒓𝒐𝒅𝒖𝒄𝒕 𝒐𝒓 𝒇𝒊𝒙𝒊𝒏𝒈 𝒂𝒏 𝒆𝒙𝒊𝒔𝒕𝒊𝒏𝒈 𝒐𝒏𝒆, 𝑰 𝒄𝒂𝒏 𝒉𝒆𝒍𝒑 𝒘𝒊𝒕𝒉: ⚡ AI-powered web applications ⚡ Replit development (from idea → working product) ⚡ Full-stack web applications ⚡ MVP development that actually ships ⚡ AI integrations (OpenAI, Claude, Gemini) ⚡ API development & integrations that don’t randomly “ghost” each other ⚡ Authentication & user management systems ⚡ Database design (Supabase, PostgreSQL, Firebase) ⚡ SaaS applications ⚡ Bug fixing (a.k.a. digital detective work) ⚡ Workflow automation inside your application ⚡ Custom dashboards & admin panels If it involves code, logic, or something “this should be simple but isn’t”… there’s a very good chance I can fix it, build it, or rebuild it properly. I don’t start by writing code. Because code is easy to write badly…and expensive to fix later. First, I figure out what you’re actually trying to achieve, not just what you said in the brief, but what you *actually mean when you say it at 2AM out of frustration.* 𝑻𝒉𝒆𝒏 𝒘𝒆: • Define the real problem (not the assumed one) • Strip out unnecessary complexity (because most apps are over-engineered suffering) • Build the core system first (something that actually works) • Test it like real users will break it (because they will) • Refine and polish until it feels smooth, fast, and reliable Because software shouldn’t only work in screenshots, pitch decks, or “demo mode.” It should work when your users are tired, impatient, and clicking things they shouldn’t be clicking. A client I worked with recently came in with an AI SaaS idea and a prototype that was basically holding itself together with hope and good intentions. We rebuilt it properly using Replit, integrated AI APIs, set up authentication, connected the database, and turned it into a working MVP they could actually show to users without apologizing beforehand. Instead of months of confusion and “we’re still working on it,” they had something live in weeks and real users started giving real feedback immediately. Which is always where the real product starts. Send me a message and tell me what you’re working on. I’ll help you figure out the smartest way to build it, and if it makes sense, we’ll turn it into something real, usable, and actually useful. Let’s build something people use…not something you keep “almost finishing.” 👉 Click “Invite” or “Hire” to get started 🤔 Got a quick question? Just send me a message...I usually respond faster than most apps load their dashboards. Keyword: AI App Development, Web Development, Full-Stack Development, API Integration, JavaScript, Python, React, Artificial Intelligence, Web Application, TypeScript, OpenAI API, REST API, Mobile App Development, React Native, Next.js, PostgreSQL, Product Management, Graphic Design, Web Design, SaaS Development, WordPress, Fintech Integration, Stripe, Node.js, HTML5, FFmpeg, Supabase, Front-End Development, Back-End Development, Automation, Gmail API, Web Scraping, AI Bot, PHP, Lovable, Base44, Tailwind CSS, MVP Development, Web App Development, UI/UX Design, Dashboard Development, Client Portals, Marketplace Development, CRM Development, ERP Systems, GraphQL, Authentication, Database Design, Cloud Deployment, Make, n8n, Zapier, OpenAI Integration, Gemini Integration, AI Chatbots, Workflow Automation, Bug Fixing, Performance Optimization, Scalable Architecture, Product Strategy, Rapid Prototyping, Startup Launch Support, Cursor, Bolt, Vercel, Firebase, MySQL, AWS, Flutter, Expo, Bubble, Angular, Laravel, Shopify, Wix, WooCommerce, Elementor, Divi, CMS Development, WordPress Plugin Development, Ecommerce Setup, ChatGPT API Integration, UI/UX Prototyping, iOS Development, Android App Development, Website Migration, Website Integration, API Development, AI Agent Development, Chatbot Development, Firebase Auth, Real-Time Database, Landing Page Design, LLM Prompt Engineering, Claude, Supabase Auth, Low-Code Development, No-Code Development, Back-End Development, Front-End Development, Web Application Development, Native App Development, Figma, Database Integration, SQL, WebSockets, ExpressJS, MongoDB, SQLite, Django, FastAPI, SaaS MVP Development, Startup MVPs, App Store Deployment, Google Play Deployment, Payment Gateway Integration, Twilio API, WhatsApp API, Voice AI, Data Analysis, Machine Learning,

TLDR: Check reviews ! :) portfolio: bilalbelli.eu 👈 I’m an experienced Software Engineer (with diploma) and Developer (not a vibe coder ! i understand and i can do everything) specializing in Python, Java, Javascript, Typescript, and modern Web technologies (Angular, Spring Boot, Node.js, Flask, Wordpress, Bootstrap, Next.js, Nuxt.js, Electron.js), and I also provide tutoring and mentoring in programming and computer science topics. I hold a strong Computer Science and Systems Engineering background, with solid experience in software development, backend & frontend engineering, system design, machine learning (AI, ML, DL, Agents) and applied problem-solving. I enjoy tackling non-standard and real-world problems, covering application design, algorithmic thinking, system architecture, and production-ready implementations, from initial analysis to clean, documented, and maintainable code. I regularly work on full-stack engineering problems, including: - Coding, - Documentation, - Manual Creation, - Scientific & Technical Writing, - Tutoring, I have hands-on experience with a wide range of technologies and tools, including Python, Java, C, JavaScript, TypeScript, HTML, CSS, SQL, and frameworks such as Spring Boot, Node.js, Flask, Electron, and Angular. I also work with relational databases (PostgreSQL, MySQL, SQL Server), and modern DevOps & infrastructure tools like Git, Docker, Jenkins, Ansible, Jira, as well as Linux environments and networking solutions (Nginx, HAProxy, DNS, virtualization). I’m comfortable learning and adapting to new technologies quickly, and my broad technical foundation allows me to switch tools and frameworks efficiently to best fit project requirements. Why hiring me ? because i provide a high quality job and get the job done real quick !

Written by an actual human. Ironic, since building with AI is my whole job, but every word here is mine, and so is every message you'll get. If a reply ever reads like ChatGPT wrote it, fire me. Most people who find me are holding an app that looks finished and isn't. Built in Lovable or Bolt over a weekend, demoed well, and now it's supposed to take real money from real users, and nobody knows whether it will hold. Or a contractor went quiet in week three and took the repo knowledge with them. That's the job. I read code I didn't write, work out what's solid and what only appeared to work, and get it to production properly. WHAT USUALLY TURNS UP API keys in the client bundle. Auth where any logged-in user can read another tenant's data. Stripe webhooks with no idempotency, so a retry double-charges. RLS policies that read correctly and don't actually isolate anything. No tested backup. Demo screens propped up by an empty backend. None of it shows up in a demo. All of it shows up in production. START WITH AN AUDIT. $400, 2 days. You give me repo access. You get a written report: every finding with file and line reference, severity, reproduction steps, and what it costs to fix. Auth and tenant isolation, exposed secrets, payment flow integrity, RLS correctness, behaviour under load. The report is yours whether or not you hire me for the fixes. You can hand it to any developer. Already have a developer and want a second opinion before launch? I do the review-and-verify side on its own. The person doing the work shouldn't be the person saying it passed. THEN, IF YOU WANT IT FIXED I keep what works, rebuild what doesn't, and hand the system back properly. Repo in your GitHub org, secrets rotated, staging and production separated, deploys you can roll back, and documentation good enough that the next developer doesn't need me. RECENT WORK Trimi. Lovable to Claude Code migration in two hours. Organic traffic 250k to 500k monthly after the migration and SEO push. Founders now ship updates without me. That was the point. Milpath. AI SaaS built with Claude Code and Codex, $5k MRR in 90 days. claudemarket.ai. My own AI directory, 60,000+ monthly visitors from technical SEO. Helpie AI. 1,000+ monthly active users. O-ts. 2x conversion rate after rebuild. ALSO MVP builds from scratch, idea to live product taking payments. AI apps and agents: Claude API, OpenAI API, RAG, chatbots. Migrations off Lovable, Bolt.new, Replit, Base44 and v0. Supabase auth, RLS, edge functions, Postgres schema design. Stripe checkout, webhooks, subscriptions. Claude Code and CLAUDE.md setup so your team can build AI-native without me. Blocked on a security review or an enterprise questionnaire? I do production hardening with a written control summary you can hand to whoever is asking. Stack: Lovable, Claude Code, OpenAI Codex, Base44, Replit, Bolt.new, Supabase, React, Next.js, TypeScript, Vercel, Stripe, n8n, OpenClaw. THE GUARANTEE Free scoping call before you spend anything. We map features, flows, milestones and price. Not a fit, you keep the plan. Working prototype in 3 weeks, real functionality on a live database, no mockups. Unlimited revisions within scope. WAYS TO WORK Audit, $400 fixed. Review and sign-off only, if you have a developer already. Fixed-price build or rescue, typically $2,500 to $15,000. Fractional developer, 10 to 30 hrs/week. Retainer from $650/month. You own the code either way. WHY THE SPEED IS REAL I was a software engineer at brainpool.ai, a London AI consultancy, building production LLM systems with LangChain, RAG pipelines and the Claude and OpenAI APIs before going freelance. That's the part that matters here. I can read the code, not just prompt it. When something breaks I debug it, rather than re-prompting until the error goes away and three new ones appear underneath. Claude Code, Lovable, Codex and Supabase are my daily tools, and after 50+ shipped projects I know where they fall over. Which generated auth patterns leak data, which edge functions time out under load, which screens are propped up by nothing. Knowing the failure points is what makes moving fast safe. WHAT CLIENTS SAY "Every technical finding, missing security headers, robots.txt, llms.txt, structured data, was specific, accurate and independently verified." SaaS founder, product audit. "Gets the job done without all the problems of working with the discount freelancers we all know about." Figma to Lovable build. Both from my verified reviews below. ABOUT ME I'm Zac. One developer in London, no account managers, no handoffs. I teach this stack to 3,000+ developers on YouTube and in a paid community. I keep the project load small, so if I'm at capacity I'll say so. No Shopify stores, and if you want pixel-perfect Figma work I'm the wrong hire Daily overlap with US Eastern. Hit Invite to Job and tell me what's broken. Fixed-price proposal within 24 hours

🥇 Top Rated | 100% Job Success | 5-Star Reviews | 20 Jobs 🏆 300+ Upwork hours with productive work and great client feedback 🟢 50+ mobile apps & 20+ websites live 🧑‍💻 13+ years of experience in full-stack mobile & AI development 🕒 Available in EST/PST-working hours. 🙋‍♂️Quick responses (<5 mins) unless I’m asleep, and excellent weekend support I will transform your Lovable or Replit web app into a high-performance native iOS & Android app that feels truly "App/Play Store ready"—not just a website in a wrapper. With a 100% Job Success Score and consistent 5-star feedback, I excel in delivering seamless web-to-mobile transitions that meet all requirements for a successful store launch. As a Capacitor, Ionic, Angular, and Flutter expert and Front-End Developer, I specialize in building high-quality hybrid mobile apps and websites tailored to specific business requirements. I also help in debugging, optimizing, and improving existing applications. I have strong expertise in converting websites into fully functional mobile applications. I have successfully transformed many Lovable AI websites into iOS and Android apps with smooth performance and native-like experience. With over 13+ years of experience in app and web development, I enjoy working with technologies like Capacitor, Ionic, Angular, Flutter, and Cordova/PhoneGap. As an active contributor to the Capacitor and Ionic ecosystem, I have contributed to multiple repositories, including capacitor-docs, capacitor-background-runner, ionic-framework, and capacitor-plugins. These contributions reflect my commitment to improving and strengthening the Ionic community. Let’s collaborate to turn your ideas into powerful and scalable software solutions. I’m confident I can help you achieve your development goals efficiently and professionally. Skills: ► Capacitor
► PhoneGap / Cordova
► Ionic
► Angular
► React
► Flutter
► Dart
► GetX
► Riverpod
► Hybrid App Development
► Electron
► Ionic Plugin Development
► Capacitor Plugin Development
► Custom PhoneGap/Cordova Plugin Development
► Firebase
► NGRX
► Object-Oriented JavaScript
► SQLite
► PHP
► HTML
► CSS
► REST APIs
► RevenueCat
► Publishing Android & iOS Apps IDEs I am familiar with: ► Visual Studio Code
► Android Studio
► Xcode

I am an AI App & Website Engineer with 13+ years of experience building full-stack applications, AI systems, and cloud-based platforms that are deployed in production environments. I specialize in turning ideas into scalable, revenue-ready software products using LLMs, agentic AI systems, and modern full-stack architecture. I don’t build prototypes-I build production systems that scale to real users and real business demand. ________________________________________ 🚀 What I build • 13+ years building full-stack web applications and AI systems • 5+ years working with AI/ML systems and production deployments • 100+ production features shipped across enterprise AI platforms • AI-powered SaaS applications (frontend + backend + cloud) • LLM applications (GPT, Claude, open-source models) • 10+ agent-based systems (automation, copilots, workflows) • RAG systems for enterprise search, knowledge bases, and data tools • Cloud-native deployments (scalable APIs, backend systems, CI/CD) ________________________________________ ⚡ Technical expertise • LLMs & AI: GPT-4/5, Claude, LangChain, LangGraph, RAG pipelines • Full Stack: React, Node.js, APIs, backend architecture • AI Agents: multi-agent systems, tool use, orchestration workflows • Data Systems: vector databases, embeddings, search systems • Cloud: scalable deployment, production-grade infrastructure ________________________________________ 📈 Real-world impact • Built AI systems improving operational efficiency in enterprise environments • Designed multi-agent RAG pipelines improving answer accuracy and reliability • Delivered AI automation tools reducing manual engineering and support workload • Built production systems handling large-scale usage and real-time workflows ________________________________________ 🎯 Best fit for clients who need: • AI SaaS products built from 0 → 1 • LLM-powered features added to existing platforms • Automation systems for business workflows • Scalable backend + AI architecture design • Production-ready MVPs that can grow into full products ________________________________________ 💡 Why clients choose me • 13+ years of real engineering experience (not tutorial-based AI work) • Strong focus on production systems, not demos • Deep understanding of both AI + full-stack engineering • End-to-end delivery: idea → architecture → deployment ________________________________________ If you're looking for a senior-level AI engineer who can design and build real production systems, I can help you turn your idea into a working product quickly and reliably.

If your Wix website looks outdated, feels like a template, or isn't converting — that's my specialty. ⭐ 5-Star Rated Wix Studio Expert Designer & SEO Strategist with 16+ years of experience helping businesses refresh, redesign, and grow their online presence. I don't just make sites look better — I restructure the user experience and optimize for search so your site drives real results: more demo requests, more leads, and more trust from the moment someone lands on your page. I also provide instructions on how to maintain the site, like media, text, and other things that you might need to maintain the website afterwards, upon request. Every review I've earned on Upwork reflects one thing: clients who came with a problem and left with a site they're proud to share. 🎨 Design & Development: → Visual redesigns and layout improvements in Wix & Wix Studio → UX cleanup: spacing, typography, visual hierarchy, mobile responsiveness → SaaS, service, health coaching, and e-commerce brand websites → Conversion-focused design (CTAs, flow, messaging clarity) → Figma-to-Wix transfers with pixel-level accuracy → Email capture, landing pages, and coming-soon builds → Ongoing site maintenance, blog publishing, and content updates 🔍 SEO Services: → Organic Content Performance Analysis — keyword rankings, top 10 keywords, content strengths & gaps, target audience alignment → LLM SEO Phrases used as strategic blog categories → Technical SEO Audit — page structure, meta setup, URL slugs, focus keywords, speed optimization → On-page optimization & ADA accessibility compliance → Cookie banner setup & each-page SEO compliance templates → Competitor Analysis — including CPC and ad spend insights → Google & paid ad strategy — 3 targeted ad concepts per campaign (short headline, long headline, description) → Blog strategy — topic ideas, FAQ development (General, Pricing, Technical/Trust), and full blog post writing per category → Content optimization aligned with how AI search engines (LLMs) surface results 🏗️ Who I work best with: You already have a site live — but it doesn't reflect the quality of your business. Maybe it looks like everyone else's template. Maybe your bounce rate is high. Maybe you're invisible on Google. That's exactly where I come in. I also work with clients building from scratch who need a clean, modern, search-optimized Wix site — without the back-and-forth. Industries I've worked in: Healthcare & SaaS • Design-Build & Construction • Health & Wellness Coaching • E-Commerce • AI & Tech Enablement • All around the world 🌎 🔧 My process is simple: I review your current site or brief, identify what's holding it back visually and in search, then deliver a refreshed design and SEO strategy that feels intentional — not templated. I communicate clearly, hit deadlines, and don't disappear mid-project. ✅ What you can expect: → Clean, modern design that matches your brand → Mobile-first, fast-loading pages → Clear CTAs that guide visitors toward action → A full SEO foundation — technical, on-page, and content → A designer and strategist who asks the right questions upfront My clients leave happy. The reviews speak for themselves. ✦ Top Rated & ID Verified Let's make your site work as hard as you do. 🚀