$1,000
/ project
- Responsive website (3–5 pages)
- Built with React/Next.js
- Basic CMS / contact form
- Deployed to Vercel/AWS
- Delivery: ~1–2 weeks
YASIR
Md Billal Yasir
Turning Ideas Into Code
Hi, I'm Billal Yasir, a Full Stack Developer & AI Integration Specialist Based in Europe.
My Services
Turn Information Into Actionable Insights
Full-Stack Development
Design and build production-ready applications with Next.js, React, Node.js, Express, and MongoDB. Clean architecture, REST APIs, secure auth (JWT), payments (Stripe), and dashboards that scale.
AI Chatbots & Semantic Search
Ship AI assistants powered by OpenAI, LangChain.js, and Pinecone. Train on your data, embed on your site, and enable context-aware support, lead capture, and knowledge base Q&A.
Real-Time & Scalable Systems
Build realtime features with Socket.IO and notifications, optimize throughput with Redis and indexing, and deploy to AWS (S3/EC2). Resilient backends ready for high traffic.
SEO & Performance Optimization
Improve ranking and UX with SSR/ISR, caching, code-splitting, and Core Web Vitals tuning. Proven results boosting organic traffic and speeding up page loads.
My Skills
Technologies & Tools
JavaScript
React.js
Next.js (SSR/ISR)
Redux
Tailwind CSS
Node.js
Express.js
MongoDB
Socket.IO (Realtime)
Stripe API
Python (Learner)
OpenAI API
LangChain.js
Pinecone (Vector DB)
Git & GitHub
AWS S3 / EC2
Redis
Performance Optimization
Caching & Indexing
Security Best Practices
JWT / Validation / Rate Limiting
Professional Journey
Work Experience
Full Stack & AI Integration Specialist
- Hired as the primary Full Stack Engineer to design and build a new SaaS platform from the ground up.
- Developed a SaaS that converts product CSVs into SEO copy and image mappings — cutting catalog launch time from days to hours.
- Expanded platform modules: SEO Generator, Image Finder, CSV Validator, templating engine, and multilingual support (EN/EL, DE planned).
- Integrated AI-driven workflows (OpenAI + LangChain + Pinecone) to generate optimized product content from structured inputs.
- Built a reliable, scalable backend with Next.js App Router, Node.js/Express, Redis caching, and MongoDB indexing.
- Enabled realtime job tracking & collaboration with Socket.IO and zero-downtime deployments with versioned APIs.
- Ensured GDPR compliance with browser-only processing, consent gating, rate limiting, data minimization, and deletion flows.
SaaSNext.jsReactNode.jsExpressMongoDBOpenAITailwindCSSWallee PaymentGDPR
Full Stack Web Developer
- Delivered the Licious.ai chatbot platform with onboarding, file/KB training, embeddable widget, subscriptions, and admin tools.
- Wrote Node.js automation scripts for ETL imports/exports, migrations, cron jobs, and SEO pipelines.
- Boosted organic traffic ~40% through SSR, optimized metadata, and Core Web Vitals improvements.
- Scaled backend for 100k+ users with MongoDB optimizations, cursor pagination, and job queues.
- Strengthened reliability with JWT auth, sanitization, rate limiting, structured logs, and CI/CD pipelines (GitHub Actions).
JavaScriptNext.jsReduxNode.jsExpressMongoDBTailwind CSSOpenAILangChain.jsPineconeAWS S3CI/CDAutomation Scripts
My Portfolio
Look at my work &
give me your feedback
Web Application
AI SEO Generator (For Powersoft365)
Upload a CSV, choose what to generate, and export clean results. Built for ops teams and merchants who need scale without the hassle.
JavaScriptNextJsReduxTailwindCSSNodeJsExpressJsMongoDBOpenAIRestAPIWallee Payment
Web Application
Licious.ai – SaaS AI Chatbot Platform
AI chatbot platform where users sign up, subscribe, connect their domain, and train chatbots via file uploads or a knowledge base. Embeddable chat agent for intelligent, automated customer support.
JavaScriptNext.jsReduxNode.jsExpress.jsMongoDBTailwind CSSOpenAI APIPineconeLangchain.jsAWS S3JWTSSR
Web Application
Abroax – Made Easy Global Admission
Global admissions platform for international students & institutions. Real-time chat, live application tracking, advanced university search. Built from scratch for 2025.
JavaScriptNext.jsReduxNode.jsExpressJsMongoDBAWS S3StripeTailwind CSSFCMSocket.IOREST APIFirebase
Web Application
Appointment Booking Application
People can book an appointment by paying the rate applicable for the selected date.
JavaScriptNext.jsReduxNode.jsExpressJsMongoDBTailwindCSSStripeREST API
Testimonials
Inspiring Feedback from Clients
Yasir was instrumental in the success of our ventures at HomeSelling.ai. He not only architected and built Licious.ai—our flagship AI chatbot SaaS platform—from the ground up, but also supported our core HomeSelling.ai product with critical automation scripts and bug fixes that kept the business running smoothly. His ability to take full ownership of complex projects, from frontend React/Next.js to backend Node.js APIs and AI integrations, consistently impressed us. Yasir works with precision, speed, and an attention to detail that is rare. He's not just a developer, but a true problem-solver who always goes above and beyond. Any team would be lucky to have him.
Kosol Sek
Founder Of Homeselling.ai & Licious.aiReflecting on my overall experience, I can confidently say that working with Yasir has been a game-changer. A really great experience, he is serious, all my expectations have been fulfilled. Ultra fast response time, and real accompaniment. Without a shadow of a doubt, I wholeheartedly recommend Yasir to anyone seeking a freelancer who not only delivers outstanding results but does so with a level of professionalism that is truly commendable. Yasir's commitment to excellence and ultra-fast response time make him an invaluable asset for any project. Yasir is the one to choose. I am grateful for the positive experience and look forward to future collaborations with him.
Sawellan
Audio EngineerBest Pricing
Project-Based Pricing Plan
Starter
Growth
$3,000
/ project
- Full-stack web app / SaaS MVP
- User authentication, dashboards, APIs
- Stripe payment integration
- Realtime chat / notifications
- Delivery: ~4–6 weeks
Enterprise
$7,000+
/ project
- Multi-tenant SaaS platforms
- AI integration (OpenAI, LangChain, DB)
- Performance tuning (Redis, indexing)
- DevOps (AWS, CI/CD pipelines)
- Delivery: ~2–3 months
Get In Touch
Let's make your brand brilliant!
If you would like to work with me or just want to get in touch, I'd love to hear from you!