Hi there! I'm an independent freelance developer with over 7 years of experience building high-quality web applications. I specialize in crafting robust, scalable, and maintainable solutions that meet real-world business needs. Clean code, thoughtful architecture, and long-term maintainability are my priorities in every project. I’m currently open to long-term collaboration opportunities where I can bring value as a dedicated, full-stack developer. 👨🏻‍💻 My Skill Set 🔧 Backend Development Languages & Frameworks: Node.js (Express, NestJS, MeteorJS), Python (Django, Flask, FastAPI), PHP (Laravel), Golang (Gin, Fiber, Echo) Databases: MongoDB, MySQL, PostgreSQL APIs: REST, GraphQL DevOps & Cloud: AWS, Ansible, Terraform, Bash scripting 🎨 Frontend Development Frameworks: React (Redux, Redux Saga, Redux Thunk, Zustand, ImmerJS, Redux Persist, Provider), Next.js, Gatsby.js, Vue.js UI & Styling: HTML5, CSS3 (Sass, Less, SCSS), TailwindCSS, Bootstrap, Material-UI Languages: JavaScript, jQuery Others: GraphQL 🛍️ eCommerce & CMS Shopify WordPress Magento (v1 & v2) Let’s build something great together. I’m passionate about working on meaningful products and establishing long-term partnerships.

🏆 Top Rated | 100% Job Success | 5 Star Reviews ⭐⭐⭐⭐⭐ Looking for a GoHighLevel expert, n8n automation developer, and full stack engineer who actually delivers? I'm Saad, a full stack developer and automation specialist with 10+ years of experience. I help agencies, SaaS founders, and growing businesses build systems that run without babysitting. Here's what I do best: GoHighLevel (GHL) CRM Automation ✅ Custom CRM setup, sub-account management, snapshot creation ✅ Sales funnel and pipeline automation ✅ GHL + Mailchimp, ManyChat, Twilio, and Stripe integrations ✅ API integrations and webhook connections ✅ White-label agency portal setup n8n Workflow Automation & AI Agents ✅ Self-hosted n8n deployment and custom workflow builds ✅ AI agent development using OpenAI, LangChain, and vector databases ✅ RAG pipeline setup for document intelligence ✅ Voice bot and conversational AI automation ✅ Zapier and Make replacement builds ✅ CRM sync, lead capture, and notification automations Full Stack Web Development (MERN & Golang) ✅ React.js frontends with NextJS, SSR, and Tailwind CSS ✅ NodeJS and Golang backend APIs and microservices ✅ REST and gRPC API development and integration ✅ MongoDB, PostgreSQL, Redis database architecture ✅ AWS, Google Cloud, Docker, and Kubernetes deployment ✅ SaaS application development from MVP to production I don't disappear mid-project. I flag issues early, communicate clearly, and ship clean code that your next developer can read. Send me a message, describe what you need and I'll tell you honestly if I'm the right fit.

💻 Java • Rust • Go • Python • Docker • Kubernetes • CI/CD-Pipelines 🚀 Software Developer with 5+ years of experience building reliable, efficient, and maintainable backend systems. I specialize in developing clean, production-ready applications — from REST APIs and data pipelines to event-driven microservices. 🛠️ Whether it’s developing a full system from scratch, extending existing platforms, or rewriting legacy code in modern stacks, I deliver high-quality software that’s easy to understand, test, and deploy. ⚙️ My work is grounded in real-world DevOps: CI/CD pipelines, containerized environments, cloud-native tooling, and Git-based workflows are second nature. I bridge the gap between development and operations to make your software run smoothly — from code to deployment. 🌍 Fluent in English, German, and Arabic, I collaborate easily across teams and cultures. If you need a backend engineer who codes with purpose, communicates clearly, and delivers with confidence — I’m ready when you are.

Expert Vetted Developer I build conversational AI systems that actually ship, scale, and hold up in production, not demos that break under real traffic. With over a decade in the industry including the last 3+ years focused on conversational AI, I have designed and deployed chatbots and voice assistants that handle millions of messages for startups and enterprise teams across the US, helping them cut support costs, automate lead capture, and run 24/7 customer interactions without adding headcount. What I bring to your project: - Conversational AI & LLM Engineering Production bots with Rasa, Dialogflow, and LangChain. RAG pipelines, intent and entity design, context handling, multi-turn flows, and LLM integrations (OpenAI, Anthropic, open-source models) wired into real business logic, not just a chat window. - Backend & APIs High-performance services in Python with FastAPI. Real-time messaging over WebSockets, Redis for caching, queues, and session state, plus Twilio for SMS, WhatsApp, and voice channels. - DevOps & Scale I ship and own the full pipeline: Docker, Kubernetes, CI/CD with GitHub Actions and Jenkins, deployed on AWS and GCP. Your bot stays fast, monitored, and online as usage grows. Why clients keep working with me: - Clear communication and predictable delivery. You always know status. - I think about cost, latency, and maintenance, not just "does it work today." - Clean, documented, handoff-ready code your team can build on. If you need a conversational AI product or a Python backend built right the first time, send me a message with what you are trying to achieve. I will tell you honestly how I would approach it and what it takes. Available for both fixed-scope projects and ongoing engagements. Skills Conversational AI, Chatbot Development, Python, FastAPI, LangChain, Rasa, Dialogflow, LLM, RAG, NLP, DevOps, Docker, Kubernetes, CI/CD, AWS, GCP, Twilio, WebSockets, Redis, API

I am a software engineer with experience in Full Stack Development, AI-Driver Chatbot Development, Web Scraping and Automation. I have a Bachelors in Computer Science, and more than four years of experience writing code. I can develop efficient systems for you that are scalable and robust. I can also write fast and efficient scripts for you that will be able to utilize ChatGPT API to perform any task. Here's what I specialise in: Custom programs that leverage the power of AI Web Development (Full Stack) Web Scraping Web Automation Data Science The tools I use: Python Golang OpenAI FastAPI/Django/Flask Javascript ReactJS/React Native BeautifulSoup/requests Selenium Scrapy SQL I will also help you with maintenance of the project, and also provide assistance in any way needed. My aim is to provide you with the best quality of results. Also I believe good communication is the key to a successful project. So if you have a project that fits my criteria, then send me a message and we can discuss.

I work with Web3 teams who already have systems running but need experienced hands to get them production-ready Most of my engagements start mid-project. A team has contracts deployed, validators running, or backend services in place, but things break as real usage gets closer. I step in to review what exists, identify technical risks, and improve stability so teams can ship with confidence My background is in high-performance systems and blockchain infrastructure. I have built low-latency trading systems and DeFi tooling in Rust, worked on Cosmos SDK app chains, and developed full stack Web3 applications from smart contracts through to frontend Before blockchain, I spent 8 years building backend and infrastructure systems across fintech, energy, and enterprise environments What I typically help with: - Smart contract development and review in Solidity and Rust - Rust-based backend services, DeFi tooling, and on-chain integrations - Cosmos SDK networks, validators, and IBC - Full stack Web3 applications using Go, TypeScript, Next.js, NestJS - Blockchain indexers, automation, and operational tooling - Production ops, deployment, monitoring, and observability Core stack: Rust, Go, Solidity, TypeScript, Python, Cosmos SDK, Ethereum tooling, Next.js, NestJS, Docker, Kubernetes, Prometheus, Grafana If you have a Web3 system that needs a careful technical review before pushing further, I am happy to discuss

Senior Backend developer, building Python and Go services for SaaS, healthcare, and AI infrastructure at a Top Rated Plus Upwork agency. 7+ years of senior Backend engineering across Go and Python. Currently Senior Backend Engineer at HTEC, building Go microservices for AT&T's AI chatbot service. Prior: Team Lead on a FHIR-compliant Backend telemedicine platform at Proactive Health Tech (10+ Go services, healthcare data architecture, Python data pipelines). Native English, Bosnian, Croatian. Through Interactivated Solutions, a Top Rated Plus Upwork agency: 38,916 hours, 310+ contracts, 100% Job Success, 200+ public reviews. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ⭐⭐⭐⭐⭐"We brought Mesha in as our Backend lead to take over a stalled microservices rebuild. He took the Go services off the previous team's hands, rewrote three of the worst-performing endpoints, and tightened the Python data pipeline that was choking under load. Calm, honest about what wouldn't work, fast on what would. The kind of Backend engineer who actually ships." - Marko T., CTO ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Most Backend engineers come up through one language and learn the next when forced to. I came up through Go and systems engineering, then layered Python for data pipelines, ML infrastructure, and the cases where Python's ecosystem is the right tool. Senior Backend work where the language choice serves the problem, not the resume. Native English on every standup, every Loom, every Backend code review. Recent Backend work spans enterprise and product builds. At HTEC, senior contributor on AT&T's AI chatbot service - Go Backend microservices, inference routing, and downstream system integration. Prior: Team Lead at Proactive Health Tech, 10+ Go services handling patient records, scheduling, video session orchestration, and HL7/FHIR integration, plus Python pipelines for analytics and reporting. Through Interactivated Solutions, 310+ shipped contracts across SaaS, healthcare, fintech, and AI infrastructure. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ WHAT I DO ▸ Backend services and microservices - Go (Gin, Fiber, Echo) or Python (FastAPI, Django), REST and gRPC, PostgreSQL data layer. ▸ Backend APIs at production scale - rate-limiting, idempotency, retries, structured logging, observability that survives a 3am incident. ▸ Backend rescues - inheriting a stalled Go or Python codebase, stabilizing services, getting the team back to shippable. ▸ Backend for AI infrastructure - inference routing, model serving, embedding pipelines, vector DB integration, Python data pipelines feeding production ML. ▸ Backend data engineering - Python ETL pipelines, Pandas / Polars, async workers, batch and stream processing, Go for high-throughput hot paths. ▸ Backend team leadership - I lead Backend teams of 3-5 engineers, code-review heavy, CI gates that catch the drift juniors miss. ▸ Backend performance work - query tuning, service profiling, infrastructure right-sizing, real load testing on real data. ▸ Full stack developer and software developer foundations - front end experience with React and Node.js, web developer capabilities for full-cycle delivery. ▸ Adjacent stack: Docker, Kubernetes, Terraform, AWS, GCP, Redis, Kafka, PostgreSQL, OpenAI and Anthropic API integration. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ HOW I WORK Every Backend engagement starts with a discovery pass on the existing codebase before a line of code changes. Service boundaries, data flow, and observability gaps mapped upfront. Async with daily updates, Claude Code and AI tooling to move faster without compromising stability. Documented handoff so the Backend is maintainable after the engagement ends. MY PROCESS ▸ Day 1-3: Backend discovery on the Go or Python codebase, identifying load-bearing trade-offs. ▸ Week 1: stable Backend services, branch hygiene, CI gates, observability baseline. ▸ Weeks 2-4: Backend feature shipping in two-week iterations. Code review before merge. ▸ Continuous: working code in your repo end of day. You own the Backend codebase and every architecture decision is yours to question. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Already have a project in mind? Send me a message - no brief needed. I will help map out the scope and see what is possible before committing to anything.

I build native iOS apps in Swift and SwiftUI including ones that need share/action extensions, App Groups, custom URL schemes, and embedded binaries plus the Go backends and APIs behind them. If you need someone comfortable both in the UI and down at the platform/systems layer, that's my sweet spot. I work across React Native/iOS, Go/Node.js backends, PostgreSQL/MongoDB/Redis, OpenAI integrations, payment/subscription flows, dashboards, wallets, indexers, and real-time data systems. I am a good fit if you need someone who can own the technical flow from backend to app, communicate clearly, and move a product from MVP to production without needing every small detail explained. I also bring a specialty most mobile devs don't have: blockchain and Web3, including smart contracts, wallet integration, blockchain APIs, and Hyperledger Fabric, plus AI integration when your product calls for it. Because I own the full flow (mobile app, backend, and the API contract between them), I'm a single point of accountability. One person ships the whole product, production-ready, instead of you coordinating three. If you're building a mobile app, especially one with Web3 or AI under the hood, let's talk about what you're building.

I specialize in building high-performance, robust web scrapers using Golang. If you need clean, structured data from complex websites, I can help you automate the collection process, save your time, and ensure data accuracy. My expertise includes: Golang Expertise: I use the power of Go to create fast, concurrent scrapers that handle large-scale data tasks efficiently. Advanced Scraping: Experience in bypassing anti-bot protections, managing residential proxies, handling dynamic content (JavaScript-rendered pages), and managing session persistence. Data Delivery: I provide data in the format you need (CSV, JSON, Excel, or direct integration into databases/Google Sheets). Reliability: I focus on building resilient scripts that monitor themselves and handle errors gracefully, ensuring you don't lose data due to site structure changes. Whether you are looking to extract real estate listings, e-commerce product data, or need to automate a repetitive data entry task, I deliver scalable and maintainable solutions.

I help startups and businesses build production-ready web applications that scale, from MVP to 100K+ users. With 9+ years of full-stack development experience with particular focus on finance sector, I've delivered 50+ projects, including fintech platforms with Stripe/Plaid integration, AI-powered applications using OpenAI/Gemini/Grok/Claude, and high-performance APIs handling millions of requests. What I Build: ⤷ Full-stack web applications (Django/FastAPI/React, C# & .NET Core) ⤷ RESTful & GraphQL APIs with clean documentation ⤷ AI/LLM integrations (OpenAI, Gemini, Grok) ⤷ Payment systems & Payment Gateway Integration (Stripe, Plaid, Paypal, Square & Polygon) ⤷ Chrome extensions & Figma plugins. ⤷ Lovable, Replit Pro, V0 & Figma Make. ⤷ Web scraping & automation solutions. ⤷ Financial Reporting & Analysis (Parquet, Excel, openbb, csb, tsv) ⤷ Algo Trading (Backtrader, Zipline, Quantconnect, MetaTrader 5, MQL5 & TradingView) ⤷ Crypto Trading (Mean reversion and trend following) ⤷ Data Analysis (Parquet, Apache Arrow, PyArrow, CSV, Excel) ⤷ ML Finance Models (LightGBM, XGBoost, LSTM, TCN) ⤷ Accounting API Integrations (QuickBooks, Xero, Intuit, Wave, AccountEdge) Core Stack: ✓ Backend: Python, Django, FastAPI, Laravel, NestJS, Spring, Golang, Rust, gRPC ✓ Frontend: React, TypeScript, Vue, Angular, MUI ✓ Database: PostgreSQL, MySQL, DynamoDB, Supabase, MongoDB ✓ Cloud: AWS (Lambda, S3, AppSync, RDS, ECS, EKS), Digital Ocean, Docker ✓ AI: OpenAI API, Gemini, LLM integration, n8n ✓ ML: Self-Supervised Learning Models ✓ Fintech tools & services: Alpaca, IBKR, Binance, Blockchain, nautilustrader & Qlib Why Clients Choose Me: ✓ Clear communication with daily/weekly updates ✓ Clean, documented code you can maintain after handover. ✓ I focus on your business goals, not just feature requests. Recent Results: Built a fintech dashboard, reducing the client's data processing time by 60%. Developed an AI-powered content platform serving 10K+ daily users. Created trading automation tools integrating TradingView APIs and Plaid. Live trading volume: $80M in Q1-3 2025. Complex AWS orchestration using ECS, EKS and other Generative AI Applications. Ready to discuss your project? Send me a message with your requirements, and I'll respond within 24 hours with a clear plan.