Frontend Engineer & AI Developer
I build web applications with React, Next.js, and TypeScript. I also integrate AI features like chatbots, LLM APIs, and automation workflows into production systems.
About Me
Frontend Engineer | AI Developer
I'm a Frontend Engineer and AI Developer with 4 years of coding experience, including 1+ year in production environments. I build web applications with React, Next.js, and TypeScript, and integrate AI capabilities like LLM APIs, chatbots, and n8n automation workflows that reduced manual operations by 40%.
My work spans production CRMs with AI voice assistants, headless ecommerce platforms (Bagisto, MedusaJS), internal knowledge base systems with RAG and vector search, and ERP web interfaces. Outside of work, I've experimented with running LLMs locally, built Android games, and created multiple web apps as side projects.
I combine technical execution with product thinking - understanding business requirements, making architecture decisions, and delivering scalablesolutions across the full stack with cloud experience in Supabase and AWS.
Frontend Engineer at Happierleads
Developed and maintained Happierleads V2 and V3 using Next.js, React, TypeScript, and Redux, delivering production-grade applications that serve real customers. Built reusable UI components with Material UI, Ant Design, and SCSS to ensure consistent design systems and accelerate feature development. Improved frontend performance through strategic state refactoring and lazy loading techniques, resulting in faster load times and enhanced user experience. Collaborated closely with backend engineers and designers to refine UX flows and ensure seamless integration across the product. Integrated REST APIs across core product features, enabling robust data flow and real-time functionality throughout the application.
Full Stack Developer
Designed and developed VenlynOS, a production-ready Progressive Web App (PWA) CRM platform specifically built for U.S. service-based businesses. Architected and implemented a scalable, type-safe frontend using Next.js, React, and TypeScript, ensuring maintainable code and optimal performance. Built responsive, mobile-first interfaces with Tailwind CSS that deliver seamless user experiences across all devices. Integrated Supabase for real-time database operations and authentication, enabling robust data synchronization and secure user management. Implemented advanced AI-powered voice assistant features using Vapi, transforming customer interactions through intelligent automation. Delivered a full-stack solution that combines modern web technologies with practical business value, demonstrating expertise in both frontend architecture and backend integration.
B.Sc Business & IT
IU International University of Applied Sciences. Comprehensive curriculum covering software engineering, cloud computing (AWS), database systems, business strategy, IT law, and data regulations. Completed Bachelor Thesis: "A Lightweight CRM Application for Urban Bars," demonstrating full-stack development capabilities and practical application of business and technical knowledge. Applied theoretical concepts to real-world projects throughout the degree, building a strong foundation in both technical execution and business acumen.
Microsoft Certifications
- Programming with HTML, CSS and JavaScript
- Programming in C#
- AZ-204 Developing Solutions for Microsoft Azure
- Developing ASP.NET MVC Web Applications
Capabilities & Craft
Scalable frontend systems built for real-world products
I design and implement frontend architectures that scale beyond a single page or feature. My focus is on maintainable component systems, predictable state management, and clean separation of concerns so products remain easy to evolve over time.
Focus Areas
- Reusable component libraries and design systems
- Modular architecture for complex UIs
- Clear state boundaries and data flow
Tools
Related Projects
VenlynOS - AI-Powered CRM
Production PWA for US service businesses with AI voice assistant for automated bookings and client management. Live deployment serving real customers.
Urban Bar CRM
Production CRM system for urban bars with customer management, bookings, and analytics. Live deployment with real business data.
These capabilities come together in the projects below, where design, engineering, and performance meet real-world constraints.
Some of My Work
Production systems, AI automation, and frontend craft - projects that solve real problems
Live Projects
Production systems serving real users, traffic, and measurable business outcomes.
Production PWA for US service businesses with AI voice assistant for automated bookings and client management. Click to get credentials.
Professional security services website for Kota Tim Sekjuriti. Modern, trustworthy design showcasing security solutions and services.
Modern cryptocurrency token platform website for BeefingBot. Showcasing tokenomics, roadmap, and community features with engaging design.
Web Applications
Full-stack applications and platforms engineered for reliability, security, and scale.
Production SaaS platform for creating AI-powered learning companions through voice conversations. Live deployment with user management.
CRM and business management platform specifically designed for physiotherapy practices. Manage clients, appointments, and business operations.
AI, Automation & Intelligent Systems
LLM assistants, voice agents, and workflow automation connected to live data and APIs.
AI-Powered Conversational Assistant
n8n · Claude AI · OpenRouter · WooCommerce API · JavaScript
Production chatbot deployed on Facebook Messenger for an e-commerce business. Handles customer inquiries in three languages, detects intent using LLMs, searches a live WooCommerce catalog, and returns product recommendations - replacing 40% of manual support work.
AI Voice Assistant for Lead Intake
Vapi AI · Next.js 15 · Supabase · Google Maps API · TypeScript
Voice AI system integrated into VenlynOS CRM. Answers incoming phone calls, collects service requirements through natural conversation, validates caller location against configurable service radius using Google Maps, and creates CRM records with booked appointments - zero missed calls.
NextSolution ERP – Web Interface
Next.js · TypeScript · React · REST APIs · Tailwind CSS
Built the web-based companion interface for NextSolution, a desktop ERP system traditionally installed from CD on business workstations. The web interface brings core ERP modules - inventory, invoicing, and reporting - to the browser, enabling remote access without replacing the existing desktop deployment.
Internal Knowledge Base System
Next.js · TypeScript · PostgreSQL · pgvector · OpenAI API
AI-powered knowledge management system for organizing and searching internal documentation. Uses vector embeddings for semantic search, automated document ingestion, and context-aware Q&A so teams find answers without digging through folders.
Landing Pages
Marketing landing pages focused on conversion, performance, and brand clarity.
Ecommerce Platform Development
Building scalable commerce with open-source frameworks
Bagisto
Laravel · PHP · GraphQL · MySQL
Extended Bagisto with 25+ configurable storefront templates, GraphQL-powered rendering, and UnoPIM integration for scalable product management. Contributed conversion-oriented features including enhanced PDPs with size charts and variant logic.
MedusaJS
Node.js · TypeScript · Next.js · PostgreSQL
Built headless commerce storefronts with MedusaJS V2. Custom plugins for low-stock alerts, Strapi CMS integration for dynamic content, and Stripe-powered checkout flows. Monorepo architecture with admin panel and storefront.
Latest from My Case Studies
Case studies and insights on how my software and design solutions helped solve real-world problems
Get In Touch
Have a project in mind? Feel free to reach out. I'm always open to discuss new opportunities and collaborations.
Contact Information
For agency / retainer offerings, see: https://stoimera.com.