I help teams build and improve Python backends for SaaS products and growing platforms, whether that means starting an MVP from scratch, integrating AI capabilities, or improving an existing production system. Most of my work involves owning backend systems: reviewing code, fixing performance issues, migrating services, designing scalable APIs, and making sure applications stay stable as they grow. I mainly work with Python, Django, FastAPI, Flask, and AWS, while selecting the right architecture and tools based on the actual business problem and computer vision solutions for image processing, detection, and AI-based analysis and AI/ML integrations including LLM applications, RAG pipelines, NLP systems, and intelligent automation. Moreover, I have been working as a Python developer for 8+ years, supporting real production systems across different industries. I’m comfortable building new features, cleaning up legacy code, integrating AI/ML solutions, and handling the important engineering work that keeps systems reliable. What I usually work on: Python backends using Django, FastAPI, and Flask SaaS platforms & MVPs (early builds → production) Microservice migrations and backend restructuring REST API development and third-party integrations Code reviews, refactoring, and performance optimization Databases like PostgreSQL, MySQL, and MongoDB Background jobs with Celery, Redis, and RabbitMQ Deployments and scaling on AWS AI/ML integrations including LLM applications, RAG pipelines, NLP systems, and intelligent automation Computer Vision solutions for image processing, detection, and AI-based analysis Key Projects: Touringery: Multilingual tour booking APIs → improved booking throughput by 50%. Moeving EV: Fleet tracking microservices → real-time data processing for 500+ vehicles. Kera Health: Healthcare backend handling patient data, appointments, and AI-powered diagnostics. Healthcare AI Diagnostics: Integrated ML models for automated patient reporting and intelligent insights. AI Chatbots & NLP Systems: Built LLM-powered conversational solutions, knowledge retrieval systems, and AI automation workflows. I work well independently or with a team, communicate clearly, and take ownership of the backend and AI systems I build. I’m available 40+ hours per week and can overlap with US and European time zones. If you’re looking for someone who can step into your backend, improve your systems, and build scalable AI-powered solutions, "just click Invite" I usually reply within a few hours. Keywords: Python Backend Developer | Django Developer | FastAPI Developer | Flask Developer | REST API Development | SaaS Backend Development | Microservices Architecture | Async Programming | Celery | Redis | RabbitMQ | PostgreSQL | MySQL | MongoDB | Docker | Kubernetes | AWS | Cloud Deployment | TDD | CI/CD | High-Performance Systems | Production-Ready Backend | Scalable Backend Solutions | Legacy System Modernization | AI Backend Integration | Machine Learning Engineer | NLP | LLM Integration | RAG | Retrieval Augmented Generation | Vector Databases | AI Agents | Chatbots | Computer Vision | Image Processing | ML Pipeline | Predictive Analytics | AI-Powered Automation | Long-Term Projects

⭐⭐⭐⭐⭐ "The final result and customer satisfaction exceed expectations" - Gleb Goloborodko, Founder, GetCode ⭐⭐⭐⭐⭐ "Their team respects our internal situation while being proactive towards upcoming issues" - Pavol Norulak, Managing Director & Co-Founder, NSI I help product teams build backend systems that scale cleanly - multi-tenant SaaS platforms, B2B product backends, eCommerce infrastructure, and async event-driven architectures that stay reliable when traffic, data, and requirements grow. 𝗪𝗵𝘆 𝗰𝗹𝗶𝗲𝗻𝘁𝘀 𝗰𝗵𝗼𝗼𝘀𝗲 𝘁𝗼 𝘄𝗼𝗿𝗸 𝘄𝗶𝘁𝗵 𝗺𝗲 • Architecture-first thinking - the right design decision on day one prevents expensive rewrites later • Milestone-based delivery with demos and documentation at every stage - no black-box development • Early risk identification - scope and budget issues surfaced before they become problems • One senior developer who also manages the project - clear communication, no handoffs, no surprises • Long-term technical partnership mindset - accountable for outcomes, not just code delivery • Production-ready from day one: test coverage, CI/CD, structured logging, error monitoring Over 8 years, my team at Angle2 and I have shipped SaaS platforms, marketplaces, CRMs, B2B portals, analytics platforms, job boards, and payment-integrated products across fintech, eCommerce, and enterprise software - on time, within scope, with full documentation. My 14+ years in project management means you get senior development combined with predictable delivery 𝗕𝗮𝗰𝗸𝗲𝗻𝗱 & 𝗦𝗮𝗮𝗦 𝘀𝘆𝘀𝘁𝗲𝗺𝘀 • SaaS & B2B backends: multi-tenant architecture, tenant isolation, row-level security, role-based access control, OAuth / authentication, audit logging • eCommerce & marketplace systems: product catalogues, order management, inventory, payment flows, webhook event handling • Payment integrations: Stripe Connect (Standard & Express), subscription billing, split-payment flows, async webhook handling • APIs: Django REST Framework, FastAPI, RESTful API design, REST API, third-party integrations (Stripe, Twilio, OpenAI, Gmail API) • Async systems: AsyncIO, Celery, Redis, background workers, job scheduling, distributed event processing • Data processing: ETL pipelines, web scraping, PDF/document parsing, bulk CSV ingestion, data workflows • Cloud & DevOps: AWS, GCP, Azure, Docker, CI/CD (GitHub Actions, GitLab CI), structured logging, error monitoring 𝗔𝗜 & 𝗟𝗟𝗠-𝗽𝗼𝘄𝗲𝗿𝗲𝗱 𝘀𝘆𝘀𝘁𝗲𝗺𝘀 • Intelligent assistants and AI-powered features using LangChain, OpenAI API, and RAG pipelines • Vector search and semantic retrieval: FAISS, Pinecone, vector database integrations • LLM workflows integrated into structured backend APIs with production stability • System architecture for AI-enabled products - reliable, scalable, maintainable 𝗦𝗲𝗿𝘃𝗶𝗰𝗲𝘀 • SaaS MVP development - system architecture through production-ready deployment • Multi-tenant platform builds - data isolation, tenant management, subscription tiers • eCommerce backend development - marketplace logic, inventory, fulfilment integrations • Payment system integration - Stripe Connect, subscription billing, webhook pipelines • AI / LLM integration - LangChain, RAG pipelines, vector search, OpenAI API • Backend architecture audits and implementation roadmaps • PostgreSQL schema design and query optimisation • Django to FastAPI migration planning • AWS / GCP cloud architecture review and cost optimisation • CI/CD pipeline setup - production-ready from day one My background is senior Python backend development - 8 years of building SaaS platforms, B2B product backends, and eCommerce infrastructure using FastAPI, Django REST Framework, AsyncIO, Celery, PostgreSQL, Redis, AWS, and GCP. I focus on projects where architecture matters from day one - multi-tenant SaaS platforms, marketplace backends, B2B portals, and eCommerce systems where scale and reliability are not optional. Beyond core backend work, I integrate LangChain, RAG pipelines, and OpenAI API into production systems - built to be stable, maintainable, and part of a real product rather than a prototype. If you are building a SaaS platform, a marketplace, a B2B portal, or a payment-integrated product and need a senior Python backend developer who manages the delivery end to end - I would like to hear about it.

Hello and welcome to my profile! My name is Vadym. I'm a skilled Java and Python developer from 🇺🇦 My expertise is Backend development. But also I have experience with Angular 2+. I continue to improve my skills and already know that the best way to learn something new and evolve as a professional is to work on the projects as a part of a team. My main areas of expertise: Backend: Python, Java Frontend: HTML/CSS –basic, Angular 2+ Frameworks: FastAPI, Spring Framework (SpringMVC, Spring Boot, Spring Data, Spring Security) ORM: Hibernate Testing: pytest, FastAPI TestClient, JUnit, JMeter VCS: Git (GitHub) Databases: PostgreSQL, MySQL, MongoDB, SQLite, MS SQL Server, Supabase Build automation tools: Maven, Gradle API documentation tools: OpenAPI, Swagger IDE: Cursor, PyCharm, IntelliJ IDEA Other: REST API, Lombok, Docker, Postman, Pydantic, Heroku, Stripe, Amazon APIs (general familiarity) Ready for any skills evaluation, test task, technical interview. My main goal is to find an interesting project, so if you need a talented developer with technical background let's discuss our cooperation!

💼 12+ Years Experience 🏆 Top Rated Plus (Top 1%) on Upwork 📈 5900+ Hours Billed ⚡ 100% Job Success 💰 $100K+ Earnings | 30+ Projects Delivered 🚀 I help businesses build scalable backend systems, AI solutions, and high-performance SaaS platforms using Python. 📊 Core Capabilities Build scalable, high-performance APIs using FastAPI, Django, and Flask. High-throughput SaaS platforms, ETL pipelines, AI/ML workflows, and automation systems. DevOps proficiency: Docker, Kubernetes, CI/CD, GitHub Actions, AWS, GCP. Refactoring legacy systems, microservices architecture, and performance optimization. Strong focus on quality, maintainability, and measurable outcomes. ✅ How I Help Clients Backend APIs and full-stack development with Django/Flask + React/Next.js. End-to-end SaaS and web applications with FastAPI/Django backends. Modernizing legacy Python codebases and migrating to microservices. Data pipelines, ML workflows, AI automation, and ETL solutions. 🔥 Key Projects & Achievements • AI Recruitment Platform – FastAPI + NLP → Automated candidate matching, reducing screening time by 40%. • Medical AI Automation Tool – Flask + PostgreSQL → Streamlined workflows and reporting for medical operations. • Sales Intelligence SaaS – FastAPI + Redis + Celery → Delivered real-time analytics for large datasets. • Ecommerce & Wellness Platform – Django + React → Built a complete product and order management system. • AdTech Backend – Flask + TensorFlow → Developed high-volume campaign targeting for digital signage. • Data Pipelines – Python asyncio + ETL → Processed large-scale datasets efficiently, improving data processing speed by 30%. 🧩 Roles I Excel In: Senior Python Developer · Backend Engineer · Python DevOps Engineer · AI & ML Developer · Full-Stack Python Developer · FastAPI/Django Specialist · Flask API Architect · Automation & NLP Developer 🏭 Industries Served: Recruitment / HR Tech · Healthcare · Sales SaaS · E-commerce & Wellness · AdTech · AI & Automation · Data Engineering 💬 Client Feedback: ⭐⭐⭐⭐⭐ “Hassam managed our AWS ETL project professionally, including code and infrastructure. Highly recommended.” ⭐⭐⭐⭐⭐ “Hassam quickly understood our codebase and contributed across components. He takes initiative and adds value.” ⭐⭐⭐⭐⭐ “Hassam did a great job for us. He got up to speed on our complicated architecture quickly, and he made great contributions to our product.” 🚀 Let’s Build Something Great: Message me to schedule a 15-minute call. I’ll show you how to deliver reliable, scalable Python solutions with measurable impact.

Businesses don't need another AI demo, they need reliable, production-ready solutions that solve real problems. I'm an AI and Backend Engineer with 5+ years of experience building intelligent applications, scalable backend systems, and AI-powered automation solutions across healthcare, finance, e-commerce, and industrial domains. My expertise spans the full development lifecycle, from solution architecture and model development to API design, deployment, and production scaling. Whether you're building a new AI product, integrating AI into an existing platform, or developing a robust backend infrastructure, I focus on delivering solutions that are practical, maintainable, and aligned with business goals. Core Expertise: - Generative AI & Large Language Models (LLMs) - Retrieval-Augmented Generation (RAG) - AI Chatbots & Conversational Assistants - LangChain & LlamaIndex Development - Computer Vision & Image Processing - Python Development (FastAPI, Django, Flask) - Backend Architecture & API Development - Machine Learning & Deep Learning Solutions - AI Model Deployment & Production Systems Recent project experience includes: • Developing AI assistants that retrieve, process, and reason over proprietary business knowledge bases • Building healthcare NLP systems capable of analyzing medical information and supporting preliminary diagnostic workflows • Creating computer vision applications for inventory management, quality control, object detection, and image segmentation • Implementing AI-powered financial advisory platforms that generate personalized insights and recommendations • Designing recommendation engines using deep learning architectures and behavioral data analysis Tech Stack: Python | FastAPI | Django | Flask | LangChain | LlamaIndex | PyTorch | OpenAI API | React | Next.js | JavaScript I can help with everything from initial architecture planning and proof-of-concept development to deployment, optimization, and long-term scaling. If you're looking for an engineer who can combine AI expertise with strong software engineering practices to build reliable, production-ready solutions, I'd be glad to discuss your project.

100% Job Success Score I build rock-solid, cloud-ready back-ends in Python and keep them running with first-class DevOps, APIs, micro-services, CI / CD, Docker/Kubernetes, IaC, observability – you get the whole package, plus enough front-end skill to integrate seamlessly with React or Vue teams. Core Technical Stack Languages :- Python 3.x** (10 y), TypeScript, Bash | Frameworks :- Django • DRF, FastAPI, Flask, Celery | |Datastores :- PostgreSQL, MySQL, Redis, MongoDB | Cloud / DevOps:- AWS (ECS, Lambda, RDS, S3, …); GCP; Docker; **Kubernetes** (EKS/GKE); Terraform & Pulumi CI / CD :- GitHub Actions, GitLab CI, Jenkins, Azure pipelines, Google cloud build Observability :- Prometheus, Grafana, Loki, ELK, OpenTelemetry | Front-end glue :- React, Next.js, Tailwind – enough to wire up back-end payloads and build admin panels Testing :- Pytest, Tox, Coverage > 95 %; contract tests with Pydantic/FastAPI schemas, Automation testing with playwright 🧩 Typical ways I add value 1. Green-field MVPs – design the data model, choose the right Python framework, stand-up a CI pipeline & ship v1 inside weeks. 2. Legacy rescue – untangle monoliths into containerised services, replace ad-hoc scripts with repeatable IaC, improve deployment time from hours to minutes. 3. Scale-up accelerators – introduce async FastAPI, Redis queues, and horizontal autoscaling to handle 10× user growth with zero downtime. 4. Developer-experience upgrades – pre-commit hooks, conventional commits, automated versioning & tagging, opinionated Docker dev-containers. 🛠 My working style 1. Consultative first – I’ll challenge requirements, not just implement them. 2. Documentation matters – every repo ships with a Makefile, a one-command local dev setup, and architecture ✧ sequence diagrams. 3. Transparent estimates & over-communication** – daily updates, demoable progress twice a week. 4. Security by default** – OWASP, 12-Factor, encrypted secrets, least-privilege IAM baked in. 🤝 What you can expect when you hire me *Fast onboarding – I skim your README, run the stack, identify quick wins within the first day. *Senior-level autonomy – create epics, prioritise tasks, own delivery so you can focus on the business. Everything with be tracked and shared to you on daily basis plus will share the weekly report each Friday to have insight about the progress. *Production-grade quality – unit & integration tests, GitOps workflows, auto-rollbacks. *Knowledge transfer – hand-over docs, recorded Loom walkthroughs, pair-sessions for your devs. ✅ Let’s build something Whether you need a lightning-fast API, a resilient micro-service architecture, or a full CI / CD pipeline that deploys on every commit, I’m ready to jump in. Click “Invite to Job” or send me a message and I’ll reply within 24 hours with a concise plan tailored to your requirements. *(Available 30–40 hrs / week, UTC+5:30, fluent English.)*

🏆 𝐓𝐨𝐩 𝐑𝐚𝐭𝐞𝐝 - 𝐓𝐨𝐩 𝟏𝟎% 𝐨𝐟 𝐓𝐚𝐥𝐞𝐧𝐭 𝐨𝐧 𝐔𝐩𝐰𝐨𝐫𝐤 🌟 𝟏𝟎𝟎% 𝐂𝐮𝐬𝐭𝐨𝐦𝐞𝐫 𝐒𝐚𝐭𝐢𝐬𝐟𝐚𝐜𝐭𝐢𝐨𝐧/𝐉𝐨𝐛 𝐒𝐮𝐜𝐜𝐞𝐬𝐬 I am highly skilled Full-Stack Developer with years of hands-on experience in building scalable, secure, and high-performance applications for startups, SMEs, and enterprise-level systems. Proven track record of delivering end-to-end solutions across both web and mobile platforms, leveraging modern frameworks, clean architecture, and best coding practices. Adept at translating complex business requirements into robust technical solutions, with a strong focus on performance, user experience, and maintainability. Whether you're launching a product, improving your existing system, or building a feature-rich dashboard or mobile app, I have the skills to turn your vision into reality. 🖥 Frontend Expertise ✅ Angular, React.js, Next.js, React Native, TypeScript, JavaScript ✅ UI Frameworks: Tailwind CSS, Material UI, Sass, CSS3 ✅ State Management: NgRx, Redux Toolkit, Redux Saga 🧠 Backend Expertise ✅ Node.js, NestJS, FastAPI, ASP.NET Core ✅ Databases: MongoDB, PostgreSQL, MySQL ✅ RESTful APIs, Authentication (JWT, OAuth), Role-based Access Control 📱 Mobile Development ✅ React Native, Flutter ✅ Cross-platform mobile app development with clean architecture and native performance ⚙️ Dev Tools & Testing ✅ Git, Docker, CI/CD, Postman ✅ Testing: Jest, Cypress 🧩 Competitive Programming & Algorithms ✅ Strong problem-solving skills ✅ Proficient in Python, JavaScript, TypeScript ✅ Why Choose Me? ⭐ Clean, structured, and maintainable code ⭐ Fluent communication and fast response time ⭐ On-time delivery and unlimited feedback revisions ⭐ Strong problem-solving skills and experience in competitive programming ⭐ Passion for exploring new technologies and approaches.

Python Developer | FastAPI · Playwright · Selenium · AI Integration · Stealth Browser Automation 5+ years building production-grade Python systems for healthcare, finance, and government platforms — the workflows most developers refuse to touch. ⭐ 5/5 — "He reverse-engineered the network flow, saving me time and money. I immediately extended the project." ⭐ 5/5 — "Great work on backend. Quick with very high quality, happy to work again." ⭐ 5/5 — "Executed everything on the agreed timeline, communicated well, high quality work." 𝗪𝗵𝗮𝘁 𝗜 𝗯𝘂𝗶𝗹𝗱 If your process involves authenticated portals, JavaScript-heavy flows, unstable APIs, or data that must be accurate and repeatable — that's exactly where I work. One automation replaced 40+ hours of manual work per week. One pipeline processed 10,000+ records with retries and error recovery built in. 𝗣𝘆𝘁𝗵𝗼𝗻 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 & 𝗕𝗮𝗰𝗸𝗲𝗻𝗱 𝗔𝗣𝗜𝘀 ✅ FastAPI and Flask services, REST APIs, webhook-driven workflows ✅ Authentication, role-based access, token handling ✅ Third-party API integration and microservice-style Python backends ✅ Async I/O with asyncio and httpx, background jobs, concurrent pipelines ✅ Production-ready: structured logging, Docker, Linux deployment 𝗕𝗿𝗼𝘄𝘀𝗲𝗿 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻 & 𝗦𝘁𝗲𝗮𝗹𝘁𝗵 𝗦𝗰𝗿𝗮𝗽𝗶𝗻𝗴 ✅ Playwright, Selenium, Pyppeteer — public and authenticated websites ✅ Stealth browser automation: Cloudflare bypass, CAPTCHA handling, fingerprint evasion ✅ Stable session management, human-like interaction patterns ✅ JavaScript-heavy SPAs, dynamic DOM flows, and AJAX-driven portals ✅ Visa portals, healthcare verification systems, government dashboards 𝗔𝗜 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻 & 𝗟𝗟𝗠 𝗪𝗼𝗿𝗸𝗳𝗹𝗼𝘄𝘀 ✅ Claude API and OpenAI GPT integration into Python backends ✅ AI-powered automation pipelines and LLM-driven document processing ✅ Structured output, prompt design, and cost-controlled production deployments ✅ AI workflows embedded in FastAPI services and async Python systems 𝗗𝗮𝘁𝗮 𝗣𝗶𝗽𝗲𝗹𝗶𝗻𝗲𝘀 & 𝗘𝗧𝗟 ✅ End-to-end extraction, cleaning, enrichment, and export ✅ Pandas-based reporting, CSV and Excel automation, deduplication ✅ Structured handling of JSON, PDFs, and Base64-encoded data ✅ SQL, MongoDB, and deployment-ready data workflows 𝗥𝗲𝗮𝗹-𝗪𝗼𝗿𝗹𝗱 𝗣𝗿𝗼𝗰𝗲𝘀𝘀 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻 Visa applications and arrival cards, healthcare compliance forms, 2FA-protected verification systems, account verification flows, cross-portal status tracking — systems other developers assume cannot be automated. 𝗛𝗼𝘄 𝗜 𝘄𝗼𝗿𝗸 I start by understanding the real goal and edge cases. I deliver in small, reviewable milestones. You receive clean, documented code built for long-term maintainability — not a script that breaks next week. If you need reliable Python systems for complex, accuracy-critical workflows — share your requirements and I'll outline a clear approach. Python Developer | FastAPI | Flask | REST API | API Integration | Web Automation | Web Scraping | Playwright | Selenium | Pyppeteer | Stealth Browser Automation | Cloudflare Bypass | Async Python | asyncio | AI Integration | LLM Integration | Claude API | OpenAI | Data Pipelines | ETL | Pandas | Healthcare Automation | Government Portals | Visa Automation | Docker | MongoDB | SQL

📌 𝐄𝐗𝐏𝐄𝐑𝐓-𝐕𝐄𝐓𝐓𝐄𝐃 – 𝐓𝐎𝐏 𝟏% 𝐅𝐑𝐄𝐄𝐋𝐀𝐍𝐂𝐄𝐑 𝐎𝐍 𝐔𝐏𝐖𝐎𝐑𝐊 📌 8+ years of experience | 8𝟎𝟎𝟎+ Upwork hours | $2𝟎𝟎𝐊+ earned | 4𝟎+ Projects delivered | 𝟏𝟎𝟎% Job Success. Hey there, I am Muhammad Furqan and I help teams build dashboards and automations that actually make their work easier - whether we’re starting from scratch or cleaning up what’s already there. Slow dashboards → Optimized to load in under 2 seconds Fragile APIs → Rebuilt to handle 1M+ requests/day Manual workflows → Automated with AI/ML integration Tech debt → Refactored while shipping new features ⚡ QUICK WINS: ✅ Reduced API response time from 3.2s to 450ms (SaaS platform, 10K users) ✅ Built 15+ ChatGPT-powered apps using LangChain & vector databases ✅ Delivered payment systems processing $2M+ in transactions ✅ Launched complete MVP dashboards in 3-4 weeks with full testing 🔧 I BUILD: Web Applications: Django/Flask backends + React frontends AI Solutions: GPT-4, LangChain, Pinecone, custom LLM workflows APIs & Integrations: RESTful APIs, third-party services, payment gateways Infrastructure: AWS, Docker, microservices, database optimization ⚙️ CORE TECH STACK: Backend: Python, Django, Flask, FastAPI, Celery Frontend: React.js, JavaScript, HTML5, CSS3 AI/ML: OpenAI GPT-4, LangChain, Pinecone, Weaviate, FAISS Database: PostgreSQL, MongoDB, Redis, Elasticsearch DevOps: AWS, Docker, NGINX, Gunicorn Payments: Stripe, PayPal 🎯 IDEAL FOR: SaaS founders launching MVPs in 4-6 weeks Startups scaling from prototype to production Teams adding AI/ML to existing products Companies fixing performance bottlenecks 💬 READY TO START? Send me a message with: What you're building Your biggest challenge Your timeline I respond within 2 hours and deliver code that works. SKILLS: Python | Django | Flask | FastAPI | React.js | Full Stack Development | Web Application | API Development | RESTful API | PostgreSQL | MongoDB | Redis | OpenAI API | ChatGPT | GPT-4 | LangChain | Pinecone | Machine Learning | AI Integration | AWS | Docker | Microservices | Celery | JavaScript | Stripe | PayPal | Test-Driven Development | Performance Optimization | Database Optimization 💡 WHY THIS WORKS: ✓ 60% shorter – Takes 45 se

I’m Sandeep, a Senior Backend & AI Engineer with 5+ years of experience building AI-enabled SaaS platforms, high-performance APIs, LLM/RAG workflows, and production-ready microservices. I specialize in Python, FastAPI, Django, REST APIs, microservices, PostgreSQL, Redis, MongoDB, vector databases, LangChain, OpenAI/LLM integrations, Docker, Kubernetes, AWS, and GCP. My focus is to convert ideas and prototypes into secure, scalable, and maintainable production systems. At Coretus, I also work with reusable Microservices Accelerators for common backend foundations like authentication, RBAC, payments, notifications, API structure, and deployment patterns. This helps reduce repetitive setup work and allows more focus on your core business logic, AI workflows, and product scalability. What I can help you with : Backend Architecture & API Development  I build secure and scalable backend systems using Python, FastAPI, Django, REST APIs, OpenAPI/Swagger, PostgreSQL, MongoDB, Redis, and clean microservice patterns. AI, LLM & RAG Development  I develop AI-powered backend systems, RAG pipelines, LLM API integrations, LangChain workflows, embeddings, vector search, AI agents, and automation layers. SaaS & Multi-Tenant Platforms  I design backend systems for SaaS products with role-based access, tenant isolation, admin workflows, subscription/payment logic, dashboards, and scalable database structures. Async Processing & Data Workflows I build queue-based systems using Celery, Kafka, RabbitMQ, Redis, background jobs, event-driven workflows, and high-volume data processing pipelines. Cloud, DevOps & Production Deployment I dockerize applications, set up CI/CD pipelines, deploy on AWS, GCP, Kubernetes, AWS Lambda, or GCP Cloud Run, and support production debugging and performance optimization. I have worked on backend and AI systems for: AI recruitment SaaS with resume parsing, candidate matching, LLM integration, and vector search AI nutrition and meal planner app with food recognition, GPT APIs, Redis caching, and personalized recommendations Multi-tenant scheduling SaaS with calendar sync, timezone handling, payment workflows, and queue-based booking logic Algorithmic trading backend with Kafka, Redis, WebSockets, broker APIs, and real-time analytics Real-time communication app with WebSocket/WebRTC signaling, Redis sync, and low-bandwidth messaging workflows Job platform with REST APIs, Elasticsearch search, application workflows, and third-party integrations Why clients work with me Strong Python, FastAPI, Django, and backend architecture experience Practical experience with AI, LLM, RAG, vector databases, and automation workflows Scalable SaaS and microservices development approach Clean API structure with authentication, RBAC, documentation, and maintainable code Production-focused mindset from architecture to deployment Clear communication and reliable delivery Whether you need a backend from scratch, an AI/RAG feature, a scalable SaaS architecture, API optimization, automation workflows, or cloud deployment support, I can help you build a reliable technical foundation. Let’s connect and discuss how we can turn your backend idea into a secure, scalable, and production-ready system. Sandeep Thesiya Senior Backend & AI Engineer | Python | FastAPI | SaaS | RAG | Microservices