Hire the Best API Developers
in Nepal

I recently completed a FastAPI engineering engagement for Microsoft Research - delivered on time, rated 5.0 stars. I build production Python backends and data systems: - REST APIs with FastAPI - auth, validation, pagination, caching, rate limiting - Data pipelines and automation - PostgreSQL, Python, GitHub Actions - Web scraping and data extraction - BeautifulSoup, structured outputs to CSV/database - Dashboards and analysis - Tableau, Python Recent work: - Microsoft Research (via Upwork): FastAPI feature development and debugging under time constraints - search relevance ranking, TTL caching, CSV export endpoints, rate limiter fixes. Rated 5.0 stars. - Production portfolio platform: React + Vite frontend, FastAPI backend, Neon Postgres, deployed on Vercel with security hardening (WAF rate limiting, bcrypt, CSP headers). - NLP research: Master's thesis on bias mitigation in transformer models (FairBERT) - 35.4pp improvement in demographic parity over vanilla BERT. I hold a Master's in Computer Information Systems (GPA 3.71). I communicate clearly, scope before I quote, and deliver working, tested code - not promises. Available now for fixed-price or hourly projects. Send me your requirements and I'll respond within a few hours with a concrete plan.

Back-end API Developer with 5+ years of experience in designing, developing, and maintaining scalable, high-performance back-end systems using Java (Spring Boot) and Python (Flask). Experienced in building micro-service based architectures. Skilled in RESTful API development, Voice agent, AI/LLM integrations, including OpenAI APIs for automation and content generation.

Most businesses don’t have a code problem — they have a 𝐭𝐢𝐦𝐞, 𝐫𝐞𝐥𝐢𝐚𝐛𝐢𝐥𝐢𝐭𝐲, 𝐚𝐧𝐝 𝐬𝐜𝐚𝐥𝐢𝐧𝐠 𝐩𝐫𝐨𝐛𝐥𝐞𝐦 I help solve that by building backend systems, automations, and AI integrations that turn manual processes into efficient, scalable workflows. With 2,400+ hours on Upwork and a 100% Job Success Score, I focus on building systems that don’t just work — but actually support business growth. --- 🚀 How I help: • Build scalable backend systems (Node.js, Python, Django) • Design and integrate APIs (Stripe, Google APIs, third-party platforms) • Automate repetitive workflows using bots, scripts, and CI/CD pipelines • Integrate AI (LLMs like OpenAI) into real business use cases • Set up reliable infrastructure (Docker, GitHub Actions, GCP/AWS) --- 💡 Real work I’ve done: • Built automation systems to sync data between platforms (e.g., Notion ↔ APIs) • Set up CI/CD pipelines to reduce manual deployment effort and errors • Designed backend systems for scalable applications • Implemented end-to-end and API testing (Playwright, Behat) --- I focus on one thing: 👉 𝐫𝐞𝐝𝐮𝐜𝐢𝐧𝐠 𝐦𝐚𝐧𝐮𝐚𝐥 𝐰𝐨𝐫𝐤 𝐚𝐧𝐝 𝐦𝐚𝐤𝐢𝐧𝐠 𝐬𝐲𝐬𝐭𝐞𝐦𝐬 𝐫𝐞𝐥𝐢𝐚𝐛𝐥𝐞 --- If you’re dealing with: • repetitive manual processes • unreliable deployments • messy integrations • or want to introduce AI into your product I can help you build systems that actually work — and keep working. --- Let’s build something that saves you time and scales with your business.

👋 Hi, I’m Sabin — I help startups and product teams build scalable, fast, and clean full-stack web apps. My expertise spans from backend APIs and frontend UIs to AI-driven systems and cloud infrastructure that make products smarter, more autonomous, and future-ready. From MVP to launch, I deliver production-ready solutions with robust APIs, sleek UIs, AI agents, and cloud-native deployments that scale with your business. 💡 What I Can Build for You: ---------------------------------- ⚙️ Backend APIs using Django, FastAPI, or Node.js (REST & GraphQL). 🤖 Agentic AI systems — intelligent agents that plan, reason, and act across tools & APIs 🧠 AI integrations — OpenAI, Anthropic, LangChain, LlamaIndex, or local LLMs 🔄 Automation scripts for tasks like email parsing, database syncing, or 3rd-party integrations. 🖥️ Modern UIs with React/React Native — responsive, clean, and fast. 📊 Internal tools & dashboards to streamline ops or visualize metrics. 🔒 Secure authentication & access control, including JWT, OAuth, RBAC. 🛠️ Database design & optimization (PostgreSQL, MongoDB). ☁️ Cloud & DevOps — AWS (EC2, RDS, S3, ALB, Lambda, CloudWatch), Terraform, CI/CD pipelines, Docker & Kubernetes for scalable deployments 🚀 End-to-end products — from wireframes to deployable apps. ✅ Why Clients Like Working With Me: ---------------------------------------------- 🧩 Full-stack + AI + Cloud delivery — frontend, backend, AI systems, and deployment 📢 Clear communication — regular updates, documentation, and transparency ⚡ Early delivery — I aim to ship ahead of schedule with room for refinements 🔄 Flexible collaboration — async, sprint-based, or integrated with your team 🧠 Solution mindset — not just code, but solving business and AI adoption problems 🎯 Ready to launch or scale? Let’s talk about your project. Whether it’s a prototype, production system, or custom internal tool — I’ll help you get it built, fast. 📩 Message me to get started — I usually reply within a few hours.

AI Sector: - LangChain Expert (Tools Usage, Structured output generation, Middleware implementation, MultiserverMCPClient Integration) - LangGraph Expert (Graph Design for advanced workflows, Checkpoint Implementation, TimeTravel and Subgraph Integration) - RAG Implementation (Diverse chunking, embedding and retrieving strategies, Vector store, Vectorless RAG) - AI Guardrails Implementation (Middleware hooks, Human in the loop guardrails, Custom and layered guardrails formation) - LLM Evaluation (Test and Golden dataset creation, Ground truth based diverse metrics [context precision, faithfulness, relevancy], full tracing with Langfuse & Logfire. - LLM Applications (Cloud deployment, Unified API Implementation, Agent Fallback Implementation, Load balancing, Caching) - Frontier LLM Models Challenge (Design problems which can fail frontier models, rubrics generation, AI response grading) API Sector: - FastAPI, Flask, Django - Website building and deployment Automation Sector: - Python based automation framework like Selenium, Playwright, Puppeteer, Scrapy - n8n based automation - zapier based automation - Custom GUI automation and integration Testing: - TDD - Black box testing of Applications - LLM based test cases generation Data Sector: - pyspark, pandas, matplotlib, scipy, pytorch, keras - plotly and dash for data visualization Introduction: Python Developer with 7+ years of experience in developing and designing applications. Regular user of Linux, Docker containers, Git, Python based automation.

Django & FastAPI Developer * 7+ years of web development experience * Skilled in Python development with Django, FastAPI & Flask * Expert in data handling (Pandas, BeautifulSoup) * Experienced in database management (PostgreSQL, MySQL, SQLite) Available for less than 30 hrs/week *I have also worked physically at a Newcastle, Australia-based company for years. It taught me good collaborative skills and being productive as a team. *Domain Driven Design with FastAPI